Title:
DRILL
Document Type and Number:
WIPO Patent Application WO/2022/162774
Kind Code:
A1
Abstract:
The drill rotates around a central axis and has a rake face, a flank face, and a thinning face. The flank face is connected to the rake face. The thinning face is connected to each of the rake face and the flank face. A ridgeline between the rake face and the flank face includes an outer cutting edge. A ridgeline between the thinning face and the flank face includes a first thinning portion connected to the outer cutting edge, and a second thinning portion connected to the first thinning portion. When viewed in the direction along the central axis, the first thinning portion is linear and the second thinning portion is curved. When a straight line passing through the central axis and parallel to the first thinning portion is defined as a first straight line, and a straight line perpendicular to the first straight line is defined as a second straight line when viewed in the direction along the central axis, the first thinning portion and a boundary between the first thinning portion and the second thinning portion are located rearward in the rotation direction with respect to the first straight line and are located forward in the rotation direction with respect to the second straight line.
More Like This:
| JP6819946 | Cutting tools |
| WO/2012/157063 | DRILL HEAD FOR DEEP HOLE CUTTING |
| WO/2017/179689 | SMALL-DIAMETER DRILL BIT |
Inventors:
TAKAHASHI YOUICHI (JP)
Application Number:
PCT/JP2021/002781
Publication Date:
August 04, 2022
Filing Date:
January 27, 2021
Export Citation:
Assignee:
SUMITOMO ELECTRIC HARDMETAL CORP (JP)
International Classes:
B23B51/00
Domestic Patent References:
| WO2014175396A1 | 2014-10-30 |
Foreign References:
| JP2017164836A | 2017-09-21 | |||
| JPH0396113U | 1991-10-01 | |||
| JP2019181615A | 2019-10-24 | |||
| JP2012161912A | 2012-08-30 | |||
| JPH07308815A | 1995-11-28 | |||
| JP2011509838A | 2011-03-31 | |||
| JP2019181615A | 2019-10-24 |
Other References:
See also references of EP 4286083A4
Attorney, Agent or Firm:
FUKAMI PATENT OFFICE, P.C. (JP)
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