A stainless steel cavity surface treatment device with electrolytic polishing function

Abstract

The application relates to the technical field of electrolytic polishing, and discloses a stainless steel cavity surface treatment device with an electrolytic polishing function, which comprises an electrolytic machine and an electrolytic tank arranged on the electrolytic machine, and linear driving mechanisms are arranged on the two sides of the electrolytic machine and extend along the height direction of the electrolytic machine. The stainless steel cavity surface treatment device with the electrolytic polishing function is provided with a pumping pipe at the top end of a limiting pipe and is equipped with a pump body, so that the electrolyte in the stainless steel container can be pumped and circulated, the flowability and the updating speed of the electrolyte on the inner wall of the container are effectively improved, the bubble adhesion is reduced, the problem of uneven metal dissolution caused by slow electrolyte updating is avoided, the generation of surface defects such as pitting, mottling and scratches is reduced, the uniformity of the surface color of the workpiece is ensured, the quality of the electrolytic polishing is improved, and meanwhile, the electrolyte is filtered after being pumped through a return pipe and is then delivered back to the electrolytic tank, so that the electrolyte can be recycled.

Description

Technical Field

[0001] This invention relates to the field of electropolishing technology, specifically to a stainless steel cavity surface treatment device with electropolishing function. Background Technology

[0002] In the processing and manufacturing of stainless steel products, the surface quality of stainless steel cavities is crucial, affecting not only the product's aesthetic appearance but also its key performance indicators such as corrosion resistance, wear resistance, and service life. Electropolishing, as an advanced metal surface treatment technology, has been widely used in the surface treatment of stainless steel cavities due to its unique advantages.

[0003] Electrolytic polishing utilizes electrochemical principles. In a specific electrolyte solution, with the stainless steel workpiece as the anode and an insoluble metal as the cathode, under the influence of direct current, the microscopic protrusions on the workpiece surface preferentially dissolve, achieving a smooth and bright surface. Compared to traditional mechanical polishing methods, electrolytic polishing offers numerous significant advantages. It can achieve uniform polishing of complex-shaped workpieces, resulting in low surface roughness, high smoothness, and no mechanical stress on the surface, avoiding defects such as microcracks that may be caused by machining, effectively improving the overall performance of stainless steel cavities.

[0004] Existing stainless steel cavity electrolytic polishing equipment has low electrolyte flow inside the container. Poor electrolyte flow can lead to slow electrolyte renewal in local areas of the workpiece surface, resulting in uneven metal dissolution in these areas. This can cause surface defects such as pitting, spots, and scratches, as well as uneven workpiece surface color, with some areas appearing dark or shiny. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a stainless steel cavity surface treatment device with electrolytic polishing function, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a stainless steel cavity surface treatment device with electrolytic polishing function, comprising an electrolytic machine and an electrolytic cell set thereon, wherein linear drive mechanisms are installed on both sides of the electrolytic machine along its height direction, a conductive rod is set above the electrolytic cell, the conductive rod is set along the length direction of the electrolytic machine, and a set of suspension components is installed on the conductive rod along the height direction of the electrolytic cell, and the linear drive mechanism is used to drive the conductive rod to rise and fall; The suspension assembly includes a conductive hook with a U-shaped bottom end and a conductive rod radially inserted at the top end. An arc-shaped ring is fixedly connected to the top end of the conductive hook, and the arc-shaped ring abuts against the circumferential surface of the conductive rod. A bolt is threaded to the top end of the conductive hook, and the conductive rod is located between the bolt and the arc-shaped ring. The suspension assembly also includes a limiting tube with a U-shaped bottom end. The top end of each limiting tube is fixedly connected to the same extraction tube, and one end of the extraction tube is equipped with a pulling mechanism, which is used to pull the extraction tube to move linearly along the axis.

[0007] Furthermore, a pump body is mounted on the surface of the electrolysis machine, and the input end of the pump body is connected to one end of the extraction tube via a flexible hose.

