Bearing coating material and spraying process

Abstract

The invention discloses a bearing bush coating material and a spraying technique thereof. The coating material is composed of the following materials in percentage by weight: 3% of polytetrafluoroethylene, 8% of molybdenum disulfide, 10% of silicon carbide ceramic, 10% of graphite and the balance of organic solvent. The technique comprises the following steps: cleaning and polishing, primary drying, primary ultrasonic deoiling, secondary drying, secondary ultrasonic deoiling, tertiary drying, sandblasting, primary spraying, secondary spraying, thermosetting, inspection and subpackaging. By combining the coating material and spraying technique, the adhesiveness of the coating with the bearing bush alloy layer is obviously enhanced, the coating has higher uniformity and low shedding tendency, and the product has high qualification rate.

Description

technical field [0001] The invention belongs to the field of bearing bush processing, and in particular relates to a bearing bush coating material and a spraying process. Background technique [0002] The structure of the traditional bearing bush is that an alloy layer is attached to the steel back layer, and a soft anti-friction layer is added to the alloy layer by electroplating or sputtering. The main purpose of the antifriction layer is to increase the compliance, mosaicability and wear resistance of the inner surface of the bearing bush. However, as the engine power continues to rise, the bearing pads are faced with increasingly harsh working environments. The traditional bearing pads often suffer from peeling off of the alloy layer and coating, resulting in the burning of the engine pads. Moreover, the electroplating anti-friction layer method is a high-pollution processing method, while the sputtering method has high requirements on equipment and increases production...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a coating material spraying process for bearing pads, which can solve the problem that the coating of bearing pads is easy to fall off and the production cost of the coating is high on the basis of maintaining or having better compliance, mosaicability, and wear resistance. question