High-precision polishing device for nickel-titanium alloy wire and stainless steel medical composite guide wire

Abstract

The invention discloses a high-precision polishing device for a nickel-titanium alloy wire and a stainless steel medical composite guide wire, and particularly relates to the technical field of medical instruments, the high-precision polishing device comprises a polishing chamber arranged in the middle of a base plate, and feeding bins are arranged on the two sides of the bottom of the polishing chamber in a communicating mode. Through the third traction unit working in the direction opposite to the second traction unit, the nickel-titanium alloy wire and the stainless steel guide wire move towards the two sides, the nickel-titanium alloy wire and the stainless steel guide wire are kept in the straightened state, and then the two ends of the nickel-titanium alloy wire and the two ends of the stainless steel guide wire are clamped through the second traction unit; then, the corresponding friction plates are driven to make contact with the nickel-titanium alloy wires and the stainless steel guide wires on the corresponding sides through movement of the first rack plate and the second rack plate on the different sides, so that the nickel-titanium alloy wires and the stainless steel guide wires turn over and rotate in the machining groove, it is ensured that the positions of the nickel-titanium alloy wires and the stainless steel guide wires are changed in the polishing process, and repeated and intermittent polishing of the polishing positions is avoided; excessive abrasion and heat influence in the polishing process are reduced, fine polishing is achieved, and the fineness required by machining is met.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and specifically to a high-precision polishing device for nickel-titanium alloy wire and stainless steel medical composite guide wire. Background Art

[0002] Nickel-titanium alloy wire and stainless steel guide wire are usually used to manufacture medical devices (such as catheters, stents, guide wires, etc.). The surface smoothness and processing quality of these devices directly affect their biocompatibility, mechanical properties and service life. The connection between nickel-titanium alloy wire and stainless steel guide wire needs to be welded, and there is a weld seam after welding, that is, the surface is not smooth and needs to be polished.

[0003] When using the conventional polishing equipment to polish the nickel-titanium alloy wire and stainless steel guide wire in blood vessels, the adaptability is not high, and it is difficult to polish finely, and the required fineness cannot be achieved.

[0004] The existing polishing method uses laser polishing to locally remove materials, but its high temperature may also affect the surface properties of the materials. Especially for temperature-sensitive materials such as nickel-titanium alloy, it may cause loss of shape memory effect. Summary of the Invention

[0005] The purpose of the present invention is to provide a high-precision polishing device for nickel-titanium alloy wire and stainless steel medical composite guide wire to solve the problems mentioned in the above background art.

[0006] The main technical problem to be solved by the present invention is:

[0007] The existing polishing uses laser polishing to locally remove materials, but its high temperature may also affect the surface properties of the materials. Especially for temperature-sensitive materials such as nickel-titanium alloy, it may cause loss of shape memory effect.

[0008] The present invention can be realized by the following technical solutions:

[0009] A high-precision polishing device for nickel-titanium alloy wire and stainless steel medical composite guide wire, including a polishing chamber provided in the middle of a substrate. Both sides of the bottom of the polishing chamber are communicated with a feeding bin for several nickel-titanium alloy wires and stainless steel guide wires to enter. The surface of the feeding bin is provided with several feeding channels, and the inside of the feeding bin is provided with a wiping assembly for cleaning several nickel-titanium alloy wires and stainless steel guide wires. One side of the inside of the polishing chamber adjacent to the corresponding feeding bin is provided with a traction unit one, and in the middle of the inner cavity of the polishing chamber and on the top surface of the substrate is provided a base. The upper surface of the base is provided with a plurality of processing grooves for positioning and placing nickel-titanium alloy wires and stainless steel guide wires, and the edge of the upper surface of the base is provided with a traction unit two for driving the nickel-titanium alloy wires and stainless steel guide wires entering from the corresponding feeding bin to move. In the middle of the inner cavity of the polishing chamber and above the base is provided a grinding assembly for polishing nickel-titanium alloy wires and stainless steel guide wires;

