Concave cutter bit with sacrificial constraint

Details Concave cutter bit with sacrificial constraint Concave cutter bit with sacrificial constraint

1995-12-11

1997-07-08

Bagnell, David J.

Mining or in situ disintegration of hard material

Cutter tooth or tooth head

Rolling or rotatable bit

299113, E21C 35183

Patent

active

056453230

ABSTRACT:
An article comprised of a first material and at least one additional material incorporates a sacrificial constraint. For example, a cutter bit has a bit body that contains a concavity and a sacrificial constraint in a axially first end. A cutter insert or a plurality of cutter inserts are brazed to the bit body at the periphery and in an annular channel or pocket defined by a first surface at the periphery of the concavity, a second surface radially outward form the first surface and radially inward from a sacrificial constraint that extends radially outward at the open end of the concavity. The sacrificial constraint may be removed from the article either prior to use by, for example, machining, or during use by, for example, attrition.

REFERENCES:
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patent: 5417475 (1995-05-01), Graham et al.
patent: 5456522 (1995-10-01), Beach
Properties and Proven Uses of Kennametal Hard Carbide Alloys, p. 43, Copyright 1972.
Brazing Manual, American Welding Society, 1963, pp. 232-236.
Designing with Kennametal, Kennametal Catalog A80-184(10)FO.

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