Electrolytic polishing device for magnesium alloy intravascular stent

Through the design of threaded rod driven by partition electrolytic cell and guide frame, the problem of polishing blind spots and electrolyte flow synchronization in electrolytic polishing device of magnesium alloy vascular support is solved, achieving efficient and stable polishing and cleaning effects.

CN120250132APending Publication Date: 2025-07-04RIZHAO TIANYI BIOMEDICAL PTE LTD
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Patent Information

Application Number
CN202510482522.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-17
Publication Date
2025-07-04

AI Technical Summary

Technical Problem

In the existing electrolytic polishing device of magnesium alloy vascular stent, the contact position of the magnesium alloy vascular stent and the hook is a blind spot, which affects the polishing integrity, and the synchronous synchronization of the electrolyte flow and the movement of the stent, resulting in poor polishing quality.

Method used

An electrolytic polishing device for magnesium alloy vascular support is designed, using a partitioned electrolytic cell, combined with a guide frame, a motor-driven threaded rod and a sliding frame, to realize the multi-directional movement of the magnesium alloy vascular support and the flow of the electrolyte. It reduces the hydrogen evolution reaction through the negative electrode terminal and the pulse power supply, and is equipped with a sensor to monitor the status of the electrolyte.

Benefits of technology

It improves the polishing effect, eliminates the polishing blind spots, enhances the flow of the electrolyte and the multi-directional movement of the bracket, ensures the polishing quality and cleaning effect, and improves the operation convenience and the stability of the electrolytic process.

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Abstract

The invention discloses an electrolytic polishing device for a magnesium alloy intravascular stent, and relates to the technical field of electrolytic polishing. A partition plate is fixed in the middle of the interior of the electrolytic tank and divides the electrolytic tank into two areas, the left area is filled with electrolyte, and the right area is filled with cleaning fluid; two guide frames are fixed to the top end face of the electrolytic bath through screws, and a mounting frame of a concave structure is arranged on the two guide frames in a sliding mode. A connecting block is fixed to the right side of the top end face of the electrolytic tank. From the aspect of polishing effect, the advantages are very prominent. In the electrolysis assembly, the coil connected with the cathode binding post enhances the cathode effect, and is connected with the cathode of the pulse power supply to effectively reduce the hydrogen evolution reaction and optimize the electrolysis process. When the sliding frame moves downwards, the stress rod interacts with the protrusion, the tooth row drives the gear to achieve reciprocating rotation of the rotating shaft and the magnesium alloy intravascular stent, meanwhile, the spiral spring drives the magnesium alloy intravascular stent to move up and down under vibration, and the contact effect between the magnesium alloy intravascular stent and electroplating liquid is greatly improved.
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Description

Technical Field

[0001] The present invention relates to the technical field of electrolytic polishing, and particularly to an electrolytic polishing device for magnesium alloy vascular stents. Background Art

[0002] A magnesium alloy vascular stent is a medical device made of magnesium alloy material and used for treating vascular stenosis or obstructive diseases. When processing a magnesium alloy vascular stent, an electrolytic polishing device is required; electrolytic polishing, also known as electrochemically polishing, is a technique for finely machining the surface of a metal through an electrochemical action. In this technique, the workpiece to be polished serves as the anode, and an insoluble metal serves as the cathode. The two electrodes are simultaneously immersed in a specific electrolytic cell, and a direct current is passed through, causing selective dissolution of the anode metal, and ultimately achieving a significant increase in the surface brightness of the magnesium alloy vascular stent. Currently, during the electrolytic polishing process of existing devices, the contact position between the magnesium alloy vascular stent and the hook is a polishing dead angle, which affects the integrity of polishing; during the polishing process of existing devices, it is not possible to simultaneously accelerate the flow of the electrolyte and the multi-directional movement of the magnesium alloy vascular stent in the polishing solution, which affects the overall electrolytic polishing quality. Summary of the Invention

[0003] The present invention relates to an electrolytic polishing device for magnesium alloy vascular stents, which solves the problems that during the electrolytic polishing process of existing devices, the contact position between the magnesium alloy vascular stent and the hook is a polishing dead angle, affecting the integrity of polishing; during the polishing process of existing devices, it is not possible to simultaneously accelerate the flow of the electrolyte and the multi-directional movement of the magnesium alloy vascular stent in the polishing solution, affecting the overall electrolytic polishing quality.

