阅读说明：本技术 一种电极保护浸没式微弧氧化夹具 (Electrode protection immersion type micro-arc oxidation clamp ) 是由 牛夷 姜晶 刘浩宇 杨力豪 张泽展 喻培丰 王超 于 2021-07-15 设计创作，主要内容包括：本发明公开了一种电极保护浸没式微弧氧化夹具,由导电电极1、耐酸碱密封橡胶圈2、弹性结构PVC板3、PVC管4、导电导线5、夹子弹簧6、PVC夹板7组成,所述PVC管内部含突出勾槽并与弹性结构PVC板相互勾连；所述导电电极固定于弹性结构PVC板同时与导线相连；所述导线从中空的PVC管中引出接入微弧氧化阳极电极；所述的PVC夹板两边边缘存在缺口,目的是能够使夹具固定于微弧氧化槽中；所述夹子弹簧用于该夹具的张开与闭合。本发明结构简单,同时制造成本低,具有可拆卸、多夹具协同、可定制化等优点,适用于目前各种不同种类酸碱性的电解液以及大部分平面工件的微弧氧化加工,具有极大的应用与市场前景。(The invention discloses an electrode protection immersed micro-arc oxidation clamp which comprises a conductive electrode 1, an acid and alkali resistant sealing rubber ring 2, an elastic structure PVC plate 3, a PVC pipe 4, a conductive wire 5, a clamp spring 6 and a PVC clamping plate 7, wherein the interior of the PVC pipe is provided with a protruding hook groove and is mutually hooked with the elastic structure PVC plate; the conductive electrode is fixed on the PVC plate with the elastic structure and is connected with the lead; the lead is led out from the hollow PVC pipe and connected to the micro-arc oxidation anode electrode; notches are arranged at the edges of two sides of the PVC clamping plate, so that the clamp can be fixed in the micro-arc oxidation tank; the clip spring is used for opening and closing the clip. The invention has simple structure and low manufacturing cost, has the advantages of detachability, multi-clamp cooperation, customizability and the like, is suitable for the micro-arc oxidation processing of various acid-base electrolytes and most of plane workpieces at present, and has great application and market prospects.)

1. An electrode-protected submerged micro-arc oxidation fixture, comprising: the PVC clamping plate is hinged with the PVC pipe to form a clamping mechanism, and the clamp spring is positioned at the hinged part of the PVC clamping plate and the PVC pipe to provide clamping force for the clamping mechanism; the PVC pipe is characterized in that the PVC pipe is of an arc structure with a hollow interior, the clamping tail end of the PVC pipe is provided with a clamping part perpendicular to the trend of the PVC pipe, the clamping part is hollow and is provided with an opening at one side, the upper end and the lower end in the hollow cavity are respectively provided with a long-strip-shaped hook-shaped bulge along the trend of the cavity of the clamping part, and the hook-shaped bulges are symmetrically arranged up and down and face the opening; the elastic structure PVC plate is in a long strip shape, the upper end and the lower end of the elastic structure PVC plate are in hook shapes, the elastic structure PVC plate is used for realizing the hook connection of the elastic structure PVC plate and a long strip hook-shaped bulge in the clamping part, the middle part of the elastic structure PVC plate is bulged, and the bulge is fixedly connected with the electrode; the lead is positioned in the PVC pipe, and one end of the lead passes through the PVC plate with the elastic structure and is connected with the electrode; the other end extends out of the PVC pipe head end; the acid and alkali resistant sealing rubber ring is arranged at the opening of the clamping part, the electrode in an initial state is positioned outside the acid and alkali resistant sealing rubber ring, the PVC plate with the elastic structure is compressed when a workpiece is clamped, the electrode retracts into the acid and alkali resistant sealing rubber ring, and the acid and alkali resistant sealing rubber ring is in close contact with the workpiece to realize sealing.

2. The electrode protection immersion type micro-arc oxidation fixture as claimed in claim 1, wherein the acid and alkali resistant sealing rubber ring has three symmetrical wave-shaped cross-sectional shapes, the wave-shaped bulge in the middle is highest, the top is flush, and a slit for passing a lead is arranged; the tail edges of the wavy structures on the two sides are parallel, the tail ends are provided with inward bulges, and the bulges are matched with the long strip-shaped hook-shaped bulges in the clamping part to realize hooking.

3. The electrode-protected submerged micro-arc oxidation fixture as claimed in claim 1, wherein the PVC clamping plate is an elongated clamping plate matched with the electrolyte tank, and notches are arranged at the lower parts of two ends of the elongated clamping plate for clamping two edges of the electrolyte tank.

Technical Field

The invention relates to an electrode protection immersion type micro-arc oxidation clamp which is suitable for micro-arc oxidation related research and production of titanium, magnesium, aluminum and related alloy workpieces capable of being subjected to micro-arc oxidation.

