Title:
DRILL FOR COMPOSITE MATERIAL AS WELL AS MACHINING METHOD USING SAME AND MACHINING APPARATUS USING SAME
Document Type and Number:
WIPO Patent Application WO/2011/049095
Kind Code:
A1
Abstract:
Provided is a drill for composite material, this drill permitting a high quality boring operation wherein almost no burrs or delamination occurs during the boring of a member to be machined which at least partially contains fiber-reinforced composite material. The drill (1) for composite material comprises a tip section wherein a tip cutting edge (5) is formed; a tapered section (4) that is formed by being joined to the rear end portion of the tip section and is further formed into a tapered shape having a diameter difference equal to the difference between the rear end portion outside diameter and the tip portion outside diameter, the aforementioned rear end portion outside diameter being larger than the aforementioned tip portion outside diameter; and a straight section (3) that is formed by being joined to the rear end portion of the tapered section (4) and is further formed so as to have the same diameter throughout the straight section (3) in such a way that the member to be machined can be finished to a bored diameter which is larger than the outside diameter of the rear end portion of the tapered section (4). On the periphery of the tapered section (4), there are formed peripheral cutting edges (7) which are spirally twisted and are set in such a way that a bored diameter increases continuously.
Inventors:
SHIMADA, Hirofumi (61-10 Kawaiwashizuka-cho, Fukui-sh, Fukui 02, 〒9100102, JP)
Application Number:
JP2010/068401
Publication Date:
April 28, 2011
Filing Date:
October 19, 2010
Export Citation:
Assignee:
FUKUI PREFECTURAL GOVERNMENT (17-1, Ote 3-chome Fukui-sh, Fukui 80, 〒9108580, JP)
福井県 (〒80 福井県福井市大手３丁目１７番１号 Fukui, 〒9108580, JP)
福井県 (〒80 福井県福井市大手３丁目１７番１号 Fukui, 〒9108580, JP)
International Classes:
B23B51/08; B23B51/00; B23D77/14
Attorney, Agent or Firm:
KAWASAKI, Yoshiaki (Otemon-Bldg, 1-13 Ote 3-chome, Fukui-sh, Fukui 05, 〒9100005, JP)
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