[0008] Through the above scheme, when the limiting tube is fixed, it can extract gas or a small amount of electrolyte from inside the container, improving the fluidity and renewal rate of the electrolyte on the inner wall of the container, reducing bubble adhesion. The hose is made of corrosion-resistant fluoroplastic material to ensure stable operation in the electrolyte environment for a long time. The extraction tube and the limiting tube are made of insulating and corrosion-resistant material to ensure that the limiting tube is insulated from the container when immersed in the electrolyte and resists the corrosion of the electrolyte. The pump body is specifically a corrosion-resistant magnetic pump or diaphragm pump. During extraction, its suction range is 100-500Pa, thus avoiding the rapid drop of the electrolyte level inside the container due to excessive suction, which would cause part of the inner wall of the cavity to be exposed above the liquid surface, affecting the polishing effect of that area, or even producing obvious interface marks.

[0009] Furthermore, the output end of the pump body is fixedly connected to a return pipe, which is fixedly connected to the electrolytic cell, and a filter is installed in the middle of the return pipe.

[0010] The above solution uses acid and alkali resistant bag filters or cartridge filters. The model can be selected according to the flow rate and accuracy requirements. It is used to filter out metal dissolved impurities or particulate matter that may be contained in the electrolyte drawn from the container, keeping the electrolyte clean. The filter should be replaced or cleaned regularly to ensure the filtration effect and electropolishing quality.

[0011] Furthermore, the linear drive mechanism includes a cylinder, which is fixedly connected to the electrolysis machine. Two insulating sleeves are fixedly connected to the outer surface of the conductive rod, and the output end of the cylinder is fixedly connected to its corresponding insulating sleeve. Both insulating sleeves have connecting plates fixedly connected to their outer surfaces, and the extraction tube is slidably sleeved with the connecting plates. A hinge plate is fixedly connected to the outer surface of one of the insulating sleeves; The pulling mechanism includes an electric actuator, the bottom end of the housing of which is hinged to a hinge plate, and the output end of which is hinged to one end of the extraction tube.

[0012] The above solution isolates the conductive rod from the driving components, preventing current from being conducted to moving parts such as cylinders, thus improving the safety and reliability of the equipment.

[0013] Furthermore, a guide rod is fixedly connected to the outer surface of another insulating sleeve, and the guide rod is slidably inserted into the electrolysis machine.

[0014] The above scheme guides the lifting and lowering motion of the conductive rod, ensuring a smooth lifting process, preventing swaying, and improving the stability of the suspended container during lifting and electrolysis.

[0015] Furthermore, a one-way valve is installed at the bottom end of the return pipe.

[0016] Through the above solution, the one-way valve allows the electrolyte to flow from the pump body to the electrolytic cell and prevents the electrolyte in the electrolytic cell from flowing back when not in operation, keeping the system clean and avoiding misoperation.

[0017] Furthermore, one end of the conductive rod is connected to the positive terminal of an external rectifier power supply via a cable.

[0018] The above scheme provides a stable and controllable DC power supply for the entire electropolishing circuit, ensuring the effective execution of the electropolishing process.

[0019] Furthermore, the arc-shaped ring is fixed to one side of the top of the conductive hook, and the bolt is threaded to the other side of the top of the conductive hook. The end of the bolt's shank faces the inner arc surface of the arc-shaped ring, and the conductive rod is clamped and fixed between the end of the bolt's shank and the inner arc surface of the arc-shaped ring.

[0020] Furthermore, the hinge plate is vertically fixed to the outer wall of the insulating sleeve, and the bottom end of the housing of the electric push rod is hinged to the hinge plate through a pin. The output shaft axis of the electric push rod is parallel to the axis of the extraction tube. The connecting plate is vertically fixed to the top of the insulating sleeve, and the two connecting plates are symmetrically distributed at both ends of the conductive rod. The axis of the extraction tube is parallel to the axis of the conductive rod.

[0021] Furthermore, the two ends of the filter are respectively threaded and sealed to the upstream and downstream sections of the return pipe. The downstream end of the return pipe penetrates the side wall of the electrolytic cell, and the cavity of the return pipe is in communication with the inner cavity of the electrolytic cell. A one-way valve is fixedly installed inside the downstream section of the return pipe, and the conduction direction of the one-way valve is from the filter to the electrolytic cell.

[0022] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: This stainless steel cavity surface treatment device with electropolishing function realizes the extraction and circulation of electrolyte in stainless steel containers by setting an extraction pipe at the top of the limiting tube and equipping it with a pump. This effectively improves the fluidity and renewal rate of the electrolyte on the inner wall of the container, reduces the adhesion of air bubbles, and avoids the problem of uneven metal dissolution caused by slow electrolyte renewal. In turn, it reduces the generation of surface defects such as pits, spots, and scratches, ensures the uniformity of the workpiece surface color, and improves the quality of electropolishing. At the same time, the extracted electrolyte is filtered and returned to the electrolytic cell through the return pipe, realizing the recycling of electrolyte. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the present invention. Figure 1 ; Figure 2 This is a three-dimensional schematic diagram of the overall structure of the present invention. Figure 2 ; Figure 3 This is a three-dimensional schematic diagram of the overall structure of the present invention. Figure 3 ; Figure 4 This is a structural diagram of the conductive rod of the present invention; Figure 5 This is a structural diagram of the suspension assembly of the present invention.

[0024] In the picture: 1. Electrolytic machine; 101. Electrolytic cell; 2. Linear drive mechanism; 201. Cylinder; 202. Insulating sleeve; 203. Connecting plate; 204. Guide rod; 3. Conductive rod; 4. Suspension assembly; 401. Conductive hook; 402. Arc ring; 403. Bolt; 404. Limiting tube; 405. Extraction tube; 5. Pulling mechanism; 6. Pump body; 7. Return pipe; 8. Filter; 9. Hinge plate; 10. Electric actuator; 11. Check valve. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figures 1-5This embodiment discloses a stainless steel cavity surface treatment device with electrolytic polishing function, including an electrolytic machine 1 and an electrolytic cell 101 set in the electrolytic machine 1. Linear drive mechanisms 2 are installed on both sides of the electrolytic machine 1 along its height direction. A conductive rod 3 is set above the cell of the electrolytic machine 1. The conductive rod 3 is set along the length direction of the electrolytic machine 1. A set of suspension components 4 are installed on the conductive rod 3 along the height direction of the electrolytic cell 101. The linear drive mechanism 2 is used to drive the conductive rod 3 to rise and fall. One end of the conductive rod 3 is connected to the positive terminal of an external rectified power supply through a cable. Through this setting, a stable and controllable DC power supply is provided for the entire electrolytic polishing circuit, ensuring that the electrolytic polishing process is carried out effectively.

[0027] The suspension assembly 4 includes a conductive hook 401, the bottom end of which is U-shaped, and the top end of which is radially inserted into the conductive rod 3. An arc-shaped ring 402 is fixedly connected to the top end of the conductive hook 401, and the arc-shaped ring 402 abuts against the circumferential surface of the conductive rod 3. A bolt 403 is threadedly connected to the top end of the conductive hook 401, and the conductive rod 3 is located between the bolt 403 and the arc-shaped ring 402. The suspension assembly 4 also includes a limiting tube 404, the bottom end of which is U-shaped. In use, the open end of the stainless steel container is facing downwards and is fitted onto the surface of the conductive hook 401 and the limiting tube 404.

[0028] Each limiting tube 404 is fixedly connected to the same extraction tube 405 at its top end. One end of the extraction tube 405 is provided with a pulling mechanism 5, which is used to pull the extraction tube 405 to move linearly in the axial direction, thereby pulling the limiting tube 404 away from or closer to the corresponding conductive hook 401, so as to limit and fix containers with different inner diameters. Secondly, since the container is fixed with its opening facing downward, after electrolysis is completed, the linear drive mechanism 2 drives the container to rise from the electrolysis tank 101, and the electrolyte inside can automatically fall into the interior of the electrolysis tank 101.