[0004] The present invention provides an electrolytic polishing device for magnesium alloy vascular stents, which specifically includes an electrolytic cell; a partition is fixed at the middle position inside the electrolytic cell, and the partition divides the electrolytic cell into two regions. The left region is filled with an electrolyte, and the right region is filled with a cleaning solution; two guiding frames are fixed on the top surface of the electrolytic cell through screws, and a mounting frame with a concave structure slides on the two guiding frames; a connecting block is fixed at the right position on the top surface of the electrolytic cell, and a first motor is fixed on the right end surface of the mounting frame. A first threaded rod is fixed on the output shaft of the first motor, and the first threaded rod is threadedly connected to the connecting block; a sliding frame slides on the mounting frame, and the mounting frame, the guiding frames, the connecting block, the first motor, the first threaded rod, the sliding frame, the second motor, and the second threaded rod together form an adjustment assembly.

[0005] Further, a second motor is fixed on the top surface of the sliding frame, and a second threaded rod is fixed on the output shaft of the second motor. The second threaded rod is threadedly connected to the mounting frame.

[0006] Further, an electrolysis assembly is installed on the electrolytic cell. The electrolysis assembly includes a negative terminal, a coil, a rotating shaft, a helical spring, a ceramic connecting block, a metal hook, a protrusion, a gear, a toothed row, a spring rod, a stress rod, and a contact seat. The negative terminal is fixed on the electrolytic cell. One end of the lower part of the negative terminal is welded with a coil, and the coil is located in the left area of the electrolytic cell. The negative terminal is electrically connected to the negative electrode of the pulse power supply.

[0007] Further, four rotating shafts are rotatably arranged on the sliding frame in a linear array, and a gear is welded above each rotating shaft; a toothed row slides back and forth on the sliding frame, and the toothed row meshes with the four gears. A spring rod is fixed on the sliding frame, and the protruding end of the spring rod is fixed on the toothed row. A stress rod is welded on the front end face of the toothed row, and the front end of the stress rod is in contact with the front end face of the inner wall of the mounting frame. The front end face of the inner wall of the mounting frame is welded with protrusions in a linear array, and the protrusions are semi-cylindrical structures. When the sliding frame moves downward, the stress rod is in a continuous elastic contact state with the protrusions, and the toothed row moves back and forth under the extrusion of the protrusions.

[0008] Further, a helical spring is welded to one end of the lower part of each rotating shaft, and a ceramic connecting block is fixed to one end of the lower part of each helical spring. A metal hook is fixed to the bottom end face of each ceramic connecting block, and the metal hook is used for hanging the magnesium alloy vascular stent.

[0009] Further, the metal hook is formed by bending a cylindrical rod.

[0010] Further, a contact seat made of metal is fixed to the bottom end face of the sliding frame. The contact seat is of a concave structure, and the four metal hooks all slide on the contact seat. The contact seat is electrically connected to the anode of the pulse power supply.

[0011] Further, an auxiliary assembly is installed on the sliding frame. The auxiliary assembly includes a mounting arm and an auxiliary plate. Four mounting arms are welded to the bottom end face of the sliding frame, and an auxiliary plate is welded to the bottom end face of each mounting arm. The auxiliary plate is of a circular plate structure, and the auxiliary plate is located directly below the metal hook. Circular holes are formed in the auxiliary plate in an annular array.

[0012] Further, a bracket is fixed to the left end face of the electrolytic cell, and an electrolysis regulator is placed on the bracket. A pH sensor, a conductivity sensor, and a temperature sensor are installed in the electrolytic cell, and the pH sensor, the conductivity sensor, and the temperature sensor are all electrically connected to the electrolysis regulator.

[0013] The present invention provides an electrolytic polishing device for magnesium alloy vascular stents, which has the following beneficial effects: 1. From the perspective of the polishing effect, the advantages of the present invention are very prominent; in the electrolysis assembly, the coil connected to the negative terminal enhances the effect of the negative electrode. Being connected to the negative terminal of the pulse power supply effectively reduces the hydrogen evolution reaction and optimizes the electrolysis process. When the sliding frame moves downward, the force rod and the protrusion interact with each other, causing the tooth row to drive the gear to realize the reciprocating rotation of the rotating shaft and the magnesium alloy vascular stent. At the same time, the helical spring drives the magnesium alloy vascular stent to move up and down under vibration, greatly increasing the contact with the electroplating solution and improving the polishing effect. The metal hook has a small contact area, avoiding affecting the polishing. The contact seat is connected to the anode to further reduce hydrogen evolution and ensure the stable connection between the anode and the magnesium alloy vascular stent. When the auxiliary plate of the auxiliary assembly descends, the jet flow formed by the circular hole not only eliminates the polishing dead angle but also promotes the mixing of the electroplating solution, improving the electroplating quality.

