发明名称 |
Spring-loaded part extractors for heated forming tools |
摘要 |
A hot blow-forming apparatus includes opposed and complementary forming tools adapted for hot blow forming a surface of a heated sheet-metal workpiece against a forming surface of one of the tools. The tools are also adapted to close upon and grip a peripheral edge of the workpiece and perform work on a central portion of the workpiece to produce a formed panel. The tools incorporate an improved extraction apparatus, which includes a plurality of opposed and complementary spring-loaded extractor pads. Opposed extractor pads are spring-loaded to different levels so as to apply spring-load differentials therebetween and thereby apply different extraction forces in different locations of the resultant formed panel for distortion-free removal of the formed panel from the working surfaces of the tooling.
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申请公布号 |
US7080535(B2) |
申请公布日期 |
2006.07.25 |
申请号 |
US20040827721 |
申请日期 |
2004.04.20 |
申请人 |
GENERAL MOTORS CORPORATION |
发明人 |
KRUGER GARY A.;SCHROTH JAMES G.;HAMMAR RICHARD HARRY |
分类号 |
B21D26/02;B21D28/18 |
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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