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A tramming concept for a mechanical rock excavation machine
KTH, School of Industrial Engineering and Management (ITM), Machine Design (Dept.).
2015 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesisAlternative title
Ett trammningskoncept för en mekanisk bergavverkningsmaskin (Swedish)
Abstract [en]

This report is the result of a thesis project at KTH in cooperation with Svea Teknik AB and Atlas Copco Mining and Rock Excavation. Atlas Copco is currently developing a family of machines for mechanical rock excavation. All machines in the family have two propulsion methods. The goal of this project has been to reduce the number of propulsion methods down to one, in one of these machines, the Mobile miner. The project has been divided into three main phases; background studies, concept development and documentation. The concept development phase has in turn been divided into four parts: generation, evaluation, development and validation. During the project no physical prototypes, drawings, component selections, software programming, calculations of friction losses or detailed FEM analysis were made. Nine concepts were developed. These were assessed with respect to a product specification using a weighted PUGH-matrix. The concept that received the highest ranking in the PUGH-matrix was six arms that are used to pull the machine forward. The concept was developed with respect to applicability, durability and fatigue. This resulted in a concept with four arms similar to scissor lift tables placed horizontally. The function has been verified using CAD-models, calculation of safety factors against fatigue and FEM-models. The only specification that was not achieved was the speed.

Abstract [sv]

Denna rapport är resultatet av ett examensarbete på KTH i samarbete med Svea Teknik AB och Atlas Copco Mining and Rock Excavation. Atlas Copco utvecklar för närvarande en familj av maskiner för mekanisk bergsbrytning. Samtliga maskiner i familjen har två framdrivningsmetoder. Målet med detta projekt har varit att reducera antalet framdrivningsmetoder till en i en av dessa maskiner, Mobile minern. Projektet har varit uppdelat i tre huvudfaser: bakgrundsstudier, konceptutveckling och dokumentation. Konceptutvecklingen har i sin tur varit uppdelad i fyra delar: generering, bedömning, utveckling och validering. I projektet har inga fysiska prototyper, ritningar, komponentval, mjukvaruprogrammering, beräkningar av friktionsförluster eller detaljerade FEM-analyser gjorts. Nio koncept togs fram. Dessa bedömdes med avseende på en produktspecifikation med hjälp aven viktad PUGH-matris. Det koncept som fick högst rankning i PUGH-matrisen var sex armar som används för att dra maskinen framåt. Konceptet utvecklades med avseende på applicerbarhet, hållbarhet och utmattning och slutade som ett koncept med fyra armar liknande saxlyftbord som lagts horisontellt. Funktionen har verifierats genom CAD-modeller, beräkning av säkerhetsfaktorer mot utmattning och FEM-modeller. Den enda produktspecifikationen som inte uppnåddes var farten.

Place, publisher, year, edition, pages
2015. , 52 p.
, MMK 2015:52 MKN 139
Keyword [en]
Tramming, Propelling, Mechanical rock excavation
Keyword [sv]
Tramming, Propellering, Mekanisk bergavverkning
National Category
Mechanical Engineering
URN: urn:nbn:se:kth:diva-183528OAI: diva2:912282
Available from: 2016-03-16 Created: 2016-03-16 Last updated: 2016-03-16Bibliographically approved

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