CUTTING METHOD USING FORGING PRESS Russian patent published in 2019 - IPC B21D28/34 B23K31/00 

FIELD: cutting.

SUBSTANCE: invention relates to a cutting method in which a stamping press is used to clip and cut a workpiece. Proposed method consists in cutting of processed billet consisting of first metal sheet and second metal sheet welded together and having zone of thermal influence around welded seam wherein cut billet is cut using male die. Male die includes flat part and projecting part extending in direction of processed workpiece further than flat part. Processed workpiece is positioned relative to the male die so that the protruding part begins cutting in the zone of thermal influence and / or welded seam before the flat part will cut the workpiece. Then, workpiece is cut to move punch and matrix relative to each other in this positioning position to perform cutting through weld seam in this workpiece.

EFFECT: result is reduction of residual mechanical stresses on cutting surface.

8 cl, 1 tbl, 20 dwg