B - Operations – Transporting – 23 – B
Patent
B - Operations, Transporting
23
B
29/45
B23B 27/14 (2006.01)
Patent
CA 2036930
In a cutting insert, a base plate is formed into a polygonal configuration having a plurality of corners. At least one cutting-edge element is mounted on an upper sur- face of the corner of the base plate. The cutting-edge element is composed of a high-hardness sintered section and a super-hard sintered section which are superimposed one upon the other. The cutting-edge element is brased to the upper surface of the corner of the base plate under such a condition that the super-hard sintered section is exposed to an upper surface of the base plate. The super-hard sintered section has its upper surface which is formed therein with a chip breaker having a surface roughness within a range of from 0.5S to 10S. Furthermore, in a polygonal cutting insert having a plurality of corners which have formed therein respective chip breakers, at least one of the chip breakers is different in form from the remaining chip break- ers.
Fukuoka Hitoshi
Kodera Yuichi
Sato Katuhiko
Marks & Clerk
Mitsubishi Materials Corporation
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