Title:
BALL END MILL AND CUTTING INSERT
Document Type and Number:
WIPO Patent Application WO/2020/245878
Kind Code:
A1
Abstract:
The invention is provided with large-diameter blades 111a to 111e that are formed in an arcuate shape of a greater radius of curvature than a ball radius R1. Cutting of a flat surface by each of the large-diameter blades 111a to 111e therefore makes it possible to improve the surface roughness of a machined surface as compared to if the flat surface is cut with ball blades formed in an arcuate shape of a single radius of curvature. Furthermore, because each of the large-diameter blades 111a to 111e is formed in an arcuate shape, cutting of a curved surface with each of the large-diameter blades 111a to 111e makes it possible to improve the surface roughness of the machined surface as compared to if the curved surface is cut with a rectilinear cutting blade. Accordingly, the pick feed can be increased during cutting of the flat surface and curved surface by each of the large-diameter blades 111a to 111e. It is therefore possible to improve the machining efficiency in cutting both the flat surface and the curved surface.
Inventors:
FUJII YASUHITO (JP)
ENDOH YASUYUKI (JP)
ENDOH YASUYUKI (JP)
Application Number:
PCT/JP2019/021992
Publication Date:
December 10, 2020
Filing Date:
June 03, 2019
Export Citation:
Assignee:
OSG CORP (JP)
International Classes:
B23C5/10
Foreign References:
| JP2004090171A | 2004-03-25 | |||
| JPH07132407A | 1995-05-23 | |||
| JP2002126935A | 2002-05-08 | |||
| US6684742B1 | 2004-02-03 | |||
| JP2016179543A | 2016-10-13 | |||
| JPH07132407A | 1995-05-23 |
Other References:
See also references of EP 3981530A4
Attorney, Agent or Firm:
PATENT FIRM SHINMEI CENTURY (JP)
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