US 12,168,477 B2
Method for manufacturing press-formed product, press forming die, and press-formed product
Takufumi Kobayashi, Hyogo (JP); Yujiro Mitsui, Tokyo (JP); Yu Fukazawa, Tokyo (JP); Shosuke Sakata, Tokyo (JP); Toshiyuki Kumazawa, Tokyo (JP); and Ryusuke Iwata, Tokyo (JP)
Assigned to SUBARU CORPORATION, Tokyo (JP)
Filed by SUBARU CORPORATION, Tokyo (JP)
Filed on Apr. 12, 2022, as Appl. No. 17/718,885.
Claims priority of application No. 2021-068524 (JP), filed on Apr. 14, 2021.
Prior Publication US 2022/0332373 A1, Oct. 20, 2022
Int. Cl. B62D 25/12 (2006.01); B21D 22/06 (2006.01); B21D 37/08 (2006.01); B21D 53/88 (2006.01); B60J 5/04 (2006.01)
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
OG exemplary drawing
 
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.