TOOL, DEVICE, AND METHOD FOR DRILLING

WIPO Patent Application WO/2003/002320

A1

A tool, a device, and a method for drilling capable of very easily forming a hole part in a drilled matter by extreme−smoothly discharging chips produced at drilled positions so as to maintain an excellent drilling efficiency, wherein, by using a drilling tool having a shaft with a spiral groove part formed in the outer peripheral surface thereof and a bit fixed to the tip part of the shaft, the hole part is formed in a drilled matter by rotating the shaft at a high speed, whereby the chips can be discharged since air flow is generated by the high speed rotation of the spiral groove part.

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Mazaki, Shigeru (Mitsubishi Materials Corporation, 5-1 Otemachi 1-chom, Chiyoda-ku Tokyo, 100-8117, JP)
Nagai, Isamu c/o Nippon Diamond Co. Ltd. (686-1, Saedo-cho, Tsuzuki-k, Yokohama-shi Kanagawa, 224-0054, JP)

PCT/JP2002/006556

January 09, 2003

June 28, 2002

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MITSUBISHI MATERIALS CORPORATION (5-1 Otemachi 1-chome, Chiyoda-ku, Tokyo, 100-8117, JP)
NIPPON DIAMOND CO., LTD. (686-1, Saedo-cho Tsuzuki-k, Yokohama-shi Kanagawa, 224-0054, JP)
Mazaki, Shigeru (Mitsubishi Materials Corporation, 5-1 Otemachi 1-chom, Chiyoda-ku Tokyo, 100-8117, JP)
Nagai, Isamu c/o Nippon Diamond Co. Ltd. (686-1, Saedo-cho, Tsuzuki-k, Yokohama-shi Kanagawa, 224-0054, JP)

B23B51/02; B23B51/06; B23Q11/00; (IPC1-7): B28D1/14; B23B47/34; B23B51/00

Shiga, Masatake (Shiga International Patent Office, 2-3-1 Yaesu Chuo-ku, Tokyo, 104-8453, JP)

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