SU650763A1 - Device for electrochemical treatment - Google Patents

Description

through the slot and the transmitted current at variable parameters of the cathode. When the cathode device is axially moved in the inner cavity of the workpiece during displaced working part (slit head) and spring-loaded stops and roller from Insulators in the working position, rotation of the part is possible, which is possible only when it is fixed from axial movement,. Moving the cathode device in the working position provides for the translational, and after the tube leaves the workpiece channel (i.e., in the idle position) it moves along the guide rollers, since it has a hinged connection and can fall. The disadvantages of the known device include: it is intended only for treating the inner surface of the products; It has a low processing capacity; when loading and removing, electrochemical processing is not performed; for each pipe, individual mechanisms for moving the electrode are required, which complicates the design. The purpose of the present invention is to eliminate these drawbacks, to increase the processing performance, the compactness of the main units of the device, to simplify the transition to The work of products of another type of product and the ability to handle the internal and external surfaces of pipes simultaneously. This goal is comprehended by the fact that in the electrochemical processing of cylindrical products made on the basis of rotary rotors, which ensure separation of working positions from the loading and unloading positions and spreading over the working bath in space, each rotor is equipped with two systems of support rollers, rollers and electrodes, diametrically opposed to the rotor disks, and the supporting rollers and cat are rotated relative to each other by 90 °, cover the workable product with education m closed kbntur and associated with driving mechanisms of rotation. Yesuadi shaft with discs and mechanisms for moving the product is made replaceable and hollow, and current-carrying tires are located in the cavity of the shaft. To ensure the possibility of treating the inner surface of the pipe on the disks of the rotary stator, on each of the positions are placed coaxially and centruuid funnels that are hydraulically connected to the electrolyte delivery system. In the drawing, the design of the proposed device is considered on the example of a specific implementation of the pattern of an electrolytic galvanizing unit of pipes with a diameter of 1 / 2-4, 6-8 m long. The device for electrochemical processing consists of a stationary bath 1, above which the supporting shaft 2 of tubular section is installed. The rotors 3 are installed along the shaft along the length. On each rotor, depending on the number of simultaneously processed pipes, support L are installed, or drive 5 rollers and drive rollers 6 moving tube 7. Rotors 3 have two working positions when the shaft 2 turns 180 ° . The inner electrodes 8 are metal rods or pipes with insulators. They are attached to one (or two sides) of the face rotors. The outer electrodes 9 are attached to the rotors 3. They do not necessarily have to cover the pipes along their entire length. The rotation of the drive rollers b is performed using a mechanism with slaves 10, 11 and 12 parasitic gears. The adjacent rollers 6 are shifted about the center of the other along the length of the tube. The electrolyte (solution) is supplied by pipelines 13 through manifolds 14 and nozzles 15. A drive mechanism for rotating the carrier shaft 2 by 180 consists of a hydraulic cylinder 16, a rail 17 and a gear 18. The current is supplied to the inside. The rotated electrodes 8 are made by contact 19 and tires 20, the current is supplied to the outer electrodes 9 by means of tires 21 located in the hollow carrier shaft 2, from contactors 22 and 23. The pipes 7, after appropriate preparation, are set (upper position) through centering hoppers 24. The drive rollers 5 pick up the trunks 7 and send them all the way to the nozzles 15. The drive mechanism of the rollers 5 in the upper (auxiliary) position is driven by the pinion gear 25 and the gear 26 interlocking with it. driving on rollers 5 carried out with the help of screws 27 mounted on shafts 28. When pipes are pushed into the nozzles, the Task mechanism is turned off, the drive mechanism is turned on and the hydraulic cylinder 16, which rotates gear 18 with the rack 17, turns carrier shaft 2 by 180, converts pipe 7 into bath 1, immersing them in electrolysis (lower position - working). When the carrier shaft is rotated by 180, the gear 10 engages with the gear 12, and through the parasitic gears 11 from the drive of the rotation of the tubes, the rollers 6 begin to rotate

pipes. At the same time, a current is supplied to the inner 8 and outer 9 electrodes and electrolyte flows through the nozzles 15 in the internal channels of the pipe.

While the process of electrochemical treatment of pipes in the lower (working) position is underway, in the upper (auxiliary) position, finished processed pipes are dispensed and the task of a new batch of pipes for electrochemical processing is issued.

At the end of the electrochemical process, the flow of current and electrolyte is stopped, and the carrier shaft 2 is rotated 180 ° (in the circumferential direction). In this case, the movable contacts 19 at the free ends of the inner electrodes 8 are opened, and the driven gear 26 engages with the gear 25 of the drive mechanism of the rollers 5. As the rollers rotate, the pipes are discharged from the device. In this way, the auxiliary and working operations are combined in time and high productivity is achieved with small dimensions.

For the transition to; - processing of products of another assortment, the carrier shaft with disks and transport mechanisms is made replaceable. The device provides the ease of such a replacement, which allows it to perform various electrochemical treatments on it: electroplating, electropolishing, oxidation, phosphating, electrolytic degreasing, etc.

The presence of a rotary rotor on the discs at each of the positions of coaxially mounted nozzles 15 and centering funnels 24, which are hydraulically connected to the electrolyte supply system, allows, with small dimensions of the bath, to produce intensive circulation of solutions through the internal cavity of pipes (products) / dm), which makes it possible to handle internal

surfaces of pipes (products of other grades).

Claims (4)

1. A device for the electrochemical machining of cylindrical products such as pipes, made on the basis of rotary rotors, providing separation Ie in the working space positions from the loading and unloading positions and located above the working bath are characterized in that, in order to increase processing performance by combining the auxiliary and working times, the said rotor is equipped with two systems of support rollers, rollers and electrodes diametrically opposed to the rotors, and the support rollers and rollers deployed 90 ° relative to each other, cover the products with o6pa3OBaHneN. closed loops and associated with rotational drive mechanisms. 2. The device according to claim 1, which is tl that is, in order to compact the rotors, the shaft is made hollow and there are current-carrying tires in it. 3. The device according to claim 1, characterized in that, in order to simplify the transition to the processing of products of a different range, the carrier shaft with the disc and mechanisms of movement products are replaceable. 4. The device according to claim 1, characterized in that, in order to enable the treatment of the internal surface of the pipes, On the rotary rotor disks at each of the positions there are coaxially nozzles and centering funnels, which are hydraulically connected with the electrolyte supply system. Sources of information taken into account in the examination 1. USSR author's certificate No. 227035, cl. B 23 P 1/04, 1967.