Ultrasonic deep-rolling and tumbling integrated surface strengthening device

Abstract

The present invention discloses an ultrasonic deep-rolling and tumbling integrated surface-strengthening equipment. The utilization of said equipment can implement surface-strengthening treatment by using ultrasonic deep-rolling process and tumbling process. It is mainly characterized by that it utilizes ultrasonic vibration and independent rolling ball to reduce friction force and static pressurebetween tool head and workpiece surface so as to prevent surface scoring and structure deformation.

Description

1. Technical field [0001] The invention belongs to the technical field of metal surface strengthening, relates to ultrasonic impact, rolling and rolling technology, and is especially suitable for improving the fatigue resistance, surface quality and wear resistance of parts, and is suitable for aerospace, vehicles, ships, weapons Manufacturing and maintenance of equipment, etc. 2. Background technology [0002] The surface residual stress has a significant impact on the fatigue resistance and stress corrosion resistance of parts. Residual tensile stress often greatly reduces the fatigue resistance of parts, increases the sensitivity of parts to corrosion fatigue, and induces the initiation of stress corrosion cracks. Reducing the residual tensile stress on the material surface or introducing residual compressive stress can significantly improve the fatigue life of parts, reduce the sensitivity of parts to corrosion fatigue, and inhibit the initiation of stress corrosion cra...

AI Technical Summary

Problems solved by technology

[0010] Ultrasonic vibration rolling is a surface processing method that produces plastic deformation and flattening of the asperities on the surface of the workpiece through the dynamic impact of the ultrasonic vibration of the tool head on the surface of the workpiece, thereby playing a role in surface finishing. This process will also make the workpiece There is a certain residual compressive stress on the surface. The main disadvantage is that the tool head and the horn are fixed together, which will cause the tool head to produce sliding friction on the surface of the workpiece, which will easily cause scratches on the surface of the workpiece, and at the same time make the subsurface of the workpiece unfavorable. Shear stress for fatigue resistance. To this end, it is necessary to reduce the pressure applied to the tool head, so the residual compressive stress that can be produced by this method is small.

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