[0014] 2. In terms of the operation convenience of the present invention, the adjustment assembly is ingeniously designed; by driving the first threaded rod to rotate with the first motor, the left and right position adjustment of the mounting frame and the magnesium alloy vascular stent can be easily achieved; by driving the second threaded rod to rotate with the second motor, the height of the sliding frame and the magnesium alloy vascular stent can be flexibly changed. This design enables the operator to quickly adjust the position of the magnesium alloy vascular stent according to different requirements, greatly improving the work efficiency. Through the above design, it is convenient for both the polishing of the magnesium alloy vascular stent and the cleaning of the polishing. Moreover, driving the magnesium alloy vascular stent to move left and right or up and down during the polishing process can better achieve the contact between the magnesium alloy vascular stent and the electroplating liquid, thereby further improving the polishing effect of the magnesium alloy vascular stent, with high practicality.

[0015] 3. In terms of the cleaning function of the present invention, the device is reasonably designed; by driving the first and second motors, the magnesium alloy vascular stent can be conveniently transferred from the electrolyte to the cleaning liquid for cleaning. And during the cleaning process, the magnesium alloy vascular stent can still rotate, move up and down, and be cleaned by jet flow, ensuring the cleaning effect. In addition, the pH sensor, conductivity sensor, and temperature sensor equipped in the device are connected to the electrolysis regulator, which can monitor the state of the electrolyte in real time, providing a basis for the operator to accurately control the electrolysis process and ensuring the stability and reliability of the polishing quality. Generally speaking, this electrolysis device performs excellently in terms of operation convenience, optimization of polishing and cleaning effects, and process monitoring and control, providing strong support for efficient and high-quality electrolysis polishing and cleaning operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below.

[0017] The drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0018] In the drawings: Figure 1It is the axonometric structure schematic diagram of the present invention; Figure 2 It is the present invention Figure 1 The axonometric structure schematic diagram after rotation; Figure 3 It is the left view structure schematic diagram of the present invention; Figure 4 It is the present invention Figure 3 The enlarged structure schematic diagram at position A of the present invention; Figure 5 It is the present invention Figure 3 The enlarged structure schematic diagram at position B of the present invention; Figure 6 It is the axonometric structure schematic diagram of the present invention after partial sectioning; Figure 7 It is the present invention Figure 6 The enlarged structure schematic diagram at position C of the present invention; Figure 8 It is the axonometric structure schematic diagram of the electrolysis assembly of the present invention; Reference numerals: 1. Electrolytic cell; 101. Partition board; 102. Electrolysis regulator; 2. Adjustment assembly; 201. Guide frame; 202. Mounting frame; 203. Connecting block; 204. First motor; 205. First threaded rod; 206. Sliding frame; 207. Second motor; 208. Second threaded rod; 3. Electrolysis assembly; 301. Negative terminal; 302. Coil; 303. Rotating shaft; 304. Helical spring; 305. Ceramic connecting block; 306. Metal hook; 307. Protrusion; 308. Gear; 309. Tooth row; 310. Spring rod; 311. Force-bearing rod; 312. Contact seat; 4. Auxiliary assembly; 401. Mounting arm; 402. Auxiliary plate. Detailed implementation manners

[0019] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment 1: Please refer to Figures 1 to 8As shown in the figure, the present invention provides an electrolytic polishing device for a magnesium alloy vascular stent, comprising: an electrolytic cell 1; a partition 101 is fixedly arranged at the middle position inside the electrolytic cell 1, and the electrolytic cell 1 is divided into two regions by the partition 101. The left region is filled with an electrolyte solution, and the right region is filled with a cleaning solution. Two guiding frames 201 are fixedly arranged on the top surface of the electrolytic cell 1 through screws, and a mounting frame 202 with a concave structure slides on the two guiding frames 201; a connecting block 203 is fixedly arranged at the right position on the top surface of the electrolytic cell 1, a first motor 204 is fixedly arranged on the right end surface of the mounting frame 202, and a first threaded rod 205 is fixedly arranged on the output shaft of the first motor 204. The first threaded rod 205 is threadedly connected to the connecting block 203.

