RU2811319C1 - Combined bath for applying galvanic coatings by electrolytic rubbing - Google Patents

Abstract

FIELD: electroplating.

SUBSTANCE: used in the process of restoring worn parts. The combined bath contains a housing, a gear motor, pulleys, a V-belt, a holder bar, a frame, a mechanism for simultaneous rotation of four parts relative to their axis in contact with volumetric tampons mounted on anode plates, equipped with branch pipes connected to a liquid pump for forced circulation of the electrolyte.

EFFECT: increasing the productivity of forming high-quality galvanic coatings due to anode plates with fixed volumetric tampons, equipped with nozzles connected to a liquid pump for forced circulation of the electrolyte, which allow the use of high current density per unit area of the part and thereby increase the amount of deposited metal per unit time.

1 cl, 3 dwg

Description

The invention relates to the field of electroplating and can be used in the process of restoring worn parts.

From the publication (patent RU No. 2225464, IPC C25D19/00, published: 03/10/2004 bulletin No. 7) a device for an automatic galvanic installation for processing cylindrical rods is known, containing an axial feed unit for rods with a drive, a rotation unit, a current supply system and a galvanic bath with drains pockets and a mechanical activation unit, an intermediate table with rollers installed between the axial feed unit and the rod rotation unit, while the rotation unit and the current supply system are made in the form of two horizontal rows of rollers, electrically and kinematically connected to each other, installed with the possibility of rotation in one direction and located on both sides of the galvanic bath, in the end walls of which a number of holes are made for the passage of rods, while it contains a unloading unit located at the exit from the galvanic bath behind the rotation unit, equipped with rollers forming two horizontal rows, the rotation axes of which are located in the direction feeding the rods, while the rollers of the intermediate table also form two horizontal rows, the axes of rotation of which are located in the direction of feeding the rods.

The disadvantage of this device is that the dimensions of the processed parts have a limited range. Another disadvantage is the complexity of the design and many difficult-to-manufacture parts.

As a prototype, an installation was selected for applying galvanic coatings to the outer surfaces of parts, containing a housing, anodes installed in the housing through angles, a mechanism for moving movable, relatively symmetrically located anodes, longitudinal conductive suspensions, and the movement mechanism includes a gear motor on the shaft of which a double crank is installed, guides on which the mentioned suspensions are installed through support wheels, to which connecting rods are attached through hinged fastening units, and the second ends of the connecting rods are hingedly attached to the double crank, self-locking universal holders of parts are installed on the suspensions using a fastening nut, and to seal the body covers are installed (RU patent No. 2801976, IPC C25D17/02, C25D19/00 published: 08.21.2023 bulletin No. 24).

The disadvantage of this installation is the inability to intensify the process of galvanic deposition of metals and obtain high-quality coatings by using an increased cathodic current density, in which in baths where there is no contact between the part and the anode or tampon, metals are deposited unevenly with the formation of a large number of dendrites.

An invention is proposed that is aimed at eliminating the above-mentioned disadvantages, due to anode plates with fixed volumetric tampons, which are equipped with pipes connected to a liquid pump for forced circulation of electrolyte in the contact area of the tampons with parts rotating around their axis.

The technical problem is the creation of a combined bath for applying electroplating by electrolytic rubbing with anode plates with fixed volumetric tampons, equipped with nozzles connected to a liquid pump for forced circulation of the electrolyte in the contact area of the tampons with parts rotating around their axis, to increase the productivity of the galvanic process and improve quality of restored surfaces.

The technical result is: increasing the productivity of forming high-quality galvanic coatings due to anode plates with fixed volumetric tampons, equipped with nozzles connected to a liquid pump for forced circulation of the electrolyte, which allow the use of high current density per unit area of the part and thereby increase the amount of deposited metal per unit of time.

A combined bath for applying galvanic coatings by electrolytic rubbing containing a housing, a gear motor, pulleys, a V-belt, a holder bar, a frame, characterized in that it is technically equipped with a mechanism for simultaneously driving the rotation of four parts relative to its axis in contact with volumetric tampons mounted on anode plates, equipped with nozzles connected to a liquid pump for forced circulation of electrolyte.

The claimed device is illustrated in the figures:

fig. 1 - shows a general view; fig. 2 - section view A-A in FIG. 1. Fig.3 - sectional view BB in Fig. 1.

The claimed device consists of the following elements:

1 - frame, 2 - insulating plate, 3 - housing, 4 - support angle, 5 - insulator, 6 - V-belt, 7 - driven pulley, 8 - bolt securing the driven pulley to the holder, 9 - parts holder, 10 - support bearing, 11 - holder bar, 12 - drive pulley, 13 - gear motor, 14 - anode plate, 15 - volumetric tampon, 16 - tension spring, 17 - support rollers, 18 - pipes.

On the frame 1, a housing 3 is installed, anode plates 14 are installed in the housing 3, with fixed volumetric tampons 15 and support rollers 17. A holder strip 11 is installed on the support corners 4, into which the support bearing 10 is pressed into the lower ring, and the support bearing 10 is pressed into the upper ring of the bearing 10 parts holder 9. The driven pulley 7 is attached to the holder 9 using a bolt 8. The V-belt 6 is wound on the driven pulleys 7, and the V-belt 6 is also wound on the drive pulley 12. The drive pulley 12 is installed on the gear motor 13 attached to the housing 3.

A stable and high-performance electroplating process is achieved through the use of a mechanism for simultaneous rotation of parts around their axis with anode plates installed on both sides with fixed volumetric tampons at the points of contact of which contact is formed, which makes it possible to significantly increase the permissible cathode current density on the surface of the part.

The device works as follows. In the parts holder 9, prepared parts are installed that are subject to galvanic coating. Next, the anode plates 14 with fixed volumetric tampons 15 are pushed close from two opposite sides. Next, the anode plates are pulled together by springs 16, which creates a tight contact between the part and the volumetric tampon 15. An electrolyte (not shown) is poured into the body 3 of the combined bath, to the anode On plate 14, the positive terminal of the current lead from the transformer (not shown) is connected to the part holder bar with the negative terminal of the current lead from the transformer (not shown). Turn on the electric current, turn on the gear motor 13, as a result, through the drive pulley 12 and the V-belt 6, rotation from the gear motor is transmitted to the driven pulleys 7 with attached parts holders 9. Next, turn on the liquid pump (not shown) to force the supply of fresh electrolyte through the pipes 18 into the contact area between the part and the volumetric swab.

Consequently, the creation of a combined bath for applying electroplating by electrolytic rubbing with anode plates with fixed volumetric tampons and pipes for forced supply of fresh electrolyte into the electrolysis zone will allow the use of high current densities, thereby increasing the rate of galvanic deposition of metals, while simultaneously ensuring the best physical and chemical properties coatings.

List of used literature:

1. Ustyugov A.G. Automatic galvanic installation for processing cylindrical rods // Russian Patent No. 2225464. 11/10/2004. Bull. 7.

2. Gimaltdinov I.Kh., Valiev A.R., Adigamov N.R. Installation for applying galvanic coatings to the external surfaces of parts // Russian Patent No. 2801976. 2022. Bull. No. 24.

Claims (1)

A combined bath for applying electroplating by electrolytic rubbing, containing a housing, a gear motor, pulleys, a V-belt, a holder bar, a frame, characterized in that it is technically equipped with a mechanism for simultaneously driving the rotation of four parts relative to their axis in contact with volumetric tampons mounted on the anode plates equipped with nozzles connected to a liquid pump for forced circulation of the electrolyte.