System and method for reducing abrasive particle flow extrusion and oscillating residual stress

Abstract

The invention provides a system and method for reducing abrasive particle flow extrusion and oscillating residual stress. First, in a sealed cavity, the viscous abrasive flow is squeezed to make the viscous abrasive flow rigid under high-pressure extrusion, and then ultrasonic waves are used to The method uses the rigid viscous abrasive flow under high pressure as the working medium, and oscillates the rigid abrasive flow at high frequency, so that the abrasive particles in it continuously hit the surface of the bearing ring, and at the same time, the viscous abrasive flow is in a small amount under high pressure extrusion. The surface of the bearing ring is flexibly cut to ensure that the high-frequency oscillating abrasive particles hit the processed metamorphic layer more deeply, thereby effectively eliminating the stress concentration on the surface of the bearing ring, changing the stress state of the surface layer, eliminating the tensile stress of the surface layer, and hardening the metamorphic layer to obtain Bearing ring surfaces with anti-fatigue properties.

Description

technical field [0001] The invention relates to a residual stress reduction system and method for a raceway of a bearing ring, in particular to a method for reducing the surface stress concentration of the raceway of a bearing ring and improving the stress distribution law of the bearing surface. Background technique [0002] As the core component of the equipment manufacturing industry, the traditional machining process of bearings is mainly based on "forming" manufacturing. The precision index of position tolerance does not consider the indicators of physical properties such as residual stress and surface hardening generated by the bearing during the processing process. When the bearing ring is actually processed, after heat treatment and quenching, during the grinding process, first, in the grinding process The material removal force under the rigid grinding action of the grinding wheel; second, when the grinding wheel is grinding, the local high temperature generated by ...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the residual stress generated on the bearing surface cannot be solved due to the rapid and rigid extrusion of the grinding wheel on the surface of the workpiece under the influence of high temperature of the grinding and the cooling of the lubricating fluid during the grinding process of the bearing ring. Eliminate the problem of stress concentration on the surface, and invent a residual stress reduction method on the raceway surface of the bearing ring to change the stress distribution state on the surface of the bearing ring, and realize the " habitual control

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