Radial tool with superhard cutting surface

E - Fixed Constructions – 21 – C

Patent

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Details

E21C 35/183 (2006.01)

Patent

CA 2749003

A non-rotating mining cutter pick (10) has a shank portion (12) with anon-circular cross-section, a head portion (16) including a tip region (28) distal from the shank portion (12), a shoulder portion (14) separating the shank portion (12) from the head portion (16), and a cutting insert (30) mounted at a front end (32) of the tip region (28). The cutting insert (30) includes a body (34) formed of tungsten carbide and an element (36) formed of a superhard material, such as PCD or other material having a prescribed knoop hardness. At least a portion of a first surface (40) of the element (36) is exposed on a cutting surface (38) of the cutting insert (30), which improves wear properties of the mining cutter pick (10). The element (36) is fused to the body (34) of the cutting insert (30), 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. ??

Un pic (10) d'exploitation minière non rotatif comprend une partie formant tige (12) de section transversale non circulaire, une partie formant tête (16) comprenant une zone formant pointe (28) distante de la partie formant tige (12), une partie d'épaulement (14) séparant la partie formant tige (12) de la partie formant tête (16), et une pièce de coupe rapportée (30) montée sur une extrémité avant (32) de la zone formant pointe (28). La pièce de coupe rapportée (30) comprend un corps (34) en carbure de tungstène et un élément (36) fait d'un matériau extra-dur tel que le PCD ou autre, ayant une dureté Knoop prédéterminée. Au moins une partie d'une première surface (40) de l'élément (36) est exposée sur une surface de coupe (38) de la pièce de coupe rapportée (30), qui améliore les propriétés d'usure du pic d'exploitation minière (10). L'élément (36) est assemblé par fusion au corps (34) de la pièce de coupe rapportée (30), de préférence par un procédé haute pression haute température (HPHT). Cette invention concerne également un procédé de fabrication et une machine de coupe intégrant le pic d'exploitation minière non rotatif sur l'élément rotatif.

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