[0021] Among them, a sliding frame 206 slides on the mounting frame 202. A second motor 207 is fixedly arranged on the top surface of the sliding frame 206, and a second threaded rod 208 is fixedly arranged on the output shaft of the second motor 207. The second threaded rod 208 is threadedly connected to the mounting frame 202. When adjusting the left and right positions of the magnesium alloy vascular stent, just drive the first motor 204 to rotate. The first motor 204 drives the first threaded rod 205 to rotate. Under the threaded drive of the first threaded rod 205, the left and right adjustment of the mounting frame 202 can be realized, and at this time, the left and right adjustment of the magnesium alloy vascular stent is also realized. When adjusting the up and down positions of the magnesium alloy vascular stent, just drive the second motor 207 to rotate. The second motor 207 drives the second threaded rod 208 to rotate. Under the threaded drive of the second threaded rod 208, the height adjustment of the sliding frame 206 can be realized, and the height adjustment of the magnesium alloy vascular stent is also realized.

[0022] Among them, the guiding frames 201, the mounting frame 202, the connecting block 203, the first motor 204, the first threaded rod 205, the sliding frame 206, the second motor 207 and the second threaded rod 208 together form an adjustment assembly 2.

[0023] Among them, an electrolysis assembly 3 is installed on the electrolytic cell 1. The electrolysis assembly 3 includes a negative electrode terminal 301, a coil 302, a rotating shaft 303, a spiral spring 304, a ceramic connecting block 305, a metal hook 306, a protrusion 307, a gear 308, a tooth row 309, a spring rod 310, a force-bearing rod 311 and a contact seat 312. The negative electrode terminal 301 is fixedly arranged on the electrolytic cell 1, and one end of the negative electrode terminal 301 at the lower part is welded with the coil 302. The effect of the negative electrode can be improved through the coil 302. The coil 302 is located in the left region of the electrolytic cell 1, and the negative electrode terminal 301 is electrically connected to the negative electrode of the pulse power supply, reducing the hydrogen evolution reaction.

[0024] Among them, four rotating shafts 303 are rotatably arranged on the sliding frame 206 in a linear array, and a gear 308 is welded at a point above each rotating shaft 303. A tooth row 309 slides back and forth on the sliding frame 206. The tooth row 309 meshes with the four gears 308. A spring rod 310 is fixed on the sliding frame 206, and the protruding end of the spring rod 310 is fixed on the tooth row 309. A force-bearing rod 311 is welded on the front end face of the tooth row 309. One end on the front side of the force-bearing rod 311 contacts the front end face of the inner wall of the mounting frame 202. Protrusions 307 are welded on the front end face of the inner wall of the mounting frame 202 in a linear array. The protrusions 307 are semi-cylindrical structures. When the sliding frame 206 moves downward, the force-bearing rod 311 is in a continuous elastic contact state with the protrusions 307. Under the extrusion of the protrusions 307, the tooth row 309 moves back and forth. During use, when the sliding frame 206 moves downward, the force-bearing rod 311 moves back and forth under the extrusion of the protrusions 307. Through the meshing transmission between the tooth row 309 and the gears 308, the reciprocating rotation of the rotating shaft 303 can be realized, that is, the rotation of the magnesium alloy vascular stent is realized, and the contact effect between the magnesium alloy vascular stent and the electroplating liquid is improved.

[0025] Among them, a helical spring 304 is welded at the lower end of each rotating shaft 303. A ceramic connecting block 305 is fixed at the lower end of each helical spring 304. A metal hook 306 is fixed on the bottom end face of each ceramic connecting block 305. The metal hook 306 is used to hang the magnesium alloy vascular stent. When the sliding frame 206 moves downward, vibration can be generated through the continuous elastic clamping between the force-bearing rod 311 and the protrusions 307. Under the action of the vibration, the helical spring 304 reciprocates and contracts. At this time, the magnesium alloy vascular stent moves up and down in the electroplating liquid, and the contact effect between the magnesium alloy vascular stent and the electroplating liquid is improved again.

[0026] Among them, the metal hook 306 is formed by bending a cylindrical rod. During use, the contact area between the metal hook 306 and the magnesium alloy vascular stent is small, and sufficient polishing of the magnesium alloy vascular stent can be realized.

[0027] Among them, a contact seat 312 made of metal is fixed on the bottom end face of the sliding frame 206. The contact seat 312 is of a concave structure. The four metal hooks 306 all slide on the contact seat 312. The contact seat 312 is electrically connected to the anode of the pulse power supply to reduce the hydrogen evolution reaction. During use, the electrical connection between the anode and the four magnesium alloy vascular stents is realized.

