Title:
CUTTING TOOL
Document Type and Number:
WIPO Patent Application WO/2020/255315
Kind Code:
A1
Abstract:
A drill (1) is equipped with a body (10) and a head (30). The body (10) comprises cemented carbide and the head (30) comprises PCD. Spiral coolant passages (17, 18) are provided inside the body (10). Oil holes (25, 26) are provided in the body-side joint surface of the body (10). The oil holes (25, 26) are the outlets of the coolant passages (17, 18). The coolant passages (37, 38) provided inside the head (30) extend from the oil holes (45, 46) provided at the tip (31) toward the rear end (32). The head-side joint surface of the head (30) is joined to the body-side joint surface. Two oil holes are provided in the head-side joint surface. The two oil holes are the inlets of the coolant passages (37, 38) and communicate with the oil holes (25, 26) in the body-side joint surface.
Inventors:
OSAWA JIRO (JP)
YODA TOMONORI (JP)
YODA TOMONORI (JP)
Application Number:
PCT/JP2019/024400
Publication Date:
December 24, 2020
Filing Date:
June 20, 2019
Export Citation:
Assignee:
OSG CORP (JP)
International Classes:
B23B51/06; B23B51/00; B23B51/02
Foreign References:
| JP2017513725A | 2017-06-01 | |||
| US20160107264A1 | 2016-04-21 | |||
| JPS642807A | 1989-01-06 | |||
| JPS57189710U | 1982-12-01 | |||
| JPS61506A | 1986-01-06 | |||
| JP2012250343A | 2012-12-20 |
Other References:
See also references of EP 3988232A4
Attorney, Agent or Firm:
YAMAMOTO, Hisashi et al. (JP)
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