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  • 1.
    Ahmed, Uday
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Ayo, Priscilla
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Filosofiska fakulteten.
    Developing Common Questions about Integrated Product Service Engineering (IPSE), Ecodesign and Engineering Education2015Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    In the recent years, more and more manufacturing firms recognize the benefit of providing products together with related services with an aim to gain higher profits as compared to supplying products without additional services. On the other hand, the competition in the global markets has been increased dramatically through increased sales of services in order to gain additional value for their products. In addition, several environmental challenges such as climate change, pollution, global warming impact, greenhouse gases emissions have played a vital role by influencing on the production protocols and trend of the companies. These challenges forced manufacturing countries to take into consideration environmentally conscious approach to their design thinking and industrial production processes. As a result, it became an important drive for manufacturing industries to shift from traditional product-oriented to service-oriented business models that has been witnessed during the last few years.

     

    The objective of this study research is to develop common questions that capture fundamental and common issues about Integrated Product Service Engineering (IPSE), Design for Environment (DFE) and Engineering education are effectives for industries to check and develop their knowledge, because the Engineering education plays a necessary role in associating socio-ethical knowledge with scientific and technological advances. The strategy taken to conduct this thesis task was first to study and understand the concept of Product Service System (PSS), IPSE, and Ecodesign as well as Engineering Education. Informative knowledge on these concepts were collected by reviewing several related journal articles, CIRP IPS2 conference proceedings.

     

    In this thesis the concepts of PSS, IPSE, DFE and Engineering Education discussed to develop the key common questions and issues to address the environmental, economic and social problems. Since PSS aims to reduce consumption through alternative schemes of product use as well as to increase overall resource productivity and dematerialization, but IPSE does not focus on a single factor but incorporates a wide range of factors such as environmental, social and economic issues. Whilst one of the main problems in this research focused on how to develop and strengthen the relationship between the academia and industry, and how this relation can be used to improve the academic performance and scientific research at universities and transfer them to industry.

     

    Sustainability and the life cycle concept have become a main solution for various problems such as a growing world population and a change in the industrial culture to come. As results Ecodesign and environmental considerations, financial aspects, product improvement as well as the commercial aspects were discussed in this project by understanding the previous concepts. The university considered as an important base of cultivating the talents, basic of inputs business organizations which help them to develop and improve their level of performance and quality of their products and services, and enhance its competitive position in the market. Changes in organized science further encouraged university interests in expanding technology transfer, because the scientific disciplines play an important role in influencing the type of interactions with industry as well as the University and Industry collaboration became the basic method of solving the problems to achieve (environmental, economic and social) sustainability.

  • 2.
    Aldén, Elin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Hantering av digitala verktygsmodeller: En studie av hur 3D-modeller av monteringsverktyg ska lagras, struktureras och geopositioneras på Scania CV AB inom Chassimontering2012Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [sv]

    På grund av ökad produktkomplexitet och digitala arbetssätt har fler företag insett nyttan i att implementera och använda sig av bra system för Produkt Lifecycle Management och Product Data Management för att hantera produkten genom dess livscykel. Funktionen hos PLM-system är framförallt att se till att alla har tillgång till den senast uppdaterade datan. Detta uppnås genom ett centralt ställe att lagra produktdata samt möjlighet att strukturera och hantera datan. Scania använder sig av Spectra och Enovia för att strukturera och lagra dagens konstruktionsdata. På senare år har digital provmontering införts i chassiproduktion som ett komplement till den fysiska provmonteringen. Detta för att digitalt simulera monterbarhet av nya artiklar innan de går ut i produktion.

    På provmonteringen på chassiavdelningen MSPAP har det upptäckts ett behov av att bättre lagra och strukturera de verktygsmodeller som används under provmonteringar. Framförallt behövs det skapas en större tillgänglighet till modellerna. Verktygsmodellerna används för att simulera åtkomst för verktyg vid montering. Examensarbetet utförs för att se över införandet av Enovia och Spectra även i produktionen för att hantera den ökade mängden 3D-modeller som idag lagras på processteknikernas egna datorer.

    Två metoder för att importera befintliga och framtida 3D-modeller in till Enovia har tagits fram. Det är processteknikerna i produktion som gör verktygsinvesteringar och därför ska de utföra importerna till Enovia när de får in nya ritningar/modeller från verktygsleverantörer. En teststruktur byggdes även upp i Spectra, Scanias PLM-system utefter dagens monteringssekvens på chassiline. En undersökning av hur verktygsmodeller ska positioneras geometriskt i den digitala miljön har också genomförts.

    Studien visade att chassiproduktion borde införa Enovia för lagring av modeller, och även se över strukturering och möjlighet till geopositionering, av verktygsmodeller. För att geopositionering ska ske korrekt krävs det att systemstöd tas fram även för verktygsmodeller och inte bara för produkter som finns idag.

    För att chassiavdelningen och Scania i stort ska förbättra sin utvecklingsprocess och minska omtag och slöseri bör kommunikationen mellan produktion och utveckling bli bättre. Kommunikation kommer att förbättra utnyttjandet av varandras kunskaper och resurser. Scania borde även ställa högre krav på sina underleverantörer av verktyg såsom krav på leverans av 3D-material för att underlätta sin strävan mot ett digitalt arbetssätt i en 3D-miljö.

  • 3.
    Andersson, Frida
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    Hagqvist, Astrid
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    Konstruktion för tillverkning av strukturdelar i komposit: En DFM-strategi för SAAB Aerostructures2013Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [sv]

    På SAAB Aerostructures i Linköping utvecklas och tillverkas delsystem, så som dörrar och skevroder, till kommersiella flygplan åt framförallt Boeing och Airbus. Inom flygindustrin går utvecklingen mot en större användning av kompositmaterial i denna typ av strukturer. För att befästa sin position på marknaden och bygga kunskap kring konstruktion i och tillverkning av kompositmaterial har SAAB startat ett forskningsprojekt kallat GF Demo. Projektet syftar till att ta fram nästa generations kompositstrukturer för civilflygplan, samt att utveckla effektiva produktionsprocesser för detta. En utmaning med konstruktioner i kompositmaterial är den dyra och komplexa tillverkningsprocessen. För att skapa möjlighet för effektiv tillverkning måste konstruktionerna anpassas efter produktionstekniska krav tidigt i utvecklingsarbetet. Syftet med detta arbete är att utveckla en strategi för hur SAAB ska lyckas med detta. Arbetet har fokuserat på large cargo door till Boeings Dreamliner som är ett av de delsystem som ingår i GF Demo. SAAB har som målsättning att fördubbla takten i tillverkningen av dessa dörrar, för att uppnå målet måste konstruktionen utvecklas för att passa tillverkningen. Ett sätt att skapa roduktionsanpassade konstruktioner är att arbeta med DFM. Genom att undersöka kommersiella DFM-metoder och hur andra företag arbetar med dessa frågor har en strategi anpassad efter företagets förutsättningar utvecklats. Den benchmarking och litteraturstudie som genomfördes visade på ett antal faktorer som skapar förutsättningar för ett lyckat arbete med DFM. De viktigaste faktorerna är att arbetet är förankrat i hela organisationen och att det finns väldefinierade mål med arbetet samt en tydlig ansvarsfördelning. För att kunna identifiera vilka specifika utmaningar som finns på SAAB har anställda på företaget intervjuats. De utmaningar som identifierats är framförallt tillverkningen av kompositartiklar, granskningar av konstruktioner utifrån produktionstekniska förutsättningar samt rutiner vid konceptval. Utifrån detta har en strategi utformats som hanterar främst dessa utmaningar och på lång sikt säkrar att de viktigaste framgångsfaktorerna realiseras på SAAB. En del av strategin är ett verktyg som konstruktörerna kan använda i sitt dagliga arbete för att underlätta utvecklingen av tillverkningsvänliga konstruktioner. Den framtagna strategin inbegriper organisatoriska, taktiska och strategiska förändringar. Den är utformad för att möta problematiken kring framförallt kompositartiklar och tillverkningen av dessa. Strategin innehåller moment från kommersiella produktutvecklings- och DFM-metoder som har anpassats efter de förutsättningar som finns på SAAB. Att arbeta strukturerat med DFM bidrar till en effektivare produktutvecklingsprocess och utveckling av konstruktioner anpassade för tillverkningsprocessen.

  • 4.
    Andersson, Frida
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Hagqvist, Astrid
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Björkman, Mats
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Design for Manufacturing of Composite Structures for Commercial Aircraft: The Development of a DFM strategy at SAAB Aerostructures2014Inngår i: Procedia CIRP, ISSN 2212-8271, Vol. 17, s. 362-367Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Within the aircraft industry, the use of composite materials such as carbon fiber reinforced plastics (CFRPs) is steadily increasing, especially in structural parts. Manufacturability needs to be considered in aircraft design to ensure a cost-effective manufacturing process. The aim of this paper is to describe the development of a new strategy for how SAAB Aerostructures addressing manufacturability issues during the development of airframe composite structures. Through literature review, benchmarking and company interviews, a design for manufacturing (DFM) strategy was developed. The strategy ensures that the important factors for successful DEM management are implemented on strategic, tactical and operational levels that contribute to a more cost-efficient product development process and aircraft design.

