发明名称 |
WARM PRESS FORMING METHOD AND AUTOMOBILE FRAME COMPONENT |
摘要 |
A method of forming a steel sheet having a tensile strength of 440 MPa or more into a press-formed part including a flange portion and other portions by press forming includes: heating the steel sheet to a temperature of 400° C. to 700° C.; and press-forming the heated steel sheet using draw forming to obtain a press-formed part, with the steel sheet being held at a press bottom dead point in the die for one second to five seconds. Geometric changes such as springback that occur in a panel can thus be suppressed, the dimensional accuracy of the panel can be enhanced, and the desired mechanical properties can easily be obtained in the press-formed part. |
申请公布号 |
US2015064052(A1) |
申请公布日期 |
2015.03.05 |
申请号 |
US201314382995 |
申请日期 |
2013.03.04 |
申请人 |
JFE Steel Corporation |
发明人 |
Tokita Yuichi;Tamai Yoshikiyo;Minote Toru;Fujita Takeshi |
分类号 |
B21K7/12;C22C38/50;C22C38/44;C22C38/28;C22C38/24;C22C38/20;C22C38/14;C22C38/12;C22C38/10;C22C38/08;C22C38/06;C22C38/04;C22C38/02;C22C38/00;B21J1/06;C22C38/60 |
主分类号 |
B21K7/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
Tokyo JP |