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一、概述图1为一汽车零件(止动螺钉)。其结构特点为:有一个对边距为8mm 的六方孔。过去在加工此零件六方孔时,是采用一台压床和一套冲模将零
First, an overview Figure 1 for a car parts (set screws). Its structural features are: There is a hexagonal hole on the edge of 8mm. In the past in the processing of hexagonal parts of this part, is the use of a press and a set of die will be zero