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Digital models of manufacturing: with emphasis on titanium welding for early product development
Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.
Blekinge Institute of Technology, Faculty of Engineering, Department of Mechanical Engineering.
2019 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This thesis work is part of the BTH research lab, focusing on developing the early product development, by analyzing how to integrate the manufacturing process with the early design process. A known problem in the manufacturing industry is the knowledge gap between the designers and the manufacturing process. Where in the early stages of the product development a knowledge regarding the manufacture process is needed. This is in many cases ignored by the designers because it is commonly thought that the responsibility of selecting the manufacturing processes for a product falls upon the manufacturers, despite the fact that the manufacturing processes in reality is highly dependent upon the design choses such as materials, size, shape, finishing and tolerances of the product. To mitigate this problem a variations of product ‘team’ approaches have been used where the idea is to involve a multitude of people with the necessary experience to produce a ‘production friendly product’. Those approaches have a few drawbacks mainly the problem of finding people with the relevant experiences or that the expertise only covers the manufacturing processes already used in the organization, losing the opportunity to benefit from any alternative manufacturing process.

This thesis focuses on how the welding manufacturing technic, analysis can be integrated into the design process with the help of a digital model?

To improve the communications between the manufacturers and designers, two excel files were developed. The first excel file aimed at the manufacturers where they can present the specific machines used in the workshop. Focusing on specific machine and workshops instead of on the general welding method will give the designers a better understanding of the feasibility of producing their design in a specific workshop instead of focusing on a specific manufacturing method.

The second excel file is aimed at calculating and comparing the weld methods where the cost and requirements are derived for general welding methods and compared with the machine specifications gathered from the manufacturers using the first excel file. To assess the excel files, a parametrized CAD model of the rear engine turbine structure was developed, and three different cases were used to evaluate the developed excel files.

The values used are presented in Appendix A: Table 11–15, and were gathered from public sources. Values were also approximated using regression analysis.

Abstract [sv]

Avhandlingen är en del av BTH research lab och fokuserar på det tidiga produktutvecklingsstadiet. Närmare kontrolleras hur produkttillverkningsprocessen kan integreras in i det tidiga produktutvecklingsstadiet. Ett känt problem för detta område är skillnaden på kunskapen som designer och tillverkaren besitter under det tidiga produktutvecklingsstadiet, då kunskapen om tillverkningsprocessen inte existerar. Vanligtvis tar inte produktutvecklare hänsyn till detta, eftersom ansvaret för valet av tillverkningsprocessen bedöms falla på tillverkaren. Trots att tillverkningsprocessen beror på många aspekter som bestäms under designprocessen som till exempel materialval, geometrin, efterbehandlingar och toleranser på produkten. För att minimera problemet involverar industrin en stor variation av människor med kompetens och erfarenhet, som sedan kan tillverka en produkt rätt anpassad för tillverkningsprocessen. Dock har denna lösning några nackdelar, då det kan vara svårt att hitta människor med rätt erfarenhet, men då man fokuserar på ett tillverkningssätt så kan företaget gå miste om fördelarna med alternativa tillverkningsprocesser.

Denna avhandling fokuserar på hur analysen av svetstillverkningstekniken kan integreras in i designprocessen med hjälp av en digital modell.

För att förbättra kommunikationen mellan tillverkare och designer har 2 Excel filer utvecklats. Den första Excel filen är riktat mot tillverkarna där dem kan nämna maskinerna som finns tillgängliga i deras verkstad. Den andra Excel filen är till för att kunna göra en kostnadskalkyl och jämföra dem olika tillverkningsmetoderna med hjälp av maskinspecifikationerna som fanns presenterade i den första Excel filen.

För att utvärdera Excel filerna, har en parametrisk CAD modell skapats och 3 fall har använts för att testa de utvecklade CAD modellera. Värdena som använts i detta examensarbete finns i Appendix A: Table 11–15 och är hämtade från allmänt tillgängliga källor. Värden uppskattades också med hjälp av regressionsanalyser.

Place, publisher, year, edition, pages
2019. , p. 88
Keywords [en]
welding, digital models, cost analysis
Keywords [sv]
svetsning, digital modell, kostnadsanalys
National Category
Metallurgy and Metallic Materials Reliability and Maintenance
Identifiers
URN: urn:nbn:se:bth-18317OAI: oai:DiVA.org:bth-18317DiVA, id: diva2:1333559
Subject / course
Degree Project in Master of Science in Engineering 30,0 hp
Educational program
MTACI Master of Science in Mechanical Engineering
Presentation
2019-06-03, 14:00 (Swedish)
Supervisors
Examiners
Available from: 2019-08-19 Created: 2019-07-01 Last updated: 2019-08-19Bibliographically approved

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