Patent ID: 6029544
Filing Date: 2000-02-29
Classification: B23B,B23P,E21B,Y10S,Y10T

Abstract:
A method for making inserts for cutting tools comprising;a. fabricating a generally slab-shaped matrix of brazable material,b. forming in an upper wall surface of said matrix at least one depression having a perimeter lying in said upper wall surface,c. filling said depression with grains of refractory material selected from the group consisting of diamond and cubic boron nitride to thereby form a filled matrix having no more than one wall of said filled matrix exposed,d. subjecting said filled matrix to heat and pressure sufficient to cause grains of said refractory material to fuse to one another and to adjacent walls of said depression, thereby forming a polycrystalline body, ande. making a cut in said filled matrix to form at least one insert having a region of polycrystalline material exposed, said cut being made into said matrix along a line parallel to a segment of said perimeter of said depression, said cut being spaced apart from at least three side walls of said depression, whereby said insert has at least three supporting side walls and a base wall made of brazable matrix material.