Sandvik Ab

Sandvik Rock Tools, Inc.

Megadiamond

Jan Magnus Andersson

Kent Peay

Nathan Anderson

David Alexander McCloskey

Alexander B Graham

A wear resistant, diamond enhanced cutting tool for excavating is disclosed. The cutting tool includes a cutting insert having a diamond coated cutting tip brazed to the cutting insert. The cutting tool is formed by brazing the insert to a tool body with a braze alloy by heating the insert and tool body to a temperature at which the braze alloy melts. The insert and tool body are then cooled to solidify the braze alloy and quenched to cause a martensitic transformation. Finally, the diamond enhanced tip is brazed to the insert while the temperature of the tool body is maintained below a temperature at which the tool body would soften. According to this method, the cutting tool is formed without creating a tempered zone of reduced hardness.

Diamond coated cutting tool insert

A rotary roof mine bit for drilling holes in the roof of a mine, comprises a bit body and an insert mounted in the bit body. The insert is formed of a hard material such as carbide or diamond. A top surface of the insert comprises two top sections which intersect a respective main surface of the insert to define first and second non-linear cutting edge. In one embodiment each cutting edge comprises a plurality of mutually angled segments. In another embodiment each cutting edge is continuously curved. Preferably an axial notch is disposed at a center of the top surface.

Mine roof drill bit and cutting insert therefor

Diamond coated cutting tool insert and method of making same

A breaking or excavating tool has a diamond and/or cubic boron nitride coated cutting insert mounted at the forward end of a tool body which is made of a softer material than the insert. A separately formed retaining member such as a washer, ring or sleeve, made of harder material than the body, is brazed to a front face of the body surrounding the insert to protect the tool body against wear.

Tool comprised of a holder body and a hard insert and method of using

Growing community of inventors

Bristol, VA, United States of America

Jan Magnus Andersson