发明名称 |
Drilling device and drilling method |
摘要 |
A drilling device is composed so as to drill a drilled object composed of a brittle material with the end of a rotating core bit by using a core bit in which a bit, formed by dispersing and arranging a cemented carbide or super abrasive in a binder phase, is provided on the end of a cylindrical tube, and rotating the core bit around an axis with a direct motor. The drilling device is composed so that the core bit is rotated such that the peripheral velocity at the outer periphery of the bit is 300 m/min or more while the core bit presses against the drilled object at a pressure of 0.6 N/mm<SUP>2 </SUP>or more during drilling.
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申请公布号 |
US7350595(B2) |
申请公布日期 |
2008.04.01 |
申请号 |
US20040478756 |
申请日期 |
2004.09.10 |
申请人 |
MITSUBISHI MATERIALS CORPORATION;NIPPON DIAMOND CO., LTD. |
发明人 |
SATO KUSUO;MAZAKI SHIGERU;IMAOKA TOSHIO |
分类号 |
E21B7/00;B23B47/04;B28D1/04;B28D1/14 |
主分类号 |
E21B7/00 |
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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