Invention Grant
- Patent Title: Method of hot-press forming enabling hardness control
- Patent Title (中): 热压成型方法可实现硬度控制
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Application No.: US13638952Application Date: 2011-03-28
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Publication No.: US09409221B2Publication Date: 2016-08-09
- Inventor: Masanori Kobayashi
- Applicant: Masanori Kobayashi
- Applicant Address: JP Tokyo
- Assignee: TOPRE CORPORATION
- Current Assignee: TOPRE CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JP2010-099346 20100423
- International Application: PCT/JP2011/057591 WO 20110328
- International Announcement: WO2011/132501 WO 20111027
- Main IPC: B21D22/02
- IPC: B21D22/02 ; B21D22/20 ; B21D37/16 ; C21D1/18 ; C21D1/673 ; C21D7/13 ; C21D8/04 ; C21D9/46 ; C22C38/02 ; C22C38/04 ; C22C38/18
Abstract:
A hardenable steel sheet is treated with press-forming by means of a die. The method is comprised of: heating the steel sheet to a temperature of an Ac3 point or higher; carrying out a primary press on the heated steel sheet so as to give a local strain to a limited part of the steel sheet; keeping the steel sheet in a state apart from the die shortly after the primary press; and carrying out a press on the steel sheet kept in the state and retain the steel sheet in close contact with the die.
Public/Granted literature
- US20130025340A1 METHOD OF HOT-PRESS FORMING ENABLING HARDNESS CONTROL Public/Granted day:2013-01-31
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