Invention Grant
- Patent Title: Press forming method
-
Application No.: US17602093Application Date: 2019-12-27
-
Publication No.: US12109600B2Publication Date: 2024-10-08
- Inventor: Satoshi Sumikawa
- Applicant: JFE STEEL CORPORATION
- Applicant Address: JP Tokyo
- Assignee: JFE STEEL CORPORATION
- Current Assignee: JFE STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Oliff PLC
- Priority: JP 19080657 2019.04.22
- International Application: PCT/JP2019/051362 2019.12.27
- International Announcement: WO2020/217593A 2020.10.29
- Date entered country: 2021-10-07
- Main IPC: B21D22/26
- IPC: B21D22/26 ; B21D53/88 ; B29C43/02

Abstract:
A press forming method forms a press-formed product having a hat-shaped cross section and includes: a first forming process of press-forming a preformed part in which a portion corresponding to web corresponding to a web portion, and a portion corresponding to side wall corresponding to a side wall portion and including a twisted side wall portion of a twisted shape along the longitudinal direction, are formed, the preformed part including a portion corresponding to convex curve corresponding to a convex curved portion; and a second forming process of press-forming the preformed part into the press-formed product. The twisted side wall portion at the first forming process is twisted such that an angle between the twisted side wall portion and the portion corresponding to web is larger on an end portion side than at a center of the portion corresponding to convex curve in the longitudinal direction.
Public/Granted literature
- US20220143672A1 PRESS FORMING METHOD Public/Granted day:2022-05-12
Information query