Local trimming process of punching mold and punching mold

The invention provides a local trimming process of a punching mold and the punching mold. The process comprises a press forming process, supply of forming force to a hydraulic buffer cylinder at the bottom of the mold, and a trimming process; the supply of the forming force to the hydraulic buffer cylinder at the bottom of the mold is controlled by a computer; and the forming force is effectivelysupplied to realize synchronous implementation of punching and trimming so as to prevent the damage of the mold and to reduce the burden of a press. 本发明提供一种冲压型模具的局部修边工艺及其冲压成型模具，所述工艺包括压机成型过程、模具底部液压缓冲缸供成型力和修边过程，模具底部液压缓冲缸供成型力由电脑控制，有效供给成型力，实现冲压和修边的同时进行，防止模具的损坏和降低压机的负担。