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

Claim 14:
15. A method for manufacturing a blank material to be formed into 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 a flange corresponding portion to the flange portion where there is concern about risk of occurrence of an edge crack due to stretch flange deformation on an edge of a material to be pressed in the at least one press forming step; and
performing a first cutting to form a cantilever beam portion at a position including the crack risk portion and performing a second cutting to cut off the cantilever beam portion before the at least one press forming step.