[0029] The surface of the electrolyzer 1 is equipped with a pump body 6. The input end of the pump body 6 is connected to one end of the extraction tube 405 through a hose. When the limiting tube 404 is fixed, it can extract gas or a small amount of electrolyte from inside the container, improve the fluidity and renewal rate of the electrolyte on the inner wall of the container, and reduce the adhesion of air bubbles. The hose is made of corrosion-resistant fluoroplastic material to ensure stable operation in the electrolyte environment for a long time. The extraction tube 405 and the limiting tube 404 are made of insulating and corrosion-resistant material to ensure that the limiting tube 404 is insulated from the container when immersed in the electrolyte and resists the corrosion of the electrolyte. The pump body 6 is specifically a corrosion-resistant magnetic pump or diaphragm pump. During extraction, its suction range is 100-500 Pa, thus avoiding a rapid drop in the electrolyte level inside the container due to excessive suction, which would expose part of the inner wall of the cavity above the liquid surface, affecting the polishing effect of that area and even producing obvious interface marks. The output end of the pump body 6 is fixedly connected to a return pipe 7, which is fixedly connected to the electrolytic cell 101. A filter 8 is installed in the middle of the return pipe 7, and the filter 8 is specifically an acid and alkali resistant bag filter. The filter 8, or cartridge filter 8, can be selected according to flow rate and accuracy requirements. It is used to filter out metal dissolved impurities or particulate matter that may be present in the electrolyte drawn from the container, keeping the electrolyte clean. The filter 8 should be replaced or cleaned regularly to ensure filtration effect and electropolishing quality. A one-way valve 11 is installed at the bottom of the return pipe 7. The one-way valve 11 allows the electrolyte to flow from the pump body 6 to the electrolytic tank 101 and prevents the electrolyte in the electrolytic tank 101 from flowing back when not in operation, keeping the system clean and avoiding misoperation.

[0030] The linear drive mechanism 2 includes a cylinder 201, which is fixedly connected to the electrolysis machine 1. Two insulating sleeves 202 are fixedly connected to the outer surface of the conductive rod 3. The output end of the cylinder 201 is fixedly connected to its corresponding insulating sleeve 202. The insulating sleeves 202 isolate the conductive rod 3 from the drive components, preventing current from being conducted to the cylinder 201 and other moving parts, thus improving the safety and reliability of the equipment. Connecting plates 203 are fixedly connected to the outer surfaces of both insulating sleeves 202. The extraction tube 405 is slidably sleeved with the connecting plate 203. A hinge plate 9 is fixedly connected to the outer surface of one of the insulating sleeves 202. The pulling mechanism 5 includes an electric push rod 10. The bottom end of the shell is hinged to the hinge plate 9, and the output end of the electric push rod 10 is hinged to one end of the extraction tube 405. The electric push rod 10 drives the output end to extend and retract, which can pull the extraction tube 405 to move along its axial direction, thereby driving all the limit tubes 404 to move away from or closer to the corresponding conductive hooks 401 at the same time, so as to realize rapid adjustment to adapt to containers of different diameters. After adjustment, it can be locked to maintain the position. Another insulating sleeve 202 has a guide rod 204 fixedly connected to its outer surface. The guide rod 204 is slidably inserted into the electrolysis machine 1. The guide rod 204 provides guidance for the lifting and lowering movement of the conductive rod 3, ensuring that the lifting and lowering process is smooth, preventing shaking, and improving the stability of the suspended container during the lifting and electrolysis process.

[0031] In this invention, the arc-shaped ring 402 is fixed to one side of the top of the conductive hook 401, and the bolt 403 is threaded to the other side of the top of the conductive hook 401. The end of the bolt 403 faces the inner arc surface of the arc-shaped ring 402, and the conductive rod 3 is clamped and fixed between the end of the bolt 403 and the inner arc surface of the arc-shaped ring 402.

