发明名称 |
Apparatus for hole punching |
摘要 |
Apparatus is provided for punching holes through the opposed first and second tube walls of a hydroformed tube while the tube is within the die cavity formed by a pair of hydroforming dies. A punch is mounted within a punch bore that intersects with the die cavity. A punch advances the punch to punch a first hole in the first tube wall and then travel across the die cavity and make a second hole in the second tube wall. A support mechanism for supporting the second wall of the tube against rupture by the hydroforming pressure includes spring biasing a support face of a support rod into engagement with the second wall and yielding during the punching of the second hole. A support rod actuator withdraws the support rod to carry the support face away from the second wall after the second hole is punched.
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申请公布号 |
US7503197(B2) |
申请公布日期 |
2009.03.17 |
申请号 |
US20070674737 |
申请日期 |
2007.02.14 |
申请人 |
GM GLOBAL TECHNOLOGY OPERATIONS, INC. |
发明人 |
GHIRAN MIKE M.;MARKS KEVIN R. |
分类号 |
B21D28/28;B21D26/02 |
主分类号 |
B21D28/28 |
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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