DRILL BIT AND HOLE FORMATION METHOD - MITSUBISHI GAS CHEMICAL CO

Title:

DRILL BIT AND HOLE FORMATION METHOD

Document Type and Number:

WIPO Patent Application WO/2017/217184

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 surface (a leading flank 20 and a trailing flank 30) positioned in the vicinity of the cutting edge 10. A recess (groove 40) exhibiting a prescribed planar shape is provided in the surface. 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 portion to be processed, and the drill bit 1 is used in the hole formation step.

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Inventors:

MATSUYAMA YOUSUKE (JP)
OGASHIWA TAKAAKI (JP)
UMEHARA NORITSUGU (JP)
OYAMA SHINTAROU (JP)

Application Number:

PCT/JP2017/018905

Publication Date:

December 21, 2017

Filing Date:

May 19, 2017

Export Citation:

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Assignee:

MITSUBISHI GAS CHEMICAL CO (JP)

International Classes:

B23B51/00; B23B35/00; B23B47/00

Domestic Patent References:

WO2014157570A1	2014-10-02
WO2016063893A1	2016-04-28

Foreign References:

JP2009148865A	2009-07-09
JPH08511208A	1996-11-26
JP2001287110A	2001-10-16
EP2431565A1	2012-03-21

Other References: