文献翻译—薄板冲压件焊装夹具设计方法.doc

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附录A 英文文献
On Welding-Installation Fixtures Design of Sheet Stamping
Abstract: Due to forming error pliance of stamp-ing, the fixture design of sheet stamping assembly is different from the fixture design mon ponent. In recent years, the new principles and algorithms of fixture design of sheet stamping have been developed. In the paper, the concept of shape closure and force closure, screw theory were firstly introduced. Secondly, the deterministic locating and total fixturing conditions were derived. Thirdly, an “N-2-1”locating principle and optimal design method for sheet stamping were described. Finally, the varia-tional method of robust fixture configuration design for 3-D workpieces was discussed. It can be predicated that the locating error can be reduced by this method.
Key Words: Fixture; Sheet Stamping; Optimal Design; Ro-Bust Design
Due to its high productivity and material utilization, stamping is widely used in automobiles, aircraft, and various household appliances manufacturing industry. The welding assembly of stamping es the key process of those products manufacturing, because welding fixture not only affects the performance of productivity, but also is directly related to the quality of the product. Statistics from the . auto industry show that 72% of the body manufacturing errors are from the position error of welding fixture, so how to effectively re