Title:
ドリルビット及び孔形成方法
Document Type and Number:
Japanese Patent JP6424970
Kind Code:
B2
Abstract:
Provided are a hole formation method enabling the formation of a high-quality hole even when a workpiece material is a difficult-to-machining metal material or a fiber-reinforced composite material and a drill bit used in the method. A drill bit 1 includes at least one cutting edge 10 and a leading flank 20 adjacent to the cutting edge 10, and the leading flank 20 is set to have a surface roughness Ra of 2.0 µm or more and 3.0 µm or less. A hole formation method includes a hole formation step of machining a portion to be processed of a workpiece material W by means of drilling to form a hole while a lubricant material for assisting machining process 2 is in contact with a drill bit 1 and/or the portion to be processed, and in the hole formation step, the drill bit 1 is used.
More Like This:
Inventors:
Yousuke Matsuyama
Takaaki Ogashi
Tokuji Umehara
Shintaro Oyama
Takaaki Ogashi
Tokuji Umehara
Shintaro Oyama
Application Number:
JP2017558566A
Publication Date:
November 21, 2018
Filing Date:
May 19, 2017
Export Citation:
Assignee:
Mitsubishi Gas Chemical Co., Ltd.
International Classes:
B23B51/00; B23B35/00; B23B47/00; B23Q11/10
Domestic Patent References:
| JP2011101910A | ||||
| JP2005224895A | ||||
| JP2004299017A |
Foreign References:
| WO2014157570A1 |
Attorney, Agent or Firm:
Yoshiyuki Inaba
Toshifumi Onuki
Kazuhiko Naito
Toshifumi Onuki
Kazuhiko Naito