  • 5.
    Andreasson, Martin
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    Irvall Karlsson, David
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    Genomloppstidssänkning för lågvolymstillverkning med hög variation: En kartläggning av värdeflödet i en tillverkningsprocess av hylsor2018Independent thesis Basic level (degree of Bachelor), 10,5 poäng / 16 hpOppgave
  • 6.
    Ankarberg, Martin
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    Jilnö, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    Redesign of Gas Hydraulic Suspension for Product Service System: A Master Thesis Work at Strömsholmen AB2018Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    In these times, when manufacturing firms wonder how to integrate products and services into innovative offerings, how should products be designed to be of most value? This study is the investigation of this question for the manufacturing firm Strömsholmen AB, which designs gas springs and hydraulic suspension. The research has led to interviews of personnel to identify challenges and a workshop to generate new service ideas. By analyzing a specific gas hydraulic suspension product, this study shows that designing for product service systems (PSS) with a life-cycle perspective specifically for manufacturing, assembly, delivery, use, maintenance and remanufacturing, can greatly reduce costs and open up for innovative PSS business models. Using Design for Assembly, Design for Disassembly, Design for Serviceability and Design for Remanufacturing shows how concrete improvements to a product can be made. Improvements that show the potential of a redesign for the gas hydraulic suspension. Integrating products and services and pursuing the ideas and methods of this thesis, will ultimately make Strömsholmen better prepared to differentiate, to stay competitive, to deepen customer relations and to gain greater profits long-term.

  • 7.
    Björnsson, Andreas
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Automated layup and forming of prepreg laminates2017Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Composite materials like carbon fiber-reinforced polymers (CFRPs) present highly appealing material properties, as they can combine high strength with low weight. In aerospace applications, these properties help to realize lightweight designs that can reduce fuel consumption. Within the aerospace industry, the use of these types of materials has increased drastically with the introduction of a new generation of commercial aircraft. This increased use of CFRP drives a need to develop more rational manufacturing methods.

    For aerospace applications, CFRP products are commonly manufactured from a material called prepreg, which consists of carbon fibers impregnated with uncured polymer resin. There are two dominant manufacturing technologies for automated manufacturing using prepreg, automated tape layup and automated fiber placement. These two technologies are not suitable for all types of products, either due to technical limitations or a combination of high investment costs and low productivity. Automation alternatives to the two dominant technologies have been attempted, but have so far had limited impact. Due to the lack of automation alternatives, manual manufacturing methods are commonly employed for the manufacturing of complex-shaped products in low to medium manufacturing volumes.

    The research presented in this thesis aims to explore how automated manufacturing systems for the manufacturing of complex CFRP products made from prepreg can be designed so that they meet the needs and requirements of the aerospace industry, and are suitable for low to medium production volumes. In order to explore the area, a demonstrator-centered research approach has been employed. A number of demonstrators, in the form of automated manufacturing cells, have been designed and tested with industrial and research partners. The demonstrators have been used to identify key methods and technologies that enable this type of manufacturing, and to analyze some of these methods and technologies in detail. The demonstrators have also been used to map challenges that affect the development of enabling methods and technologies.

    Automated manufacturing of products with complex shapes can be simplified by dividing the process into two steps. Thin layers of prepreg are laid up on top of each other to form flat laminates that are formed to the desired shape in subsequent forming operations. The key methods and technologies required to automate such a system are methods and technologies for automated prepreg layup, the automated removal of backing paper and the forming of complex shapes. The main challenges are the low structural rigidity and tacky nature of prepreg materials, the extensive quality requirements in the aerospace industry and the need for the systems to handle a wide array of prepreg shapes.

    The demonstrators show that it is possible to automate the manufacturing of complexshaped products using automated layup and forming of prepreg laminates. Tests using the demonstrators indicate that it is possible to meet the quality requirements that apply to manual manufacturing of similar products.

  • 8.
    Björnsson, Andreas
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Enabling Automation of Composite Manufacturing through the Use of Off-The-Shelf Solutions2014Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Composite materials offer an appealing combination of low weight and high strength that is especially sought after in high-performance applications. The use of composite materials has and is continuing to increase, and the use of the material has been shown to provide substantial weight savings in for example aircraft design. With an increased use of composite materials follows an increased demand for cost-efficient manufacturing methods.

    Composite products are in many cases manufactured either by manual operations or by the use of complex automated solutions associated with high investment costs. The objective for this research is to explore an approach to develop automated composite manufacturing based on commercially available off-the-shelf solutions as an alternative to the existing automated solutions for composite manufacturing.

    The research, which was carried out in collaboration with industrial partners within the aerospace sector, is based on a demonstrator-centered research approach. Three conceptual demonstrators, focusing on three different manufacturing methods and a number of physical demonstrators, are used to show that off-the-shelf solutions can be used for automated manufacturing of composite products.

    Two aspects that affect if it is possible to use off-the-shelf solutions for automated composite manufacturing are the rigorous quality standards used by the aerospace industry and the great variety in product properties and material properties that is associated with composite manufacturing.

    The advantages in using off-the-shelf solutions has shown to be that the solutions generally are associated with low investments and that published information about the solutions, and the solutions themselves, is generally available for evaluation and testing. When working with the demonstrators it has been shown to be useful to break down a manufacturing system into basic tasks and consider off-the-shelf solutions for each particular task. This approach facilitates the search for a suitable off-the-shelf solution to solve a particular task. However, each of the separate tasks can affect other areas of the manufacturing system, and an overall systems perspective is required to find solutions that are compatible with the entire manufacturing system.

  • 9.
    Björnsson, Andreas
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Composite Manufacturing: How Improvement Work Might Lead to Renewed Product Validation2012Inngår i: Proceedings of the 5th International Swedish Production Symposium / [ed] Mats Björkman, 2012, s. 505-513Konferansepaper (Fagfellevurdert)
    Abstract [en]

    High-performance polymer composites are mainly used in applications where the benefits of high strength and low weight justify the high material and manufacturing costs. Many of these applications are found today in the aerospace, space and defense industries. Most of today’s commonly used manufacturing methods within this area are highly labor intensive. Furthermore, the quality requirements from the customers require a high level of process control. The purpose of this paper is to explore how changes that are introduced in order to improve productivity in a manufacturing system are managed, particularly with regard to who takes the decision to implement a change and how a change is validated. The study is based on qualitative interviews performed at several companies that manufacture composite components for the aerospace, space and defense sectors. The findings show that the responsibility for deciding to implement a change and the need for validating it are based on many diverse and interconnected factors. Therefore, it is difficult to construct guidelines for early assessment of the scope and cost of a proposed change. Hence each individual change request must be evaluated on its own. The study also shows that the validation process can be adapted to a level that is based on the type of change. In addition, it highlights that control over process parameters in manufacturing is essential.

  • 10.
    Björnsson, Andreas
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Alexandersson, Dan
    GKN Aerospace Applied Composites AB.
    Three-Dimensional Ultrasonic Cutting of RTM-Preforms – A Part of a High Volume Production System2013Inngår i: Proceedings of the 19th International Conference on Composite Materials, 28th July - 2nd August 2013, Montreal, Canada: Composite Materials:The Great Advance / [ed] Suong Van Hoa & Pascal Hubert, Electronic Publishing BytePress.com , 2013, s. 8960-8969Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The process parameters for an automated, three-dimensional ultrasonic cutting process of RTM-preforms are examined in order to find how they affect the cutting quality.

  • 11.
    Björnsson, Andreas
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Thuswaldner, Michael
    RUAG Space AB, Linköping, Sweden.
    Automated Composite Manufacturing Using Off-the-shelf Automation Equipment – A Case from the Space Industry2014Inngår i: Proceedings of the 16th European Conference on Composite Materials, 22nd-26th June 2014, Seville, Spain, 2014Konferansepaper (Fagfellevurdert)
    Abstract [en]

    A novel approach to the manufacturing of composite products using off-the-shelf automation equipment is explored in this article. A manufacturing concept for a specific product is developed and analyzed, from a technical perspective, in order to find areas where off-the-shelf automation equipment can be used. The article also highlights areas where case-specific solutions need to be developed. In this particular case, off-the-shelf automation equipment can be used for most of the tasks that the manufacturing system needs to perform. The most challenging process is identified as the application of adhesive. The manufacturing concept described in the article shows that it is possible to build a system for the manufacturing of composite components using a high degree of off-the-shelf automation equipment.

  • 12.
    Björnsson, Andreas
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Jonsson, Marie
    Swerea Sicomp, Compraser Labs, Bröderna Ugglas Gata hus 208B, 58188 Linköping, Sweden.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Automated material handling in compostie manufacturing using pick-and-place systems - a review2018Inngår i: Robotics and Computer-Integrated Manufacturing, ISSN 0736-5845, E-ISSN 1879-2537, Vol. 51, s. 222-229Artikkel, forskningsoversikt (Fagfellevurdert)
    Abstract [en]

    With increasing use of fiber reinforced polymer composites follows a natural pursuit for more rational and effective manufacturing. Robotic pick-and-place systems can be used to automate handling of a multitude of materials used in the manufacturing of composite parts. There are systems developed for automated layup of prepreg, dry fibers and thermoplastic blanks as well as to handle auxiliary materials used in manufacturing. The aim of this paper is to highlight the challenges associated with automated handling of these materials and to analyze the main design principles that have been employed for pick-and-place systems in terms of handling strategy, reconfigurability, gripping technology and distribution of gripping points etc. The review shows that it is hard to find generic solutions for automated material handling due to the great variety in material properties. Few cases of industrial applications in full-scale manufacturing could be identified.

  • 13.
    Björnsson, Andreas
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    Jonsson, Marie
    Swerea Sicomp, Compraser Labs.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion.
    Automation of Composite Manufacturing Using Off-the-shelf Solutions, Three Cases from the Aerospace Industry2015Inngår i: Proceedings of the 20th International Conference on Composite Materials, 2015Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    With an increased use of composite materials follows a need for rational, cost-efficient manufacturing processes. This paper explores how off-the-shelf solutions, developed for other purposes than composite manufacturing, can be used to build systems for automated composite manufacturing. Three demonstrators, each of them dealing with a specific type of material and all of them representing different manufacturing technologies for automated composite manufacturing, are presented and analyzed to find aspects that affect the ability to use off-the-shelf solutions. The three demonstrators target low to medium manufacturing volumes of complex products and they have been developed in collaboration with industrial partners within the aerospace industry. The conclusions drawn from the development of the demonstrators are that it is technically feasible to use off-the-shelf solutions in the three cases while adhering to the high quality standards of the industry. Furthermore three groups of aspects, quality aspects, product aspects and system aspects, which affect the ability to use off-the-shelf solutions for automated composite manufacturing, are identified.

