发明名称 |
Method of making variable thickness tubular member for vehicles |
摘要 |
A method of making a variable thickness tubular member for a vehicle includes the steps of providing a tubular member and positioning a mandrel inside of the tubular member. The method also includes the steps of hydroforming the tubular member into a variable thickness tubular member having a variable wall thickness along its perimeter.
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申请公布号 |
US7370504(B2) |
申请公布日期 |
2008.05.13 |
申请号 |
US20050255733 |
申请日期 |
2005.10.21 |
申请人 |
GM GLOBAL TECHNOLOGY OPERATIONS, INC. |
发明人 |
BRUGGEMANN CHARLES J. |
分类号 |
B21D22/10;B21D26/02 |
主分类号 |
B21D22/10 |
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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