A continuous and efficient method for removing paint from enameled superconducting wire

Abstract

The present invention belongs to the technical field of superconducting wire processing, and discloses a continuous and efficient paint stripping method for enameled superconducting wires. The method includes loading the enameled superconducting wires into a wire pay-off device, and passing the enameled superconducting wires through a laser wire stripper to obtain enameled superconducting wires with a reduced surface paint film thickness or local damage; passing the enameled superconducting wires with a reduced surface paint film thickness or local damage through an ultrasonic immersion tank to obtain enameled superconducting wires with the surface paint film swollen and bulged and separated from the internal bare wire; passing the enameled superconducting wires with the surface paint film swollen and bulged and separated from the internal bare wire through a spray pool, an ultrasonic cleaning tank and a dryer in sequence to obtain a clean bare wire on the surface; horizontally passing the clean bare wire on the surface through a trimming die, and closely arranging the bare wire on a wire take-up wheel. The paint stripping efficiency of the enameled superconducting wires is higher. The whole wire is inspected, and the surface of the bare wire after paint stripping is smooth and free of damage, and the paint film falls off completely. The surface condition of the bare wire after paint stripping is basically the same as that of the bare wire before painting, meeting the requirements for reuse.

Description

Technical Field

[0001] The present invention relates to the technical field of superconducting wire processing, and particularly to a continuous and efficient paint stripping method for enameled superconducting wires. Background Art

[0002] Enameled superconducting wires are important components for winding low-cost nuclear magnetic resonance (MRI) magnets. With the increasing demand in the MRI market, the demand for enameled superconducting wires has also increased accordingly. As a result, a large number of unqualified enameled superconducting wires affected by painting problems have been produced, leading to an increase in production costs and a large amount of resource waste. Therefore, it is crucial to reuse these unqualified wires.

[0003] However, the painting process of superconducting wires has always been considered an irreversible process. On the one hand, because the painting process mainly uses the method of multiple thin coatings to tightly bond the paint layer with the superconducting wire, it is difficult to peel off the paint film by physical methods. Even if the surface paint film is removed by scraping or laser sintering, it will damage the surface of the superconducting wire, resulting in its inability to be used again. On the other hand, the current paint stripping method for enameled superconducting wires is limited to a few meters each time and cannot achieve continuous and stable paint stripping. Therefore, it is difficult to completely strip the paint from enameled superconducting wires with lengths of several kilometers or even tens of thousands of meters. Summary of the Invention

[0004] The purpose of the present invention is to provide a continuous and efficient paint stripping method for enameled superconducting wires to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A continuous and efficient paint stripping method for enameled superconducting wires, comprising the following steps:

[0007] Step 1: Load the enameled superconducting wire into a wire pay-off device, and pass the enameled superconducting wire through a laser wire stripper. Continuously bombard the surface of the enameled superconducting wire with laser to obtain an enameled superconducting wire with a reduced surface paint film thickness or local damage.

[0008] Step 2: Pass the enameled superconducting wire with a reduced surface paint film thickness or local damage through an ultrasonic immersion tank. Dissolve the organic adhesive between the surface paint film and the internal bare wire of the enameled superconducting wire with the solution inside the ultrasonic immersion tank to obtain an enameled superconducting wire with the surface paint film swollen and bulged and separated from the internal bare wire.

[0009] Step 3: Pass the enameled superconducting wire with the surface paint film swollen and bulged and separated from the internal bare wire through a spray pool to obtain a bare wire without a paint film on the surface.

[0010] Step 4: Pass the bare wire without a paint film on the surface through an ultrasonic cleaning tank and a hair dryer in sequence to obtain a clean bare wire on the surface.

[0011] Step 5: Horizontally pass the clean bare wire through the trimming die, and densely arrange the bare wire on the take-up reel.

[0012] Further preferably, in step 1, the wire release speed of the wire release device is 10 - 30 m / min, and the film thickness of the enameled superconducting wire loaded into the wire release device is 0.05 mm - 0.20 mm.

[0013] Further preferably, in step 1, the laser power of the laser wire stripper is 2 - 5 w, and the laser beam wavelength is 330 - 380 nm, ensuring that when continuously bombarding the surface of the enameled superconducting wire with laser, the surface of the internal bare wire will not be damaged.

