ULTRA-HIGH PRESSURE SINTERED TOOL HAVING OIL FEED HOLE INSIDE FLANK FACE

Japanese Patent JP2015131387

A

PROBLEM TO BE SOLVED: To prolong a life of a tool for use in high-speed machining of difficult-to-machine material such as hardened steel, heat-resistant alloy and difficult-to-machine cast iron by devising cooling structure of an ultra-high pressure sintered tool having a cBN sintered body or a diamond sintered body on at least a cutting edge, and simultaneously to improve machined surface quality by suppressing generation of a work-affected layer.SOLUTION: An ultra-high pressure sintered tool has: an ultra-high pressure sintered body 4 composed of a cBN sintered body or a diamond sintered body at a corner part of a super-hard base material; and a cutting edge 5 formed on the ultra-high pressure sintered 4. In the ultra-high pressure sintered tool, an oil feed hole 6 where a spout 6b is opened to a flank face 8 just under the corner part of a cutting edge of the tool is arranged. Distance from the spout 6b of the oil feed hole to the cutting edge 5 is set in a range of 0.3 mm or more to 3 mm or less and a tilt angle of the spout with respect to the flank face 8 is set in a range of 20° or more to 70° or less.

OKAMURA KATSUMI
SHIMAMOTO YOSUKE
NASU KAZUCHIKA

JP2015088062A

July 23, 2015

April 23, 2015

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SUMITOMO ELEC HARDMETAL CORP

B23B27/20; B23B1/00; B23B27/10; B23B27/14; B23B29/12

JP2001198708A	2001-07-24
JP2009045715A	2009-03-05

WO2007039955A1	2007-04-12
US20080279644A1	2008-11-13

Naoya Kamata
Bunji Kamada
Yaichiro Nakatani
Takayoshi Tagawa

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