Method and device for carrying out localized electro-deposition repair on inner wall of material through laser composite electrochemical technology

Abstract

The invention discloses a method and device for carrying out localized electro-deposition repair on the inner wall of a material through a laser composite electrochemical technology, and relates to the field of non-traditional machining. According to the method, a workpiece is repaired under the laser and electrochemical reaction composite action, a tool anode is arranged in the center in the workpiece, a certain gap is kept between the tool anode and the workpiece, laser beams are focused on the outer surface of the workpiece, and localized repair of the inner wall is achieved. The method and device aim at the problem that coatings on the inner walls of tubular and shaft-shaped parts with large aperture ratios fall off, lose efficacy and are difficult to repair, the characteristic of high heat conductivity of workpieces is utilized, the laser heat effect and electrochemical deposition are cooperated, localized coating repair of the inner walls of workpieces is realized, the electrodeposition reaction does not occur in other areas which do not need to be repaired, the operation process is simple, the plating solution cost is greatly saved, and the problem that normal use cannot be achieved due to the consequences that the bore pressure is low, the precision is reduced, and the size of an inner bore is increased due to the fact that the coating on the inner surface of the deep tube inner bore falls off is solved.

Description

technical field [0001] The invention relates to the field of surface processing in special processing technology, in particular to a method and device for laser electrochemical composite processing, which is suitable for rapid and localized electrodeposition repair of difficult-to-machine inner surface workpieces such as pipes and hollow shafts. Background technique [0002] In recent years, surface coating technology has played an important role in the fields of national defense, machinery, aerospace and chemical industry. Electroplating is widely used in tubular, shaft and On the inner wall of parts such as shapes. The mechanical friction, plugging and corrosion of parts under extreme conditions will cause loss. The coating on the inner wall is prone to partial shedding and failure when subjected to high temperature, high pressure, and load extrusion, which greatly reduces the accuracy and service life of the parts. At present, the local coating repair solution for parts ...

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Problems solved by technology

The patent with the publication number CN102817251A proposes a laser pulse electroplating system, which uses laser pulses and electrical signal pulses to match, realizes the combination of laser irradiation and electrodeposition technology, effectively improves the physical and chemical properties of the coating, and improves the processing of the coating. efficiency and resolution, but this invention is mainly aimed at improving the quality of the electrodeposited layer, and cannot achieve the effect of laser localization induced electrodeposition; the patent with the notification number CN109735883B proposes a laser-assisted flexible follower tool electrode microelectrode A deposition device and method, the method uses a flexible follow-up tool electrode to limit the electric field dispersion area and the electrodeposition reaction area, improves the localization of electrodeposition and the dimensional accuracy of the component, and controls the movement of the flexible follow-up tool electrode micro-parts with complex shapes can be deposited using only one path, but in this invention, the process is relatively complicated, and it is difficult to keep the moving path of the moving tool electrode consistent with the laser scanning path, and it is difficult to guarantee the localization of the coating

[0004] The traditional laser composite electrochemical deposition method can only achieve laser-enhanced electrodeposition on the surface of the workpiece and improve the performance of the existing electroplating layer. It is impossible to obtain the inner wall and back coating of the workpiece with laser alone.

Although the use of micro-tool anodes can achieve local electrodeposition of coatings and microstructures, the process is complex, and it is difficult to achieve accurate "knife alignment" between the anode and the laser focus, and the accuracy of the device is very high.

In terms of application, the current research can only achieve electrodeposition on the surface of the workpiece irradiated by laser. It is difficult to achieve a flexible and highly localized coating and structure on the back and inner wall of the workpiece induced by a single laser, which limits the application of this technology on the inner wall of the workpiece. application development

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