1. The punch can enter the die. The shape of the lower right side of the die protrudes outward, protruding point concave die mouth scale, so that the punch can not enter the die, the stretching direction is not stretching, there are changes in the stretching direction, so that the punch can enter the die. Precision stamping parts processing plant
2. Make the punch contact the blank area large. The larger the contact surface, the smaller the Angle between the contact surface and the horizontal surface. The less likely the blank is to have some stress overload and make the parts split. Stretch the function of the die forward, simple to obtain the shape of the punch, is conducive to the advance of the deformation of the stamping parts.
3. Some feed resistance on the pressing surface should be uniform and reliable. Stretch uniform is the pressing surface of the feed resistance uniform and reliable conditions. And the pressing surface of the feed resistance is uniform is not wrinkle, not cracking tensile stamping parts important.
