Electro-chemical machining technology of inner hole wall turbulence structure of metal parts

Abstract

The invention discloses an electrochemical machining process for an inner hole wall surface turbulent flow structure of a meal part. The machining process comprises: firstly, processing a smooth circular hole with an aperture of more than or equal to 2 millimeters on a position to be processed of the metal part, using a glue spreading spray head to coat a layer of insulating glue on the hole wall of the circular hole according to a set shape, and arranging a metal wire on a central axial line of the circular hole after the insulating glue of the hole wall is cured; and obtaining the turbulent flow structure by processing on the hole wall through electrolysis or electroforming, and finally using an insulating glue detergent to remove the prior cured insulating glue. The electrochemical machining process adopts special equipment and directly coats the insulating glue on the inner hole wall surface of the part as required, can effectively shield the influence of an electric field during electrochemical machining, save preparation of tool electrodes during electrochemical machining, and reduce the production period and the production cost; and simultaneously the electrochemical machining process can coat graphs with complex structures by controlling the motion track of the glue spreading head so as to be capable of processing different turbulent flow structures.

Description

(1) Technical field [0001] The invention relates to an electrochemical machining process for a turbulent flow structure on the inner hole wall of a metal part, and belongs to the technical field of special machining. (2) Background technology [0002] In order to reduce energy consumption, the "Eleventh Five-Year" national policy proposes to reduce energy consumption by 20%, so it is particularly important to develop efficient and energy-saving energy-consuming equipment, such as used in aerospace, microelectronic cooling, energy and chemical industry, waste heat High-efficiency energy-saving heat exchangers, condensers, preheaters, etc. in the fields of recycling, air conditioning and refrigeration, and solar energy. In order to improve the heat transfer performance of the equipment and reduce energy consumption, the researchers have proved through analysis that processing several cooling channels in the heat transfer components (such as processing smooth and smooth straigh...

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Problems solved by technology

(2) Machine tool-assisted engraving and cutting method [Chinese patent: CN 1038360C] is that the knife head of the machine tool drives the engraving knife to insert the knife box along the radial direction, and the knife box is connected with the translation rod with a threaded button. During the forward movement, the carving knife is pushed out by the cone of the cutter head and carved into the pipe wall. With the movement of the translation rod, the carving knife carves grooves on the pipe wall, and the contact between the cutting head and the pipe wall can be processed. Grooves of different depths, this processing method cannot process small-sized holes because the translation rod and the tool are installed and moved together

(3) The laser honing method is completed through three processes of rough honing, laser modeling and fine honing. Laser processing is used to process the surface microstructure, and then honing is performed to remove "excess metal" around the microstructure. This processing method requires Using a special laser, the cost is higher

(4) Corrosion processing method [Patent No.: US 6,303,193B1] is based on the principle of electrochemical dissolution of metal materials in the energized state, using specially designed tool electrodes, controlling processing time and processing voltage to achieve microstructure processing, but In the past processing methods, it is necessary to make special tool electrodes, and it is difficult or difficult to make electrodes with complex shapes.

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