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一引言自从1857年Alexander Parks申请拉深工艺的专利到本世纪八十年代,确定毛坯形状尺寸方法随越来越多的要求,诸如节约原材料,减小压力机功率,提高成形极限,保证拉深件口部平整及厚度变化均匀等而不断发展。本世纪八十年代后,对确定毛坯外形方法提出了优化拉深工艺的问题,从而为模具的CAD/CAM打下了基础。人们控制拉深过程的两个重要方面是毛坯外形和施加于毛坯上的载荷。确定合理的毛坯
I. INTRODUCTION Since Alexander Parks applied for the patented process of deep drawing in 1857 to the 1980s, more and more requirements have been set for the blank shape and size method, such as saving raw materials, reducing the press power, increasing the forming limit and ensuring drawing Parts of the mouth smooth and uniform thickness changes and continuous development. After the eighties of this century, the method of determining the outline of the blank was put forward to optimize the drawing process, which laid the foundation for CAD / CAM of the mold. Two important aspects of people’s control of the drawing process are the shape of the blank and the load applied to the blank. Determine a reasonable blank