[0014] Further preferably, in step 2, the ultrasonic soaking tank includes two ultrasonic soaking tank bodies stacked, steering guide wheels are symmetrically arranged at both ends of the ultrasonic soaking tank body, guiding rollers are arranged on both sides of the ultrasonic soaking tank body close to the steering guide wheels, a plurality of positioning rollers are uniformly arranged inside the ultrasonic soaking tank body, a heating resistor is arranged at the bottom of the ultrasonic soaking tank body, and a liquid level sensor is also arranged inside the ultrasonic soaking tank body.

[0015] Further preferably, the enameled superconducting wire with thinned or locally damaged surface film passes through the surface of the steering guide wheel at the inlet end of the ultrasonic soaking tank body, the surface of the guiding roller at the inlet end of the ultrasonic soaking tank body, the bottom of the uniformly arranged plurality of positioning rollers, the surface of the guiding roller at the outlet end of the ultrasonic soaking tank body, and the surface of the steering guide wheel at the outlet end of the ultrasonic soaking tank body in sequence, and the enameled superconducting wire with thinned or locally damaged surface film is circulated through the ultrasonic soaking tank body for 3 - 9 times.

[0016] Further preferably, the solution inside the ultrasonic soaking tank body is concentrated formic acid diluted 99% with high-purity deionized water, the formic acid concentration in the diluted solution is 60% - 70%, the solution temperature is 45°C ± 1°C, and the liquid level height of the solution is 5 ± 1 cm higher than the enameled superconducting wire with thinned or locally damaged surface film.

[0017] Further preferably, in step 3, when the enameled superconducting wire with the swollen surface film separated from the internal bare wire passes through the spray pool, the high-pressure water gun in the spray pool sprays towards the enameled superconducting wire with the swollen surface film separated from the internal bare wire at an angle of 20 - 90° in the opposite direction of the traveling direction of the enameled superconducting wire with the swollen surface film separated from the internal bare wire. Under the action of the high-pressure water gun, the swollen film on the surface of the enameled superconducting wire with the swollen surface film separated from the internal bare wire completely falls off.

[0018] Further preferably, in step 5, the trimming die is a polycrystalline die, the surface roughness Ra of the polycrystalline die is less than 0.2 μm, the die hole size of the sizing zone of the polycrystalline die is 0.001 - 0.002 mm smaller than the size of the clean bare wire surface, the length of the sizing zone of the polycrystalline die is 2 - 3 times that of the ordinary die, and the sizing zone of the polycrystalline die adopts a double chamfer design. It mainly plays a role in trimming the roundness and straightness of the bare wire, improving the surface quality of the bare wire, and making the bare wire reach the state before being painted.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The laser power of the laser wire stripper is 2 - 5 w, and the laser beam wavelength is 330 - 380 nm, ensuring that when the surface of the enameled superconducting wire is continuously bombarded by the laser, the surface of the internal bare wire will not be damaged.

[0021] The solution inside the ultrasonic immersion tank body is concentrated formic acid diluted with high-purity deionized water by 99%, and the formic acid concentration in the diluted solution is 60% - 70%. The formic acid solution with this concentration can effectively dissolve the organic binder between the enameled superconducting wire with a thinned or locally damaged surface enamel film and the enamel film.

[0022] The solution temperature is 45°C ± 1°C. On the one hand, it can accelerate the dissolution of the organic binder between the enameled superconducting wire with a thinned or locally damaged surface enamel film and the enamel film. On the other hand, in cooperation with the ultrasonic immersion tank body, it can vibrate to separate the enameled superconducting wire with a thinned or locally damaged surface enamel film from the enamel film.

[0023] Through the action of the guiding roller and the positioning roller, and in cooperation with the liquid level sensor, the liquid level height of the solution can always be kept 5 ± 1 cm higher than the enameled superconducting wire with a thinned or locally damaged surface enamel film, ensuring that the enameled superconducting wire with a thinned or locally damaged surface enamel film can always be immersed in the solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is the processing flow chart of the continuous and efficient paint stripping method for the enameled superconducting wire of the present invention;

[0025] Figure 2 It is the front structure schematic diagram of the ultrasonic immersion tank of the present invention;

[0026] Figure 3 It is the top view structure schematic diagram of the ultrasonic immersion tank of the present invention;

[0027] In the figure: 1. Steering guide wheel; 2. Ultrasonic immersion tank body; 3. Heating resistor; 4. Guiding roller; 5. Positioning roller; 6. Liquid level sensor. DETAILED DESCRIPTION OF THE INVENTION

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1-3 , the present invention provides a technical solution:

[0030] A continuous and efficient paint stripping method for enameled superconducting wire, comprising the following steps:

[0031] Step 1: Load the enameled superconducting wire into the wire pay-off device, and pass the enameled superconducting wire through the laser wire stripper. Continuously bombard the surface of the enameled superconducting wire with laser to obtain an enameled superconducting wire with a reduced surface paint film thickness or local damage.

