发明公开
- 专利标题： NONAXISYMMETRICAL BLADE DRILL
- 专利标题（中）： 非对称叶片钻
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申请号： EP07715142.1申请日： 2007-02-23
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公开(公告)号： EP1992437A1公开(公告)日： 2008-11-19
- 发明人: NISHIWAKI, Nobuhiko , HORI, Sankei
- 申请人： National University Corporation Tokyo University of Agriculture and Technology
- 申请人地址： 3-8-1, Harumi-cho Fuchu-shi, Tokyo 183-8538 JP
- 专利权人： National University Corporation Tokyo University of Agriculture and Technology
- 当前专利权人： National University Corporation Tokyo University of Agriculture and Technology
- 当前专利权人地址： 3-8-1, Harumi-cho Fuchu-shi, Tokyo 183-8538 JP
- 代理机构： Hassa, Oliver Michael
- 优先权： JP2006046694 20060223
- 国际公布： WO2007097474 20070830
- 主分类号： B23B51/00
- IPC分类号： B23B51/00
摘要：
The present invention provides a drill for making a dilled hole having a high circularity. The axial asymmetric edge drill has a chisel portion formed in the tip center so that the chisel portion center matches with the drill shaft center. At least one of the cutting edges is in an axial asymmetric position with another cutting edge across the drill shaft center. The outline of the edges of the drill forms a circular arc.
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