Patent ID: 11752537

Abstract:
The present disclosure concerns a process for the blanking of metal parts (1) from a—layered basic material (51) composed of a number of mutually stacked individual layers (50) placed and clamped between a blanking die (80) and a blank holder (70) of a blanking device (100), wherein a blanking punch (31; 32) of the blanking device (100) is moved relative to the blanking die (80) to cut and separate the metal parts (1) from the basic material (51). According to the present disclosure, such multi-layer blanking process is carried out in two successive stages (I, II), whereof a first stage (I) entails the punching of holes (3) by a first blanking punch (31) without applying a counter punch and whereof a second stage (II) entails the blanking of the metal parts (1) by a second blanking punch (32) while being supported by a counter punch (40).