发明名称 |
FLOW DRILL FOR THE PROVISION OF HOLES IN SHEET MATERIAL |
摘要 |
A flow drill (1) having a cross-sectional contour satisfying a complex harmonic curve according to the formula as given in the claim. Said contour ensures a uniform load distribution on the hole wall and little or no material growth on the drill. The contour is symmetrical in the rotation direction whereby reverse of drill rotation is permitted. |
申请公布号 |
DE3260137(D1) |
申请公布日期 |
1984.06.14 |
申请号 |
DE19823260137 |
申请日期 |
1982.01.19 |
申请人 |
FLOWDRILL B.V. |
发明人 |
HOOGENBOOM, ALOYSIUS JOSEPH |
分类号 |
B21C37/29;B21D31/02;(IPC1-7):B21D31/02 |
主分类号 |
B21C37/29 |
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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