Title:
DRILL, AND METHOD FOR MANUFACTURING CUT WORKPIECE
Document Type and Number:
WIPO Patent Application WO/2023/181814
Kind Code:
A1
Abstract:
There is a demand for drills with high rigidity and good chip evacuation while reducing chipping on the tip side. A drill according to one aspect of the present disclosure has a body extending along a rotation axis. The body has a cutting edge, a thinning groove, a discharge groove, a tip surface, a first honing surface, and a second honing surface connected to the first honing surface. The first honing surface has a first portion which is connected to the second honing surface and the width of which in tip view progressively increases toward the second honing surface. The second honing surface has a second portion which is connected to the first honing surface and the width of which in tip view progressively increases toward the first honing surface.
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Inventors:
KURODA MASAHIKO (JP)
Application Number:
PCT/JP2023/007565
Publication Date:
September 28, 2023
Filing Date:
March 01, 2023
Export Citation:
Assignee:
KYOCERA CORP (JP)
International Classes:
B23B51/00
Domestic Patent References:
| WO2020054702A1 | 2020-03-19 |
Foreign References:
| JP2002301612A | 2002-10-15 | |||
| JPS63237809A | 1988-10-04 | |||
| JPS5414089A | 1979-02-01 | |||
| JP2019209439A | 2019-12-12 | |||
| JP2021088007A | 2021-06-10 |
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (JP)
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