[0010] Near the middle of the surface of the base, there is a third traction unit whose rotation direction is opposite to that of the second traction unit and which keeps the nickel-titanium alloy wire and the stainless-steel guide wire in a straightened state. A conveying restriction assembly for conveying the nickel-titanium alloy wire and the stainless-steel guide wire is provided between the second traction unit and the first traction unit on the corresponding side. A friction rotation assembly for driving two adjacent nickel-titanium alloy wires and stainless-steel guide wires to rotate simultaneously is provided between the second traction unit and the third traction unit;

[0011] The friction rotation assembly includes a first rack plate and a second rack plate. Friction plates are movably installed on the lower surface of the first rack plate and the upper surface of the second rack plate. The friction plates are in frictional contact with the nickel-titanium alloy wire and the stainless-steel guide wire, so that the nickel-titanium alloy wire and the stainless-steel guide wire are in a straightened state and rotating, and the welding joint of the straightened and rotating nickel-titanium alloy wire and stainless-steel guide wire is polished by a polishing assembly.

[0012] A further technical improvement of the present invention lies in that: the friction rotation assembly further includes a gear provided between two adjacent nickel-titanium alloy wires and stainless-steel guide wires. The gear is meshed with the first rack plate and the second rack plate. An installation seat is installed on the top surface of the first rack plate. Above the installation seat, there is a cross plate installed on the inner wall surface of the polishing chamber. The cross plate is slidably arranged with the installation seat;

[0013] The second rack plate is embedded and slidably installed inside the base and communicates with the bottom surface of a processing groove.

[0014] A further technical improvement of the present invention lies in that: the surfaces of the first rack plate and the second rack plate are provided with limiting cavities slidably connected to the corresponding friction plates, and cylinders for pushing the friction plates to move are provided on the surfaces of the first rack plate and the second rack plate.

[0015] A further technical improvement of the present invention lies in that: a liquid outlet channel for the circulation of coolant is provided in the middle of the base.

[0016] A further technical improvement of the present invention lies in that: the polishing assembly includes a grinding wheel for counterclockwise polishing of the welding joint of the nickel-titanium alloy wire and the stainless-steel guide wire. The shaft end of the grinding wheel is connected to an installation frame. A fitting cushion block in contact with the outer surface of the nickel-titanium alloy wire and the stainless-steel guide wire is provided on the lower end surface of the installation frame.

[0017] A further technical improvement of the present invention lies in that: a cleaning unit is provided on the surface of the installation frame. The cleaning unit includes a first fitting scraping plate and a second fitting scraping plate that are fitted with the grinding wheel. A material dropping groove two is provided at the bottom of the second fitting scraping plate. A driving frame is installed inside the material dropping groove two. A magnetically driven roller that rotates clockwise is rotatably installed on the top of the driving frame. A material dropping groove one is formed between the driving frame and the material dropping groove two. Two waste chip outlets communicating with the corresponding material dropping groove two and the material dropping groove one are provided on the outer side of the bottom of the second fitting scraping plate.

[0018] A further technical improvement of the present invention lies in that: the conveying limiting assembly includes an electric push rod vertically installed inside the polishing chamber. A fixed frame is installed at the pushing end of the electric push rod, and a plurality of auxiliary wheels for conveying nickel-titanium alloy wires and stainless steel guide wires are installed on the surface of the fixed frame;

[0019] During polishing, the auxiliary wheel on the side close to the corresponding traction unit two abuts against the end face of the corresponding nickel-titanium alloy wire or stainless steel guide wire.

[0020] A further technical improvement of the present invention lies in that: the wiping assembly includes a convex plate fixedly arranged on the inner wall surface of the feeding bin. A fitting arc plate is slidably arranged in the concave cavity of the convex plate, and an elastic wiping sponge is embedded on the inner wall surface of the fitting arc plate. Both end faces of the wiping sponge are provided with inwardly inclined arc expanding parts.

[0021] A further technical improvement of the present invention lies in that: an elastic member is fixed on the outer side surface of the fitting arc plate, and the end of the elastic member is fixed to the concave cavity of the convex plate.

