发明名称 |
BORING DEVICE AND BORING METHOD |
摘要 |
A boring device,wherein a bit formed by distributedly disposing ultra fine abrasive grains in a binder phase formed by sintering a binder material is fitted to the tip of a cylindrical tube to form a core bit,the core bit is drivingly rotated around the axis thereof by a direct motor to bore a bored object formed with a brittle material by the tip of the rotating core bit,and the core bit is rotated so that,with the core bit pressed against the bored object with a pressure of 0.6 N/mm<sp>2</sp> or higher at the time of boring,the peripheral velocity of the bit on the outer peripheral side is 300 m/min.or faster. |
申请公布号 |
WO02094527(A1) |
申请公布日期 |
2002.11.28 |
申请号 |
WO2002JP04788 |
申请日期 |
2002.05.17 |
申请人 |
MITSUBISHI MATERIALS CORPORATION;NIPPON DIAMOND CO., LTD.;SATO, KUSUO;MAZAKI, SHIGERU;IMAOKA, TOSHIO |
发明人 |
SATO, KUSUO;MAZAKI, SHIGERU;IMAOKA, TOSHIO |
分类号 |
B23B47/04;B28D1/04;B28D1/14;(IPC1-7):B28D1/14;B23B35/00;E21B3/02;B23B51/04 |
主分类号 |
B23B47/04 |
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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