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

A technology of electrochemical processing and metal parts, which is applied in the direction of electrochemical processing equipment, metal processing equipment, manufacturing tools, etc., can solve the problems of inability to process small-sized apertures, difficulties in making electrodes, and difficulty in realization, achieving small investment and shielding The influence of electric field and the effect of reducing the production cycle

CN101491851BInactive Publication Date: 2010-12-08ZHEJIANG UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2010-12-08
Estimated Expiration
Not applicable · inactive patent

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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 wallof 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 turbulentflow 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.
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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...

Examples

Embodiment 1

[0041] Embodiment 1 (groove shape turbulent flow structure):

[0042] A smooth circular hole 3 with an aperture of 3 mm is processed in advance on the metal part 1 by the electric discharge method. Next, if figure 1 As shown, the gluing spray head 7 is clamped on the machine tool spindle and penetrates into the smooth circular hole 3. The gluing spray head 7 can realize different forms of motion (such as circumferential and radial feed 6) driven by the machine tool motor 4. , The speed of the glue sprayed by the glue nozzle is controlled by an external pressure pump. The insulating glue 2 is made of 352AUV epoxy resin glue, and the curing agent is triethylenetetramine. For every 100 parts of resin, 10 parts of curing agent are used: 3 at 100°C hours to cure.

[0043] After the insulating glue 2 is cured, the metal part 1 is installed on the electrolytic processing machine tool, the workpiece is connected to the positive electrode of the electrolytic processing power supply ...

Embodiment 2

[0045] Embodiment 2 (boss-shaped turbulent flow structure):

[0046] A smooth round hole 3 with a diameter of 2 mm is pre-machined on the metal part 1 by electric discharge machining, and then a layer of insulating glue 2 is applied on the inner wall of the smooth round hole 3 by the same glue coating method as in Example 1. After the insulating glue 2 is cured, coat the outer surface 12 of the metal part with a layer of insulating glue and put it into the electrolyte tank filled with electroforming liquid, and the metal wire 13 for electroforming passes through the central axis of the smooth circular hole on the metal part 1 , the moving speed of the wire 13 for electroforming is controlled by the pay-off wheel and the take-up wheel, as the wire 13 for electroforming moves axially in the hole, the electroforming liquid is brought into the smooth circular hole 3, and a suitable The type of electrolyte is compatible with the metal to be deposited. When the workpiece is connecte...