  • 14.
    Björnsson, Andreas
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Jonsson, Marie
    Swerea SICOMP.
    Lindbäck, Jan Erik
    Saab Aerostructures.
    Åkermo, Malin
    Royal Institute of Technology, KTH, Aeronautical and Vehicle Engineering.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    Robot-Forming of Prepreg Stacks ‐ Development of Equipment and Methods2016Inngår i: Proceedings of the 17th European Conference on Composite Materials (ECCM17), 2016Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    Within the aerospace industry the manufacturing of composite components with complex shapes, such as spars, ribs and beams are often manufactured using manual layup and forming of prepreg material. Automated processes for prepreg layup and efficient forming techniques like vacuum forming are sometimes difficult to employ to these type of products due to technical limitations. This paper describes the development of tools and the forming sequence needed to automate sequential forming of a complex shape using an industrial robot. Plane prepreg stacks are formed to the final shape using a dual-arm industrial robot equipped with rolling tools. Tests show that the developed tools and the employed sequence can be used to form stacks to the desired shape with acceptable quality.

  • 15.
    Björnsson, Andreas
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten. Linköpings Universitet.
    Lindbäck, Jan Erik
    Saab Aerostructures, Sweden.
    Eklund, Daniel
    Swerea Sicomp, Sweden.
    Jonsson, Marie
    Swerea Sicomp, Sweden.
    Low-cost Automation for Prepreg Handling - Two Cases from the Aerospace Industry2016Inngår i: SAE International Journal of Materials & Manufacturing, ISSN 1946-3979, E-ISSN 1946-3987, Vol. 9, nr 1, s. 68-74Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    With an increased use of composite materials within the aerospace industry follows a need for rational and cost-effective methods forcomposite manufacturing. Manual operations are still common for low to medium manufacturing volumes and complex products.Manual operations can for example be found in material handling, when picking prepreg plies from a cutter table and stacking them toform a plane laminate in preparation for a subsequent forming operation. Stacking operations of this kind often involves a greatnumber of different ply geometries and removal of backing paper and other protecting materials like plastic. In this paper two differentdemonstrator cells for automated picking of prepreg plies and stacking of plane laminates are presented. One demonstrator is utilizinga standard industrial robot and an advanced end-effector to handle the ply variants. The other demonstrator is using a dual arm robotwhich allow for simpler end-effector design. In combination with a previously developed system for automated removal of backingpapers both systems have shown to be capable of automatically picking prepreg plies from a plane surface and stack them to generate aflat multistack laminate. The dual arm approach has shown advantageous since it result in simpler end-effector design and a successivelay down sequence that result in good adhesion between the plies in the laminate.

  • 16.
    Björnsson, Andreas
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Lindbäck, Jan Erik
    Saab Aerostructures.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska högskolan.
    Automated Removal of Prepreg Backing Paper - A Sticky Problem2013Inngår i: Proceedings of the SAE 2013, Aerotech Congress and Exhibition, 24th-26th September 2013, Montreal,Canada, 2013Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Automated solutions for manufacturing composite products based on prepreg often imply Automatic Fiber Placement or Automatic Tape Laying. These systems are generally associated with huge investments. For certain manufacturing applications it is interesting to investigate alternatives to find simpler and less costly automation. One example of an automated system could be the use of a standard industrial robot to pick single prepreg plies from an automated cutting machine and stack them to form a plane laminate. This paper is based on a case illustrating a product from the aircraft manufacturing industry. The case will demonstrate a pick and place concept on a general level and illustrate challenges that must be solved. The challenge selected to be the main focus for this paper is an automated process for backing paper removal. A literature review of different gripping technologies reveals several interesting technologies, and the most promising are tested for backing paper removal. The tests show that an automated removal process can be designed by using standard vacuum grippers in combination with mechanical clamping grippers. In order to lift the backing paper with a vacuum gripper an initial separation between the backing paper and prepreg is needed. This separation is most easily mechanically induced by bending the material. The proposed solution for automatic backing paper removal can be integrated in a manufacturing cell for manufacturing of the studied product.

  • 17.
    Casper, Robert
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Addressing Today’s challenges in automotive remanufacturing2018Inngår i: Journal of Remanufacturing, ISSN 2210-4690Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Automotive remanufacturing companies are nowadays facing a wide range ofchallenges. Typical challenges from the point of view of suppliers, producers and customers.Several process steps are analysed and problem fields are dissected: From the core management,to disassembly and cleaning to machining and testing. The main fields of challengesanalysed in this paper are: the vagueness in respect of fiscal value, environmental regulationsand taxation of core parts, the important need for a continuing qualification of staff andengineers, an efficient core management, the adaption of pricing models and the competence tohandle the growing variety and complexity. The focus of this analysis lies on activities of theindependent after-market (IAM) for remanufactured products.

  • 18.
    Casper, Robert
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Reverse Logistic Transportation and Packaging Concepts in Automotive Remanufacturing2018Inngår i: Procedia Manufacturing, E-ISSN 2351-9789, Vol. 25, s. 154-160Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    A key process in a closed-loop supply chain is managing and challenging the transportation and packaging management. Strict environmental regulations in connection with transport of environmentally hazardous substances (e.g. oil) are offering a highcost-saving potential in connection with an optimised transportation and packaging concept. The aim of this case orientated paperis to provide the framework for the management of reverse flow of materials in automotive industry. The emphasis is placed onthe remanufacturing activities. To obtain and verify the necessary information for the above mentioned problems, differentmethods and techniques have been applied: 1) Relevant, available literature in connection with this matter was studied; 2) Dataand documents was requested directly by relevant market actors; 3) The clustered data was analysed and samples werehighlighted; and 4) The data was evaluated and recommended courses of action were given. The results show that the mainproblems appear in the area of forward and reverse logistics: Packaging concepts which do not protect the product in an optimalway (forward / reverse logistics). Moreover, packaging concepts which do not protect the environment against potential negativeinfluence of a used part (reverse logistics) A best practice for the transportation of engine components is given and evaluated: Anengine in a metal frame with oil-pan. Securely attached by bolts. Packed in plastic bag.

  • 19.
    Di Orio, Giovanni
    et al.
    Dept. of Electrotechnical Engineering CTS – UNINOVA, Portugal.
    Rocha, Andre
    Dept. of Electrotechnical Engineering CTS – UNINOVA, Portugal.
    Ribeiro, Luis
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Barata, Jose
    Dept. of Electrotechnical Engineering CTS – UNINOVA, Portugal.
    The PRIME Semantic Language: Plug and Produce in Standard- based Manufacturing Production Systems2015Inngår i: Proceedings of the Flexible Automation and Intelligent Manufacturing Conference, 2015Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    Nowadays manufacturing production systems are becoming more and more responsive in order to succeed in ahighly unstable environment. The capability of a production system to effectively and efficiently adapt and evolveto face the changing requirements – imposed by volatile and dynamic global markets – is a necessary conditionto enable manufacturing enterprises to be agile. Since the agility of a manufacturing enterprise is always limitedby the agility of its own building blocks than it needs to be spread over the whole enterprise including the operationand information technologies (OT/IT). Turning to production systems, one of the significant challenges isrepresented by the possibility to provide easy and rapid (re-)configuration of their internal components and/orprocesses. Innovative technologies and paradigms have been explored during the years that combined with theincreasing advancement in manufacturing technologies enable the implementation of the “plug and produce”paradigm. The “plug and produce” paradigm is the foundation of any agile production system, since to be agile itis inevitably required to reduce the installation and (re-)engineering activities time – changing/adapting the systemto new requirements – while promoting configuration rather than programming. Therefore, the “plug andproduce” paradigm is a necessary but not sufficient condition for implementing agile production systems. Modernproduction systems are typically known for their plethora of heterogeneous component/equipment. In this complexscenario, the implementation of the “plug and produce” paradigm implies the existence of a well-definedontological model to support components/equipment abstraction with the objective to allow interactions,collaboration and knowledge sharing between them. The PRIME semantic language specifies the semanticstructure for the knowledge models and overall system communication language.

  • 20.
    Dias-Ferreira, João
    et al.
    Production Engineering, The Royal Institute of Technology (KTH), Stockholm, Sweden.
    Ribeiro, Luis
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Akillioglu, Hakan
    Production Engineering, The Royal Institute of Technology (KTH), Stockholm, Sweden.
    Neves, Pedro
    Production Engineering, The Royal Institute of Technology (KTH), Stockholm, Sweden.
    Onori, Mauro
    Production Engineering, The Royal Institute of Technology (KTH), Stockholm, Sweden.
    BIOSOARM: a bio-inspired self-organising architecture for manufacturing cyber-physical shopfloors2018Inngår i: Journal of Intelligent Manufacturing, ISSN 0956-5515, E-ISSN 1572-8145, Vol. 29, nr 7, s. 1659-1682Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Biological collective systems have been an important source of inspiration for the design of production systems, due to their intrinsic characteristics. In this sense, several high level engineering design principles have been distilled and proposed on a wide number of reference system architectures for production systems. However, the application of bio-inspired concepts is often lost due to design and implementation choices or are simply used as heuristic approaches that solve specific hard optimization problems. This paper proposes a bio-inspired reference architecture for production systems, focused on highly dynamic environments, denominated BIO-inspired Self-Organising Architecture for Manufacturing (BIOSOARM). BIOSOARM aims to strictly adhere to bio-inspired principles. For this purpose, both shopfloor components and product parts are individualized and extended into the virtual environment as fully decoupled autonomous entities, where they interact and cooperate towards the emergence of a self-organising behaviour that leads to the emergence of the necessary production flows. BIOSOARM therefore introduces a fundamentally novel approach to production that decouples the system’s operation from eventual changes, uncertainty or even critical failures, while simultaneously ensures the performance levels and simplifies the deployment and reconfiguration procedures. BIOSOARM was tested into both flow-line and “job shop”-like scenarios to prove its applicability, robustness and performance, both under normal and highly dynamic conditions.