[0028] Among them, an auxiliary component 4 is installed on the sliding carriage 206. The auxiliary component 4 includes a mounting arm 401 and an auxiliary plate 402. Four mounting arms 401 are welded to the bottom end surface of the sliding carriage 206, and an auxiliary plate 402 is welded to the bottom end surface of each mounting arm 401. The auxiliary plate 402 is of a circular plate structure and is located directly below the metal hook 306. Circular holes are arranged in an annular array on the auxiliary plate 402. When the auxiliary plate 402 moves downward with the sliding carriage 206, a jet-like state appears at the circular holes on the auxiliary plate 402. After the jet at the circular holes contacts the magnesium alloy vascular stent, it can jack up the space between blood vessels. At this time, polishing of the contact position between the magnesium alloy vascular stent and the metal hook 306 is achieved, eliminating the polishing dead angle, and the mixing of the electroplating liquid can be realized under the action of the jet, improving the electroplating effect of the magnesium alloy vascular stent.

[0029] Embodiment 2, on the basis of Embodiment 1, as Figures 1 - 8 shown, a bracket is fixed to the left end surface of the electrolytic cell 1, and an electrolysis regulator 102 is placed on the bracket. A pH sensor, a conductivity sensor, and a temperature sensor are installed in the electrolytic cell 1, and the pH sensor, the conductivity sensor, and the temperature sensor are all electrically connected to the electrolysis regulator 102. During use, by observing the values on the electrolysis regulator 102, the pH value, the conductivity value, and the temperature value in the electrolyte can be monitored in real time.

[0030] First, hang the magnesium alloy vascular stent on the metal hook 306 and connect the power supplies of the anode and cathode, and just drive the first motor 204 to rotate. The first motor 204 drives the first threaded rod 205 to rotate, and under the thread drive of the first threaded rod 205, the left - right adjustment of the mounting frame 202 can be realized. Then, when the magnesium alloy vascular stent is adjusted above the electrolyte solution, just drive the second motor 207 to rotate. The second motor 207 drives the second threaded rod 208 to rotate. Under the thread drive of the second threaded rod 208, the sliding frame 206 moves downward, and at this time the magnesium alloy vascular stent is immersed in the electrolyte solution. At the same time, when the sliding frame 206 moves downward, the force - receiving rod 311 reciprocates back and forth under the extrusion of the protrusion 307. Through the meshing transmission of the tooth row 309 and the gear 308, the reciprocating rotation of the rotating shaft 303 can be realized, that is, the reciprocating rotation of the magnesium alloy vascular stent in the electroplating liquid is realized, improving the contact effect between the magnesium alloy vascular stent and the electroplating liquid. At the same time, when the sliding frame 206 moves downward, vibration can be generated through the continuous elastic clamping of the force - receiving rod 311 and the protrusion 307. Under the action of the vibration, the helical spring 304 reciprocates telescopically, and at this time the magnesium alloy vascular stent moves up and down reciprocally in the electroplating liquid. At the same time, when the auxiliary plate 402 moves downward following the sliding frame 206, a jet - like state appears at the circular hole on the auxiliary plate 402. After the jet at the circular hole contacts the magnesium alloy vascular stent, it can jack up between the blood vessels. At this time, polishing of the contact position between the magnesium alloy vascular stent and the metal hook 306 is realized, and the mixing of the electroplating liquid can be realized under the action of the jet. During cleaning, drive the first motor 204 to rotate to adjust the magnesium alloy vascular stent to a position above the cleaning liquid, and drive the second motor 207 to rotate. Under the thread drive of the second threaded rod 208, the magnesium alloy vascular stent enters the cleaning liquid, realizing cleaning. During cleaning, the rotation, up - and - down reciprocating movement, and jet cleaning of the magnesium alloy vascular stent can still be realized.

Claims

1. Electrolytic polishing device for magnesium alloy vascular stent, comprising an electrolytic cell (1); a partition plate (101) is fixed at the middle position inside the electrolytic cell (1), and the partition plate (101) divides the electrolytic cell (1) into two regions. The left region is filled with electrolyte solution, and the right region is filled with cleaning solution; it is characterized in that, On the top surface of the electrolytic cell (1), two guiding frames (201) are fixed by screws, and a mounting frame (202) with a concave structure slides on the two guiding frames (201); a connecting block (203) is fixed at the right position on the top surface of the electrolytic cell (1), a first motor (204) is fixed to the right end face of the mounting frame (202), a first threaded rod (205) is fixed to the output shaft of the first motor (204), and the first threaded rod (205) is threadedly connected to the connecting block (203); a sliding frame (206) slides on the mounting frame (202), and the mounting frame (202), guiding frames (201), connecting block (203), first motor (204), first threaded rod (205), sliding frame (206), second motor (207) and second threaded rod (208) together form an adjustment assembly (2).

