第一章冲裁、剪切(续) §1.9 稳定获得冲裁件尺寸精度的方法用冲压模进行冲压加工最令人烦恼的是不能保持被冲件的尺寸。这不外是“模具不能总保持初期的精度的缘故”。其最大的原因如下: 1)外因引起的破损(送进、插入不良等); 2)内因引起的破损、磨损(模具零件强度,表面加工不良等); 3)纯粹磨损。 Chapter 1 Punching and Shearing (Continued) §1.9 Stable Method for Obtaining the Dimensional Accuracy of Blanking Parts The most troublesome part of stamping with stamping dies is the inability to maintain the dimensions of the blanked part. This is nothing more than “the mold can not always maintain the accuracy of the initial reason.” The biggest reasons are as follows: 1) Damage caused by external factors (feeding, insertion, etc.); 2) Damage caused by internal causes, wear and tear (mold part strength, surface finishing defects, etc.); 3) Pure wear and tear.