  • 21.
    Elfving, Sofi W.
    et al.
    Ericsson AB, Stockholm, Sweden.
    Lindahl, Mattias
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska fakulteten.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Ericsson – The History from Product to Solution Provider and Challenges and Opportunities in an Evolving Environment2015Inngår i: Procedia CIRP, ISSN 2212-8271, E-ISSN 2212-8271, Vol. 30, s. 239-244Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    An increasing number of Original Equipment Manufacturers (OEM) are realizing that their products, earlier the foundation of their success, no longer stand alone in satisfying customer requirements. Customers now demand integration of services and bundling as well as increased active participation of OEMs during the use phase. Ericsson, a Swedish multinational OEM of communications technology and services, is an example of such a company. The objective of this paper is to describe, compare and discuss Ericsson's journey from a product provider to a PSS provider, e.g. by comparison with other industry examples. Furthermore, the paper highlights future challenges and opportunities for instance regarding business models, trends and product design.

  • 22.
    Elo, Kristofer
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Automation in the Recycling Industry: Recycling of Plastic and Large Liquid Crystal Displays2013Licentiatavhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    In a world of growing population and increasing prosperity, the demand for new high-technology products is increasing together with the demand for rawmaterials. To be able to deal with the demand for new raw materials and the increasing amount of waste, the recycling industry needs to prepare itself to cope with these changes. If the waste can become the new raw materials, then the recycling industry has a bright future. The implementation of new ways to recycle products can be the solution to succeeding in this challenge.

    The objective of this research is to investigate, from a technical perspective, automation in the recycling industry. More specifically, the objective is to identify problems and solutions in the recycling of plastics and large liquid crystal displays in order to better cope with current recycling requirements.

    This research was inspired by the research methodologies of industry-aslaboratory, action research, experimental research and two concept development methods.

    The results related to the recycling of plastics come from a theoretical investigation of the possibilities for a plastic sorting facility. The investigation resulted in two concepts for recycling systems, implementable with today’s stateof-the-art technology and a more futuristic concept for sorting and separating the different plastics of interest. The systems are designed with standardised processes and are arranged in a flexible way to be able to manage with current industrial requirements.

    The results related to large liquid crystal displays include a clarification of the requirements for an automatic recycling plant, concept generation, and practical testing of different technologies. Two preferred processes for dismantle large liquid crystal displays are the circle saw and band saw. Additional results are the semi-automatic process structure to manage with current industrial requirements for large liquid crystal displays.

  • 23.
    Elo, Kristofer
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Automatic Dismantling Challenges in the Structural Design of LCD TVs2014Inngår i: Procedia CIRP, ISSN 2212-8271, E-ISSN 2212-8271, Vol. 15, s. 251-256Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Many liquid crystal display television sets (LCD TVs) end up in the waste stream today. The combination of hazardous materials such as mercury and liquid crystal, and the labor-intensive disassembly of LCD TVs, make the recycling process interesting to automate. However, since there are so many manufacturers the variation of LCD TVs is high, making automation a challenge. Todays most common automatic process utilizes shredders, resulting in degradation of recycled material and possible decontamination of machine equipment. This paper aims to investigate the challenges related to the structural design of LCD TVs for an automatic dismantling process for the recycling of LCD TVs. The challenges identified during the empirical study were related to the mixture of materials, inhomogeneous materials, thin design, separation of the different components and finding a suitable dismantling sequence without unnecessary removal of components.

  • 24.
    Elo, Kristofer
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Process concepts for semi-automatic dismantling of LCD televisions2014Inngår i: Procedia CIRP, ISSN 2212-8271, E-ISSN 2212-8271, Vol. 23, nr 2014, s. 270-275Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    There is a large variety of electrical and electronic equipment products, for example liquid crystal display television sets (LCD TVs), in the waste stream today. Many LCD TVs contain mercury, which is a challenge to treat at the recycling plants. Two current used processes to recycle LCD TVs are automated shredding and manual disassembly. This paper aims to present concepts for semi-automated dismantling processes for LCD TVs in order to achieve higher productivity and flexibility, and in turn increase the value of the recycled materials, improve the work environment for operators and remove mercury from the recycled materials. A literature review and two empirical studies were performed to be able to present a concept for dismantling direct illuminated LCD TVs. The process used a circular saw and/or a band saw to machine two cuts in LCD TVs to gain access to the mercury-containing cold cathode fluorescent lamps inside. This conceptual process is compared to the other processes found in the literature.

  • 25.
    Engbåge, Niklas
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    Flodell, Jakob
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    Effektivisering av layout i produktionshallen på ETP Transmission AB: Layoutoptimering2019Independent thesis Basic level (university diploma), 10,5 poäng / 16 hpOppgave
    Abstract [en]

    This bachelor thesis is made on behalf of ETP Transmission AB during spring2019 to develop and produce layouts that are optimized for future demands. The proposals of the layouts should consider aspects such as ergonomics, economics and efficiency.

    ETP:s products include casings and chucks. The production is located in Linköping, Sweden. In 2017 the company had 52 employees and the turnover was 110 million SEK. ETP:s vision for the production is to make it more efficient to be able to produce more. Therefore, they have decided to invest in the production hall by adding a lathe and three paternoster lifts. They also want to make space for two sanding machines. Because of the changes in the production hall, ETP needs a new layout to fulfill their new demands.

    The method “Systematic Layout Planning” has been used to develop different proposals of layouts. Together with theory from different types of productions has three different layout concepts created. These concepts have been analysed through an extensive SWOT analysis process. Based on ETP:s suggestion, only two concepts were focused on. The result includes two layouts, both of them are fulfilling ETP:s demands.

    The report describes the ideology “Lean”, with focus on the 5S tool. 5S is a tool that helps keep the workplace organized and maximize efficiency and effectiveness. The ideology Lean was used in the development of the concepts.

  • 26.
    Engkvist, Inga-Lill
    et al.
    Linköpings universitet, Institutionen för medicin och hälsa, Avdelningen för fysioterapi. Linköpings universitet, Medicinska fakulteten. KTH Royal Institute Technology, Sweden.
    Eklund, Jörgen
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling. Linköpings universitet, Tekniska högskolan. KTH Royal Institute Technology, Sweden.
    Krook, Joakim
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell miljöteknik. Linköpings universitet, Tekniska fakulteten.
    Björkman, Mats
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Perspectives on recycling centres and future developments2016Inngår i: Applied Ergonomics, ISSN 0003-6870, E-ISSN 1872-9126, Vol. 57, s. 17-27Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The overall aim of this paper is to draw combined, all-embracing conclusions based on a long-term multidisciplinary research programme on recycling centres in Sweden, focussing on working conditions, environment and system performance. A second aim is to give recommendations for their development of new and existing recycling centres and to discuss implications for the future design and organisation. Several opportunities for improvement of recycling centres were identified, such as design, layout, ease with which users could sort their waste, the work environment, conflicting needs and goals within the industry, and industrialisation. Combining all results from the research, which consisted of different disciplinary aspects, made it possible to analyse and elucidate their interrelations. Waste sorting quality was recognized as the most prominent improvement field in the recycling centre system. The research identified the importance of involving stakeholders with different perspectives when planning a recycling centre in order to get functionality and high performance. Practical proposals of how to plan and build recycling centres are given in a detailed checklist. (C) 2016 Elsevier Ltd. All rights reserved.

  • 27.
    Falconi, Valentina
    et al.
    Politecnico di Milano.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Colledani, Marcello
    Politecnico di Milano.
    Copani, Giacomo
    Institute of Industrial Technologies and Automation, CNR, Italy.
    Key success factors for implementing Upgrading Remanufacturing2017Inngår i: Proceedings of International Conference on Remanufacturing (ICoR-17), 2017, s. 33-46Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Increasing volume of waste in Europe, reduced availability of critical primary resources and new emerging trends towards “green” products push European manufacturers towards the implementation of ‘circular economy’. Product upgrading, i.e. the process of providing new functionalities to products through collection, disassembly/substitution and remanufacturing, could represent an effective solution to support the transition to circular economy. However, economic and environmental sustainability, legislation boundaries, industrial benefits and social impact of design for upgradability and upgrading remanufacturing are still debated in many sectors, and companies still perceive high risks in this transition.

     

    The aim of the paper is to clarify the key success factors for companies that have the willingness to include upgrading remanufacturing in their businesses. An emphasis is placed on how the application of new service-oriented business models for product upgrade and design for remanufacturing can support this implementation and bring high value-added to circular economy businesses.

     

    The methodology used to reach the aim of the paper was to map existing business approaches through a literature review focused on the existing upgrading strategies. Next, a study of real existing case studies of product upgrading was developed. Within this step, the identification of common success factors and a favourable scenario for the implementation of upgrading remanufacturing was conducted.

  • 28.
    Farid, Amro M.
    et al.
    Masdar Institute of Science & Technology, Masdar City, Abu Dhabi, UAE.
    Ribeiro, Luis
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    An Axiomatic Design of a Multi-Agent Reconfigurable Manufacturing System Architecture2014Inngår i: Proceedings of ICAD2014 The Eighth International Conference on Axiomatic Design Campus de Caparica – September 24-26, 2014 / [ed] António M. Gonçalves-Coelho, Miguel Cavique and António Mourão, 2014, s. 51-58Konferansepaper (Fagfellevurdert)
    Abstract [en]

    In recent years, the fields of reconfigurable manufacturing systems, holonic manufacturing systems, and multi-agent systems have made technological advances to support the ready reconfiguration of automated manufacturing systems.  While these technological advances have demonstrated robust operation and been qualitatively successful in achieving reconfigurability, their ultimate industrial adoption remains limited.  Amongst the barriers to adoption has been the relative absence of formal and quantitative multi-agent system design methodologies based upon reconfigurability measurement.  Hence, it is not clear 1.) the degree to which these designs have achieved their intended level of reconfigurability 2.) which systems are indeed quantitatively more reconfigurable and 3.) how these designs may overcome their design limitations to achieve greater reconfigurability in subsequent design iterations.  To our knowledge, this paper is the first multi-agent system reference architecture for reconfigurable manufacturing systems driven by a quantitative and formal design approach.  It is rooted in an established engineering design methodology called axiomatic design for large flexible engineering systems and draws upon design principles distilled from prior works on reconfigurability measurement.  The resulting architecture is written in terms of the mathematical description used in reconfigurability measurement which straightforwardly allows instantiation for system-specific application.