[0032] In this invention, the hinge plate 9 is vertically fixed to the outer wall of the insulating sleeve 202, and the bottom end of the housing of the electric push rod 10 is hinged to the hinge plate 9 by a pin. The output shaft axis of the electric push rod 10 is parallel to the axis of the extraction tube 405. The connecting plate 203 is vertically fixed to the top end of the insulating sleeve 202, and the two connecting plates 203 are symmetrically distributed at both ends of the conductive rod 3. The axis of the extraction tube 405 is parallel to the axis of the conductive rod 3.

[0033] In this invention, the two ends of the filter 8 are respectively threaded and sealed to the upstream and downstream sections of the return pipe 7. The downstream end of the return pipe 7 penetrates the side wall of the electrolytic cell 101, and the cavity of the return pipe 7 communicates with the inner cavity of the electrolytic cell 101. The one-way valve 11 is fixedly installed inside the downstream section of the return pipe 7, and the conduction direction of the one-way valve 11 is from the filter 8 to the electrolytic cell 101.

[0034] The working principle of the above embodiment is as follows: When the device is working, the container is first fixed. According to the inner diameter of the stainless steel container, the electric push rod 10 in the pulling mechanism 5 is activated. Its output end extends and retracts to pull the extraction tube 405 axially linearly, causing the limiting tube 404 to move away from or closer to the conductive hook 401. The container is then placed with its opening facing down on the surface of the conductive hook 401 and the limiting tube 404, thus achieving the limiting and fixing of containers with different inner diameters. The output end of the cylinder 201 pushes the insulating sleeve 202 and the connected conductive rod 3 to descend. The guide rod 204 provides guidance for the lifting and lowering of the conductive rod 3, ensuring a smooth descent, so that the container is immersed in the electrolyte of the electrolytic tank 101. Then, the external rectified power supply is turned on, and the current is conducted to the conductive rod 3 through the cable, and then to the container through the conductive hook 401, forming a current distribution. An electrolytic polishing circuit is formed to perform electrolytic polishing treatment on the inner wall of the container. During the electrolysis process, the pump body 6 is started, and gas or a small amount of electrolyte is extracted from the inside of the container through the corrosion-resistant fluoroplastic hose and the extraction pipe 405. This improves the fluidity and renewal rate of the electrolyte on the inner wall of the container and reduces the adhesion of air bubbles. The extracted electrolyte is filtered by the filter 8 on the return pipe 7 to remove metal dissolved impurities or particulate matter and keep the electrolyte clean. The one-way valve 11 prevents the electrolyte in the electrolytic tank 101 from flowing back. After the electrolysis is completed, the cylinder 201 of the linear drive mechanism 2 drives the container to rise from the electrolytic tank 101, and the electrolyte in the container automatically falls back into the electrolytic tank 101. Finally, the filter 8 can be replaced or cleaned periodically according to its usage to ensure the filtration effect and the quality of electrolytic polishing.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stainless steel cavity surface treatment device with electrolytic polishing function, comprising an electrolytic machine (1) and an electrolytic cell (101) provided in the electrolytic machine (1), characterized in that: The electrolytic machine (1) is equipped with linear drive mechanisms (2) arranged along its height direction on both sides. A conductive rod (3) is arranged above the electrolytic machine (1) tank. The conductive rod (3) is arranged along the length direction of the electrolytic machine (1). A set of suspension components (4) arranged along the height direction of the electrolytic cell (101) is installed on the conductive rod (3). The linear drive mechanism (2) is used to drive the conductive rod (3) to rise and fall. The suspension assembly (4) includes a conductive hook (401), the bottom end of which is U-shaped, the top end of which is radially inserted into the conductive rod (3), and an arc ring (402) is fixedly connected to the top end of the conductive hook (401). The arc ring (402) abuts against the circumferential surface of the conductive rod (3). A bolt (403) is threadedly connected to the top end of the conductive hook (401), and the conductive rod (3) is located between the bolt (403) and the arc ring (402). The suspension assembly (4) also includes a limiting tube (404), the bottom end of which is U-shaped. Each limiting tube (404) is fixedly connected to the same extraction tube (405) at its top end. One end of the extraction tube (405) is provided with a pulling mechanism (5), which is used to pull the extraction tube (405) to move linearly in the axial direction.

