发明名称 |
SPIRAL DRIVE FASTENER WITH STICK FIT SURFACE AND METHOD OF MANUFACTURE |
摘要 |
Interference surfaces are constructed on inner transition surfaces between wings of a fastener having a spiral recess. A portion of the transition surface is tapered to provide the interference. A standard driver for a spiral recess will engage the interference surface to create a "stick fit" engagement. The punch is formed using a wire EDM operation to construct tapered surfaces within the die cavity of a hob. The hob is machined down to obtain the desired depth, which is measured up from a gage spot indicative of the sticking point.
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申请公布号 |
US2007269289(A1) |
申请公布日期 |
2007.11.22 |
申请号 |
US20070832812 |
申请日期 |
2007.08.02 |
申请人 |
PHILLIPS SCREW COMPANY, INC. |
发明人 |
DILLING GARY |
分类号 |
F16B35/06;B21K5/20;B23P15/00;F16B23/00 |
主分类号 |
F16B35/06 |
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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