发明名称 |
Foret de perçage à tête hémisphérique à coupe évolutive. |
摘要 |
The cutting end (7) or tip of a twist drill bit (1) has a hemispherical overall shape and has four cutting lips, two (8, 9) of which are arranged flight to flight at the top S of the drill bit. The cutting angle of the cutting edge of the said lips alters and varies from zero degrees at the top S up to a value determined experimentally as a function of the material to be machined at the point P, at the end of the diameter d of the drill bit. <IMAGE> |
申请公布号 |
FR2713527(B1) |
申请公布日期 |
1996.01.12 |
申请号 |
FR19930014697 |
申请日期 |
1993.12.08 |
申请人 |
SNECMA;ROY BERNARD |
发明人 |
CABARET MAURICE, JEAN;DAUDE CHRISTIAN, THIERRY;LAVOCAT DANIEL, MARCEL, EUGENE;LEBOULANGER JEAN, PIERRE;LEBRUN MICHEL;MASSON FRANCOIS;ROUGE GILLES;ROY BERNARD, GILBERT |
分类号 |
B23B51/00;B23B31/00;B23C5/10;(IPC1-7):B23B51/02 |
主分类号 |
B23B51/00 |
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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