发明名称 |
Rotary drill bit having cutting insert with a notch |
摘要 |
A rotary drill bit insert that includes an elongate body that is rotatable about a central axis wherein the elongate body has a pair of symmetrical halves symmetrical about the central axis. The elongate body contains a central notch disposed between the symmetric halves of the elongate body. Each symmetrical half includes a leading face and a top surface that has a leading surface and a trailing relief surface wherein the leading surface and the trailing relief surface are contiguous and non-coplanar. Each half also has a leading cutting edge at the intersection of the leading face and the leading surface of the top surface. The leading surface is inclined at a constant angle of inclination in a radial direction with respect to a first radial line projecting from the central axis, and the leading surface being inclined downwardly and rearwardly from the leading cutting edge. |
申请公布号 |
ZA200702429(B) |
申请公布日期 |
2008.09.25 |
申请号 |
ZA20070002429 |
申请日期 |
2005.09.12 |
申请人 |
KENNAMETAL INC. |
发明人 |
ALCOM, LYNN A;WOODS, GERALD L. |
分类号 |
E21B |
主分类号 |
E21B |
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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