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Minimizing Dimensional Variation and Robot Traveling Time in Welding Stations

Johan S Carlson (Institutionen för produkt- och produktionsutveckling, Produktutveckling) ; Domenico Spensieri (Institutionen för produkt- och produktionsutveckling, Produktutveckling) ; Kristina Wärmefjord (Institutionen för produkt- och produktionsutveckling, Produktutveckling) ; Johan Segeborn ; Rikard Söderberg (Institutionen för produkt- och produktionsutveckling, Produktutveckling)
5th CIRP Conference on Assembly Technologies and Systems, November 13-14, 2014, Dresden, Germany (2212-8271). Vol. 23 (2014), C, p. 77-82.
[Konferensbidrag, refereegranskat]

Complex assembled products as an automotive car body consist of about 300 sheet metal parts joined by up to 4000 spot welds. In the body factory, there are several hundred robots organized into lines of welding stations. The distribution of welds between robots and the welding sequences have a significant influence on both dimensional quality and throughput. Therefore, this paper proposes a novel method for quality and throughput optimization based on a systematic search algorithm which exploits properties of the welding process. It uses approximated lower bounds to speed up the search and to estimate the quality of the solution. The method is successfully tested on reference assemblies, including detailed fixtures, welding robots and guns.

Nyckelord: Assembly, joning, spot welding, robots, dimensional quality, cycle time, optimization, branch and bound



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Denna post skapades 2014-11-24. Senast ändrad 2016-03-10.
CPL Pubid: 206491

 

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