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介绍了一种在滑移线场图解分析基础上建立的正挤凹模理想轮廓的设计方法，对这种理想凹模的单位挤压力和变形功进行了计算；并将此凹模的单位挤压力与光滑楔形模的单位挤压力进行了比较。
A design method of ideal profile of forward die is established based on the graphic analysis of slip line field. The unit squeezing force and work of this perfect die are calculated. The unit of this die The squeeze pressure is compared with the unit squeeze force of a smooth wedge die.