2. The stainless steel cavity surface treatment device with electrolytic polishing function according to claim 1, characterized in that: The surface of the electrolysis machine (1) is equipped with a pump body (6), and the input end of the pump body (6) is connected to one end of the extraction tube (405) through a hose.

3. The stainless steel cavity surface treatment device with electrolytic polishing function according to claim 2, characterized in that: The output end of the pump body (6) is fixedly connected to a return pipe (7), which is fixedly connected to the electrolytic cell (101). A filter (8) is installed in the middle of the return pipe (7).

4. The stainless steel cavity surface treatment device with electrolytic polishing function according to claim 1, characterized in that: The linear drive mechanism (2) includes a cylinder (201), which is fixedly connected to the electrolyzer (1). Two insulating sleeves (202) are fixedly connected to the outer surface of the conductive rod (3), and the output end of the cylinder (201) is fixedly connected to its corresponding insulating sleeve (202). The outer surfaces of the two insulating sleeves (202) are fixedly connected with connecting plates (203), and the extraction tube (405) is slidably sleeved with the connecting plates (203); A hinge plate (9) is fixedly connected to the outer surface of one of the insulating sleeves (202); The pulling mechanism (5) includes an electric push rod (10), the bottom end of the housing of the electric push rod (10) is hinged to the hinge plate (9), and the output end of the electric push rod (10) is hinged to one end of the extraction tube (405).

5. A stainless steel cavity surface treatment device with electrolytic polishing function according to claim 4, characterized in that: Another insulating sleeve (202) has a guide rod (204) fixedly connected to its outer surface, and the guide rod (204) is slidably inserted into the electrolysis machine (1).

6. The stainless steel cavity surface treatment device with electrolytic polishing function according to claim 3, characterized in that: A one-way valve (11) is installed at the bottom of the return pipe (7).

7. The stainless steel cavity surface treatment device with electrolytic polishing function according to claim 1, characterized in that: One end of the conductive rod (3) is connected to the positive terminal of an external rectifier power supply via a cable.

8. The stainless steel cavity surface treatment device with electrolytic polishing function according to claim 1, characterized in that: The arc-shaped ring (402) is fixed to one side of the top of the conductive hook (401), and the bolt (403) is threaded to the other side of the top of the conductive hook (401). The end of the bolt (403) faces the inner arc surface of the arc-shaped ring (402), and the conductive rod (3) is clamped and fixed between the end of the bolt (403) and the inner arc surface of the arc-shaped ring (402).

9. A stainless steel cavity surface treatment device with electrolytic polishing function according to claim 4, characterized in that: The hinge plate (9) is vertically fixed to the outer wall of the insulating sleeve (202). The bottom end of the housing of the electric push rod (10) is hinged to the hinge plate (9) by a pin. The output shaft axis of the electric push rod (10) is parallel to the axis of the extraction tube (405). The connecting plate (203) is vertically fixed to the top of the insulating sleeve (202). The two connecting plates (203) are symmetrically distributed at both ends of the conductive rod (3). The axis of the extraction tube (405) is parallel to the axis of the conductive rod (3).

10. A stainless steel cavity surface treatment device with electrolytic polishing function according to claim 3, characterized in that: The two ends of the filter (8) are threadedly sealed to the upstream and downstream sections of the return pipe (7), respectively. The downstream end of the return pipe (7) penetrates the side wall of the electrolytic cell (101), and the cavity of the return pipe (7) is in communication with the inner cavity of the electrolytic cell (101). The one-way valve (11) is fixedly installed inside the downstream section of the return pipe (7), and the conduction direction of the one-way valve (11) is from the filter (8) to the electrolytic cell (101).

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