Patent ID: 11931788
Assignee: JFE STEEL CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A method for manufacturing a pressed component comprising a flange portion through one or two or more press forming steps, where stretch flange deformation occurs in at least one press forming step of the one or two or more press forming steps, the method comprising:
specifying a position of a crack risk portion that is a portion of the flange portion where there is concern about risk of occurrence of an edge crack due to the stretch flange deformation on an edge of a material to be pressed in the at least one press forming step, and
performing a two-stage cutting processing on the edge including the crack risk portion before the at least one press forming step, as a pre-processing for press forming where there is the concern about the risk of the occurrence of the edge crack, wherein
the two-stage cutting processing includes
performing first-cutting to form a cantilever beam portion at a position including the crack risk portion, and
performing second-cutting to cut off the cantilever beam portion before the at least one press forming step.