  • 29.
    Farid, Amro M.
    et al.
    Dartmouth Coll, NH 03755 USA; MIT, MA 02139 USA.
    Ribeiro, Luis
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    An Axiomatic Design of a Multiagent Reconfigurable Mechatronic System Architecture2015Inngår i: IEEE Transactions on Industrial Informatics, ISSN 1551-3203, E-ISSN 1941-0050, Vol. 11, nr 5, s. 1142-1155Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    In recent years, the fields of reconfigurable manufacturing systems, holonic manufacturing systems, and multiagent systems have made technological advances to support the ready reconfiguration of automated manufacturing systems. While these technological advances have demonstrated robust operation and been qualitatively successful in achieving reconfigurability, their ultimate industrial adoption remains limited. Among the barriers to adoption has been the relative absence of formal and quantitative multiagent system design methodologies based on reconfigurability measurement. Hence, it is not clear that the degree to which these designs have achieved their intended level of reconfigurability, which systems are indeed quantitatively more reconfigurable, and how these designs may overcome their design limitations to achieve greater reconfigurability in subsequent design iterations. To our knowledge, this paper is the first multiagent system reference architecture for reconfigurable manufacturing systems driven by a quantitative and formal design approach. It is rooted in an established engineering design methodology called axiomatic design for large flexible engineering systems and draws upon design principles distilled from prior works on reconfigurability measurement. The resulting architecture is written in terms of the mathematical description used in reconfigurability measurement, which straightforwardly allows instantiation for system-specific application.

  • 30.
    Ferreira, Joao Dias
    et al.
    Kungliga Tekniska Högskolan, Stockholm, Sweden.
    Ribeiro, Luis
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Akillioglu, Hakan
    Kungliga Tekniska Högskolan, Stockholm, Sweden.
    Neves, Pedro
    Kungliga Tekniska Högskolan, Stockholm, Sweden.
    Maffei, Antonio
    Kungliga Tekniska Högskolan, Stockholm, Sweden.
    Characterization of an Agile Bio-inspired Shop-Floor2014Inngår i: Proceedings2014 12th IEEE International Conference on Industrial Informatics (INDIN), Porto Alegre, RS, Brazil 27-30 July, 2014, IEEE conference proceedings, 2014, s. 404-410Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Sustainability is currently one of the biggest challenges and driver of manufacturing industry. Nevertheless, with the decrease of product life cycles, the consumption of raw materials as well as the obsolescence of production systems increases. In this sense, agile shop-floors that enact companies with the ability to quickly reconfigure their shop-floors by deploying or removing modules are the key for sustainable industrial development. This paper attempts to characterize an innovative approach that relies on bio-inspired concepts as the main control mechanism, in order to foster sustainability by attaining the necessary shop-flooragility. Furthermore an experimental setup is presented and the results are analysed, in order to understand the influence and impact of the main properties that characterize the approach towards the system performance.

  • 31.
    Fredriksson, Anna
    et al.
    Linköpings universitet, Institutionen för teknik och naturvetenskap, Kommunikations- och transportsystem. Linköpings universitet, Tekniska fakulteten.
    Malm, Anna
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten. Saab Aeronautics, Linköping, Sweden.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Maskinkonstruktion. Linköpings universitet, Tekniska fakulteten.
    What are the differences between related offset and outsourcing?: A case study of a related offset business at Saab2016Inngår i: International Journal of Technology Transfer and Commercialisation, ISSN 1470-6075, E-ISSN 1741-5284, Vol. 14, nr 2, s. 132-149Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Recently, offset contracts have become more complex. For the seller to carry through and review the effects and the demands of an offset contract, they need a framework.The paper identifies five main differences between outsourcing and related offset, which are translated into activities to be included in a suggested related offset framework. The paper is based on an in-depth case study of a related offset business at Saab, a Swedish military aircraft producer. The analysis compared the studied case with an existing outsourcing process identified in literature. The paper contributes by providing an overview of the activities taking place during a related offset process and showing the effect of the different hierarchical levels involved in the process on the efficiency of the fulfilment of the offset business. This paper is based on a single case study, and the suggested differences should be verified through further case studies.

  • 32.
    Fuglås, Jonas
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    Lindgren, Amund
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Logistik- och kvalitetsutveckling.
    Digitalization strategy for Scania Cab Assembly2018Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [en]

    With changing market demands such as individualization, volatility and sustainability, the current manufacturing environment at Scania is subject to an increasing need for change. This, together with the availability of more advanced technology and digitalization has sparked the fourth industrial revolution. It has been named Industry 4.0 and considers digitalization in a manufacturing environment. As a result, the purpose of this thesis is to outline the potential of increased digitalization for logistics and manufacturing at Scania Oskarshamn. This will be done by developing a digitalization strategy that encapsulates the core of Industry 4.0 and a roadmap to guide Scania in their development towards a future digitalized manufacturing environment. The study will consider two core functions of Industry 4.0 as the cornerstones of digitalization; consciousness and interoperability. Consciousness focuses on the level of digitalization within the system. With interoperability, integration throughout the whole supply chain and how it relates to the manufacturing environment. As a result, the study is separated into three main parts: Scania today, Scania 2030 and the gap in-between. For all three parts, three areas of focus will be the basis for the analysis. First, the level of digitalization will be analyzed. This is done in regards to the first core function, consciousness. Second, the level of process maturity will be analyzed. This is done in regards to the second core function, interoperability. Third, synergies between logistics and manufacturing will be analyzed. From the conducted analysis of the current state at Scania, the 2030 scenario and the gap inbetween, the digitalization strategy for Scania focuses on the two identified functions. Three key steps has been developed for each function.

  • 33.
    Gabela, Asmir
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Automatiserad monteringscell för tillverkning av adapterringar i kompositmaterial2013Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [sv]

    Detta examensarbete är en del av ett forskningsprojekt som är ett samarbete mellan RUAG Space och Linköpings Universitet. RUAG Space är ett företag inom rymdindustrin som tillverkar delar till satelliter och bärraketer. För detta examensarbete kommer enbart adapter - och separationssystemet att beröras. Vid en uppskjutning av satelliter är det viktigt att tänka på att vikten är så låg som möjligt. Därför ville företaget att en ny produkt skulle tas fram genom att använda kompositmaterial. Företaget tar fram komponenten medan examensarbetets fokus är tillverkningen av den.

    Produkten består av kolfiberformade laminatblock som limmas ihop för att skapa ett cirkelbågeformat segment. Eftersom flera block limmas ihop är det en tidskrävande tillverkningsprocess. Därför beslutade företaget att ett koncept för automatiserad monteringscell skulle kunna tas fram. Då examensarbetet är tidsbestämt angås det att ett virtuellt automatiserat monteringskoncept skulle räcka.

    I detta examensarbete har ett stort fokus lagts på konceptgenereringen som har tillämpats för att hitta lämpliga koncept för problemet. Konceptgenereringen delades i tre huvudfunktioner som var robot, fixtur-och limapplicering samt gripdon. Det visade sig att konstruktionen av fixturen som gjordes parallellt med limappliceringen var examensarbetes viktigaste del. Därför lades stor del av examensarbetes tid åt att framta lämplig fixtur - och limningskoncept. För att kunna avgöra vilket fixturkoncept som är mest lämplig användes en konceptvalsmetod.

    När ett fixturkoncept och dess limapplicering hade valts kunde resterande funktioner väljas utifrån fixturenskoncepts geometri och funktion. Det påvisades att en 6 axlar robot var den mest lämpade för monteringscellen medan det mest lämpade gripdonet var klämmande. Efter att alla huvudfunktioner hade valts kunde en processlayout tas fram som sedan användes som stöd vid programmering av roboten. Geometrisimuleringen består av att roboten hämtar blocken som sedan går igenom olika mellanliggande stationer innan det placeras i fixturkonceptet. Processen avslutas med en liminjicering i fixturen.

    Det har visat sig att det lättaste sättet att utforma ett segment har varit genom att fixturkonceptet har en cirkelbågeformad geometri. Den slutgiltiga geometrisimuleringen visade att det går att automatisera monteringscellen.

  • 34.
    Hochwallner, Martin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    On Motion Control of Linear Incremental Hydraulic Actuators2017Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Linear Incremental Hydraulic Actuators combine one or more short-stroke cylinders, and two or more engaging/disengaging mechanisms into one actuator with long, medium, or even unlimited stroke length. The motion of each single short-stroke actuator concatenated by the engaging/disengaging mechanisms forms the motion of the linear incremental hydraulic actuator.

    The patterns of how these motions are concatenated form the gaits of a specific linear incremental hydraulic actuator. Linear incremental hydraulic actuators may have more than one gait. In an application, the gaits may be combined to achieve optimal performance at various operating points.

    The distinguishing characteristic of linear incremental hydraulic actuators is the incremental motion. The term incremental actuator is seen as analogous to the incremental versus absolute position sensor. Incremental actuators realize naturally relative positioning. Incremental motion means also that the behavior does not depend on an absolute position but only on the relative position within a cycle or step.

