SU1692666A1 - Apparatus for applying coatings - Google Patents

Description

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(21) 4470005/05 (22) 08/01/88 (46) 11/23/91. Bul №43

(71) All-Union Scientific and Production Association for the Restoration of Parts

(72) V.A.Ulnov and N.I. Kopytina (53) 678.056 (088.8)

(56) Ul'nov VA, Pimanov G, P. Recommendations on the use of domestic and foreign equipment for the gas-plasma deposition of powder materials in the restoration of machine parts. - M .: GOSNITI, 1986, p. 47

(54) COATING APPLIANCE

(57) The invention relates to a device for coating powder materials on the surfaces of various parts. The purpose of the invention is to increase productivity and application efficiency. For this purpose, in the coating device, the bunker is mounted rotatably around a horizontal axis of symmetry, perpendicular to the axis of the mouthpiece, and divided into sections by partitions passing through its axis of rotation, and provided with locks for the working position of the outlet orifice.

The invention relates to a device for coating powder materials on metallic and non-metallic surfaces of parts.

The purpose of the invention is to increase productivity and application efficiency.

Figure 1 presents a device based on a welding torch, a general view; figure 2 - section aa in figure 1; on fig.Z - the position of the axis of the hopper when entering the powder particles into the oxidizing flame; figure 4 - the same, with the introduction of the powder particles in a normal flame; figure 5 is the same, with the introduction of the powder particles in the carburizing flame; FIG. 6b shows a device based on a pistol grip torch, a general view.

The coating device comprises a burner 1 with a multi-nozzle mouthpiece 2, a powder hopper 3 equipped with

cl

with

the locking element 4 and fixed by means of the bracket 5 on the mouthpiece 2. The bracket 5 has a slot (not shown) for removing and installing the hopper 3 and the scale 6 for reading the angles O. of the position of the outlet of the bunker passing along the axis of the hopper. The powder bunker 3 is divided into sections 7 and 8 by a partition 9 with a guide sleeve 1, in the middle of the partition through which the locking element 4 passes with a small tension. Sections 7 and 8 of the bunker 3 are inserted with tension into the sleeve 11, and clamps 12, providing the necessary position of the outlet, depending on the structure of the acetylene-oxygen flame.

ABOUT

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The device works as follows.

Sections 7 and 8 of the powder bunker 3 are filled with different brands of powders, for example section 7 - powder of the base layer PG-19M-01 and PG-19N-01, and section 8 - powder sublayer PT-HA-01. Then the bunker 3 is rotated so that sections 8 with the powder underlayer are at the bottom and the axis of the bunker, and hence the operating position of the outlet orifice corresponds to the angle a - O (figure 4).

Then, the combustible mixture is ignited, a normal flame is set up for the appropriate PT-HA-01 grade of powder, and the locking element 4 is gradually pulled out, providing powder to the zone of the highest temperature through the lower outlet

In a single pass of the burner, a thin layer of powder coating with a thickness of 0.15-0.2 mm is applied onto the worn surface of the part, which plays the role of a sublayer for the subsequent application of basic layers. The reciprocating movement of the locking element 4 of the hopper 3 overlaps the powder feed outlet and rotates the bunker 3 so that section 7 with PG-19M-01 powder is at the bottom and the outlet hole takes the working position corresponding to the reference angle + a. scale 6 (figure 5). By adjusting the valves of the welding torch 1, the flame structure is changed to a carburizing optimum for powder PG-19M-01, and the locking element 4 is pulled out, bringing the particles into the zone of the highest temperature. The burner is applied in several passes.

coating of required thickness equal to the nominal size plus machining allowance.

When coating the base layer instead of PG-19M-01 powder, powder

PG-19N-01 use an oxidizing flame and the working position of the outlet orifice at an angle — and the 6th scale, fixed by knobs 12. With a different flame structure, the adhesion of the resulting coating

with the surface of the part is reduced by 20-25%, which can lead to flaking.

Claims (1)

Claiming Device containing a burner with a multi-nozzle mouthpiece and a bunker equipped with a locking element and fixed by means of a bracket on the burner barrel, characterized in that, in order to increase labor productivity and deposition efficiency, the hopper is mounted rotatably around a horizontal axis of symmetry, perpendicular to the axis of the mouthpiece, and divided into sections by partitions passing through the axis of its rotation, and provided with locks for the working position of the outlet orifice.  , // oo TG GSh FIG. five