A micro-arc oxidation device with cooling and stirring functions

Abstract

The utility model relates to the technical field of micro-arc oxidation relates to a micro-arc oxidation device with cooling and stirring function, include: the reaction tank is the open structure of upper end, is provided with tubular cathode body along the inner wall of reaction tank, the lower end of reaction tank is fixed through setting fixed structure and is fixed to the workpiece to be processed, tubular cathode body is connected with the negative pole of micro-arc oxidation power supply, the workpiece to be processed is connected with the anode of micro-arc oxidation power supply, tubular cathode body and the reaction tank are all filled with same electrolyte, the tubular cathode body is opened and has the water hole, under the action of cooling machine, when electrolyte carries out cooling circulation, the electrolyte in tubular cathode body will be spouted outward through the water hole, accelerates the circulating flow of electrolyte in reaction tank. The micro-arc oxidation device provided by the utility model solves the problem of the preparation of the micro-arc oxidation layer on the surface of the special-shaped workpiece by optimizing the distribution of the reaction electric field, and improves the coating preparation efficiency.

Description

Technical Field

[0001] This invention belongs to the field of micro-arc oxidation technology and relates to a micro-arc oxidation device that also has cooling and stirring functions. Background Technology

[0002] Micro-arc oxidation evolved from anodic oxidation, relying on the combination of electrolyte and power supply parameters to prepare an oxide ceramic layer with high hardness, wear resistance, corrosion resistance, and excellent insulation properties on the surface of valve metal. As the application of micro-arc oxidation becomes more widespread and the structures of the processed workpieces become increasingly complex, various quality problems have arisen in the preparation of oxide layers on irregularly shaped surfaces.

[0003] Existing reaction tanks typically have one or two pairs of cathode plates arranged on the tank wall. For irregularly shaped workpieces with complex structures and large areas, slow growth of the oxide layer on the non-cathode-corresponding surface and uneven color are prone to occur. If the workpiece clamping orientation is adjusted during coating preparation for secondary oxidation treatment, it will lead to problems such as low processing efficiency, uneven overall coating thickness, and color difference.

[0004] In view of this, this utility model is hereby proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a micro-arc oxidation device that combines cooling and stirring functions. By optimizing the distribution of the reaction electric field, it solves the problem of preparing micro-arc oxidation layers on the surface of irregularly shaped workpieces and improves the coating preparation efficiency.

[0006] To achieve the above-mentioned functions, this utility model provides the following technical solution:

[0007] This utility model provides a micro-arc oxidation device with both cooling and stirring functions, including: a reaction tank, the reaction tank having an open structure at the top, a tubular cathode body arranged along the inner wall of the reaction tank, the lower end of the reaction tank being fixed to the workpiece by a fixing structure, the tubular cathode body being connected to the negative electrode of a micro-arc oxidation power source, and the workpiece being connected to the anode of the micro-arc oxidation power source.

[0008] Both the tubular cathode and the reaction tank contain the same electrolyte. The tubular cathode has a water outlet. When the electrolyte is cooled and circulated by the cooler, the electrolyte in the tubular cathode will be sprayed out through the water outlet, accelerating the circulation of the electrolyte in the reaction tank.

[0009] Furthermore, one end of the tubular cathode body is a water inlet, which is connected to the second water outlet on the cooler through the first water inlet on the reaction tank. The other end of the tubular cathode body is a water outlet, through which the cooled electrolyte in the tubular cathode body is introduced into the reaction tank.

[0010] Furthermore, the water outlet is an inwardly tapered pipe opening.

[0011] Furthermore, the reaction tank is provided with a first water outlet, which is connected to a second water inlet on the cooler.

[0012] Furthermore, the tubular cathode body is a stainless steel tube, which is arranged in a uniformly bent pattern along the bottom and sidewalls of the reaction tank.

[0013] Furthermore, the surface of the tubular cathode body is covered with a PP porous plate.

[0014] Furthermore, the water outlet holes are evenly distributed on the tubular cathode bodies arranged at the bottom of the reaction tank.

[0015] Furthermore, the diameter of the water outlet hole is 2-5 mm.

[0016] Furthermore, the flow rate provided by the cooler is 20-100 L / min.

[0017] Furthermore, a stainless steel cathode plate is hinged to the top of the tubular cathode body.

[0018] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0019] 1. The micro-arc oxidation device of this utility model, which combines cooling and stirring functions, adopts a tubular cathode body to optimize the uniformity of the reaction electric field, effectively solves the problem of uneven oxide layer growth on the surface of irregular workpieces, and improves the coating growth efficiency.

[0020] 2. The micro-arc oxidation device of this utility model, which combines cooling and stirring functions, connects the tubular cathode body to the cooler, thus taking into account the function of cooling the electrolyte in the micro-arc oxidation reaction.

[0021] 3. The micro-arc oxidation device of this utility model, which combines cooling and stirring functions, has water outlet holes evenly opened on the tubular cathode body located at the bottom of the reaction tank. Since the water outlet of the tubular cathode body is set as an inwardly constricting conical pipe or a booster pump is set at the front end of the water inlet of the tubular cathode body, the cooled electrolyte is sprayed out through the water outlet holes under the action of water pressure, which plays a role in stirring and promoting the circulation of the electrolyte in the reaction tank. Attached Figure Description

[0022] The accompanying drawings are incorporated in and form part of this specification, and together with the description, serve to explain the principles of this invention.

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the micro-arc oxidation device of this utility model that also has cooling and stirring functions;

[0025] Figure 2 This is a top view of the micro-arc oxidation device of this utility model, which also has cooling and stirring functions.

[0026] Figure 3 A schematic diagram showing the structure of the reaction tank with a first water inlet and a first water outlet in the micro-arc oxidation device of this utility model that also has cooling and stirring functions;

[0027] Figure 4 This is a schematic diagram of the tubular cathode body in the micro-arc oxidation device with both cooling and stirring functions of this utility model.

[0028] Figure 5 This is a top view of the tubular cathode body in the micro-arc oxidation device of this utility model, which also has cooling and stirring functions.

[0029] Wherein: 10-reaction tank; 101-first water inlet; 102-first water outlet; 20-tubular cathode body; 201-water inlet; 202-water outlet; 203-water outlet; 30-cooler; 301-second water outlet; 302-second water inlet. Detailed Implementation

[0030] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this invention. Rather, they are merely examples consistent with some aspects of this invention as detailed in the appended claims.

[0031] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0032] See Figure 1-5As shown, this utility model provides a micro-arc oxidation device with both cooling and stirring functions, including: a reaction tank 10, a tubular cathode body 20 disposed in the reaction tank 10, and the reaction tank 10 connected to a cooler 30. The reaction tank 10 has an open top structure, and the tubular cathode body 20 is disposed along the inner wall of the reaction tank 10. The lower end of the reaction tank 10 is fixed to the workpiece by a fixing structure. A stainless steel cathode plate is hinged to the top of the tubular cathode body 20, forming an all-around surrounding cathode structure with the tubular cathode body 20, improving the uniformity of the electric field distribution. The tubular cathode body 20 is connected to the negative electrode of the micro-arc oxidation power supply, and the workpiece is connected to the anode of the micro-arc oxidation power supply. Specifically, a fixing structure is disposed inside the reaction tank 10 for fixing the anode, and the fixing structure is fixedly connected to the bottom wall of the reaction tank 10. Both the tubular cathode body 20 and the reaction tank 10 are filled with the same electrolyte. The tubular cathode body 20 is provided with a water outlet 202. Since the water outlet 203 of the tubular cathode body 20 is set as an inwardly constricting conical opening, or a booster pump is set at the front end of the water inlet 201 of the tubular cathode body 20, or a regulating valve is set at the water outlet 203, by increasing the pressure of the liquid in the tubular cathode body 20, the cooled electrolyte will be sprayed outward through the water outlet 202, accelerating the circulation of the electrolyte in the reaction tank 10.

[0033] Specifically, the diameter of the water outlet is 2-5mm, which can be selected according to the actual situation. The flow rate provided by the cooler involved in this utility model is 20-100L / min. The micro-arc oxidation device of this utility model is still applicable to coolers with other flow rates.

[0034] Specifically, the reaction tank 10 has a cuboid structure, with a first inlet 101 and a first outlet 102 on each of the front walls. The tubular cathode body 20 is made of stainless steel tubing, bent into a coil shape according to the shape of the reaction tank 10 and attached to the bottom and four sides of the reaction tank 10. Because the tubular cathode body 20 itself has a certain rigidity, it forms a square frame structure that adapts to the reaction tank 10. There is a small gap between the square frame structure and the reaction tank 10, so the tubular cathode body 20 does not need to be fixed to the reaction tank 10. If the distance between the tubular cathode body 20 and the wall of the reaction tank 10 is large and fixing is required, it can be fixed by clips or other detachable structures.

[0035] Specifically, in order to cause the liquid in the tubular cathode 20 to be sprayed out through the water outlet 202, a cover plate can be placed above the reaction tank 10 during the cooling cycle, so that the top of the reaction tank 10 is semi-open.

[0036] Specifically, one end of the tubular cathode 20 is a water inlet 201, which connects to the second water outlet 301 of the cooler 30 via a first water inlet 101 on the reaction tank 10. The other end of the tubular cathode 20 is an open structure, allowing the cooled electrolyte in the tubular cathode 20 to flow into the reaction tank 10. A first water outlet 102 is provided on the reaction tank 10, which connects to the second water inlet 302 on the cooler 30. This allows the electrolyte in the reaction tank 10 to be drawn from the first water outlet 102 into the second water inlet 302, thus completing the electrolyte cooling cycle. The electrolyte cooled by the cooler 30 flows into the tubular cathode 20 to exchange heat with the electrolyte in the reaction tank 10, achieving the purpose of cooling. Furthermore, the tubular cathode 20 has a three-dimensional structure, resulting in a more uniform cooling effect.

[0037] Specifically, the tubular cathode 20 is a continuous stainless steel tube, which is evenly bent and arranged along the bottom and side walls of the reaction tank 10. A PP perforated plate covers the surface of the tubular cathode 20 to prevent short circuits caused by contact between the anode and the tubular cathode 20. The stainless steel tube, as the cathode material, is bent and arranged according to the shape of the reaction tank 10 and fixed to the tank wall. A stainless steel plate is hinged to the top. This tubular cathode 20 allows the workpiece to be processed to be surrounded from all directions during micro-arc oxidation, forming a uniform electric field with each surface of the workpiece, which is beneficial for the uniform growth of the coating.

[0038] Specifically, the tubular cathode body 20 located at the bottom has multiple water outlet holes 202 evenly opened at the upper end. When the cooled electrolyte flows through the tubular cathode body 20, it is sprayed outward through the water outlet holes 202 during the entire cooling and heat exchange process, which accelerates the circulation of electrolyte in the reaction tank 10, prevents the gas generated by the anode from staying on the surface of the workpiece to be processed and causing surface damage, and also helps to cool the electrode liquid evenly.

[0039] The working principle of this micro-arc oxidation device, which combines cooling and stirring functions, is as follows:

[0040] The workpiece to be processed is placed in the reaction tank 10, where it is fixed as the anode by a fixing structure. A tubular cathode 20 is installed inside the reaction tank 10, enabling the preparation of a micro-arc oxidation layer on irregularly shaped and complex workpieces. During processing, the tubular cathode 20 forms a uniform electric field with each surface of the workpiece, ensuring uniform coating growth. Furthermore, a cooler 30 is connected to the tubular cathode 20, allowing the cooled electrolyte to flow inside the tubular cathode 20 and exchange heat with the electrolyte in the reaction tank 10. The tubular cathode 20, acting as the cathode, enhances the cooling effect with its three-dimensional structure. Throughout the processing, water outlets 202 evenly distributed at the top of the tubular cathode 20 continuously spray the electrolyte flowing within it, promoting internal circulation of the electrolyte within the reaction tank 10 and ensuring uniform electrolyte concentration.

[0041] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this utility model.

[0042] It should be understood that this utility model is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A micro-arc oxidation device with both cooling and stirring functions, characterized in that, include: The reaction tank (10) has an open structure at the top. A tubular cathode body (20) is provided on the inner wall of the reaction tank (10). The lower end of the reaction tank (10) is fixed by a fixing structure. The tubular cathode body (20) is connected to the negative electrode of the micro-arc oxidation power supply. The workpiece to be processed is connected to the anode of the micro-arc oxidation power supply. The tubular cathode body (20) and the reaction tank (10) are both filled with the same electrolyte. The tubular cathode body (20) has a water outlet hole (202). When the electrolyte is cooled and circulated under the action of the cooler (30), the electrolyte in the tubular cathode body (20) will be sprayed out through the water outlet hole (202) to accelerate the circulation of the electrolyte in the reaction tank (10).

2. The micro-arc oxidation device with both cooling and stirring functions according to claim 1, characterized in that, One end of the tubular cathode body (20) is a water inlet (201), which is connected to the second water outlet (301) on the cooler (30) through the first water inlet (101) on the reaction tank (10). The other end of the tubular cathode body (20) is a water outlet (203), through which the cooled electrolyte in the tubular cathode body (20) is introduced into the reaction tank (10).

3. The micro-arc oxidation device with both cooling and stirring functions according to claim 2, characterized in that, The water outlet (203) is an inwardly tapered pipe opening.

4. The micro-arc oxidation device with both cooling and stirring functions according to claim 1, characterized in that, The reaction tank (10) is provided with a first water outlet (102), which is connected to the second water inlet (302) on the cooler (30).

5. The micro-arc oxidation device with both cooling and stirring functions according to claim 1, characterized in that, The tubular cathode (20) is a stainless steel tube, which is arranged in a uniformly bent pattern along the bottom and sidewalls of the reaction tank (10).

6. The micro-arc oxidation device with both cooling and stirring functions according to claim 1, characterized in that, The surface of the tubular cathode (20) is covered with a PP porous plate.

7. The micro-arc oxidation device with both cooling and stirring functions according to claim 1, characterized in that, The water outlet holes (202) are evenly distributed on the tubular cathode bodies (20) arranged at the bottom of the reaction tank (10).

8. The micro-arc oxidation device with both cooling and stirring functions according to claim 1, characterized in that, The diameter of the water outlet (202) is 2-5mm.

9. The micro-arc oxidation device with both cooling and stirring functions according to claim 1, characterized in that, The flow rate provided by the cooler (30) is 20-100 L / min.

10. The micro-arc oxidation device with both cooling and stirring functions according to claim 1, characterized in that, The top of the tubular cathode body (20) is hinged to a stainless steel cathode plate.

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