    Incremental actuators may realize discrete incremental or continuous incremental motion. Discrete incremental actuators can only approach discrete positions, whereby stepper drives are one prominent example. In contrast, continuous incremental actuators may approach any position. Linear electric motors are one example of continuous incremental actuators. The actuator has no inherent limitation in stroke length, as every step or cycle adds only to the state at the beginning of the step or cycle and does not depend on the absolute position. This led to the alternative working title Hydraulic Infinite Linear Actuator.

    Linear incremental hydraulic actuator provides long stroke, high force, and linear motion and has the potential to

    • decrease the necessary resource usage,
    • minimize environmental impact, e.g. from potential oil spillage,
    • extend the range of feasible products: longer, stiffer, better, etc.

    This thesis presents an analysis of the characteristics and properties of linear incremental hydraulic actuators as well as the gaits and possible realizations of some gaits. The gait for continuous, smooth motion with two cylinders is comprehensively studied and a control concept for the tracking problem is proposed. The control concept encapsulates the complexity of the linear incremental hydraulic actuator so that an application does not have to deal with it. One other gait, the ballistic gait, which realizes fast, energy-efficient motion, enabling energy recuperation is studied.

  • 35.
    Hochwallner, Martin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    The Gaits of Linear Incremental Hydraulic Actuators: Digital and mixed mode hydraulic/mechanical motion2019Inngår i: PROCEEDINGS The 10th Workshop on DIGITAL FLUID POWER: DFP19, Linz, 2019Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    Linear Incremental Hydraulic Actuators are a class of actuators consisting of one or more double-acting cylinders with are detachable from a common piston rod. The actuator works in a kind of rope-climbing motion. The cylinders engage to the rod, drive the load, disengage and retract. The various patterns, how these base actions of the realized cylinders are concatenated form the gaits of Linear Incremental Hydraulic Actuators. Depending on the gait the base actions are realized digital or continuous. For example, in the gait Smooth Motion engaging / disengaging is realized digital and the driving / retraction continuous. Other gaits may be realized fully digital. This contribution presents the concept of the Linear Incremental Hydraulic Actuator, an overview over various gaits, and how they can be combined to form advantages in applications. Advantages of Linear Incremental Hydraulic Actuators are or may be lower resource utilization and environmental impact, applicable for long or even infinite stroke, and simple integration.

  • 36.
    Hochwallner, Martin
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system. Linköpings universitet, Tekniska fakulteten. Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    Pinto, Lie
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling. Linköpings universitet, Tekniska fakulteten.
    Krus, Petter
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Fluida och mekatroniska system. Linköpings universitet, Tekniska fakulteten.
    Tracking Control for High-Performance Motion of a Hydraulic Infinite Linear Actuator2018Inngår i: IEEE/ASME transactions on mechatronics, ISSN 1083-4435, E-ISSN 1941-014X, Vol. 23, nr 6, s. 2782-2793Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    The concept of the hydraulic infinite linear actuator consists of two double-acting cylinders with hydraulically detachable pistons driving a common rod. Alternatingly, one cylinder engages and drives the load, whereas the other retracts; the actuator, thus, works in a kind of rope-climbing motion. The actuator has three degrees of freedom, which are temporarily coupled compared with one in a conventional cylinder. Hence, the actuator is a hybrid system with both continuous and discrete states and control inputs. This paper presents a tracking control problem and a solution for high-performance motion, which is interpreted as utilizing the hardware limits in the sense of velocity, accuracy, smoothness, and usability. The concept is demonstrated by simulation for the case of a rest-to-rest motion, but the intended use cases also include arbitrary trajectories.

  • 37.
    Jensen, Jonas
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    Nilsson, Sara
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    DFM/A-metod för integrerade strukturdelar i kolfiberkomposit: Vidareutveckling av metodik för SAAB Aerostructures2015Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [sv]

    Kolfiberkompositer är ett av de materialsom utvecklas snabbast just nu. Analogt med att materialet blir billigare och börjar användas i större utsträckning av flygindustrin utvecklas också tillverkningsmetoder för att följa framstegen. Hur material och tillverkningsmetoder sätter krav och påverkar en produkts utformning och prestanda kan vara svårt att definiera. I detta examensarbete har en Design for Manufacturing och Assembly (DFM/A)-metod utvecklats för att under hela produktutvecklingsprocessen kunna ta hänsyn till produktionsaspekter. DFM/Ametoden är framtagen åt Saab Aerostructures med hänsyn till de material som används, deras existerande produktionsprocesser och den produktutvecklingsprocess som finns på företaget. Utifrån litteratur- och fallstudier har en DFM/A-metod som kallas Metod 2015 (M2015) utvecklats. Metoden innehåller en arbetsprocess, konstruktionsriktlinjer samt stödjande DFM/Averktyg. Genom att i hela utvecklingsprocessen ta hänsyn till produktionsaspekter är detta arbetssätt anpassat för att underlätta utveckling av kolfiberkompositkomponenter på Saab. Utöver själva metoden i sig finns allt material som behövs för användning av M2015 sammanställt i en manual som i första hand riktar sig till konstruktören. Genom att skapa en bättre förståelse för produktionsaspekterna hos en konstruktion och tillhandahålla rätt verktyg kan DFM/A-metoden bidra till flera positiva effekter. Användandet av M2015 bör leda till produkter av kolfiberkomposit som är lättare att tillverka vilket i sin tur också bör minska onödiga kostnader, ge högre kvalitet och kortare ledtider. Införandet ställer dock också krav på Saab för att dessa målsättningar ska kunna uppnås.

  • 38.
    Johansson, Glenn
    et al.
    Jonköping University, Sweden; Malardalen University, Sweden.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Lean and green product development: two sides of the same coin?2014Inngår i: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 85, s. 104-121Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    This paper compares and contrasts the lean product development (LPD) and green product development (GPD) concepts through a systematic literature review including 102 journal publications. The review resulted in 14 findings that were organised according to four dimensions: general, process, people and tools/techniques. A number of similarities between the concepts were found. For example, implementation of both concepts calls for a systems perspective where the dimensions of process-people-tools/techniques are linked holistically. Differences between the LPD and GPD concepts lie in: their goal and focus, value construct, process structure, performance metrics, and tools/techniques used. The findings do not unambiguously support that "green thinking is thinking lean" and consequently it cannot be argued that LPD and GPD are two sides of the same coin, meaning that LPD automatically leads to greener products or that GPD ensures improvements and efficiency in the product development process. However, it is reasonable to conclude that LPD and GPD belong to the same "currency". That is, the concepts share a number of similarities that indicate a synergistic relationship. This synergistic relationship has been accentuated by a nine propositions where the potential for cross-field learning is shown.

  • 39.
    Johansson, Ricard
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Monteringsinstruktioner: innehåll, framtagning och presentation2014Independent thesis Advanced level (degree of Master (Two Years)), 20 poäng / 30 hpOppgave
    Abstract [sv]

    Instruktioner har syftet att förmedla ett arbetssätt eller utförande av en uppgift som användaren sen tidigare inte är bekant med. För att instruktionen ska vara framgångsrik krävs dock att den utformas på ett sätt som gör den enkel att använda och att tolka korrekt. Större efterfrågan på kundanpassning och krav på flexibilitet gör att tillverkande företag i allt större omfattning behöver effektiva metoder för att ta fram instruktioner.

    På uppdrag av PartnerTech i Åtvidaberg genomfördes under vårterminen 2014 ett examensarbete inriktat mot att underlätta framtagning och revision av instruktioner. Vilka presentationsformer som bäst stödjer användaren var också del av det huvudsakliga målet. Utöver det önskades även en metod för att kategorisera produkter efter monteringskomplexitet, vilket skulle underlätta fördelning av personal. PartnerTech är en kontraktstillverkare som ständigt ställs inför nya produkter och produktionsscenarion, vilket medför löpande behov av nya instruktioner. Bakgrunden till initiativet för projektet ligger i att den nuvarande metoden inte upplevs som tillräckligt effektiv och att kunskap från vetenskapliga studier saknas.

    Examensarbetet har utförts av en student vid det maskintekniska programmet på Linköpings tekniska högskola. Projektet inleddes med en studie av nuläget och forskningsresultaten inom de berörda områdena. Därefter utvärderades mjukvaran SolidWorks Composer för att se vilka fördelar den skulle kunna bidra till, jämfört med det nuvarande arbetssättet. Ett förslag till en layout för en alternativ form av instruktion utarbetades utifrån fynden under litteraturstudien, vilken senare testades på verkliga produkter. Parallellt utvecklades en metod för att kategorisera produkterna som produceras i Åtvidaberg.

    Projektet resulterade i en alternativ layout för instruktionerna och ett förslag till ny presentationsmetod. Som framtagningsverktyg föreslås Microsoft Powerpoint, vilket använts under projektet och visat på flera fördelar mot nuvarande program. Istället för att som idag använda utskrivna papperskopior av instruktionerna föreslås presentation via bildskärmar i form av ett bildspel. Utvärderingen av SolidWorks Composer visade att det finns potential för att effektivisera framtagningen av bilder för instruktionerna, förutsatt att ett antal kriterier uppfylls. Metoden för kategorisering av produkterna resulterade i en checklista, baserad i huvudsak på ja/nej-frågor.

  • 40.
    Jonsson, Marie
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    On Manufacturing Technology as an Enabler of Flexibility: Affordable Reconfigurable Tooling and Force-Controlled Robotics2013Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    In order to survive in today’s global market many manufacturing companies seek flexibility to reduce product lead times and meet changing market demands. Manufacturing equipment forms the base of the production system and manufacturing technology with the capability to adapt to any changes in prerequisites is thus a key enabler of flexibility. Industrial robots and fixtures are common in all types of manufacturing. Robots are versatile re-programmable units capable of performing many tasks, such as welding, part transfer, etc. Industrial robots have traditionally been unable to handle disturbances and lack of constraints of input. This has led to manual operations often being preferred to automation when some level of flexibility is needed. One way to enhance manufacturing equipment’s capability to handle unknown events is to integrate different kinds of sensors to gain more knowledge of the manufacturing environment. Force sensors, for example, can be used to close the feedback loop and, together with an adequate control system, enable the robot to react to force stimuli. This is useful in manufacturing applications like assembly and deburring, which have previously been difficult to automate.

