METHOD FOR BENDING SHEET METAL AND PRODUCT OF SHEET METAL

摘要

A method for bending a sheet metal, which comprises: a hardness adjustment step wherein a blank (10) that has a high hardness region (11) and a low hardness region (12) having a lower hardness than the high hardness region (11) is formed by changing the hardness of at least a part of a sheet metal; and a bending step wherein a product (20) is formed by bending the low hardness region (12) of the blank (10).