SU1424977A1 - Apparatus for depositing metallic coatings on the surface of articles - Google Patents

Abstract

The invention relates to devices for applying metallic coatings on the surface of products. The goal is to increase the performance of the application process. The preformed powder is placed in matrices 9 and 10, the matrices are inserted into cylindrical undercuts 8 into bevel gears 5 and 6, the coated products are inserted into the holes of the matrices, which are then pressed against discs 11 and 12. The heating source 20 is lowered along with bimetallic elements 15-17 until the heads 13 and 14 of the rivets fit into the hemispherical recesses in the disks — 1Gi 12. Include the heating source 20 and the rotation drive. Due to the fact that centrifugal forces act on the powder and on the products, due to -. Rotated drive gear 4 and satellite gears 5 and 6, as well as the fact that the ends of the coated products have additional pressure from the bimetallic elements 15 and 16, the coating formation process on the surface of the products is intensified. The use of the device allows an increase in the productivity of the technological process by about 5 times. 1 il. P Y & (L Is9 4 CO / V 16

Description

The invention relates to powder metallurgy, in particular, to devices for applying metallic coatings on the surface of articles.

The purpose of the invention is to increase the productivity of the coating process.

The drawing shows a diagram of a coating device.

The device consists of a housing 1, through which the axis 2 passes with a shoulder 3, a drive bevel gear 4 fixed on the axis 2 and kinematically connected with satellite bevel gears 5 and 6 (with the help of teeth 7), filled with internal recesses 8, non-metallic matrices 9 and 10 ,. installed in the recesses 8, cylindrical flat disks 11 and 12 with central hemispherical grooves (not marked) in contact with. the ends of the matrices 9 and 10 and the heads 13 and 14 of the rivets rigidly attached to the bimetallic elements 15-17. The latter are fixed on a cylindrical sleeve 18, in which an insulating spacer 19 is also placed with a source passing through it.

20 heating (for example, a high-frequency inductor), Bimetallic elements 15-17 are fixed on the sleeve with 18 screws

21 and 22.,.

The device works as follows.

The preformed coating (or powder) is placed into non-metallic arrays 9 and 10, inserted into cylindrical undercuts 8 formed into bevel gears 5 and 6, inserted into the holes the painted products, pressed with pegs 1i and 12, and lowered the source 20 heating together with the bimetallic elements 15-17 until the rivets 13 and 14 enter into the hemispherical grooves formed in the caps 11 and 12. Turn on the engine (not shown) and the heat source 20. As a result, the products are affected by centrifugal 1C 1e forces, which contribute to obtaining a dense coating on their surface, in particular, on the valve chamfer of the internal combustion engine (two). Due to the rotation of the products around the axes due to the kinematic connection of the drive gear 4 with satellite

0

five

0

five

gears 5 and 6 a quality metal coating is formed. This is facilitated by centrifugal forces developed during the rotation of the product, as well as additional pressure transmitted to the ends of the coated products through rivets 13 and 14 using bimetallic elements 15-17, which bend when heated from the HDTV inductor in the direction of increasing the diameter covered by them.

After the process of hardening (restoring) the chamfers of the valves is completed, two of them turn off the engine and the HDTV inductor. As a result, elements 15-17 are bent in the direction of decreasing the diameter covered by them - to an HDTV inductor (heat source 20), after which the inductor together with sleeve 18 is brought upwards from the cavity formed by conical satellite gears 5 and 6, and take out the reinforced valves from the central holes in these gears.

The material of the applied coating is an SMGN alloy, the adhesion strength of the resulting coating with the base material reaches 10-12 kg / mm, the porosity of the coating is not higher than 7%. The number of simultaneously reinforced parts up to 12 cm. when the diameter of the drive gear 220 mm. Drive rotation speed 600 rpm, satellite gear rotation speed 1500 rpm, 5. Process duration 1.5-2 min, the temperature of the powder layer

1050 ° C. I

Thus, the use of the proposed device makes it possible to increase the productivity of the coating process on the surface of products such as ICE valves by approximately five times as compared with the known method.

Claims (1)

Invention Formula A device for applying metal coatings on the surface of products, including a heat source, a rotation drive, a housing, non-metallic matrices and bimetallic elements, characterized in that, in order to improve the performance of the coating process, it is equipped with cylindrical flat disks made with central hemispherical grooves and installed at the ends not 0 five 0 five 3 1424977, metal matrices, and cylindrical-satellite gears are made with a sleeve bushing with an insulating spacer-axial cylindrical undercuts, which, moreover, the heating source is installed non-metal matrices along the axis of the bushing, and the bimetallic in the axial undercuts of the six elements are attached to its top-. ren, and a cylindrical flat disketna surface, while the register is installed with the possibility of con- trol made in the form of a drive contact with the surface of bimetallic and satellite bevel gears, elements.