SU995961A1 - Method of producing bimetallic blanks for hydrostatic extrusion - Google Patents

Description

(54) METHOD FOR OBTAINING BIMETALLIC BLANKS FOR HYDROSTATIC PRESSING

one

The invention relates to the processing of metals by pressure. rather, to the production of extruded products.

A known method of producing articles by hydrostatic pressing, according to which, before assembling the workpiece and the core, the back end of the shell is split into a cone, the resulting gap serves to accommodate the gasket, its rubber ring, the front and back ends of the shell on the assembled workpiece are crimped over the core. The displacement of air from the gap occurs during the initial stage of hydrostatic pressing with the aid of grooves on the rear cone of core 1.

The disadvantage of this method is the instability in the process of removing air from the gap between the shell and the core and, as a consequence, the possibility of air inclusions in the form of "bubbles" on the surface of the pressed product.

A known method of production. bimetallic billets for static pressing, comprising package assembly by installing a core in the shell

with a gap. According to this method, the gap at the rear end of the workpiece is sealed with a rubber ring, and the air in the gap between the core and the shell is displaced in the 5th initial stage of hydrostatic pressing using longitudinal grooves made on the Sa core.

The disadvantage of this method is the poor quality of the adhesion of the shell and core in the oTnpeccoBaijHOM product, due to incomplete displacement from the gap between the core and the shell.

The purpose of the invention is to improve the quality of press articles by improving the strength of the connection between the shell and the core.

The aim is that, according to the method of assembling the bag by inserting the core into the shell, after assembling the bag is placed in a glass of elastic material, and then the glass with the bag is jointly compressed by pushing through the die.

The drawing shows a polyurethane elastic cup 1 with a bag assembled from core 2 and sheath 3 when it is pushed through the crimp die 4.

Claims (1)

Claim A method of producing bimetallic blanks for hydrostatic pressing, which consists in assembling the package by installing the core in the shell ^ characterized in that, in order to improve the quality of the pressed products by improving the bond strength of the core with the shell, after assembly the package is placed in a glass of elastic material, and then the glass together with the package is crimped by pushing through the matrix.