Method of press working

摘要

Problem to be solved: to provide a press working method capable of forming a perforated portion with higher accuracy with respect to a workpiece to be a ductile material.Solution: the press working method according to the present embodiment applies a pre load in the elastic region of the workpiece (1) by applying a first load to the work material (1) which is a ductile material, and then press (3) to the workpiece (1) to the workpiece (1) By applying a second load that exceeds the first load, the perforated portion (2) is provided to the workpiece (1).Diagram