落料模在正常的间隙冲裁下,往往发现冲下的零件,要比凹模大一些。为什么?对于这个问题,想谈谈自己工作上的一点实际体会,便于大家共同探讨。 我们知道:金属的冲裁过程是由弹性变形阶段—塑性变形阶段—剪裂变形阶段所组成的。冲裁时,凸模与板料开始接触,这时 Blanking blanking in the normal gap blanking, often found the red part, larger than the die. Why? For this question, I’d like to talk about the actual experience of my work so as to facilitate discussion by all of you. We know: metal blanking process from the elastic deformation stage - the stage of plastic deformation - shear deformation stage of the composition. Blanking, the punch and the sheet began to contact, then