Title:
DEEP-HOLE-BORING DRILL HEAD AND GUIDE PAD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2011/142370
Kind Code:
A1
Abstract:
In order to increase the durability of a deep-hole drill head, wherein a cutting blade and a guide pad are brazed to a head body, and to cause spiral marks to not arise even after long-term use, disclosed is a deep-hole-boring drill head (1)—which is provided with a head body (3), a cutting blade (11), a first guide pad (21), and a second guide pad (23)—wherein a flat land is provided to the peripheral edge (16) of the end of the cutting blade (11), a first moving radius (a) from the rotational center (P) of the head body (3) to the peripheral edge (16) of the end of the cutting blade (11) and a third moving radius (c) from said rotational center (P) to the primary guide surface (24) of the second guide pad (23) are equivalent, and a second moving radius (d) from the rotational center (P) of the head body (3) to the primary guide surface (22) of the first guide pad (21) is smaller than the first moving radius (a). The guide pads are, in the primary guide surfaces thereof, provided with a first region having a first radius that is the same length as the radius of the inner peripheral surface of the hole, and a second region having a moving radius that is smaller than said first radius, and the first region is wide in the direction towards the back end from the leading edge of the primary guide surface.
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Inventors:
TSUKAMOTO, Keizo (1-71 Akago, Yokoyama-cho, Anjo-sh, Aichi 45, 〒4460045, JP)
塚本 恵三 (〒45 愛知県安城市横山町赤子１番地７１ 株式会社アヤボ内 Aichi, 〒4460045, JP)
塚本 恵三 (〒45 愛知県安城市横山町赤子１番地７１ 株式会社アヤボ内 Aichi, 〒4460045, JP)
Application Number:
JP2011/060789
Publication Date:
November 17, 2011
Filing Date:
May 10, 2011
Export Citation:
Assignee:
AYABO CORPORATION (1-71, Akago Yokoyama-cho, Anjo-sh, Aichi 45, 〒4460045, JP)
株式会社アヤボ (〒45 愛知県安城市横山町赤子１番地７１ Aichi, 〒4460045, JP)
TSUKAMOTO, Keizo (1-71 Akago, Yokoyama-cho, Anjo-sh, Aichi 45, 〒4460045, JP)
株式会社アヤボ (〒45 愛知県安城市横山町赤子１番地７１ Aichi, 〒4460045, JP)
TSUKAMOTO, Keizo (1-71 Akago, Yokoyama-cho, Anjo-sh, Aichi 45, 〒4460045, JP)
International Classes:
B23B51/06; B23B51/00
Attorney, Agent or Firm:
KONISHI, Tomimasa (Marunouchi Estate Bldg, 17-12 Marunouchi 2-chome,Naka-ku, Nagoya-shi, Aichi 02, 〒4600002, JP)
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Claims: