Gear partitioned and composite shot peening strengthening method and spiral bevel gear

Abstract

The invention provides a gear partitioned and composite shot peening strengthening method. The method comprises the following steps that meshing characteristics of a gear tooth surface are analyzed; according to the meshing contact stress analysis results, the gear tooth surface is divided into a shot peening area, a transition area and a non-shot peening area, wherein the shot peening area corresponds to a gear tooth surface meshing area, the transition area corresponds to an area, which is located at the periphery of the shot peening area and where the contact stress is not zero, of the geartooth surface, and the non-shot peening area corresponds to an area, which is located outside the transition area, of the gear tooth surface; and shot peening is carried out on the shot peening areaand the transition area to ensure that the residual compressive stress in the shot peening area is greater than the residual compressive stress in the transition area. The method can effectively improve the anti-fatigue and anti-wear performance of a spiral bevel gear, reduce the noise level of a gear pair, and realize the requirement target of consistency of the service life of an axle spiral bevel gear and a vehicle.

Description

technical field [0001] The invention belongs to the technical field of gear surface strengthening, and relates to a gear partition compound shot peening strengthening method and a spiral bevel gear. Background technique [0002] Shot peening technology is a metal surface cold processing technology, which is usually used by gear manufacturers as a means of increasing the fatigue resistance of gears. At present, the surface strengthening method of axle spiral bevel gear is mainly traditional shot peening, mainly centrifugal shot peening. The traditional shot peening is full tooth surface shot peening. On the one hand, there are problems of waste of manpower and material resources. On the other hand, due to the large spray surface, it is easy to cause uneven stress distribution, and the problem of overspray and underspray occurs. The force of each place is different. The traditional shot peening makes the actual force of the tooth surface not correspond to each place, that is,...

AI Technical Summary

Problems solved by technology

The traditional shot peening is full tooth surface shot peening. On the one hand, there are problems of waste of manpower and material resources. On the other hand, due to the large spray surface, it is easy to cause uneven stress distribution, and the problem of overspray and underspray occurs. The force of each place is different. The traditional shot peening makes the actual force of the tooth surface not correspond to each place, that is, the surface performance of the gear cannot be consistent, which will easily lead to the problem of crack initiation, which will further affect the fatigue resistance of the tooth surface. , The improvement of wear resistance has an impact

Secondly, the traditional shot peening method has limited improvement in the mechanical properties of gears such as residual compressive stress, hardness, bending fatigue strength and contact fatigue strength.

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