Title:
GUN DRILL
Document Type and Number:
WIPO Patent Application WO/2011/132686
Kind Code:
A1
Abstract:
Disclosed is a roughly rod-shaped gun drill (1) provided with a shank portion flow path (4a) which circulates a coolant internally, and a tip portion flow path (4b). On the tip of the gun drill (1) are formed a cutting surface (5), a first flank surface (6a), a second flank surface (6b), a cutting blade (7) and a coolant guide surface (8). A roughly circular first aperture (9a) (a coolant nozzle) is formed in the first flank surface (6a), and a second aperture (9b) (another coolant aperture) is formed spanning the first flank surface (6a) and the coolant guide surface (8), wherein the aperture area of the second aperture is greater than that of the aforementioned first aperture.
Inventors:
NISHIKAWA Koji (11-1 Yoshima-Kogyodanchi, Iwaki-sh, Fukushima 44, 〒9701144, JP)
西川 公志 (〒44 福島県いわき市好間工業団地１１－１ 株式会社タンガロイ内 Fukushima, 〒9701144, JP)
西川 公志 (〒44 福島県いわき市好間工業団地１１－１ 株式会社タンガロイ内 Fukushima, 〒9701144, JP)
Application Number:
JP2011/059662
Publication Date:
October 27, 2011
Filing Date:
April 19, 2011
Export Citation:
Assignee:
TUNGALOY CORPORATION (11-1, Yoshima-Kogyodanchi Iwaki-sh, Fukushima 44, 〒9701144, JP)
株式会社タンガロイ (〒44 福島県いわき市好間工業団地１１－１ Fukushima, 〒9701144, JP)
NISHIKAWA Koji (11-1 Yoshima-Kogyodanchi, Iwaki-sh, Fukushima 44, 〒9701144, JP)
株式会社タンガロイ (〒44 福島県いわき市好間工業団地１１－１ Fukushima, 〒9701144, JP)
NISHIKAWA Koji (11-1 Yoshima-Kogyodanchi, Iwaki-sh, Fukushima 44, 〒9701144, JP)
International Classes:
B23B51/06
Attorney, Agent or Firm:
TANI & ABE, p.c. (6-20, Akasaka 2-chome Minato-k, Tokyo 52, 〒1070052, JP)
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Claims: