High-frequency pulse current and shot blasting compounding metal surface strengthening device and method

Abstract

The invention discloses a high-frequency pulse current and shot blasting compounding metal surface strengthening device and method. The device comprises a rotating mechanism, a nozzle, a pulse power supply, a first electric brush, a second electric brush, a first chuck, a second chuck, a first supporting base and a second supporting base, wherein the center lines of the first chuck and the secondchuck are located on the same horizontal line, the centers of the first chuck and the second chuck are opposite, the first chuck and the second chuck are used for installing a workpiece, a chuck shaftof the first chuck is rotationally connected with the first supporting base and driven by the rotating mechanism to rotate, a chuck shaft of the second chuck is rotationally connected with the secondsupporting base, the two output ends of the pulse power supply are connected with the first electric brush and the second electric brush correspondingly, the first electric brush makes contact with the first chuck, the second electric brush makes contact with the second chuck, and the nozzle is aligned with the workpiece and used for conducting shot blasting on the surface of the workpiece. According to the device, the electroplastic effect, the skin effect and the heat effect of high-frequency pulse electricity are compounded with severe plastic deformation of shot blasting, so that a thicker plastic deformation layer is obtained after shot blasting, and the shot blasting effect is better.

Description

technical field [0001] The invention relates to a metal surface strengthening device and method combining high-frequency pulse current and shot peening, and belongs to the technical field of metal material surface treatment. Background technique [0002] With the advancement of aerospace, rail transit, shipbuilding industry, vehicles, construction machinery and marine engineering, many mechanical parts work under harsh conditions, requiring high wear resistance, good fatigue performance and corrosion resistance of mechanical parts Performance and other good comprehensive properties make the equipment run more safely and reliably. [0003] Shot peening is a surface modification and surface strengthening technology. The shot hits the surface of the material at a certain speed, causing severe plastic deformation on the surface of the material, changing the microstructure of the surface of the material, forming a residual compressive stress layer on the surface of the material, ...

AI Technical Summary

Problems solved by technology

This method plays an important role in improving the surface properties of materials and is widely used in various fields of industry. However, for some materials with high hardness or difficult to process, the surface is in a state of high hardness and low plasticity. It is also very difficult to produce sufficient plastic deformation, and it is difficult to form a deep plastic deformation layer, and it is also very difficult to improve its performance to a large extent; in addition, the surface hardening layer formed during the shot peening process will hinder the plasticity of the surface layer during the next shot peening. Deformation so that the effect of subsequent shot peening cannot reach deeper into the material

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