CPC B62D 25/12 (2013.01) [B21D 22/06 (2013.01); B21D 37/08 (2013.01); B21D 53/88 (2013.01); B60J 5/0415 (2013.01)] | 7 Claims |
1. A method for manufacturing a press-formed product for press-forming a blank material into a target shape, the blank material including: a product portion constituting a design surface of a product, a peripheral portion pressed by a blank holder, and an excess thickness portion connecting the product portion and the peripheral portion, the method comprising:
press-forming the blank material into an intermediate shape; and
further press-forming the blank material from the intermediate shape into the press-formed product having the target shape,
wherein the product portion of the target shape comprises a first ridge line portion and a second ridge line portion on the design surface, the first ridge line portion and the second ridge line portion each having a radius of curvature of 20 mm or smaller and a bending angle of 130 degrees or larger,
wherein the product portion of the target shape comprises a first region from one end of the product portion to the first ridge line portion, a second region from the first ridge line portion to the second ridge line portion, and a third region from the second ridge line portion to the other end of the product portion in a specific cross section perpendicular to a direction in which the first ridge line portion or the second ridge line portion extends,
wherein the product portion of the intermediate shape has a shape the same as the target shape in a central region corresponding to the second region of the target shape,
wherein the product portion of the intermediate shape has a curved shape having a radius of curvature of 100 mm or larger or a linear shape from the central region toward the excess thickness portions on both sides in the specific cross section, and
wherein a height of the excess thickness portion of the intermediate shape is higher than 10 mm with respect to the peripheral portion and lower than a height of the excess thickness portion of the target shape.
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