SU1585400A1 - Apparatus for electrochemical working of elongated articles - Google Patents

Abstract

This invention relates to electroplating. The purpose of the invention is to increase the productivity and quality of processing of curved circular sections by ensuring a constant electrode spacing and eliminating short circuits and jamming of products. The device contains a technological bath 1 with through holes in the form of rings 9 in the end walls, electrodes, a current supply system in the form of tires 10, an electrolyte circulation loop, and a mechanism for moving products in the form of transport rollers 14. The electrodes are made in the form of a flexible assembly of cables 5 with electrode bushings 7 and spacing insulating bushings 8, evenly spaced around the circumference of the bore holes. The diameter of the insulator sleeves 8 exceeds the diameter of the electrode sleeves 7 by two times the interelectrode gap. The flexible collecting electrode can be installed with twisting the cables 5 along a helical line with a pitch not exceeding the length of the working part of the electrode multiplied by the number of cables. The insulator sleeves 8 have a length equal to twice the distance between the electrodes and are made with a spherical outer surface with a radius equal to the distance between the electrodes. Fixed rings 9 are installed along the length of the electrode. 1 Cpl-ly, 2 ill.

Description

openings in the form of rings 9 in the end walls 5 electrodes, a current supply system in the form of pin 10, an electrolyte circulation loop, and a mechanism for peremegtsen products in the form of transport rollers 14. The electrodes are made in the form of a flexible assembly of cables 5 with electrode bushings 7 and distant insulating sleeves, insulators 8, equally-jg dimensionally spaced around the aperture holes. The yala-meter bushings-insulators 8 exceeds the diameter of the electrode bushings 7 by a double value.

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interelectrode gap. Flexible Hbrfi electrode can be installed with twisting cables 5 along a helical line with a step of more than the length of the working part of the electrode multiplied by the number of cables. Insulator sleeves 8 have a length equal to twice the interelectrode distance and are made with a spherical outer surface over a radius equal to the interelectrode distance. Fixed rings 9 are installed along the length of the electrode. 1 cf, f-crystals, 2 ill.

The invention relates to electroplating, and may find application in coating deposition, anodizing, trochemical polishing and other types of electrochemical machining.

The purpose of the invention is to increase the productivity and quality of processing curved circular sections by ensuring a constant interelectrode distance and eliminating short tightening and tightening of the products.

Fig 1 shows a diagram of the device | in fig. 2 sections of the electrode.

The device consists of a technological bath 1 with installed 1 in it along the axis of movement of the processed products with a flexible electrode. The electrode consists of three consecutive sections, connected mechanically into a single assembly and disconnected electrically. Sections 2 and 3 are connected to the positive pole of the DC source, and middle section 4 is connected to the negative pole of the current source.

All sections are identical in construction and consist of a series of flexible metal cables 5, evenly spaced around the circumference of the bath apertures and fixed ends 1-1 and 3 of the dielectric installation flanges.

6. On the cables are profiled metal electrode sleeves.

7. At the groove of each sleeve, the spacing of the sleeve-isolator-Torahs 8 made of a dielectric wear-resistant material, such as caprolactam, is set. Fixing metal rings 9 are installed evenly in the section section.

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five

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with passage holes for cables. The rings are connected to the flexible power supply tires 10 via the shanks 11.

The main dimensional characteristics of the parts of the flexible electrode are related to the diameter of the workpiece and the interelectrode distance.

The number of flexible arms and the diameter of the electrode bushings are calculated so that the distance from. the surface of two sleeves of neighboring branches to the most distant point of the surface of the product being processed is greater than two interelectrode distances. The outer diameter of the insulator bushings is greater than the diameter of the electrode bushings by a double electrode spacing. The diameter of the cable mount is equal to the sum of the diameter of the product to be treated and the outer diameter of the insulator sleeve.

The insulator bushings are made with a toroidal outer surface with a radius equal to half the thickness of the bush. The length of the electrode bushings is assumed to be 3-5 thickness of the bushing sleeve. All three sections of the electrode are connected in series through dielectric inserts-suspensions 12. Along the length, the electrode is suspended in a horizontal position on flexible suspensions 13 in a twisted state relative to the beginning of each section in increments not exceeding the length of the working section 4 multiplied by the number of cables.

From the inlet and outlet side, the bath is equipped with a toespo - tribal rod 14 and conical centering II bushings 15, with end caps.

sides to the bath prim1) 1, drain chambers 16 connected by pipes 17 with a national electrolyte tank of 18. Next, the pump 19, the filter 20, and the supply pipe 21 are located in the electrolyte circulation circuit. The device operates as follows.

The processed product of round section transport rollers 14 through the centering sleeve 15 from the inlet side is fed into the working area of the process bath 1 and moves inside the electrode, the passage sequentially sections 2, 4 and 3. In the area of electrochemical processing sets the specified mode. Due to the passage of current from sections 2 and 3 through the electrolyte and the product, section 4 creates a mode

necessary anodic treatment. With continuous movement, the product rests on the insulator B sleeves and deforms the electrode, bending the cables 5 in accordance with its own curvature. The displacement of the electrode is provided by a system of flexible spring hangers 13 and flexible tires 10. Thus, the electrode acquires the length of the processed product which dynamically changes in accordance with the curvature of the moving product, in each segment, the correct cross section of the inscribed circle and the constant interelectrode distance from the product surface and electrode volts lkami 7. Due to the fact -that electrode mounted twisting branches of the helix is achieved uniform treatment of all portions of the surface of the article.

When the front end of the machined body approaches the output end of the bath, it is centered in the conical sleeve 15 and enters the transport rollers 14,

The working solution — electrolyte — flows from the bath 1 through the gaps between the product and the opening of the end walls into the drainage chambers 16 and through the pipeline

water 17 enters the collection tank 18, from where the pump 19 through the filter 20 through the supply pipe 21 enters the bath 1.

The present invention allows anodic descaling of metal rods after their heat treatment without prior dressing, which greatly simplifies the process.

 the invention

Claims (1)

1. A device for the electrochemical treatment of long products, containing a technological bath with passage holes in the end walls, an electrode system, a current supply system, an electrolyte circulation loop, and an article transfer mechanism, characterized in that in order to improve the performance and quality of processing of curved products circular cross-section by providing a constant inter-electrode short-circuit distance and wedging of the product, the electrode system is made in the form of electrical flanges therefore connected and fixed between nn- mi. along their circumference there are cables with separating metal rings fixed on them by groups of alternating conductive sleeves and insulator sleeves, one of the extreme flanges rigidly fixed to the bath wall coaxially to the bore hole, the other flanges fixed by springs above. the tubing and the fixing rings are connected via flexible busbars to the current supply system, while the adjacent flanges are connected to the different poles of the current supply system, and the diameter of the insulator bushings exceeds 1 mm of conductive bushings, 2, Device pop, 1, characterized in that the insulator bushings are made with a spherical outer surface.