SU390907A1 - METHOD OF MANUFACTURING A METAL ELECTRODE - TOOL - Google Patents

Description

one

The invention relates to metalworking.

Methods are known for manufacturing metal tool electrodes consisting of two metal layers by spraying a metal onto a model, first forming the working surface of the tool electrode by electrolytic deposition of metal on the matrix followed by spraying the inner surface of the metal layer forming the body of the tool electrode. However, it is characterized by a high labor intensity of manufacture, due to the fact that the deposited layer must be of sufficient thickness in the order of 500-1500 microns, due to the fact that the reverse side of the film must have a roughness sufficient to ensure the mechanical adhesion of the deposited metal with the galvanic one, and roughness, leading to the formation of micropores on the surface of the interface of the layers, impairing the heat removal from the galvanic film, exposed to the discharge, which leads to its penetration, i.e. The thickness of the electroplating film must be sufficient for the heat sink to be provided by the material of this film and the thermal resistance of the interface does not affect the internal heat exchanger; process of heat removal from the surface of the electrode-tool. Besides

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Moreover, in the manufacture of a model from a non-conductive material, it is necessary to introduce into the technological process such operations as applying conductive and separating layers (the latter is necessary in most cases for deposition of conductive models). All this leads to the complication of the manufacturing process of the electrodes and to the increase in labor intensity, since the rate of electrolytic deposition is 1 µm / min.

In order to reduce the complexity of the process and improve the erosion properties

electrode tool on the outer surface of the electrode tool, obtained by evaporation of the metal, after separating it from the model, is applied electroplating film with a thickness of 50-200 microns.

In this case, adhesion with the substrate is carried out due to intercrystalline bonds and there are no micronores at the interface. The model of the electrode tool is made equidiostantially fuller or smaller by the film thickness, the thickness of which is determined by the allowance for machining and the wear of the electrode tool. So, with allowance for processing in 10 Л1М and wear in 1% when working with generators of type ШГМ-125-100,

ShGI-40-440 is enough to apply a film of copper with a thickness of 100-120 microns.

The proposed method makes it possible to abandon the operations of applying a conductive and separation layer, significantly reducing the film thickness from 50 to 200 µm, i.e., reducing the deposition time by 8-10 times and thereby reducing the laboriousness of the process. The deposition of the film is carried out in an electrolyte with leveling additives, which makes it possible to increase the purity of the electrode surface by grade 1-2.

Subject invention

A method of manufacturing a metal electrode tool for electroerosive and electrochemical processing by spraying a metal onto a model, characterized in that, in order to reduce the laboriousness of the process and improve the electroerosion properties of the electrode tool, a galvanized film of electrode material is applied onto its outer surface -instruments with a thickness of 50 t200 MKL1.