Method for producing cylindrical fine tungsten wire electrode

Abstract

The invention provides an electrolytic machining method for using electrolyte auxiliary impact to produce a cylindrical fine tungsten wire electrode. The method includes the: fixing and clamping tungsten wire electrode producing materials in a clamp; inputting machining data according to the size requirement of the cylindrical fine tungsten wire electrode to prepare for machining; switching on a pressure pump before machining to allow electrolyte to upwardly impact the materials through a sprayer system under the action of the pressure pump; switching on a machine tool to allow the materials to be driven to rotate by a motor, performing electrolytic machining on the materials by a stainless steel plate, and allowing the electrolyte to downwardly impact a electrolytic machining area along the rotating materials and return to an electrolyte tank so as to realize electrolyte circulation. The method has the advantages that electrolytic machining efficiency and quality can be increased by using the electrolyte auxiliary impact, the 'spindle'-shaped structure of the tungsten wire electrode can be avoided, and the cylindrical fine tungsten wire electrode with even diameter can be obtained.

Description

technical field [0001] The invention belongs to the technical field of preparation of micro tool electrodes, in particular to a method for preparing cylindrical micro tungsten wire electrodes. Background technique [0002] The preparation of micro tool electrodes is one of the main research fields in micromachining. The size of micro electrodes directly affects the final machining accuracy of parts, so it is particularly important to prepare micro tool electrodes with high quality. At present, the main preparation processes of micro tool electrodes are: (1) electric discharge machining (WEDM); (2) micro turning process; (3) electrochemical deposition method; (4) LIGA technology processing method; (5) electrolytic machining Law. Among them, electrolytic machining has been proved to be an effective method for preparing micro-tool electrodes. Due to the wide range of sources, excellent high temperature resistance and good machinability, tungsten wire materials are usually use...

AI Technical Summary

Problems solved by technology

Due to the uneven diffusion rate of electrolytic products during hydrostatic processing, especially the WO produced by the reaction and dissolved in the electrolyte 4 2- In the absence of interference from external factors, due to the action of gravity, it will slowly move downward along the outer wall of the tungsten wire immersed in the liquid surface of the electrolyte, absorbing around the tungsten wire to form a diffusion layer and wrapping the lower half of the tungsten wire, tending to "Protect" the tungsten wire at the lower part of the liquid surface, hinder the further progress of the electrolytic reaction, slow down the dissolution rate of the lower half of the tungsten wire wrapped, and the prepared fine tungsten wire electrode is easy to form a "spindle" structure with a small upper part and a larger lower part , affecting the efficiency and quality of electrolytic processing to prepare fine tungsten wire electrodes

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