[0022] A further technical improvement of the present invention lies in that: a chip storage box body is slidably arranged at the bottom of the inner cavity of the feeding bin and below the fitting arc plate. The inner cavity length of the chip storage box body is greater than the length of the fitting arc plate.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. Through the traction unit three working in the opposite direction to the traction unit two, the nickel-titanium alloy wire and the stainless steel guide wire move to both sides, keeping the nickel-titanium alloy wire and the stainless steel guide wire in a straightened state. Then, the two ends of the nickel-titanium alloy wire and the stainless steel guide wire are clamped by the traction unit two. Then, through the movement of the first rack plate and the second rack plate on different sides, the corresponding friction plates are driven to contact the nickel-titanium alloy wire and the stainless steel guide wire on the corresponding side, so that they rotate and turn in the processing groove, ensuring that the positions of the nickel-titanium alloy wire and the stainless steel guide wire are changed during polishing, avoiding repeated polishing positions, performing intermittent grinding, reducing excessive wear and thermal influence during polishing, and performing fine polishing to meet the fineness requirements of processing;

[0025] 2. The connecting part of the nickel-titanium alloy wire and the stainless steel guide wire with adjusted positions is intermittently polished by the grinding wheel to reduce heat. Due to the contact between the first fitting scraper and the second fitting scraper and the grinding wheel, the impurities on the grinding wheel are removed, ensuring that the surface of the grinding wheel remains clean and uniform each time during polishing, maintaining its best polishing performance, improving the polishing efficiency, and realizing the layered collection of stainless steel particles and nickel-titanium alloy particles through the clockwise rotation of the magnetic roller and the friction with the driving frame;

[0026] 3. Before the nitinol wire and the stainless steel guide wire enter polishing, the wiping assembly first cleans their surfaces once. After polishing, through the frictional contact between the wiping sponge in the fitting arc plate and the surfaces of the nitinol wire and the stainless steel guide wire, the coolant is wiped clean. Since the diameters of the nitinol wire and the stainless steel guide wire are adapted to the wiping sponge, when the residual nitinol particles and stainless steel particles pass through the wiping sponge, small particles that may adhere to the surfaces of the nitinol wire and the stainless steel guide wire are removed and fall into the chip storage box through the arc expansion part. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the accompanying drawings.

[0028] Figure 1 is the external structure schematic diagram of the present invention;

[0029] Figure 2 is the internal structure schematic diagram of the polishing chamber of the present invention;

[0030] Figure 3 is for the present invention Figure 1 partial enlarged view at A in;

[0031] Figure 4 is the installation structure schematic diagram of the gear and the first rack plate of the present invention;

[0032] Figure 5 is the installation structure schematic diagram of the grinding wheel and the second fitting scraping plate of the present invention;

[0033] Figure 6 is the installation structure schematic diagram of the fitting arc plate and the convex plate of the present invention;

[0034] Figure 7 is the three-dimensional structure schematic diagram of the fitting arc plate of the present invention.

[0035] In the figure: 1. Polishing chamber; 2. Feeding bin; 3. Chip storage box; 4. Feeding channel; 5. Fitting arc plate; 6. First traction unit; 7. Electric push rod; 8. Fixed frame; 9. Auxiliary wheel; 10. Mounting frame; 11. Grinding wheel; 12. Liquid outlet channel; 13. Base; 14. Processing groove; 15. Gear; 16. Cross plate; 17. Mounting seat; 18. First rack plate; 19. Restriction cavity; 20. Friction plate; 21. Cylinder; 22. Second rack plate; 23. Second traction unit; 24. Third traction unit; 25. Fitting cushion block; 26. Wiping sponge; 27. Elastic member; 28. Convex plate; 29. First fitting scraping plate; 30. Second fitting scraping plate; 31. Driving frame; 32. Magnetic roller; 33. Arc expansion part; 34. First blanking groove; 35. Second blanking groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] To further elaborate on the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features, and effects of the present invention as follows.

