Method for bending sheet metal and product of sheet metal
AssigneeNippon Steel & Sumitomo Metal Corporation
InventorsMasaaki Mizumura, Koichi Sato, Satoshi Shirakami
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Abstract
A method for bending a sheet metal comprises: a hardness adjustment process wherein a blank (10), including 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 process wherein a product (20) is formed by bending low-hardness region (12) of blank (10).
Claims27
A method for bending a sheet metal, the method comprising:
- a hardness adjusting process for changing hardness of at least a part of the sheet metal so as to form a blank including a high-hardness region and a low-hardness region having a hardness lower than a hardness of the high-hardness region;
- and
- a bending process for bending an objective region to be processed, which includes the low-hardness region and the high-hardness region of the blank, so as to form a product,
- wherein the hardness adjusting process comprises forming the objective region to be processed in at least a part of the sheet metal, wherein one side of the sheet metal is formed as the low-hardness region and the other side of the sheet metal is formed as the high-hardness region.
A method for manufacturing a blank as a product by carrying out a bending process, the method comprising:
- a process for changing hardness of at least a part of a sheet metal so as to form a blank having an objective region to be processed, which includes a high-hardness region and a low-hardness region having a hardness lower than a hardness of the high-hardness region,
- wherein the objective region to be processed is formed in a region of the blank including a region which is deformed by the bending process, and
- wherein one side of the sheet metal is formed as the low-hardness region, and the other side of the sheet metal is formed as the high-hardness region.
A method for manufacturing a blank by carrying out bending process, the method comprising:
- a process for changing hardness of a sheet metal in a thickness direction thereof so as to form a blank having an objective region to be processed, the objective region being formed in at least a part of the sheet metal so that the objective region includes front and back sides having different hardness,
- wherein the side of the objective region having lower hardness is formed in an inside region of a deformed portion which is deformed by the bending process.
Dependencies are inferred from the claim text.