冲裁间隙的大小,直接影响到冲件的精度,表面质量,冲裁力的大小以及模具的耐用度。 早在1964年以前,我们一直是参照苏联的资料,不问金属的类别,仅就其厚度的大小选定如下的间隙数值(表1),实践证明,当这些数值用于有色金属时,基本上能够取得满意的结果。 当冲裁黑色金属采用表1数值,则由于间隙过小,从凸凹模刃口出发的剪裂纹产生 Blanking gap size, a direct impact on the accuracy of the punch, the surface quality, the size of the punching force and the durability of the mold. As early as 1964, we had always referred to the information of the Soviet Union. Regardless of the type of metal, only the following gap values ​​(Table 1) were selected for the thickness of the steel. Practice has proved that when these values ​​are used for non-ferrous metals, the basic Satisfactory results can be achieved. When punching black metal using the value of Table 1, then the gap is too small, starting from the punch and die edge crack initiation