Scanning-type micro-arc oxidation treatment device and method

Abstract

The invention discloses a scanning-type micro-arc oxidation treatment device and method. The treatment device comprises a fixing head, a liquid supply pipe and a liquid extracting pipe, wherein the fixing head comprises a fixing head body and an insulating layer arranged on the outer wall of the fixing head body; the fixing head body is made of a conductive material; an electrolyte passage is processed in the fixing head body; a clamping part is arranged outside the fixing head; the fixing head body is connected with a negative electrode of a power supply through a first guide wire; one end ofthe liquid supply pipe is fixed to an outlet end of the electrolyte passage of the fixing head; an inner passage of the liquid supply pipe coincides with the electrolyte passage; the other end of theliquid supply pipe is a free end; the liquid extracting pipe is fixed on the outer side of the liquid supply pipe in a sleeving manner; the internal diameter of the liquid extracting pipe is larger than the external diameter of the liquid supply pipe; and one end of the liquid extracting pipe is closed, and the other end of the liquid extracting pipe extends outwards relative to the free end of the liquid supply pipe by a set distance to form a liquid return area. The treatment device can realize the micro-arc oxidation treatment on a complicated area on the surface of a workpiece in a simplescanning manner, and is suitable for the micro-arc oxidation treatment on a local area of a large-size workpiece.

Description

technical field [0001] The invention belongs to the field of surface engineering technology and equipment, and relates to a micro-arc oxidation treatment method and device, in particular to a micro-arc oxidation treatment method capable of realizing complex trajectory scanning on the surface of a workpiece and a device for realizing the method. Background technique [0002] Micro-arc oxidation is a technique in which aluminum, magnesium, titanium and other non-ferrous metals or their alloys are placed in a special electrolyte, and ceramic oxides are directly grown in situ on the surface of the metal or alloy by plasma discharge. The essence is that when aluminum, magnesium, titanium and other non-ferrous metals or their alloys are placed in the electrolyte of the pulse discharge environment, the surface of the sample will undergo plasma discharge due to the action of extreme voltage, and the resulting high temperature and high pressure conditions will make aluminum, magnesium...

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Problems solved by technology

However, the above-mentioned published patents have the following disadvantages: (1) only fixed-point micro-arc oxidation treatment can be performed on the surface of the workpiece, and the complex area on the surface of the workpiece cannot be subjected to micro-arc oxidation treatment; Circulation and treatment, after a period of micro-arc discharge, the composition, concentration, temperature, pH value, etc. of the electrolyte will change, and the stability of the subsequent micro-arc discharge process will be affected

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