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Unformatted text preview: ocess variation will influence the final geometry and variation of the assembly. The fulfillment of dimensional specifications is fundamental to assure that the final product will comply with functional, aesthetical and assembly requirements, which are important for the overall quality of the product. To manage this, geometry related production problems must be avoided during early design stages. This is done by analyzing the assembly variation by using different variation simulation techniques. 1.1. Sheet metal assembly process The sheet metal assembly process is often modeled as four sequential steps: 1. Parts are placed in a fixture. 2. Parts are clamped. 3. Parts are joined together. 311
J.K. Davidson (ed.), Models for Computer Aided Tolerancing in Design and Manufacturing, 311 – 320. © 2007 Springer. 312 S. Dahlström, L. Lindkvist and R. Söderberg 4. The assembly is released from the fixture. The most common welding method for joining sheet metal parts is resistance spot welding. There...
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- Spring '10
- The Land