发明名称 |
Method of forming a cold-headed standoff |
摘要 |
A method of head trimming a fastener blank in a cold-forging process comprises placing a fastener blank into a bore of a punch having an end face; supporting an underside of a head portion of the fastener blank with the punch end face; moving a die having an internal passage and a trim plate with a cutting edge toward the fastener blank; shearing the head of the fastener blank with the cutting edge of the trim plate; stopping movement of the die at an extended trim position where the cutting edge lies beyond an underside of the head portion of the fastener blank; ejecting the fastener blank from the punch bore and through the die passage to an opposite side of the die; retracting the die; and removing a scrap ring from around the punch by a stripper sleeve.
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申请公布号 |
US7175533(B2) |
申请公布日期 |
2007.02.13 |
申请号 |
US20050306008 |
申请日期 |
2005.12.14 |
申请人 |
PEM MANAGEMENT, INC. |
发明人 |
FRANCO JAMES S;LITZENBERGER THOMAS K |
分类号 |
B21K1/44;B21J9/02;B21J13/14;B21K1/50;B21K1/56 |
主分类号 |
B21K1/44 |
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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