Punches and Matrices Recovery for Hot Punching by Electric Arc Hardfacing

Abstract

The technology repair and restoration dies for hot punching is considered. During the overhaul the hammer die, a layer of metal is removed from the side the mirror to the entire depth the cavity of the stream, then the figure the new stream is marked, and then the stream is milled as in a new punch. Sometimes such methods restoring punches as electric arc surfacing welding or deformation with a special punch in the form of a stream are used. When installing inserts in a punch, it is necessary to compensate for the removed metal layer with special linings. Welding electrodes must be selected depending on the requirements for the base metal and service properties the deposited layer – hardness, heat resistance, allowable specific pressures, machinability, heat treatment acceptance, etc.