在普通冲床上拉伸曲线形零件是有一定困难的,如果用拉伸筒形件的模具结构,在大圆角处往往形成皱纹,这主要是由于大部分的毛料没有被压边圈压住,压边力又小而形成的。后来我们将凹模和压边圈的两压边面上加工成波浪形,其它部分完全和筒形拉伸模相同,这样拉伸出的零件就完全达到了图纸要求。 It is somewhat difficult to stretch curvilinear parts on a common punch. If the mold structure of a drawing cylinder is used, wrinkles often form on the large fillet, which is mainly due to the fact that most of the wool is not pressed by the blank holder, Binding force is small and formed. Later, we will be concave die and blank holder on both sides of the pressure into a wave-shaped edge, the other part of the same completely and cylindrical tensile modulus, so that the parts stretched out to fully meet the requirements of the drawings.