Title:
DRILL
Document Type and Number:
WIPO Patent Application WO/2016/043098
Kind Code:
A1
Abstract:
A drill in which a rake surface is provided with a negative land, and ridgelines at which the negative land and a flank, the flank and a margin, and the negative land and the margin intersect configure a convex surface in a longitudinal rectangular cross-section, wherein the curvature radius of a second ridgeline convex surface positioned where the flank and the margin intersect is 0.8-1.5 times the curvature radius of a first ridgeline convex surface positioned where the flank and the negative land intersect, and the curvature radius of a fourth ridgeline convex surface positioned where the negative land and the margin intersect is 1.5-3.0 times the curvature radius of the first ridgeline convex surface.
Inventors:
JINDAI MASAAKI (JP)
Application Number:
PCT/JP2015/075543
Publication Date:
March 24, 2016
Filing Date:
September 09, 2015
Export Citation:
Assignee:
SUMITOMO ELEC HARDMETAL CORP (JP)
International Classes:
B23B51/02; B23B51/00
Foreign References:
| JP2014018883A | 2014-02-03 | |||
| JP2014008549A | 2014-01-20 | |||
| JP2007007809A | 2007-01-18 | |||
| US20070160437A1 | 2007-07-12 |
Other References:
See also references of EP 3195967A4
Attorney, Agent or Firm:
NISHIMA, Hideaki et al. (JP)
Hideaki Futajima (JP)
Hideaki Futajima (JP)
Download PDF: