Method and device for achieving localized electro-deposition by conducting anode local activation through laser

Abstract

The invention discloses a method and a device for realizing localized electro-deposition by performing anode local activation by using laser, relates to the technical field of non-traditional machining, and aims to remove an oxidation film in a specific region on a workpiece by using laser irradiation and electrochemical reaction and adjust the current flow direction of an electrochemical loop to perform localized electrochemical deposition on the region, without the oxidation film, on the workpiece. Local activation is achieved in a laser irradiation induced electrolysis mode, substrate damage caused by directly adopting laser to etch an oxide layer or a passivation layer is avoided, the laser scanning path and range can be controlled through a numerical control system to achieve selection of a local activation area on the surface of a workpiece, extremely high flexibility and precision are achieved, and the application range is wide. And activation and deposition are both carried out in situ under liquid, so that the workpiece is prevented from being oxidized or passivated again between the two working procedures, and the efficiency, precision and surface performance of a local coating are improved.

Description

technical field [0001] The invention relates to the technical field of compound special processing, in particular to a method and a device for localized electrodeposition by laser-activated anode. Background technique [0002] With the continuous expansion of the field of micromachining, the requirements for the surface properties of materials are gradually increasing. In the production of electronic components, in order to cope with the harsh use environment of electronic products, functional coatings are generally used on the surface of devices to meet the requirements of corrosion resistance, wear resistance, and magnetic properties. However, due to the high cost of precious metals, electroplating processes that save precious metal consumption are being studied at home and abroad. Partial electroplating can realize partial electroplating on the parts of the workpiece that only need functional coatings to meet the requirements of materials, while improving production effi...

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Problems solved by technology

However, the bandaging method is difficult to bandage and clean the gaps of parts with complex shapes; the profiling fixture is made with high precision, and different plating parts require different fixtures, which is cumbersome and costly; the insulating coating method is not suitable for high-temperature electroplating

In the article "Research on Pretreatment Technology of Aluminum Alloy Electroplating", it is proposed to remove the oxide film on the surface by pretreatment methods such as pickling and alkaline activation before aluminum alloy electroplating, but there will be residual liquid in the cracks of the substrate during acid and alkali treatment. Corrosion of the base aluminum, and electroplating after pretreatment is difficult to ensure that the oxide film or passivation film will no longer be formed

In the article "Laser Plating and Laser Etching", due to the short pulse, strong directionality and high energy of the laser, it is proposed to use laser to electroplate the surface of the workpiece. Although the laser can remove the oxide film or other passivation film on the surface of the material, but There is a problem of laser damage to the substrate during laser plating

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