A punch, apparatus and method for forming opposing holes in a hollow part, and a part formed therefrom.
一种冲头、用于在中空零件中形成相对的孔的设备和方法以及由此形成的零件。
The apertures in which the cutting edges are formed has at least one straight edge (80) by which a punch, used in the process of forming the edge may be oriented.
其中形成切割边缘的孔有至少一个直边缘（80），在形成边缘的处理中 使用的冲头可以通过该直边缘来定向。
According to the forming classification of punch-formed car components, the new method for evaluating stamping grade was put forward.
在轿车冲压件成形分类的基础上，提出了新的冲压级别评定方法。
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