    Fixtures are devices that hold and position parts during a manufacturing process. Traditionally many fixtures have been dedicated, i.e. designed for a specific part and purpose. This means that fixtures have not been able to handle different products in the same unit, thus hindering flexibility. Sensors, like measurement systems, can be used together with fixtures to de-couple the structure of the fixture from the accuracy, which is the traditional approach to fixturing. This reasoning forms the base of the Affordable Reconfigurable Tooling (ART) concept, developed at Linköping University. The ART concept aims at increasing flexibility in manufacturing, while ensuring affordability and efficiency.

    This thesis explores how common manufacturing equipment, like industrial robots and fixtures, combined with sensor input, can enhance flexibility in manufacturing. The research shows that force-controlled robots, reacting to force stimuli, produce consistent results in assembly of compliant structures and in complex deburring. Force control also makes the system more robust, as it is able to handle variance in the assembled and deburred parts which adds to system flexibility. It also lessens the need for accuracy in other equipment used, such as grippers and fixtures, and makes programming easier and safer. Force control would, however, benefit if parameter tuning was simplified in order to fit an industrial environment and if presented user information is tailored for the intended user.

    Using measurement sensors to build fixtures, new ART devices aimed at increased flexibility in fixtures have been developed. These devices reduce the resources needed for fixture build and reconfiguring between products and also open up for making fixtures more active in manufacturing and similar to robots, while still being affordable. ART also reduces resources needed for design, as shown by the developed design aid programs. ART also supports concurrent design, as fixture specifications may be finalized before the product specifications are fully set.

    The overall results indicate that the explored sensors in combination with today’s emerging technologies can give additional benefits for applications like assembly and deburring and for fixtures. Furthermore, it is shown that it is possible to increase flexibility on different levels in a manufacturing system by using sensors in combination with industrial robots and fixtures.

  • 41.
    Jonsson, Marie
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Johansen, Kerstin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    On emerging manufacturing technology as enablers of LeanManuskript (preprint) (Annet vitenskapelig)
    Abstract [en]

    Purpose - This paper discusses the impact of emerging automation technologies on the reduction of waste/muda in Lean manufacturing. Two industrial cases are used to highlight the increasing complexity of investment decisions and technology management.

    Design/methodology/approach - The 7 wastes are mapped along with their drivers in an automated manufacturing cell. Using two industrial cases; non-contact robotized scanning of car structures and force control de-burring, as illustrative examples their impact on drivers and waste reduction is established.

    Findings - Emerging technology has a high potential for reducing waste, not only on a cell level but also up-, and downstream the actual manufacturing process, for example on programming efforts. However, this increases the complexity of how technology impacts waste, and to what extent and scope.

    Research limitations/implications - New models for planning of manufacturing cells have to be researched that consider the possible impact of technology solutions to a wide aspect of the manufacturing organization.

    Practical implications - The identified drivers of waste in automation along with the presented waste reducers can be used by industry practitioners as a tool to evaluate and design manufacturing cells.

    Originality/value - This paper links new automation technologies with the waste concept and discusses the issues of increasing complexity in manufacturing, which is valuable for researchers and practitioners in technology management. It also lists drivers and summarizes possible technical solutions for waste reduction.

  • 42.
    Jonsson, Marie
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Murray, Tom
    Airbus UK, United Kingdom.
    Kihlman, Henrik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling. Linköpings universitet, Tekniska högskolan.
    Development of an automated reconfigurable device for affordable fixturing2011Inngår i: Proceedings of the 21st International Conference on Production Research (ICPR2011), 31st July - 4th August, Stuttgart, Germany / [ed] D. Spath, R Ilg and T. Krause, 2011Konferansepaper (Annet vitenskapelig)
    Abstract [en]

    Fixtures are used in manufacturing to hold and position products or workpieces. Linköping University has over a period of several years developed an approach to flexible fixturing that relies on an outer measuring system to ensure accuracy rather than the more common approaches of high internal accuracy or a built-in chain of tolerances. The Linköping system fuses modularity, a rebuildable framework, with reconfigurability, through the means of adjustable devices. To address the need for speed in reconfiguration an automated approach has been developed as a proof-ofconcept. The system consists of electrical motors attached to the legs of the Flexapod 6, a PC, controller cards and an external measuring system. The measuring system feeds information to the PC that is utilized to calculate desired leg length using a Visual Basic program that communicates with CATIA V5. This program then sets signals to the motor controller cards which run the actuators. Due to the motors used the accuracy achieved are in the range of +/-0.15 mm but this may be enhanced with other types of motors developed for higher strengthrather than speed. The system can be further developed by having the actuators as the actual legs of the Flexapod, making it a cheaper Hexapod robot. The paper presents the automated Flexapod 6 in the current system along with possible further development.

  • 43.
    Jonsson, Marie
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Stolt, Andreas
    Lund University, Sweden.
    Murray, Tom
    Airbus UK, United Kingdom.
    Nilsson, Klas
    Lund University, Sweden.
    Force Controlled Assembly of a Compliant Rib2011Inngår i: Proceedings of SEA AeroTech Congress and Exhibition 2011, 18th-21st October, Toulouse, France, 2011Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Automation in aerospace industry is often in the form of dedicated solutions and focused on processes like drilling, riveting etc. The common industrial robot has due to limitations in positional accuracy and stiffness often been unsuitable for aerospace manufacturing. One major cost driver in aircraft manufacturing is manual assembly and the bespoke tooling needed. Assembly tasks frequently involve setting relations between parts rather than a global need for accuracy. This makes assembly a suitable process for the use of force control. With force control a robot equipped with needed software and hardware, searches for desired force rather than for a position. To test the usefulness of force control for aircraft assembly an experimental case aligning a compliant rib to multiple surfaces was designed and executed. The system used consisted of a standard ABB robot and an open controller and the assembly sequence was made up of several steps in order to achieve final position. The result shows that the process is robust and repetitive and has the potential to reduce the need for bespoke jigs and fixtures.

  • 44.
    Jonsson, Marie
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Stolt, Andreas
    Department of Automatic Control, Lund University, Lund, Sweden .
    Robertsson, Anders
    Department of Automatic Control, Lund University, Lund, Sweden .
    von Gegerfelt, Sebastian
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska högskolan.
    Nilsson, Klas
    Department of Computer Science, Lund University, Lund, Sweden.
    On force control for assembly and deburring of castings2013Inngår i: Production Engineering, ISSN 0944-6524, Vol. 7, nr 4, s. 351-360Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Traditional industrial robots have problems interacting with an uncalibrated, ill-dened environment where part geometry and position may vary. Active force control technology has therefore been suggested as a solution to add the extra sensory dimension needed to handle manufacturing tasks like assembly and deburring. The technology is proposed to give increased exibility compared to other solutions and force control systems are available commercially. Active force control installations however, are is still uncommon in industry. This paper presents two cases of force control applications; assembly of a compliant carbon ber structure and deburring/cleaning of iron castings. Based on these two cases, some issues are raised on how the technology can be further developed to t the industrial setting, and the proposed benets are re-examined and refined. The two cases show that programming, parameter setting and ease of use are critical components in lowering the industrial threshold, together with increased possibilities of application-specic compensation and filtering. Force control does however, show great potential in increasing the boundaries for variance in product and equipment like grippers and xtures as well as decreasing the need for calibration of for example virtual models used for programming compared to traditional automated solutions.

  • 45.
    Karlsson, Filip
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    Förbättring av layout för kapningsstation på Blomberg & Stensson AB: Layoutoptimering och riskanalys2018Independent thesis Basic level (degree of Bachelor), 10,5 poäng / 16 hpOppgave
    Abstract [sv]

    Detta examensarbete har utförts som en del av högskolutbildningen Maskinteknik vid Linköpings universitet. Rapporten är skriven på uppdrag av Blomberg & Stensson AB i Katrineholm som ingår i en företagsgrupp med företaget X-modul samt Engströms Verkstäder. Företaget erbjuder produkter i stor variation som verktygsvagn, renhetsskåp, arbetsbänk och en flexibel barack som kan byggas som ett boende, fältsjukhus, toaletter med mera. Produktionen i Katrineholm består främst av plåt- och rörbearbetning.Blomberg & Stensson har på våren 2017 flyttat in i nya lokaler och ska därför optimera sina arbetsområden. Området som fokuseras i detta arbete är kapningsområdet där rör- och balkmaterial kapas. För närvarande finns det inget sätt att kapa material längre än sju meter vilket är grundproblemet i detta arbete, eftersom material måste kapas för hand innan den kan tas in i lokalen. Syftet är att skapa en ny layout för kapningsområdet, samt eliminera säkerhetsrisker, ergonomirisker, slöseririsker och miljörisker. Lösningsförslag ska presenteras på en ny layout samt lösningsförslag på åtgärder för eventuella risker som uppkommer.Genom en övergripande kartläggning av området och dess avgränsningar samt datainsamling genom intervjuer, observationer och litteraturstudier har förståelsen av kapningsproduktionen ökat. Tillgång till egen arbetsplats hos företaget har också varit betydande för arbetets resultat. Med närhet till produktionen och kunnig personal har lett till ett effektivare arbete och ökat förståelsen för arbetsprocessen.När kunskap hade samlats in analyserades området och lösningsförslag på layouts skapades. Layouten fokuseras på att utformas med Lean production, bra ergonomi och bra arbetsmiljö. Lösningsförslag skapades och gick igenom en process där de ansvariga på företaget fick säga sina åsikter och kritisera förslagen. Det tredje förslaget blev godkänt och bestämdes som den layout kapningsområdet skulle ha och en renovering tog fart. Under arbetsgången påpekades flertal gånger om att det behövdes ett koncept för att ta upp vätska som spills under rullbanorna. Ett lösningsförslag till detta skapades samtidigt som en riskanalys utfördes med ansvarig operatör när kapningsområdets design var bestämt.Resultatet presenterar layoutens design som gör det möjligt att kapa material på tolv meter vilket löser problemet. Dessutom presenterar den lösningsförslaget på problemet där vätska som spills samt resultatet från en framgångsrik riskanalys.I diskussionskapitlet har jämförelser före och efter arbetet på layouten och hur förändringarna har tillämpats på arbetsstationen dessutom har frågorna från syftet besvarats. I slutsatsen presenteras bidraget som detta arbete har gett.

