Disk cutter

Abstract

A disk cutter including an annular disk-shaped base adapted to be driven about an axis of rotation, a plurality of tip supports formed along the outer circumference of the base integrally therewith so that a gullet is defined between adjacent ones of the tip supports, and a plurality of cutting tip inserts respectively fixed to the tip supports. Each of the cutting tip inserts has a pair of rakes inclined from the opposite side surfaces of each tip insert to the center of the thickness of each tip insert so as to define a first V-shaped groove, and a pair of flanks inclined from the opposite side surfaces of each tip insert to the center of the thickness of each tip insert so as to define a second V-shaped groove. The pair of rakes are formed in symmetry with respect to the center of the thickness of each tip insert, and the pair of flanks are also formed in symmetry with respect to the center of the thickness of each tip insert.

1 . A method of producing a disk cutter, comprising the steps of: 
 preparing an annular disk-shaped base adapted to be driven about an axis of rotation;    forming a plurality of tip supports along the outer circumference of said base so that a gullet is defined between adjacent ones of said tip supports;    preparing a plurality of cutting tip inserts, each of said cutting tip insets having a pair of rakes inclined from the opposite side surfaces of each tip insert to the center of the thickness of each tip insert so as to define a first V-shaped groove;    brazing said cutting tip inserts to said respective tip supports so that said rakes are inclined radially inwardly and rearwardly with respect to the rotational direction of the disk cutter; and    grinding each of said brazed tip insets to form a pair of flanks inclined from opposite side surfaces of each tip insert to the center of the thickness of each tip insert so as to define a second V-shaped groove.    
   
   
       2 . The method of producing a disk cutter according to  claim 1 , wherein said rakes are formed simultaneously with sintering of each tip support in a die.  
   
   
       3 . A method of producing a disk cutter according to  claim 1 , wherein said rakes are formed by grinding each of sintered tip insert.