发明名称 |
Quick plastic forming of aluminum alloy sheet metal |
摘要 |
A method is disclosed for stretching magnesium-containing aluminum alloy sheet stock into intricate shapes such as are required in automotive body panels. The sheet stock, at a temperature in the range of about 400° C. to about 510° C., is stretched under the pressure of a working gas into conformance with the surface of a forming tool. The sheet forming pressure is increased continually in a controlled manner from ambient pressure to a final forming level in the range of about 250 psi to about 500 psi or higher. A portion of the sheet can experience strain rates substantially higher than 10-3 sec-1 and the forming of the sheet can be completed within 12 minutes.
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申请公布号 |
US6253588(B1) |
申请公布日期 |
2001.07.03 |
申请号 |
US20000545500 |
申请日期 |
2000.04.07 |
申请人 |
GENERAL MOTORS CORPORATION |
发明人 |
RASHID MOINUDDIN SIRDAR;KIM CHONGMIN;RYNTZ EDWARD FRANK;SAUNDERS FREDERICK IRVIN;VERMA RAVI;KIM SOOHO |
分类号 |
B21D26/02;B21D53/88;C22C21/00;C22F1/00;C22F1/04;C22F1/047;(IPC1-7):B21D26/02 |
主分类号 |
B21D26/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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