The method of coating the surface friction

 

(57) Abstract:

The invention relates to mechanical engineering, in particular to the technology of applying a solid lubricant coatings with ultrasound. The method of coating the surface friction is that the coating is applied by rubbing in pseudocyesis layer of powder of a solid lubricant, and the lubricant particles reported oscillations of ultrasonic frequency, oriented relative to RUB the surface in radial and tangential directions. 2 Il.

The invention relates to mechanical engineering, in particular to the technology of applying a solid lubricant coatings of the type of graphite or molybdenum disulfide on the friction surface of the cylindrical parts like shaft, and can be used in all cases when you want to apply the coating in the form of dry powder on the surface subjected to wear.

Known method of applying a solid lubricant on the metal surface friction by rubbing them with a powder of molybdenum disulfide, molybdenum diselenide, graphite, etc. and RUB the surface may be covered with a sublayer of fusible metal.

Known method of applying a solid lubricant on the metal in the cation excess lubricant mixture.

Closest to the claimed is a method of obtaining anti-friction coatings by rubbing the metal surface with molybdenum disulfide carried out in an atmosphere of ammonia.

However, the known methods do not provide high durability of the coating due to the poor adhesion to the treated surfaces, or require special expensive equipment vacuum chambers.

The task of the invention is to improve durability of the coating for improving the adhesion with the surface.

This object is achieved in that the rubbing surface is carried out in pseudocyesis layer of powder of a solid lubricant, and the lubricant particles reported oscillations of ultrasonic frequency, oriented towards RUB the surface in radial and tangential directions.

In Fig. 1 and 2 shows the scheme of the device for implementing the inventive method.

The workpiece 1 (cylindrical shaft surface) contacts in the implementation of the method with tool elastic metal strip 2, which surface in the zone of contact with the workpiece rigidly connected with the frame 3 of innocore 4, which in turn is connected with the ultrasonic transducer 5, supplied from the ultrasonic generator (ultrasonic generator-10, not shown in the figure). Solid lubricant in powder form is fed to the fence and zahvatyvali rotating the part 1, is moved into the working area.

As the elastic tape 2 is rigidly connected to the ultrasonic concentrate 4, when it is stretched and compressed by the value of the amplitude of the end face of the hub (30 to 50 μm) with ultrasonic frequency. In the particles of the lubricant 6 in contact with the tape 2, receive pulses of oscillations of two types of S1and S2oriented with respect to the treated surface radially S1and tangentially S2. The appearance of the pulses S2caused by the lengthening and shortening of the belt, and pulses S1the fact that the lengthening and shortening of the tape with the lesser and greater force compresses the pad 3, thereby the tape 2 is approaching, moving away from the treated surface 1. The pulses follow with ultrasonic frequency, activating particles of grease. Creates pseudocyesis layer in which particles of grease under the influence of impulses S1effectively penetrate into all the microscopic irregularities of the surface details. This is the result in contact with the material of the lining 3. Particles of grease, captured by the movement of rotation of the parts involved in the V-gap and distributed across the treated surface. When this happens the effective desapareceu of asperities of the surface of the part, which was not provided with the first processing stage, as the pulses S2significantly accelerate the process of rubbing, while the pulses S1prevent the phenomenon of arching grease over the asperities. Plate 3 together with the tape 2 perform an oscillating movement of the ultrasonic frequency, which makes the rubbing process is particularly effective, providing high-quality adhesion and, as a consequence, increasing the durability of the coating.

The method of coating the surface of the cylindrical parts by rubbing the surface, characterized in that the rubbing is carried out in pseudocyesis layer of powder of a solid lubricant, and the lubricant particles reported oscillations of ultrasonic frequency, oriented relative to RUB the surface in radial and tangential directions.

 

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5 cl, 2 dwg, 3 tbl, 2 ex

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1 ex

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