发明名称 |
Self-tapping headless lobular insert forming method - forms longitudinally spaced chamfers or bevels on rod by orbital or helicoid movement of latter, using rod side surfaces as guide |
摘要 |
<p>The method involves first forming an elongated rod or bar into a specific desired lobular cross-sectional configuration. A number of longitudinally spaced-apart chamfer or bevel portions are then formed by an orbital or helicoid movement of the rod. This movement employs the side surfaces of the rod as a guide, to provide lobular chamfers which comprise smooth continuations of the external lobular configuration. The bevelled rod is then passed through a two die rolling machine in such a manner that the rod describes a helicoid path as it advances, thus forming a thread on its peripheral portions and on adjacent portions of the bevels.</p> |
申请公布号 |
DE2929008(A1) |
申请公布日期 |
1981.02.05 |
申请号 |
DE19792929008 |
申请日期 |
1979.07.18 |
申请人 |
GROOV-PIN CORP. |
发明人 |
W. BOSSE,ROBERT |
分类号 |
B21H3/04;B23P13/02;(IPC1-7):21H3/00 |
主分类号 |
B21H3/04 |
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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