在冲压生产中，经常遇到无凸缘薄壁件的拉深加工。如果薄壁件形状较为复杂，在冲模设计中就要解决两个主要问题：（１）因出料要求凹模不能采用整体形状；但由于工件形状复杂，凹模需整体加工，这个矛盾在设计中应予考虑。（２）由于拉深件下料时要留出修边量，故在拉深后应有 In stamping production, often without flange thin-walled parts of the deep drawing. If the shape of the thin-walled parts is more complicated, two main problems must be solved in the die design: (1) The die can not adopt the whole shape because of the material requirement; however, due to the complicated shape of the workpieces, the die must be processed integrally. Should be considered. (2) As the drawing parts to leave the trimming amount, it should be after drawing