Dipe cutting by Double Punching is an ideal and efficient method.On the basis of Scrap Out Going,the theoretical curve of the punch is deduced.

• 从理论上对双冲切管方法进行论证，以切刀剪切过程中废屑外翻为条件，保证切断质量，从而确定切刀刀刃的理论曲线形状。