Gear tooth surface shot peening finishing method

Abstract

The invention discloses a gear tooth surface shot peening finishing method in the technical field of gear tooth surface processing. The method concretely comprises the following steps of S1, heating agear tooth surface; S2, utilizing shots sprayed through a peening machine for strengthening the gear tooth surface, and enabling the tooth surface to form a residual compressive stress layer; S3, carrying out induction quenching processing on the residual compressive stress layer formed on the tooth surface, then carrying out secondary shot peening processing, and forming a high surface residualstress; and S4, after finishing shot peening, electroplating a surface of the residual compressive stress layer of the gear tooth surface, and then roasting and dehydrogenizing, so that the accuracy of a tooth shape is improved. According to the gear tooth surface shot peening finishing method provided by the invention, the gear bending fatigue resistance can be improved, the tooth surface fatigueresistance is improved, continuously machining tool marks can be eliminated at the same time, a lubricating condition of the tooth surface is improved, and meanwhile, after electroplating processing,grinding processing has no need to be carried out after shot peening, so that the accuracy of the tooth shape is improved, and a shot peening strengthening effect cannot be weakened at the same time.

Description

technical field [0001] The invention relates to the technical field of gear tooth surface treatment, in particular to a gear tooth surface shot peening strengthening finishing method. Background technique [0002] The fatigue and wear of gears are the main modes of failure of gear parts. In order to improve the strength of gears and prolong the life of gears, a layer of residual compressive stress layer is often formed on the surface of gears by shot peening process. The main function of shot peening is to impact the surface of the part with the help of high-speed moving projectiles, causing it to undergo plastic deformation, thereby producing favorable changes such as residual compressive stress layer and microstructure refinement, but at the same time, the roughness of the tooth surface is also increased due to the deformation of the gear surface. If the hardness is too high, the wear resistance, fatigue strength and contact stiffness of the gear tooth surface will be sign...

AI Technical Summary

Problems solved by technology

[0003] In order to reduce the roughness of the tooth surface of the gear and improve the precision of the tooth surface and tooth shape, the existing treatment process is to grind the gear after shot peening, but the wear will remove the residue formed by the shot peening on the tooth surface Compressive stress layer, in order to meet the requirements of tooth profile accuracy, the amount of wear can only be increased during the production process, sacrificing the effect of shot peening

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