Title:
END MILL MAIN BODY AND END MILL
Document Type and Number:
WIPO Patent Application WO/2019/188135
Kind Code:
A1
Abstract:
Provided is an end mill main body with which highly efficient machining can be performed while damage is suppressed. The present disclosure relates to a ceramic end mill main body constituting a cutting edge portion of an end mill which rotates about an axis. This end mill main body is provided with a chip discharge groove provided at the outer periphery of a tip end portion in such a way as to twist rearward in the direction of rotation with increasing distance from a tip end side toward a rear end side, an outer peripheral cutting edge provided on an outer peripheral side ridge line of the chip discharge groove, and a chamfer surface provided at least in a part of the outer peripheral side ridge line where the chip discharge groove and a flank of the outer peripheral cutting edge intersect.
Inventors:
KITAGAWA SHUSUKE (JP)
Application Number:
PCT/JP2019/009441
Publication Date:
October 03, 2019
Filing Date:
March 08, 2019
Export Citation:
Assignee:
NGK SPARK PLUG CO (JP)
International Classes:
B23C5/10; B23C5/16
Domestic Patent References:
| WO2018003948A1 | 2018-01-04 |
Foreign References:
| JPH07204921A | 1995-08-08 | |||
| JPS63100115U | 1988-06-29 | |||
| JPH0457311U | 1992-05-18 | |||
| JP2007307673A | 2007-11-29 | |||
| US20170144234A1 | 2017-05-25 |
Attorney, Agent or Firm:
NAGOYA INTERNATIONAL PATENT FIRM (JP)
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