Title:
BORING DRILL AND METHOD OF MACHINING BORING DRILL
Document Type and Number:
Japanese Patent JP2010131736
Kind Code:
A
Abstract:
To provide a boring drill capable of machining a twisting groove with a fixed twisting angle to a drill body even if the drill body is a stepped drill having a small diameter portion and a large diameter portion, and efficiently boring a stepped hole; and a method of machining the boring drill.
In the stepped boring drill having the small diameter portion 12 at a distal end portion of the drill body 1 and the large diameter portion 13 at a proximal end portion, the spiral twisting grooves 12a, 13a having the same twisting angles are continuously formed on the large diameter portion 13 and the small diameter portion 12 of the drill body 11.
COPYRIGHT: (C)2010,JPO&INPIT
Inventors:
SUZUKI KOICHI
Application Number:
JP2008312531A
Publication Date:
June 17, 2010
Filing Date:
December 08, 2008
Export Citation:
Assignee:
KYOWA SEIKO
International Classes:
B23B51/00; B23P15/32; B24B19/04
Domestic Patent References:
| JPH0553817U | 1993-07-20 | |||
| JP2002018621A | 2002-01-22 | |||
| JP2002079408A | 2002-03-19 | |||
| JPS5059693U | 1975-06-03 | |||
| JPS6045607U | 1985-03-30 |
Foreign References:
| US20040018064A1 | 2004-01-29 |
Attorney, Agent or Firm:
Takehiko Suzue
Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Tetsuya Kazama
Katsumura Hiro
Shoji Kawai
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen
Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Tetsuya Kazama
Katsumura Hiro
Shoji Kawai
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen