Invention Grant
- Patent Title: Drill and method for manufacturing cut product using same
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Application No.: US14787092Application Date: 2014-04-24
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Publication No.: US09962773B2Publication Date: 2018-05-08
- Inventor: Kenichirou Koga , Makoto Ide
- Applicant: KYOCERA Corporation
- Applicant Address: JP Kyoto
- Assignee: KYOCERA Corporation
- Current Assignee: KYOCERA Corporation
- Current Assignee Address: JP Kyoto
- Agency: Procopio Cory Hargreaves and Savitch LLP
- Priority: JP2013-093769 20130426; JP2013-177534 20130829; JP2013-192860 20130918; JP2013-192861 20130918
- International Application: PCT/JP2014/061610 WO 20140424
- International Announcement: WO2014/175396 WO 20141030
- Main IPC: B23B51/02
- IPC: B23B51/02

Abstract:
A drill according to an embodiment of the present invention has a pair of main cutting edges positioned at a front end of a drill body, a pair of first chisel edges each extending from the pair of main cutting edges toward a rotation axis, and a second chisel edge positioned between the pair of first chisel edges and intersecting with the rotation axis of the drill body. When viewing a locus of rotation of the pair of first chisel edges and a locus of rotation of the second chisel edge in a cross section taken so as to include the rotation axis, the respective locus of rotation of the pair of first chisel edges have a rectilinear shape, and respective imaginary straight lines obtained by extending the locus of rotation of the pair of first chisel edges toward the rotation axis are positioned further to a rear end side of the drill body than the locus of rotation of the second chisel edge.
Public/Granted literature
- US20160074944A1 DRILL AND METHOD FOR MANUFACTURING CUT PRODUCT USING SAME Public/Granted day:2016-03-17
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