[0032] Step 2: Pass the enameled superconducting wire with a reduced surface paint film thickness or local damage through the ultrasonic immersion tank, and dissolve the organic adhesive between the surface paint film and the internal bare wire of the enameled superconducting wire through the solution inside the ultrasonic immersion tank to obtain an enameled superconducting wire with a swollen and bulging surface paint film separated from the internal bare wire.

[0033] Step 3: Pass the enameled superconducting wire with a swollen and bulging surface paint film separated from the internal bare wire through the spray pool to obtain a bare wire without a paint film on the surface.

[0034] Step 4: Pass the bare wire without a paint film on the surface through the ultrasonic cleaning tank and the air dryer in sequence to obtain a clean bare wire on the surface.

[0035] Step 5: Horizontally pass the clean bare wire on the surface through the trimming die, and densely arrange the bare wire on the take-up reel.

[0036] In the present invention, in Step 1, the wire pay-off speed of the wire pay-off device is 10 - 30 m / min, and the paint film thickness of the enameled superconducting wire loaded into the wire pay-off device is 0.05 mm - 0.20 mm.

[0037] In the present invention, in Step 1, the laser power of the laser wire stripper is 2 - 5 w, and the laser beam wavelength is 330 - 380 nm, ensuring that when continuously bombarding the surface of the enameled superconducting wire with laser, the surface of the internal bare wire will not be damaged.

[0038] In the present invention, in step 2, the ultrasonic immersion tank includes two ultrasonic immersion tank bodies 2 arranged in a stacked manner. Steering guide wheels 1 are symmetrically arranged at both ends of the ultrasonic immersion tank body 2. Guide rollers 4 are arranged on both sides of the ultrasonic immersion tank body 2 close to the steering guide wheels 1. A plurality of positioning rollers 5 are evenly arranged inside the ultrasonic immersion tank body 2. A heating resistor 3 is arranged at the bottom of the ultrasonic immersion tank body 2. A liquid level sensor 6 is also arranged inside the ultrasonic immersion tank body 2.

[0039] In the present invention, the enameled superconducting wire with a reduced surface paint film thickness or local damage sequentially passes through the surface of the steering guide wheel 1 at the inlet end of the ultrasonic immersion tank body 2, the surface of the guide roller 4 at the inlet end of the ultrasonic immersion tank body 2, the bottoms of the evenly arranged plurality of positioning rollers 5, the surface of the guide roller 4 at the outlet end of the ultrasonic immersion tank body 2, and the surface of the steering guide wheel 1 at the outlet end of the ultrasonic immersion tank body 2. And the enameled superconducting wire with a reduced surface paint film thickness or local damage is circulated through the ultrasonic immersion tank body 2 for 3 - 9 times.

[0040] In the present invention, the solution inside the ultrasonic immersion tank body 2 is concentrated formic acid diluted 99% with high-purity deionized water. The formic acid concentration in the diluted solution is 60% - 70%. The solution temperature is 45°C ± 1°C. And the liquid level height of the solution is 5 ± 1 cm higher than the enameled superconducting wire with a reduced surface paint film thickness or local damage.

[0041] In the present invention, in step 3, when the enameled superconducting wire with the surface paint film swollen and separated from the internal bare wire passes through the spray pool, the high-pressure water gun in the spray pool sprays towards the enameled superconducting wire with the surface paint film swollen and separated from the internal bare wire at an angle of 20 - 90° in the opposite direction of the traveling direction of the enameled superconducting wire with the surface paint film swollen and separated from the internal bare wire. Under the action of the high-pressure water gun, the swollen paint film on the surface of the enameled superconducting wire with the surface paint film swollen and separated from the internal bare wire completely falls off.

[0042] In the present invention, in step 5, the finishing die is a polycrystalline die. The surface roughness Ra of the polycrystalline die is < 0.2 μm. The die hole size of the sizing zone of the polycrystalline die is 0.001 - 0.002 mm smaller than the size of the surface-cleaned bare wire. The length of the sizing zone of the polycrystalline die is 2 - 3 times that of the ordinary die. And the sizing zone of the polycrystalline die adopts a double-sided chamfer design. The polycrystalline die mainly plays a role in trimming the roundness and straightness of the bare wire, improving the surface quality of the bare wire, and making the bare wire reach the state before painting.

[0043] Example 1: This example provides an enameled superconducting wire with an insulation specification of Φ1.200 mm, a paint film thickness of 0.1 mm, and a length of 4500 m.

[0044] Step 1: Load the enameled superconducting wire into the wire pay-off device with a pay-off speed of 15 m / min, and pass the enameled superconducting wire through the laser wire stripper. Continuously bombard the surface of the enameled superconducting wire with laser to obtain an enameled superconducting wire with a reduced surface paint film or local damage. The laser power of the laser wire stripper is 5 W, and the laser beam wavelength is 340 nm, ensuring that the surface of the bare wire inside will not be damaged when continuously bombarding the surface of the enameled superconducting wire with laser;

[0045] Step 2: Pass the enameled superconducting wire with a reduced surface paint film or local damage through the ultrasonic immersion tank. The enameled superconducting wire with a reduced surface paint film or local damage passes through the surface of the turning guide wheel 1 at the inlet end of the ultrasonic immersion tank body 2, the surface of the guide roller 4 at the inlet end of the ultrasonic immersion tank body 2, the bottoms of multiple uniformly arranged positioning rollers 5, the surface of the guide roller 4 at the outlet end of the ultrasonic immersion tank body 2, and the surface of the turning guide wheel 1 at the outlet end of the ultrasonic immersion tank body 2 in sequence, and pass the enameled superconducting wire with a reduced surface paint film or local damage through the ultrasonic immersion tank body 2 in a loop for a total of 7 times. The solution inside the ultrasonic immersion tank body 2 is concentrated formic acid diluted by 99% with high-purity deionized water, the formic acid concentration in the diluted solution is 65%, the solution temperature is 45 °C, and the liquid level height of the solution is 5 ± 1 cm higher than the enameled superconducting wire with a reduced surface paint film or local damage. Dissolve the organic adhesive between the surface paint film and the internal bare wire of the enameled superconducting wire through the solution inside the ultrasonic immersion tank, and cooperate with the ultrasonic vibration function of the ultrasonic immersion tank body 2 itself to obtain an enameled superconducting wire with a swollen and bulging surface paint film separated from the internal bare wire;

[0046] Step 3: Pass the enameled superconducting wire with a swollen and bulging surface paint film separated from the internal bare wire through the spray pool. The high-pressure water gun in the spray pool sprays towards the enameled superconducting wire with a swollen and bulging surface paint film separated from the internal bare wire at an angle of 50° in the opposite direction of the traveling direction of the enameled superconducting wire with a swollen and bulging surface paint film separated from the internal bare wire. Under the action of the high-pressure water gun, the swollen and bulging paint film on the surface of the enameled superconducting wire with a swollen and bulging surface paint film separated from the internal bare wire completely falls off, obtaining a bare wire without a paint film on the surface;

[0047] Step 4: Pass the bare wire without a paint film on the surface through the ultrasonic cleaning tank and the air dryer in sequence. Further clean the bare wire without a paint film on the surface through the ultrasonic cleaning tank, and cooperate with the air dryer to remove the water stains on the surface of the bare wire. After cleaning and drying, there is no paint film residue on the surface of the bare wire, obtaining a clean bare wire on the surface;

[0048] Step 5: Horizontally pass the clean bare wire on the surface through the polycrystalline die. The roughness Ra of the polycrystalline die is <0.2 μm, the die hole size of the sizing zone of the polycrystalline die is Φ1.098 mm, and the length of the sizing zone of the polycrystalline die is 2 - 3 times that of the ordinary die. The surface of the bare wire passing through the outlet zone of the polycrystalline die is smooth and shiny with a metallic luster, and the roundness and straightness are good without bending, and the bare wire is densely arranged on the take-up reel.

[0049] Example 2: This example provides an enameled superconducting wire with an insulation specification of 1.440 mm × 0.960 mm, a paint film thickness of 0.08 mm, and a length of 6000 m.

[0050] Step 1: Load the enameled superconducting wire into the wire pay-off device. The wire pay-off speed of the wire pay-off device is 15 m / min, and pass the enameled superconducting wire through the laser wire stripper. Continuously bombard the surface of the enameled superconducting wire with laser to obtain an enameled superconducting wire with a reduced surface paint film or local damage. The laser power of the laser wire stripper is 4 W, and the laser beam wavelength is 350 nm, ensuring that when continuously bombarding the surface of the enameled superconducting wire with laser, the surface of the internal bare wire will not be damaged.

[0051] Step 2: Pass the enameled superconducting wire with a reduced surface paint film or local damage through the ultrasonic immersion tank. The enameled superconducting wire with a reduced surface paint film or local damage passes through the surface of the turning guide wheel 1 at the inlet end of the ultrasonic immersion tank body 2, the surface of the guide roller 4 at the inlet end of the ultrasonic immersion tank body 2, the bottoms of a plurality of uniformly arranged positioning rollers 5, the surface of the guide roller 4 at the outlet end of the ultrasonic immersion tank body 2, and the surface of the turning guide wheel 1 at the outlet end of the ultrasonic immersion tank body 2 in sequence, and pass the enameled superconducting wire with a reduced surface paint film or local damage through the ultrasonic immersion tank body 2 in a loop for a total of 7 times. The solution inside the ultrasonic immersion tank body 2 is concentrated formic acid diluted by 99% with high-purity deionized water. The formic acid concentration in the diluted solution is 65%, the solution temperature is 45 °C, and the liquid level height of the solution is 5 ± 1 cm higher than the enameled superconducting wire with a reduced surface paint film or local damage. Dissolve the organic adhesive between the surface paint film and the internal bare wire of the enameled superconducting wire through the solution inside the ultrasonic immersion tank, and cooperate with the ultrasonic vibration function of the ultrasonic immersion tank body 2 itself to obtain an enameled superconducting wire with a swollen and bulging surface paint film separated from the internal bare wire.

[0052] Step 3: Pass the enameled superconducting wire with a swollen and bulging surface paint film separated from the internal bare wire through the spray pool. The high-pressure water gun in the spray pool sprays towards the enameled superconducting wire with a swollen and bulging surface paint film separated from the internal bare wire at an angle of 50° in the opposite direction of the traveling direction of the enameled superconducting wire with a swollen and bulging surface paint film separated from the internal bare wire. Under the action of the high-pressure water gun, the swollen and bulging paint film on the surface of the enameled superconducting wire with a swollen and bulging surface paint film separated from the internal bare wire completely falls off, obtaining a bare wire without a paint film on the surface.

[0053] Step 4: Pass the bare wire without a paint film on the surface through the ultrasonic cleaning tank and the air dryer in sequence. Further clean the bare wire without a paint film on the surface through the ultrasonic cleaning tank, and cooperate with the air dryer to remove the water stains on the surface of the bare wire. After cleaning and drying, there is no paint film residue on the surface of the bare wire, obtaining a clean bare wire on the surface.

[0054] Step 5: Horizontally pass the clean bare wire through the polycrystalline die. The roughness Ra of the polycrystalline die is <0.2 μm. The die hole size in the sizing zone of the polycrystalline die is 1.359 mm × 0.878 mm, and the length of the sizing zone of the polycrystalline die is 2 - 3 times that of the ordinary die. The surface of the bare wire passing through the outlet zone of the polycrystalline die is smooth and shiny, with good roundness and straightness, and no bending. Then densely arrange the bare wire on the take-up reel.

[0055] In summary, in the specific implementation process, the efficiency of removing the paint from the enameled superconducting wire is higher. After inspecting the entire wire, the surface of the bare wire after paint removal is smooth and undamaged, the paint film falls off completely, and the surface condition of the bare wire after paint removal is basically the same as that of the bare wire before painting, meeting the requirements for reuse.

[0056] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be encompassed within the present invention, and any reference signs in the claims should not be regarded as limiting the claims involved.

