目前,在普通压力机上进行精密冲载,其模具结构形式有各种各样。按其压边力的来源,可大致分为液压式、机械式和弹性元件式三类。这些模具在生产实践中都发挥了一定的作用,可是由于各自的性能各有所长,其使用范围也不一样。如液压式压边精冲模的优点是:齿圈压力大、且为恒定值,可以加工强度较高的材料,得到高质量的冲裁零件, At present, the ordinary press on the precision load, the mold structure in various forms. According to the source of the blank holder force, can be roughly divided into hydraulic, mechanical and elastic components of the three categories. These molds have played a certain role in the production practice, but because of their respective strengths, their use is not the same. Such as hydraulic edge compression die edge has the advantage of: ring gear pressure, and for a constant value, high strength materials can be processed to obtain high-quality blanking parts,