A method of electrolytic machining of trumpet-shaped micro-hole array

Abstract

The invention discloses an electrochemical machining method of a horn-shaped micro hole array. The electrochemical machining method comprises the following steps of: manufacturing an upper electric insulation template, an auxiliary anode and a lower electric insulation template, wherein the upper electric insulation template, the auxiliary anode and the lower electric insulation template have thesame number of holes, the same arrangement way and the structural characteristic of the through hole cluster, and the axial section of each hole of the through hole cluster of the upper electric insulation template and the through hole cluster of the lower electric insulation template is an isosceles trapezoid having a shorter upper bottom edge, a longer lower bottom edge and bottom angles of 30-70 degrees; laminating and stacking up the upper electric insulation template, a workpiece, the auxiliary anode and the lower electric insulation template closely in order; aligning the axes of all the corresponding through holes; connecting an upper tool cathode and a lower tool cathode with the negative pole of a power supply, and connecting the workpiece with the positive pole of the power supply; and introducing passive electrolyte into an electrolyte channel, and switching on the power supply to perform electrochemical machining. According to the invention, complex and multifarious processes of coating photoresist, exposing, removing the photoresist and the like in an electroforming process are got rid of, the processing efficiency is enhanced, the production cost is reduced, and the electrochemical machining method is more helpful for realizing one-step forming and batch production of the hole cluster with the horn-shaped hole sections.

Description

technical field [0001] The invention relates to an electrolytic machining method, in particular to an electrolytic machining method for horn-shaped tiny hole arrays. Background technique [0002] In the fields of metallurgy, chemical industry, powder, biomedicine, automobile, mining, food and beverage, machinery, textile, papermaking, oil and gas and water treatment, aerospace and other fields, it is often applied to the filtration and screening process of substances. The application effect of filtration and sieving largely depends on the technical performance index of the filter (screen) mesh. The application practice shows that the filter (sieve) mesh with trumpet-shaped hole cross-section has the advantages of small accumulation pressure on the surface of the filter mesh, easy slag unloading and cleaning, no clogging, long filtration cycle and service life, and easy maintenance. The new development trend of fine filter (sieve) mesh. Especially the single-sided trumpet-s...

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Problems solved by technology

However, under conventional electrolysis conditions, the cross-section of micropores produced by electrolysis is often parabolic, and the processing of trumpet-shaped cross-section holes cannot be realized.

The document "Chan Hee Jo, Bo Hyun Kim, Chong Nam Chu. Micro electrochemical machining for complex internal micro features. CIRP Annals - Manufacturing Technology, 58 (2009): 181-184." The method of controlling the parameters of the pulse power supply to realize the electrolytic machining of trumpet-shaped micro-holes, but the production of micro-group electrodes is extremely difficult, and the side wall insulation treatment is extremely difficult, and it is difficult to realize the processing of trumpet-shaped group holes

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