[0057] The above is only the preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A method for continuous and efficient paint stripping of enameled superconducting wire, characterized in that: The following steps are involved: Step 1, loading the enameled superconducting wire into a wire pay-off device, and passing the enameled superconducting wire through a laser wire stripping machine, and continuously bombarding the surface of the enameled superconducting wire with a laser to obtain an enameled superconducting wire with a thinned surface paint film or partially damaged surface; Step 2: Pass the enameled superconducting wire whose surface paint film is thinned or partially damaged through an ultrasonic immersion tank, and dissolve the organic adhesive between the surface paint film and the internal bare wire of the enameled superconducting wire by the solution inside the ultrasonic immersion tank, so as to obtain an enameled superconducting wire whose surface paint film is swollen and separated from the internal bare wire; the ultrasonic immersion tank comprises two ultrasonic immersion tank bodies (2) arranged in a stacked manner, and the ultrasonic immersion tank bodies (2) are symmetrically provided with steering guide wheels (1) at both ends, and the ultrasonic immersion tank bodies (2) are provided with guide rollers (4) on both sides close to the steering guide wheels (1), and the ultrasonic immersion tank bodies (2) are evenly provided with a plurality of positioning rollers (5) inside. A heating resistor (3) is arranged at the bottom of the ultrasonic immersion tank body (2), and a liquid level sensor (6) is also arranged inside the ultrasonic immersion tank body (2); the enameled superconducting wire with a thinned surface paint film or partially damaged passes through the surface of the steering guide wheel (1) at the inlet end of the ultrasonic immersion tank body (2), the surface of the guide roller (4) at the inlet end of the ultrasonic immersion tank body (2), the bottom of a plurality of uniformly arranged positioning rollers (5), the surface of the guide roller (4) at the outlet end of the ultrasonic immersion tank body (2), and the surface of the steering guide wheel (1) at the outlet end of the ultrasonic immersion tank body (2), and the enameled superconducting wire with a thinned surface paint film or partially damaged passes through the ultrasonic immersion tank body (2) in a cycle for a total of 3 to 9 times; Step 3, passing the enameled superconducting wire with the swollen paint film on the surface separated from the inner bare wire through a spray pool to obtain a bare wire without a paint film on the surface; Step 4, passing the bare wire without paint film on the surface through an ultrasonic cleaning tank and an air dryer in sequence to obtain a bare wire with a clean surface; Step 5: Pass the clean bare wire horizontally through the trimming die and place the bare wire densely on the take-up wheel.

2. A method for continuous and efficient paint stripping of enameled superconducting wire according to claim 1, characterized in that: In step 1, the pay-off speed of the pay-off device is 10-30 m / min, and the thickness of the paint film of the enameled superconducting wire loaded into the pay-off device is 0.05 mm-0.20 mm.

3. A method for continuous and efficient paint stripping of enameled superconducting wire according to claim 1, characterized in that: In step 1, the laser power of the laser wire stripping machine is 2-5W, and the laser beam wavelength is 330-380nm, so as to ensure that the surface of the enameled superconducting wire is not damaged when the laser continuously bombards the surface of the enameled superconducting wire.

4. A method for continuous and efficient paint stripping of enameled superconducting wire according to claim 1, characterized in that: The solution inside the ultrasonic immersion tank body (2) is 99% concentrated formic acid diluted with high-purity deionized water, the formic acid concentration in the diluted solution is 60%-70%, the solution temperature is 45°C±1°C, and the liquid level of the solution is 5±1 cm higher than the enameled superconducting wire whose surface paint film is thinned or partially damaged.

5. A method for continuous and efficient paint stripping of enameled superconducting wire according to claim 1, characterized in that: In the step 3, when the enameled superconducting wire with swollen paint film on the surface and separated from the internal bare wire passes through the spray pool, the high-pressure water gun in the spray pool sprays the enameled superconducting wire with swollen paint film on the surface and separated from the internal bare wire at an angle of 20-90° in the opposite direction of the traveling direction of the enameled superconducting wire with swollen paint film on the surface and separated from the internal bare wire.

6. A method for continuous and efficient paint stripping of enameled superconducting wire according to claim 1, characterized in that: In step 5, the trimming mold is a polycrystal mold, the roughness of the polycrystal mold Ra is less than 0.2 μm, the mold hole size of the sizing zone of the polycrystal mold is 0.001-0.002 mm smaller than the size of the bare wire with a clean surface, the length of the sizing zone of the polycrystal mold is 2-3 times that of an ordinary mold, and the sizing zone of the polycrystal mold adopts a bidirectional chamfering design.

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