  • 46.
    Karlsson Sundqvist, Therese
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    Källmar, Karin
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion.
    Integration of Environmental Aspects in Product Development Process and Ship Design: a LEAP towards environmental awareness at Kockums AB2012Independent thesis Advanced level (degree of Master (One Year)), 20 poäng / 30 hpOppgave
    Abstract [en]

    The Swedish company Kockums AB, at the forefront within maritime and naval technology, is in need of a tool, document, and/or method to include environmental aspects in their product development process. This is mainly because of additional requirements put on Kockums AB from their main customer. Ship recycling is the major issue that has to be addressed and included in Kockums AB’sworking procedures. Moreover, ship recycling is a pressing issue to handle due to horrible conditions in South Asian countries, where most ship dismantling is taking place. For these reasons, the objective of this M.Sc. thesis was to integrate environmental aspects in the product development process at Kockums AB by designing and proposing a way of implementing a tool, document, and/or method.

    Environmental product requirements that Kockums AB is demanded to fulfill mainly derives from customers, classification societies, laws and legislations, and themselves. The Hong Kong Convention has been adapted, in 2009, but is yet to enter into force. Ship recycling is covered by the convention,and an ‘Inventory of Hazardous Materials’ has to be provided from the ship builder, and hence this is the main aspect for Kockums AB to consider. Naval ships are, however, excluded from the Hong Kong Convention.

    Kockums AB does not have a routine on how to handle environmental requirements nor are environmental aspects included in their product development process. Consequently, Kockums AB’senvironmental ambition should not be put too high and rather aim at follow laws. In an empiricalstudy, regarding environmental aspects at Kockums AB, difficulties were identified. Lack of environmental knowledge, communication problems, and misunderstandings regarding the ambiguous term environment showed to be most notable. The three most prominent success factors for asuccessful integration of ecodesign, from the conducted literature review and empirical findings, are education for employees, existence of an environmental champion, and top management support.

    A Long-term Environmental Action Plan (LEAP), which took the success factors into account and contains 18 Actions, was developed for Kockums AB, and is the ultimate result of this research. The LEAP was developed in accordance with ISO 14006, a new standard for incorporation of ecodesign in Environmental Management Systems, with the aim of reducing adverse environmental impactsthroughout a product’s lifecycle. Moreover, the proposed way of implementing the LEAP was based on a ”Plan, Do, Check, Act” methodology from Product-Oriented Environmental Management Systems (POEMS). POEMS focus on a product’s environmental efficiency throughout its lifecycle, by a systematic integration of ecodesign in the company’s strategies and practices, and hence continual improvements. This way of implementation should be familiar to Kockums AB because the company is certified according to ISO 14001, where continual improvement of environmental performance is a key factor.

    The proposed LEAP includes tools, documents, and methods that are to be used in daily work and product development at Kockums AB. It is a step towards environmentally conscious design and enhanced environmental knowledge at Kockums AB. Additionally, as a result of the LEAP, the expectation is that environmental conscious mindsets of employees arise.

  • 47.
    Karnouskos, Stamatis
    et al.
    SAP, Germany.
    Sinha, Roopak
    Auckland Univ Technol, New Zealand.
    Leitao, Paulo
    Inst Politecn Braganca, Portugal.
    Ribeiro, Luis
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Strasser, Thomas. I.
    Vienna Univ Technol, Austria.
    Assessing the Integration of Software Agents and Industrial Automation Systems with ISO/IEC 250102018Inngår i: 2018 IEEE 16TH INTERNATIONAL CONFERENCE ON INDUSTRIAL INFORMATICS (INDIN), IEEE , 2018, s. 61-66Konferansepaper (Fagfellevurdert)
    Abstract [en]

    Agent-technologies have been used for higher-level decision making in addition to carrying out lower-level automation and control functions in industrial systems. Recent research has identified a number of architectural patterns for the use of agents in industrial automation systems but these practices vary in several ways, including how closely agents are coupled with physical systems and their control functions. Such practices may play a pivotal role in the Cyber-Physical System integration and interaction. Hence, there is a clear need for a common set of criteria for assessing available practices and identifying a best-fit practice for a given industrial use case. Unfortunately, no such common criteria exist currently. This work proposes an assessment criteria approach as well as a methodology to enable the use case based selection of a best practice for integrating agents and industrial systems. The software product quality model proposed by the ISO/IEC 25010 family of standards is used as starting point and is put in the industrial automation context. Subsequently, the proposed methodology is applied, and a survey of experts in the domain is carried out, in order to reveal some insights on the key characteristics of the subject matter.

  • 48.
    Kurilova, Jelena
    et al.
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Sundin, Erik
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Poksinska, Bozena
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Logistik- och kvalitetsutveckling. Linköpings universitet, Tekniska fakulteten.
    Remanufacturing challenges and possible lean improvements2018Inngår i: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 172, s. 3225-3236Artikkel i tidsskrift (Fagfellevurdert)
    Abstract [en]

    Remanufacturing is a viable way to prolong the useful life of an end-of-use product or its parts. Despite its economic, environmental, and social benefits, remanufacturing is associated with many challenges related to core (used product or its part) availability, timing and quality. The aim of this paper is to study how lean production could be used to tackle remanufacturing process challenges and contribute to shorter lead times. To meet this aim, we conducted a literature review and case studies of four remanufacturing companies. The case companies remanufacturing challenges were: (1) a lack of material requirements planning system, (2) poor core information, (3) a lack of core material, (4) poor spare parts information, (5) a lack of spare parts material, (6) insufficient quality management practices, (7) large inventories, (8) stochastic remanufacturing processes, (9) a lack of supply-demand balance, and (10) insufficient automation. These challenges contribute to long and variable remanufacturing process lead times. To tackle remanufacturing challenges, seven lean-based improvements with a major effect on improvements in lead time were suggested: standard operations, continuous flow, Kanban, teamwork, employee cross-training, layout for continuous flow, and supplier partnership. Providing that the suggested improvements are implemented, a possible lead time reduction of 83-99 per cent was projected. 

    Fulltekst tilgjengelig fra 2019-11-09 13:11
  • 49.
    Kurilova-Palisaitiene, Jelena
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Lean Remanufacturing: addressing system challenges2015Inngår i: Proceedings of the 9th International Symposium on Environmental Conscious Design and Inverse Manufacturing (Eco-Design -15), 2015Konferansepaper (Fagfellevurdert)
    Abstract [en]

    The aim with remanufacturing is emphasized through delivering same or better than original product quality and prolonging physical product performance. However, remanufacturing faces challenges related to complex material and information flows. Therefore in order to sustain competitive some remanufacturers investigate opportunity to improve through lean production.

    The aim with this paper is to define remanufacturing challenges from a system perspective and investigate how these challenges can be addressed by lean production principles. Data is collected via focus group interviews at three remanufacturing companies. In addition, a literature study on lean principles and practices to deal with the identified challenges was conducted.

    The lean principles in remanufacturing: value, value stream, flow, pull and perfection are described and five remanufacturing system challenges: uncertainty, complexity, variability, inflexibility, lean waste were defined. As a result, a generic lean approach to deal with remanufacturing system challenges is developed with a focus on pull-based remanufacturing.

  • 50.
    Kurilova-Palisaitiene, Jelena
    Linköpings universitet, Institutionen för ekonomisk och industriell utveckling, Industriell Produktion. Linköpings universitet, Tekniska fakulteten.
    Lean Remanufacturing: Reducing Process Lead Time2018Doktoravhandling, med artikler (Annet vitenskapelig)
    Abstract [en]

    Remanufacturing is a product recovery option in which used products are brought back into useful life. While the remanufacturing industry stretches from heavy machinery to automotive parts, furniture, and IT sectors, it faces challenges. A majority of these challenges originate from the remanufacturing characteristics of having little control over the core (the used product or its part), high product variation, low product volumes, and a high proportion of manual work, when compared to manufacturing. Some remanufacturing challenges appear to be process challenges that prolong process lead time, making remanufacturing process inefficient.

    Lean is an improvement strategy with roots in the manufacturing industry. Lean helps to increase customer satisfaction, reduce costs, and improve company’s performance in delivery, quality, inventory, morale, safety, and other areas. Lean encompasses principles, tools and practices to deal with e.g. inefficient processes and long process lead times. Therefore, in this thesis lean has been selected as an improvement strategy to deal with long remanufacturing process lead times.

    The objective of this thesis is to expand knowledge on how lean can reduce remanufacturing process lead time. This objective is approached through literature studies and a case study conducted at four remanufacturing companies. There are five challenges that contribute to long process lead time: unpredictable core quality, quantity, and timing; weak collaboration, information exchange, and miscommunication; high inventory levels; unknown number of required operations in process and process sequence; and insufficient employee skills for process and product upgrade. When analysing the case companies’ process lead times it was found that there is a need to reduce waiting times, which account for 95 to 99 per cent of process lead times at three of the four companies.

    To improve remanufacturing process efficiency and reduce remanufacturing process lead time six lean practices are suggested: product families; kanban; layout for continuous flow; cross functional teams; standard operating procedures; and supplier partnerships. The suggested lean practices have a key focus on reducing waiting time since it prolongs the process lead time. This thesis contributes to lean remanufacturing research with the case study findings on lean practices to reduce remanufacturing process lead time and increase process efficiency.

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