TOOL FOR CRUSHING MINERAL AND ARTIFICIAL MATERIALS Russian patent published in 1997 - IPC

FIELD: material crushing equipment. SUBSTANCE: tool has body with seat and insert made of hard-alloy material. Insert is made up of working part for contact with material to be crushed and tail-piece. Tail-piece is in the form of body of revolution and is installed in body seat coaxially with clearance for location of solder and creation of soldered joint between tail-piece of insert and body. At least portion of tail-piece surface is of convex configuration and is formed by rotation of section of curve described by relation of not lower than second order around longitudinal axis of body seat symmetry. Dimension of clearance between surfaces of insert tail-piece and seat walls which are formed by rotation of corresponding sections of curves around respective axes is reduced in direction towards working part of insert. EFFECT: high efficiency. 19 cl, 10 dwg