Title:
DRILL BIT AND HOLE FORMATION METHOD
Document Type and Number:
WIPO Patent Application WO/2017/217183
Kind Code:
A1
Abstract:
Provided are: a hole formation method with which it is possible to form high quality holes even in cases in which the work material is a difficult-to-cut metal material or a fiber-reinforced composite material; and a drill bit to be used in this method. The drill bit 1 is provided with at least one cutting edge 10, and a leading flank 20 adjacent to the cutting edge 10. The surface roughness Ra of the leading flank 20 is set in the range of 2.0 μm to 3.0 μm inclusive. The hole formation method includes a hole formation step in which a hole is formed by cutting the portion to be processed of the work material W by means of drilling while bringing a cutting aid lubricating material 2 into contact with the drill bit 1 and/or the portion to be processed, and the drill bit 1 is used in the hole formation step.
Inventors:
MATSUYAMA YOUSUKE (JP)
OGASHIWA TAKAAKI (JP)
UMEHARA NORITSUGU (JP)
OYAMA SHINTAROU (JP)
OGASHIWA TAKAAKI (JP)
UMEHARA NORITSUGU (JP)
OYAMA SHINTAROU (JP)
Application Number:
PCT/JP2017/018884
Publication Date:
December 21, 2017
Filing Date:
May 19, 2017
Export Citation:
Assignee:
MITSUBISHI GAS CHEMICAL CO (JP)
International Classes:
B23B51/00; B23B35/00
Domestic Patent References:
| WO2014157570A1 | 2014-10-02 |
Foreign References:
| JP2011101910A | 2011-05-26 | |||
| JP2004299017A | 2004-10-28 |
Other References:
See also references of EP 3470154A4
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
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