Method for improving completeness integrity of electrospark wire-electrode cutting finished surface

Abstract

The invention discloses a method of promoting the integrity of the cutting and machining surface of the electrical discharge wire. The method is characterized by comprising two steps including preliminary cutting and finish cutting. The water-soluble working liquid is utilized as the cooling medium in the preliminary cutting. In the finish cutting, the oil liquid is poured or the oil mist is sprayed into the discharge cutting seam under the high pressure to be served as the discharge medium for cooling the discharge surface, thereby achieving the purpose of promoting the integrity of the cutting surface and eliminating the surface softening layer caused by electric erosion or electrolysis. The invention is different from LSWEDM using the anti-electrolysis power supply to solve the problem, and complete the wire cutting with the higher surface integrity only by changing the working medium and utilizing the high-frequency power supply with the ordinary peak voltage and peak current, thereby being favorable for promoting the machining quality of the electrical discharge wire. The method also has the advantages of simple method, easy implementation, low investment and quick results.

Description

technical field [0001] The invention relates to an electric discharge machining technology, especially an electric discharge machining method that can greatly improve the integrity of the processed surface and prevent the softening layer on the cutting surface. A method of medium cooling to improve surface integrity in wire-cut electric discharge machining. Background technique [0002] As we all know, there are currently two main processing methods for wire electric discharge cutting: the first is to use working fluid with certain conductivity (most of them are emulsion containing about 5% base oil) without pressure casting On the surface of the slit, molybdenum wire is used as the electrode wire, and the high-speed wire electric discharge cutting (HSWEDM) technology is used for cutting through bidirectional reciprocating high-speed wire (wire speed 6-10m / s). The second is to use deionized resin to remove ions in pure water and spray it into the discharge gap for cooling b...

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that a "softened layer" is easily produced on the surface due to electric corrosion (electrolysis) in the wire electric discharge cutting using water-soluble working fluid as the medium, and the problem that affects the integrity of the processed surface is invented. Method for processing and cooling with different working media to improve the surface integrity of electric discharge wire cutting

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