Ultrasonic impact strengthening device and method for rotary workpiece

Abstract

The invention relates to an ultrasonic impact strengthening device for a rotary workpiece. The ultrasonic impact strengthening device comprises an ultrasonic shot blasting device, a rotating device and a sealing box body, the ultrasonic shot peening device comprises an ultrasonic probe, a steel ball, a shot peening cavity and a shot peening chamber base, the lower end of the shot peening cavity is mounted on the shot peening chamber base, the upper end of the shot peening cavity is open and arranged below the rotary workpiece, the ultrasonic probe extends into the shot peening cavity, and the steel ball is flatly laid on the surface of the ultrasonic probe; the rotating device comprises a motor, a rotating shaft, a pinnacle shaft, a first bearing and a second bearing; one end of the rotating shaft is connected with the motor, the other end of the rotating shaft is connected with the pinnacle shaft, a rotary workpiece is installed on the rotating shaft, and the pinnacle shaft positions the rotating shaft and clamps the rotary workpiece. And the shot blasting chamber is positioned in the sealed box body. The rotating device driven by the speed-adjustable motor is coupled with the ultrasonic shot blasting device, so that the ultrasonic shot blasting technology is applied to the actual production and application of the rotary workpiece, and the service performance and the service life limit of the rotary workpiece at present are broken through.

Description

technical field [0001] The invention relates to the technical field of nano-strengthening of workpiece surfaces, in particular to a device and method for ultrasonically impacting surface nano-strengthening of rotary workpieces. Background technique [0002] Gears are important components in the mechanical transmission process. In the mechanical transmission system, bending fatigue and contact fatigue failures often occur during the operation of the gears, which greatly reduces the service life of the gears. At present, the demand for high-performance gears such as large load and long life is increasing, which puts forward higher requirements for the fatigue resistance of gears. Most of the gears nowadays are strengthened by carburizing or quenching treatment, which can achieve the purpose of improving the fatigue strength of the gears to a certain extent. However, the residual compressive stress level on the gear surface is still low, and it is difficult to significantly im...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an ultrasonic impact strengthening method for rotating workpieces in view of the problems of low load bearing capacity and poor fatigue resistance of gears in the prior art. The device and method refine the surface structure of the rotary workpiece through ultrasonic impact, improve the strength of the rotary workpiece, and significantly increase the bearing capacity of the rotary workpiece; and obtain high-strength residual compressive stress, and the residual compressive stress offsets the external load of the workpiece, thereby greatly Improve the fatigue resistance of the workpiece

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