[0037] Please refer to Figures 1 - 7As shown in the figure, the present invention provides a high-precision polishing device for nickel-titanium alloy wires and stainless steel medical composite guide wires, which includes a polishing chamber 1 provided in the middle of a substrate. On both sides of the bottom of the polishing chamber 1, there are communicated with feeding bins 2 for several nickel-titanium alloy wires and stainless steel guide wires to enter. On the surface of the feeding bin 2, there are several feeding channels 4, and inside the feeding bin 2, there is a wiping assembly for cleaning several nickel-titanium alloy wires and stainless steel guide wires. On one side of the polishing chamber 1 adjacent to the corresponding feeding bin 2, there is a traction unit one 6. In the middle of the inner cavity of the polishing chamber 1 and on the top surface of the substrate, there is a base 13. On the upper surface of the base 13, there are multiple processing grooves 14 for positioning and placing nickel-titanium alloy wires and stainless steel guide wires. On the edge of the upper surface of the base 13, there is a traction unit two 23 for driving the nickel-titanium alloy wires and stainless steel guide wires entering from the corresponding feeding bin 2 to move. In the middle of the inner cavity of the polishing chamber 1 and above the base 13, there is a grinding assembly for polishing nickel-titanium alloy wires and stainless steel guide wires. Near the middle of the surface of the base 13, there is a traction unit three 24 that rotates in the opposite direction to the traction unit two 23 and keeps the nickel-titanium alloy wires and stainless steel guide wires in a straightened state. Between the traction unit two 23 and the corresponding traction unit one 6, there is a conveying limit assembly for conveying nickel-titanium alloy wires and stainless steel guide wires. Between the traction unit two 23 and the traction unit three 24, there is a friction rotation assembly for driving two adjacent nickel-titanium alloy wires and stainless steel guide wires to rotate simultaneously;The friction rotation assembly includes a first rack plate 18 and a second rack plate 22. Friction plates 20 are movably installed on the lower surface of the first rack plate 18 and the upper surface of the second rack plate 22. The friction plates 20 are in frictional contact with the nitinol wire and the stainless steel wire, causing the nitinol wire and the stainless steel wire to be straightened and rotated. The polishing assembly polishes the welded joint of the straightened and rotated nitinol wire and stainless steel wire. In the working state, the nitinol wire and the stainless steel wire enter through the feeding channel 4 at the upper feeding bin 2. After passing through the wiping assembly, their ends reach the first traction unit 6. The first traction unit 6 tractions the nitinol wire and the stainless steel wire to advance and assist in conveying. During this process, the nitinol wire and the stainless steel wire enter the processing groove 14 on the top surface of the base 13. Then, the ends of the conveyed nitinol wire and stainless steel wire are blocked by another conveying limiting assembly to complete their positioning. Immediately afterwards, the third traction unit 24 that works in the opposite direction to the second traction unit 23 is used to move the nitinol wire and the stainless steel wire to both sides, maintaining the straightened state of the nitinol wire and the stainless steel wire. Then, the second traction unit 23 clamps both ends of the nitinol wire and the stainless steel wire. Then, through the movement of the first rack plate 18 and the second rack plate 22 on different sides, the corresponding friction plates 20 are driven to contact the nitinol wire and the stainless steel wire on the corresponding side, causing them to flip and rotate in the processing groove 14. Since they rotate in the processing groove 14, the position of the nitinol wire and the stainless steel wire during flipping is prevented from shifting, ensuring that the position of the nitinol wire and the stainless steel wire is changed during polishing, avoiding repeated polishing positions, performing intermittent polishing, reducing excessive wear and thermal influence during polishing. During polishing, the use of coolant is coordinated to achieve a cooling effect. After polishing is completed, they leave through the entering position, and continuous feeding and polishing are carried out by another upper feeding bin 2.;

[0038] Refer to Figure 4 As shown, the friction rotation assembly further includes a gear 15 provided between two adjacent nitinol wires and stainless steel wires. The gear 15 is meshed with the first rack plate 18 and the second rack plate 22. A mounting seat 17 is installed on the top surface of the first rack plate 18. Above the mounting seat 17, there is a cross plate 16 installed on the inner wall surface of the polishing chamber 1. The cross plate 16 is slidably arranged with the mounting seat 17;

[0039] The second rack plate 22 is embedded and slidably installed inside the base 13 and communicates with the bottom surface of a processing groove 14;

[0040] The surfaces of the first rack plate 18 and the second rack plate 22 are provided with a limiting cavity 19 that is slidably connected to the corresponding friction plate 20, and the surfaces of the first rack plate 18 and the second rack plate 22 are provided with a cylinder 21 for pushing the friction plate 20 to move. The first rack plate 18 and the second rack plate 22 are driven to move simultaneously by the gear 15. At this time, the friction plate 20 contacts the nitinol wire and the stainless steel wire, and pushes the nitinol wire and the stainless steel wire to flip and rotate. After the position is adjusted, the gear 15 rotates back to its original position, and the friction plate 20 is pushed back into the limiting cavity 19 by the corresponding cylinder 21, avoiding the contact between the friction plate 20 and the nitinol wire and the stainless steel wire when the gear 15 resets, which may cause the position of the nitinol wire and the stainless steel wire to change. The first rack plate 18 and the second rack plate 22 reach the initial position, and then the gear 15 repeats the flipping and rotating to complete the flipping of the next position of the nitinol wire and the stainless steel wire until the flipping of the entire surface of the nitinol wire and the stainless steel wire is completed.

[0041] It should be noted that when controlling the flipping position of the nitinol wire and the stainless steel wire, the second traction unit 23 and the third traction unit 24 adaptively control the clamping force and traction force at the ends of the nitinol wire and the stainless steel wire. The system adjusts the clamping force and traction force according to the feedback data to ensure that their positions change.

[0042] Refer to Figure 2 As shown, a liquid outlet channel 12 for the circulation of the coolant is provided in the middle of the base 13, and the cooled coolant is centrally collected through the liquid outlet channel 12.

[0043] Refer to Figure 3 and Figure 5 As shown, the grinding assembly includes a grinding wheel 11 that polishes the welding joint of the nitinol wire and the stainless steel wire counterclockwise. The shaft end of the grinding wheel 11 is connected to a mounting bracket 10, and a fitting pad 25 that contacts the outer surface of the nitinol wire and the stainless steel wire is provided on the lower end surface of the mounting bracket 10;

[0044] The surface of the mounting frame 10 is provided with a cleaning unit. The cleaning unit includes a first fitting scraper 29 and a second fitting scraper 30 that are fitted to the grinding wheel 11. A second material dropping groove 35 is provided at the bottom of the second fitting scraper 30. A driving frame 31 is installed inside the second material dropping groove 35. A magnetic roller 32 that rotates clockwise is rotatably installed at the top of the driving frame 31. A first material dropping groove 34 is formed between the driving frame 31 and the second material dropping groove 35. Two waste chip outlets that communicate with the corresponding second material dropping groove 35 and the first material dropping groove 34 are provided on the outer side of the bottom of the second fitting scraper 30. During polishing, the grinding wheel 11 intermittently grinds the joint of the nickel-titanium alloy wire and the stainless steel guide wire with adjusted positions to reduce its heat. At the same time, due to the contact between the first fitting scraper 29 and the second fitting scraper 30 and the grinding wheel 11, the impurities on the grinding wheel 11 are removed, ensuring that the surface of the grinding wheel 11 remains clean and uniform each time during polishing, maintaining its best polishing performance, and improving the polishing efficiency. The nickel-titanium alloy particles and stainless steel particles (mixed abrasive particles) attached to the grinding wheel 11 are scraped into the second material dropping groove 35. Due to the clockwise rotation of the magnetic roller 32, the stainless steel particles can be continuously magnetically adsorbed, and due to the friction between the top of the driving frame 31 and the magnetic roller 32, the stainless steel particles fall into the upper first material dropping groove 34, while the nickel-titanium alloy particles fall into the second material dropping groove 35, realizing layered collection for convenient subsequent use.

