发明名称 |
Tubular local expansion apparatus and method of locally expanding tubular member for vehicles |
摘要 |
An apparatus and method for locally expanding tubular member includes a pre-form die having a cavity with an expansion chamber therein to receive a portion of a tubular blank between ends thereof. The apparatus also includes a bladder apparatus for insertion in the tubular blank and cooperating with the pre-form die to locally expand the portion of the tubular blank in the expansion chamber to form a locally expanded tubular member.
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申请公布号 |
US7380429(B1) |
申请公布日期 |
2008.06.03 |
申请号 |
US20070680139 |
申请日期 |
2007.02.28 |
申请人 |
GM GLOBAL TECHNOLOGY OPERATIONS, INC. |
发明人 |
GHIRAN MIKE M.;SHAH SANJAY M. |
分类号 |
B21D22/12;B21D51/00 |
主分类号 |
B21D22/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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