Background

The micro-arc oxidation (MAO) technology is a new surface treatment technology developed from the traditional anodic oxidation technology, breaks through the limitation of the prior use condition, and has the advantages of no pollution, simple and efficient preparation process and the like. Non-ferrous metals such as aluminum, magnesium, titanium, zirconium and the like and alloys thereof are placed in special electrolyte, and higher voltage or current is introduced, so that a layer of hard ceramic or an oxide layer with other functions grows on the surface of the base metal in situ, and meanwhile, the film layer has high bonding strength with the base, is not easy to crack and fall off, and has excellent corrosion resistance, wear resistance and insulativity.

In the process of micro-arc oxidation, a workpiece is clamped by a traditional clamp, and the problem that the clamp cannot be in contact with electrolyte exists, once the workpiece is in contact with the electrolyte, an electrode on the clamp can be in contact with the electrolyte after electrification, the whole experiment is adversely affected by oxidation action on the electrode, the clamp and the electrode need to be treated and cleaned later, and the service life of the clamp and the electrode is greatly shortened. However, the lack of contact between the chuck and the electrolyte can cause a solution-air interface to exist in the clamped workpiece, which can have undesirable effects on micro-arc oxidation. Therefore, the invention discloses a clamp which can be immersed in electrolyte in the process of micro-arc oxidation, which greatly simplifies the experimental process of micro-arc oxidation, reduces the experimental cost and improves the production efficiency.

Based on the electrode protection immersed micro-arc oxidation fixture, the electrode protection immersed micro-arc oxidation fixture can be placed into electrolyte for experiment, and the more excellent micro-arc oxidation effect and the more efficient experiment operation are realized.

Disclosure of Invention

The invention aims to provide an electrode protection immersion type micro-arc oxidation clamp; the clamp is simple and convenient to operate, easy to produce, low in cost, high in universality and wide in market application prospect.

In order to achieve the above object, the present invention provides the following technical solutions.

An electrode-protected submerged micro-arc oxidation fixture, comprising: the PVC clamping plate is hinged with the PVC pipe to form a clamping mechanism, and the clamp spring is positioned at the hinged part of the PVC clamping plate and the PVC pipe to provide clamping force for the clamping mechanism; the PVC pipe is characterized in that the PVC pipe is of an arc structure with a hollow interior, the clamping tail end of the PVC pipe is provided with a clamping part perpendicular to the trend of the PVC pipe, the clamping part is hollow and is provided with an opening at one side, the upper end and the lower end in the hollow cavity are respectively provided with a long-strip-shaped hook-shaped bulge along the trend of the cavity of the clamping part, and the hook-shaped bulges are symmetrically arranged up and down and face the opening; the elastic structure PVC plate is in a long strip shape, the upper end and the lower end of the elastic structure PVC plate are in hook shapes, the elastic structure PVC plate is used for realizing the hook connection of the elastic structure PVC plate and a long strip hook-shaped bulge in the clamping part, the middle part of the elastic structure PVC plate is bulged, and the bulge is fixedly connected with the electrode; the lead is positioned in the PVC pipe, and one end of the lead passes through the PVC plate with the elastic structure and is connected with the electrode; the other end extends out of the PVC pipe head end; the acid and alkali resistant sealing rubber ring is arranged at the opening of the clamping part, the electrode in an initial state is positioned outside the acid and alkali resistant sealing rubber ring, the PVC plate with the elastic structure is compressed when a workpiece is clamped, the electrode retracts into the acid and alkali resistant sealing rubber ring, and the acid and alkali resistant sealing rubber ring is in close contact with the workpiece to realize sealing.

Furthermore, the axial cross section of the acid and alkali resistant sealing rubber ring is in a symmetrical three-wave structure, the middle wavy bulge is highest, the top of the middle wavy bulge is flush, and a slit for passing through a lead is formed; the tail edges of the wavy structures on the two sides are parallel, the tail ends are provided with inward bulges, and the bulges are matched with the long strip-shaped hook-shaped bulges in the clamping part to realize hooking.

Furthermore, the PVC clamping plate is a strip-shaped clamping plate matched with the electrolyte tank, and the lower parts of the two ends of the strip-shaped overtime are provided with notches for clamping two edges of the electrolyte tank.

Compared with the prior art, the realized invention has the following excellent effects:

1. the fixture can ensure that the whole workpiece to be processed is immersed in the electrolyte, so that not only can two sides be processed to carry out film growth, but also the undesirable edge micro-arc oxidation effect caused by the fact that the surface of the workpiece is left at the air-electrolyte junction because of the traditional fixture is avoided;

2. the clamp has strong adaptability and can be suitable for most of plane workpieces and any electrolyte with different acidity and alkalinity;

3. the electrode of the clamp is wrapped in the PVC pipe cavity and does not contact with the electrolyte, so that the service life of the electrode is greatly prolonged, the complex cleaning after working is not needed, and the electrode can be detached and replaced along with the PVC plate with the elastic structure;

4. the clamp clamps and fixes the workpiece through the spring, so that the workpiece can be quickly replaced, and the experiment efficiency is improved;

5. the fixture can be integrated on a plurality of uniform PVC clamping plates, so that the aim of synchronously processing a plurality of workpieces can be fulfilled at the same time;

drawings

Fig. 1 is a schematic side perspective internal structural view of an electrode-protected submerged micro-arc oxidation clamp and an internal structural view of a workpiece contact clamping cavity.

In fig. 1: 1-an electrode; 2-acid and alkali resistant sealing rubber ring; 3-PVC board with elastic structure; 4-PVC pipe; 5-conductive wire; 6-clip spring; 7-PVC plywood.

Fig. 2 is a schematic view of the internal structure of a clamping cavity of the electrode-protected immersion type micro-arc oxidation clamp in contact with a workpiece.

FIG. 3 is a PVC plate structure with an elastic structure in an electrode protection immersion type micro-arc oxidation clamp.

FIG. 4 is a schematic general appearance of an electrode-protected submerged micro-arc oxidation fixture in combination with an electrolytic cell of the present invention, wherein 9 — the electrolytic cell; 10, a workpiece to be processed; 11-micro arc oxidation power supply.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

See fig. 1, 2.

An electrode protection immersed micro-arc oxidation clamp comprises a conductive electrode 1, an acid and alkali resistant sealing rubber ring 2, an elastic structure PVC plate 3, a PVC pipe 4, a conductive wire 5, a clamp spring 6 and a PVC clamping plate 7, and is characterized in that two ends of the PVC pipe are respectively connected with the spring 6 and the acid and alkali resistant sealing rubber ring 2; a protruding hook groove is formed in the cavity at the lower part of the PVC pipe and used for being hooked with the elastic structure PVC plate 3, and 8 is the structure at the hook connection part; the conductive electrode is fixed with the PVC plate 3 with the elastic structure, and a conductive lead 5 is led out from the electrode. The interior of the PVC pipe is mutually hooked with the elastic structure PVC plate through the protruding hook groove; the conductive electrode is fixed on the elastic structure PVC plate and is connected with the conductive lead at the same time; the lead is led out from the hollow PVC pipe and connected to the micro-arc oxidation anode electrode; notches are arranged at the edges of two sides of the PVC clamping plate, so that the clamp can be quickly and conveniently fixed in a micro-arc oxidation tank; the spring is used for mechanical movement of opening and closing the clamp. The acid and alkali resistant sealing rubber ring is corrosion resistant and high temperature resistant rubber. The conductive wire is led out from the hollow PVC pipe and is connected with the anode electrode, current finally reaches a workpiece through the conductive wire and the electrode, and the rest parts except the electrode and the spring in the clamp handle are made of insulating corrosion-resistant materials. When the micro-arc oxidation experiment is carried out, the clamp clamps and fixes the workpiece through the spring, meanwhile, the electrode is in close contact with the workpiece under the action of the elastic PVC sheet to realize electric conduction, and the electrode is protected by the PVC pipe and the acid and alkali resistant sealing rubber ring and isolated from the electrolyte, so that the normal operation of the experiment is ensured. After the experiment is finished, the clamp can be directly taken out without excessive treatment and cleaning of the electrode and the clamp.

The clamping integrated micro-arc oxidation clamp comprises the following specific operation steps:

a) before micro-arc oxidation, whether the PVC clamping plate and the acid-base resistant sealing rubber ring are smooth or not is checked so as to avoid influencing the experiment, the workpiece to be tested is clamped by the clamp, the conductive electrode is in close contact with the workpiece under the elastic expansion action of the PVC plate with the elastic structure to realize conduction, meanwhile, the PVC pipe cavity is in close contact with the workpiece through the spring of the clamp and simultaneously protects the electrode in the cavity, and at the moment, the acid-base resistant sealing rubber ring and the corresponding PVC plate are in close contact with the surface of the workpiece to prevent the electrolyte from flowing in;

b) the clamped fixture and the whole workpiece are combined and fixed with an electrolytic bath through a groove on the edge of PVC, and are immersed in electrolyte together for micro-arc oxidation;

c) connecting a lead led out from the clamp handle with the anode of a power supply, and performing micro-arc oxidation experiments after other normal operations of other micro-arc oxidation are performed;

d) and (c) after the oxidation is finished, taking out the clamp and the workpiece to perform simple wiping, and then continuously repeating the steps b and c.