US 12,083,572 B2
Press molding method
Hirokatsu Akiba, Tochigi-ken (JP); Takeshi Sano, Tochigi-ken (JP); Kenji Matsutani, Tochigi-ken (JP); and Takayuki Kano, Tochigi-ken (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Appl. No. 17/439,422
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
PCT Filed Mar. 3, 2020, PCT No. PCT/JP2020/008793
§ 371(c)(1), (2) Date Sep. 15, 2021,
PCT Pub. No. WO2020/195591, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 2019-063176 (JP), filed on Mar. 28, 2019.
Prior Publication US 2022/0152682 A1, May 19, 2022
Int. Cl. B21D 22/26 (2006.01)
CPC B21D 22/26 (2013.01) 10 Claims
OG exemplary drawing
 
1. A press forming method for forming a plate member into a target formed body in which a ridgeline section is included, the press forming method comprising:
a first step of forming an intermediate formed body including an intermediate ridgeline section with a radius greater than an edge radius of the ridgeline section; and
a second step of forming the target formed body from the intermediate formed body,
wherein the target formed body and the intermediate formed body each include an intermediate region and coincident regions on both sides of the intermediate region, cross-sectional shapes of the target formed body and the intermediate formed body coincide in the coincident regions and do not coincide in the intermediate region,
in the intermediate region, an outside region of the intermediate formed body projects more outwardly of the edge radius than the target formed body, and an inside region of the intermediate formed body is curved more inwardly of the edge radius than the target formed body, and
a length, in a cross-sectional direction, of the intermediate formed body in the outside region is longer than a length, in the cross-sectional direction, of the intermediate formed body in the inside region.