US 12,115,571 B2
Press-forming method, blank member for sheet-shaped material, intermediate formed product, method for manufacturing press-formed product, and press-formed product
Yuta Kariyazaki, Tokyo (JP); Toyohisa Shinmiya, Tokyo (JP); and Yuji Yamasaki, Tokyo (JP)
Assigned to JFE Steel Corporation, Tokyo (JP)
Appl. No. 17/417,217
Filed by JFE Steel Corporation, Tokyo (JP)
PCT Filed Dec. 9, 2019, PCT No. PCT/JP2019/048026
§ 371(c)(1), (2) Date Jun. 22, 2021,
PCT Pub. No. WO2020/144995, PCT Pub. Date Jul. 16, 2020.
Claims priority of application No. 2019-003793 (JP), filed on Jan. 11, 2019; application No. 2019-003819 (JP), filed on Jan. 11, 2019; and application No. 2019-160018 (JP), filed on Sep. 3, 2019.
Prior Publication US 2022/0048088 A1, Feb. 17, 2022
Int. Cl. B21D 19/12 (2006.01); B21D 22/26 (2006.01); B21D 53/88 (2006.01)
CPC B21D 19/12 (2013.01) [B21D 22/26 (2013.01); B21D 53/88 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A press-forming method, characterized in that
the press-forming method comprises
a first pressing step of folding an excess material portion provided in a sheet-shaped material to form straight sides into an intermediate formed product with a bent flange portion, and
a second pressing step of performing press forming including bulging to provide a bulging portion on the intermediate formed product.