[0045] Refer to Figure 2 As shown, the conveying limiting assembly includes an electric push rod 7 vertically installed inside the polishing chamber 1. A fixed frame 8 is installed at the pushing end of the electric push rod 7. A plurality of auxiliary wheels 9 for conveying the nickel-titanium alloy wire and the stainless steel guide wire are installed on the surface of the fixed frame 8.

[0046] During polishing, the auxiliary wheel 9 close to one side of the corresponding second traction unit 23 abuts against the end face of the corresponding nickel-titanium alloy wire or stainless steel guide wire. Initially, the auxiliary wheel 9 is at the same height as the first traction unit 6 and the second traction unit 23. The nickel-titanium alloy wire and the stainless steel guide wire reach the second traction unit 23 through the auxiliary wheel 9, and the nickel-titanium alloy wire and the stainless steel guide wire are positioned and conveyed into the processing groove 14. The auxiliary wheel 9 in another conveying limiting assembly limits the ends of the nickel-titanium alloy wire and the stainless steel guide wire. Then, by rotating the third traction unit 24 in the opposite direction, the middle polishing positions of the nickel-titanium alloy wire and the stainless steel guide wire are straightened, and then the second traction unit 23 is used to fix the ends of the nickel-titanium alloy wire and the stainless steel guide wire, facilitating subsequent polishing of the nickel-titanium alloy wire and the stainless steel guide wire.

[0047] Refer to Figure 6 and Figure 7 As shown, the wiping assembly includes a convex plate 28 fixedly arranged on the inner wall surface of the feeding bin 2. A fitting arc plate 5 is slidably arranged in the concave cavity of the convex plate 28. An elastic wiping sponge 26 is embedded on the inner wall surface of the fitting arc plate 5. Arc expanding parts 33 that incline inwards are provided on both end faces of the wiping sponge 26.

[0048] An elastic member 27 is fixed to the outer side surface of the fitting arc plate 5, and the end of the elastic member 27 is fixed to the concave cavity of the convex plate 28;

[0049] A chip storage box body 3 is slidably arranged at the bottom of the inner cavity of the feeding bin 2 and below the fitting arc plate 5. The inner cavity length of the chip storage box body 3 is greater than the length of the fitting arc plate 5. Before the nickel-titanium alloy wire and the stainless steel guide wire enter polishing, the wiping assembly first cleans their surfaces once. Then, after polishing is completed, the nickel-titanium alloy wire and the stainless steel guide wire enter into the two fitting arc plates 5, and through the frictional contact between the wiping sponge 26 in the fitting arc plate 5 and the surfaces of the nickel-titanium alloy wire and the stainless steel guide wire, the coolant is wiped clean. Since the diameters of the nickel-titanium alloy wire and the stainless steel guide wire are adapted to the wiping sponge 26, when the residual nickel-titanium alloy particles and stainless steel particles pass through the wiping sponge 26, small particles that may adhere to the surfaces of the nickel-titanium alloy wire and the stainless steel guide wire are removed, and they fall into the chip storage box body 3 through the arc expanding portion 33.

[0050] When the present invention is in use, through the traction unit three 24 that works in the opposite direction to the traction unit two 23, the nickel-titanium alloy wire and the stainless steel guide wire are moved to both sides, keeping the nickel-titanium alloy wire and the stainless steel guide wire in a straightened state. Then, the traction unit two 23 clamps the two ends of the nickel-titanium alloy wire and the stainless steel guide wire. Then, through the movement of the first rack plate 18 and the second rack plate 22 on different sides, the corresponding friction plates 20 are driven to contact the nickel-titanium alloy wire and the stainless steel guide wire on the corresponding side, causing them to turn and rotate in the processing groove 14, ensuring that the positions of the nickel-titanium alloy wire and the stainless steel guide wire are changed during polishing, avoiding repeated polishing positions, performing intermittent grinding, reducing excessive wear and heat influence during polishing, and performing fine polishing to meet the fineness requirements of processing;

