发明名称 |
TWIST DRILL |
摘要 |
PROBLEM TO BE SOLVED: To provide a twist drill that shows stable performance by virtue of an improved chip evacuating flute leading to prevention of cutting edge chipping by chip jamming while chips are evacuated and to promotion of coolant penetration into the chip evacuating flute. SOLUTION: The twist drill made of cemented carbide or of TiCN system cermet has in a sectional view taken perpendicularly to the axis thereof an S shape spreading from that portion of a chip evacuating flute which is just off the web thickness to a land side. This S shape has a point of inflection situated away from the drill axis by a distance 0.40 to 0.80 times as long as the drill diameter.
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申请公布号 |
JP2001096415(A) |
申请公布日期 |
2001.04.10 |
申请号 |
JP19990273927 |
申请日期 |
1999.09.28 |
申请人 |
HITACHI TOOL ENGINEERING LTD |
发明人 |
UEJIMA TAKASHI;KONDO YOSHIHIRO |
分类号 |
B23B51/02;(IPC1-7):B23B51/02 |
主分类号 |
B23B51/02 |
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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