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Title:
DRILL AND CUTTING METHOD
Document Type and Number:
WIPO Patent Application WO/2024/004075
Kind Code:
A1
Abstract:
This drill comprises a flank surface, a rake surface, and a main cutting edge on the ridge between the flank surface and the rake surface. The main cutting edge includes a first curved part having a curved shape and continuous with the flank surface, and a second curved part having a curved shape and continuous with the rake surface, in a cross-sectional view orthogonal to the extending direction of the main cutting edge. A first radius of curvature of the first curved part is greater than a second radius of curvature of the second curved part.

Inventors:
MAKIUCHI YUSUKE (JP)
Application Number:
PCT/JP2022/025935
Publication Date:
January 04, 2024
Filing Date:
June 29, 2022
Export Citation:
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Assignee:
SUMITOMO ELECTRIC HARDMETAL CORP (JP)
International Classes:
B23B51/00
Domestic Patent References:
WO2020075698A12020-04-16
Foreign References:
JPH09500335A1997-01-14
JP2002370107A2002-12-24
JP2015123552A2015-07-06
JP2014008549A2014-01-20
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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