[0051] The grinding wheel 11 intermittently polishes the connection part of the nickel-titanium alloy wire and the stainless steel guide wire with adjusted positions to reduce heat. Due to the contact between the first fitting scraping plate 29 and the second fitting scraping plate 30 and the grinding wheel 11, the impurities on the grinding wheel 11 are removed, ensuring that the surface of the grinding wheel 11 remains clean and uniform each time during polishing, maintaining its best polishing performance, improving the polishing efficiency, and realizing the stratified collection of stainless steel particles and nickel-titanium alloy particles through the clockwise rotation of the magnetic roller 32 and the friction with the driving frame 31;

[0052] Before the nickel-titanium alloy wire and the stainless steel guide wire enter polishing, the wiping assembly first cleans their surfaces once. After polishing is completed, through the frictional contact between the wiping sponge 26 in the fitting arc plate 5 and the surfaces of the nickel-titanium alloy wire and the stainless steel guide wire, the coolant is wiped clean. Since the diameters of the nickel-titanium alloy wire and the stainless steel guide wire are adapted to the wiping sponge 26, when the residual nickel-titanium alloy particles and stainless steel particles pass through the wiping sponge 26, small particles that may adhere to the surfaces of the nickel-titanium alloy wire and the stainless steel guide wire are removed, and they fall into the chip storage box body 3 through the arc expanding portion 33.

[0053] As described above, it is only the preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to form equivalent embodiments by using the above-disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A high-precision polishing device for nickel-titanium alloy wire and stainless steel medical composite guide wire, comprising a polishing chamber (1) arranged in the middle of a base plate, characterized in that: The bottom two sides of the polishing chamber (1) are connected to a loading bin (2) for a plurality of nickel-titanium alloy wires and stainless steel guide wires to enter, the surface of the loading bin (2) is provided with a plurality of feeding channels (4), and the interior of the loading bin (2) is provided with a wiping assembly for cleaning the plurality of nickel-titanium alloy wires and stainless steel guide wires, the interior of the polishing chamber (1) is provided with a traction unit (6) adjacent to a side of the corresponding loading bin (2), and a base (13) is provided in the middle of the inner cavity of the polishing chamber (1) and located on the top surface of the substrate, the upper surface of the base (13) is provided with a plurality of processing grooves (14) for positioning and placing the nickel-titanium alloy wires and stainless steel guide wires, and the upper surface edge of the base (13) is provided with a traction unit (23) for driving the nickel-titanium alloy wires and stainless steel guide wires entering from the corresponding loading bin (2) to move, and the inner cavity of the polishing chamber (1) and located in the middle above the base (13) is provided with a grinding assembly for polishing the nickel-titanium alloy wires and stainless steel guide wires; A traction unit 3 (24) is provided near the middle of the surface of the base (13), which rotates in the opposite direction to the traction unit 2 (23) and keeps the nickel-titanium alloy wire and the stainless steel guide wire in a straight state; a conveying limiting component for conveying the nickel-titanium alloy wire and the stainless steel guide wire is provided between the traction unit 2 (23) and the traction unit 1 (6) on the corresponding side; and a friction rotation component for driving two adjacent nickel-titanium alloy wires and the stainless steel guide wire to rotate simultaneously is provided between the traction unit 2 (23) and the traction unit 3 (24); The friction rotation component comprises a rack plate one (18) and a rack plate two (22), the lower surface of the rack plate one (18) and the upper surface of the rack plate two (22) are both movably mounted with a friction plate (20), the friction plate (20) is in frictional contact with the nickel-titanium alloy wire and the stainless steel guide wire, so that the nickel-titanium alloy wire and the stainless steel guide wire are in a straight rotation, and the polishing component polishes the welding part of the straight rotating nickel-titanium alloy wire and the stainless steel guide wire.

2. The high-precision polishing device for nickel-titanium alloy wire and stainless steel medical composite guide wire according to claim 1 is characterized in that: The friction rotation assembly also includes a gear (15) disposed between two adjacent nickel-titanium alloy wires and the stainless steel guide wire, the gear (15) being meshed with a rack plate 1 (18) and a rack plate 2 (22), a mounting seat (17) being mounted on the top surface of the rack plate 1 (18), a horizontal plate (16) being mounted on the inner wall surface of the polishing chamber (1) being disposed above the mounting seat (17), the horizontal plate (16) being slidably disposed with the mounting seat (17); The second rack plate (22) is embedded and slidably mounted inside the base (13) and communicates with the bottom surface of a processing groove (14).