2. The electrolytic polishing device for a magnesium alloy vascular stent according to claim 1, characterized in that, A second motor (207) is fixed to the top surface of the sliding frame (206), a second threaded rod (208) is fixed to the output shaft of the second motor (207), and the second threaded rod (208) is threadedly connected to the mounting frame (202).

3. The electrolytic polishing device for a magnesium alloy vascular stent according to claim 2, characterized in that, An electrolysis assembly (3) is installed on the electrolytic cell (1), and the electrolysis assembly (3) includes a negative terminal (301), a coil (302), a rotating shaft (303), a helical spring (304), a ceramic connecting block (305), a metal hook (306), a protrusion (307), a gear (308), a tooth row (309), a spring rod (310), a force-bearing rod (311) and a contact seat (312). The negative terminal (301) is fixed on the electrolytic cell (1), one end of the negative terminal (301) at the lower part is welded with the coil (302), the coil (302) is located in the left area of the electrolytic cell (1), and the negative terminal (301) is electrically connected to the negative pole of the pulse power supply.

4. The electrolytic polishing device for magnesium alloy vascular stents according to claim 3, characterized in that, Four rotating shafts (303) are rotatably arranged in a linear array on the sliding frame (206), and a gear (308) is welded above each rotating shaft (303); a tooth row (309) slides back and forth on the sliding frame (206), the tooth row (309) meshes with the four gears (308), a spring rod (310) is fixed on the sliding frame (206), the extending end of the spring rod (310) is fixed to the tooth row (309), a force-bearing rod (311) is welded to the front end face of the tooth row (309), and the front end of the force-bearing rod (311) is in contact with the front end face of the inner wall of the mounting frame (202).

5. The electrolytic polishing device for a magnesium alloy vascular stent according to claim 4, wherein, Protrusions (307) are welded in a linear array on the front end face of the inner wall of the mounting frame (202), and the protrusions (307) are semi-cylindrical structures. When the sliding frame (206) moves downward, the force-bearing rod (311) is in a continuous elastic contact state with the protrusions (307), and under the extrusion of the protrusions (307), the tooth row (309) moves back and forth.

6. The electrolytic polishing device for a magnesium alloy vascular stent according to claim 5, wherein, A helical spring (304) is welded to the lower end of each of the rotating shafts (303). A ceramic connecting block (305) is fixed to the lower end of each helical spring (304). A metal hook (306) is fixed to the bottom end surface of each ceramic connecting block (305). The metal hook (306) is used for hanging a magnesium alloy vascular stent.

7. The electrolytic polishing device for a magnesium alloy vascular stent according to claim 6, wherein, The metal hook (306) is formed by bending a cylindrical rod.

8. The electrolytic polishing device for magnesium alloy vascular stents according to claim 7, characterized in that, A contact seat (312) made of metal is fixed to the bottom end surface of the sliding frame (206). The contact seat (312) is of a concave structure. The four metal hooks (306) are all slidably arranged on the contact seat (312). The contact seat (312) is electrically connected to the anode of the pulse power supply.

9. The electrolytic polishing device for a magnesium alloy vascular stent according to claim 8, wherein An auxiliary assembly (4) is installed on the sliding frame (206). The auxiliary assembly (4) includes a mounting arm (401) and an auxiliary plate (402). Four mounting arms (401) are welded to the bottom end surface of the sliding frame (206). An auxiliary plate (402) is welded to the bottom end surface of each mounting arm (401). The auxiliary plate (402) is of a circular plate-like structure. The auxiliary plate (402) is located directly below the metal hook (306). Circular holes are formed in the auxiliary plate (402) in an annular array.

10. The electrolytic polishing device for a magnesium alloy vascular stent according to claim 9, wherein, A bracket is fixed to the left end surface of the electrolytic cell (1). An electrolysis regulator (102) is placed on the bracket. A pH sensor, a conductivity sensor, and a temperature sensor are installed in the electrolytic cell (1). The pH sensor, the conductivity sensor, and the temperature sensor are all electrically connected to the electrolysis regulator (102).

Citation Information

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