Radial tool with superhard cutting surface

摘要

A non-rotating mining cutter pick has a shank portion with a non-circular cross-section, a head portion including a tip region distal from the shank portion, a shoulder portion separating the shank portion from the head portion, and a cutting insert mounted at a front end of the tip region. The cutting insert includes a body formed of tungsten carbide and an element formed of a superhard material, such as PCD or other material having a prescribed knoop hardness. At least a portion of a first surface of the element is exposed on a cutting surface of the cutting insert, which improves wear properties of the mining cutter pick. The element is fused to the body of the cutting insert, preferably in a high pressure-high temperature (HPHT) process. A method of manufacture and a cutting machine incorporating the non-rotating mining cutter pick on the rotatable element are also disclosed.

主权项

1. A non-rotating mining cutter pick, comprising:
a shank portion with a non-circular cross-section; a head portion including a front portion and a tip region distal from the shank portion and including opposing flank surfaces connecting a front surface to a rear surface; and a cutting insert mounted at a front end of the tip region with a cutting surface oriented on a same side of the head portion as the front portion, wherein the cutting insert includes a body formed of tungsten carbide and an element formed of a superhard material, wherein the element formed of the superhard material extends into the tungsten carbide body and is fused to the tungsten carbide body, wherein the element formed of the superhard material includes a first surface and an opposing second surface, wherein at least a portion of the first surface of the element formed of the superhard material is exposed on the cutting surface of the cutting insert and, at a periphery, is flush with adjacent portions of the cutting surface of the cutting insert, wherein at least a portion of the front surface of the head portion is formed of a superhard material, and wherein the at least a portion of the front surface of the head portion formed of the superhard material is discontinuous from the element formed of the superhard material that is exposed on the cutting surface of the cutting insert such that a portion of the tip region is exposed and separates the discontinuous superhard materials.