3. The high-precision polishing device for nickel-titanium alloy wire and stainless steel medical composite guide wire according to claim 1, characterized in that: The surfaces of the rack plate 1 (18) and the rack plate 2 (22) are provided with a limiting cavity (19) slidably connected to the corresponding friction plate (20), and the surfaces of the rack plate 1 (18) and the rack plate 2 (22) are provided with a cylinder (21) for pushing the friction plate (20) to move.

4. The high-precision polishing device for nickel-titanium alloy wire and stainless steel medical composite guide wire according to claim 1, characterized in that: A liquid outlet channel (12) for the circulation of cooling liquid is provided in the middle of the base (13).

5. The high-precision polishing device for nickel-titanium alloy wire and stainless steel medical composite guide wire according to claim 1, characterized in that: The polishing assembly comprises a grinding wheel (11) for counterclockwise polishing of the welding point between the nickel-titanium alloy wire and the stainless steel guide wire, the axial end of the grinding wheel (11) is connected to a mounting frame (10), and the lower end surface of the mounting frame (10) is provided with a fitting pad (25) in contact with the outer surface of the nickel-titanium alloy wire and the stainless steel guide wire.

6. The high-precision polishing device for nickel-titanium alloy wire and stainless steel medical composite guide wire according to claim 5, characterized in that: A cleaning unit is provided on the surface of the mounting frame (10), and the cleaning unit comprises a first fitting scraper (29) and a second fitting scraper (30) which are fitted with the grinding wheel (11); a second material drop groove (35) is provided at the bottom of the second fitting scraper (30); a driving frame (31) is installed inside the second material drop groove (35); a magnetic roller (32) which rotates clockwise is rotatably installed on the top of the driving frame (31); a first material drop groove (34) is formed between the driving frame (31) and the second material drop groove (35); and two waste chip outlets which are in communication with the second material drop groove (35) and the first material drop groove (34) corresponding to the second material drop groove (35) and the first material drop groove (34) are provided on the outer side of the bottom of the second fitting scraper (30).

7. The high-precision polishing device for nickel-titanium alloy wire and stainless steel medical composite guide wire according to claim 1, characterized in that: The conveying limiting assembly comprises an electric push rod (7) vertically mounted inside the polishing chamber (1), a fixing frame (8) being mounted on the pushing end of the electric push rod (7), and a plurality of auxiliary wheels (9) for conveying nickel-titanium alloy wires and stainless steel guide wires being mounted on the surface of the fixing frame (8); During polishing, the auxiliary wheel (9) close to the corresponding side of the second traction unit (23) abuts against the end surface of the nickel-titanium alloy wire or stainless steel guide wire on the corresponding side.

8. The high-precision polishing device for nickel-titanium alloy wire and stainless steel medical composite guide wire according to claim 1, characterized in that: The wiping assembly comprises a convex plate (28) fixedly arranged on the inner wall surface of the loading bin (2), a fitting arc plate (5) slidingly arranged in the concave cavity of the convex plate (28), an elastic wiping sponge (26) embedded in the inner wall surface of the fitting arc plate (5), and both side end surfaces of the wiping sponge (26) are provided with an inwardly inclined expanding arc portion (33).

9. The high-precision polishing device for nickel-titanium alloy wire and stainless steel medical composite guide wire according to claim 8, characterized in that: An elastic member (27) is fixed to the outer side surface of the fitting arc plate (5), and the end of the elastic member (27) is fixed to the concave cavity of the convex plate (28).

10. The high-precision polishing device for nickel-titanium alloy wire and stainless steel medical composite guide wire according to claim 8, characterized in that: A chip storage box (3) is slidably provided at the bottom of the inner cavity of the upper material bin (2) and below the fitting arc plate (5); the inner cavity length of the chip storage box (3) is greater than the length of the fitting arc plate (5).

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