A device and method for detecting the adhesion of a paint film of an enameled wire

Abstract

This invention discloses a device for testing the coating adhesion performance of enameled wire, comprising a workbench, a chassis, and a panel. The chassis is fixedly mounted on the rear side of the workbench. A controller is mounted on the panel. The workbench is equipped with a clamping and torsion mechanism capable of synchronous counter-movement, used to clamp the enameled wire and drive it to twist. The chassis is respectively equipped with a winding mandrel assembly, a slidable variable pressure coating scraping detection mechanism, and a movable visual inspection component. This invention adopts a single-station integrated structure, integrating enameled wire winding, torsion, constant pressure coating scraping, micro-etching and marking, and visual defect detection functions into one unit. It abandons the traditional split-type testing equipment operation mode, requiring only one sample clamping to complete the entire process of testing, completely solving the positioning errors and cumbersome operation problems caused by multiple clamping, significantly improving testing efficiency and data consistency, and realizing automated and integrated testing of the coating performance of enameled wire.

Description

Technical Field

[0001] This invention belongs to the technical field of enameled wire performance testing equipment, specifically relating to a device and method for testing the coating adhesion performance of enameled wire. Background Technology

[0002] Enameled wire is a core category of winding wire. Due to its excellent insulation, temperature resistance, and electrical conductivity, it is widely used in motors, transformers, household appliances, new energy electrical control equipment, and precision electronic components. The insulating varnish film on the surface of the enameled wire is the core structure ensuring its electrical insulation performance. The adhesion stability of the varnish film to the copper wire substrate directly determines the service life and operational safety of the enameled wire. If the varnish film has defects such as poor adhesion, micro-cracks, or localized delamination, insulation breakdown, short circuits, and leakage are likely to occur during equipment operation, seriously affecting the operational stability and safety of electrical equipment. Therefore, the varnish film adhesion performance is a core testing indicator for factory inspection and quality sampling of enameled wire.

[0003] Currently, the industry primarily uses a split-type, single-machine testing mode for testing the coating adhesion performance of enameled wire. This involves separate testing machines—winding testers, torsion testers, and scratch testers—to perform performance testing under different conditions. This fragmented testing process suffers from low automation and numerous technical shortcomings. Firstly, traditional testing equipment is a separate, independent structure. Winding, torsion, and scratch testing must be performed on separate equipment at separate stations. Samples require multiple clamping and positioning operations, making the testing cumbersome, inefficient, and prone to positioning errors, resulting in poor data consistency and insufficient testing accuracy.

[0004] Therefore, there is an urgent need to design an integrated testing device and method for testing the coating adhesion performance of enameled wires of various specifications to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to solve the technical problem of separate operations for enameled wire coating inspection in the prior art, and to provide a device and method for testing the coating adhesion performance of enameled wire, so as to realize the entire process of winding, twisting, constant pressure coating scraping, micro-etching and visual defect detection in a single station.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A device for testing the coating adhesion performance of enameled wire includes a workbench, a chassis, and a panel. The chassis is fixedly mounted on the rear side of the workbench. A controller is mounted on the panel. The workbench is equipped with a clamping and torsion mechanism that can synchronously move in opposite directions to clamp the enameled wire and drive it to twist. The chassis is equipped with a winding mandrel assembly, a slidable variable-pressure coating scraping detection mechanism, and a movable visual inspection component. The winding mandrel assembly has a telescopic displacement and detachable shaft replacement structure for winding enameled wire samples. The clamping and torsion mechanism can synchronously move in opposite directions with the winding action of the enameled wire, dynamically compensating for the winding length of the enameled wire and preventing the enameled wire from stretching and breaking. The variable-pressure coating scraping detection mechanism is equipped with a pressure-adjustable coating scraping structure and an electrolyte spraying and marking structure. The controller electrically links all mechanisms to operate in a coordinated manner, completing the enameled wire winding, torsion, constant-pressure coating scraping, micro-etching and marking, and visual defect detection operations in one integrated station.

[0007] Furthermore, the clamping and torsion mechanism includes a synchronous lead screw transmission mechanism, a linear sliding guide rail, and two symmetrically arranged brackets. The synchronous lead screw transmission mechanism adopts a bidirectional lead screw drive structure. The brackets on both sides are slidably mounted on the linear sliding guide rail. Correspondingly mounted on the brackets are mutually cooperating fixed clamping chucks, torsion drive devices, and rotating clamping chucks.

[0008] Furthermore, the winding mandrel assembly includes a motor output end, a sleeve, and a detachable winding shaft. The motor output end can be telescopically moved as a whole. The sleeve is fixedly installed at the end of the motor output end. The detachable winding shaft is detachably inserted into the sleeve, and a long groove structure for inserting the enameled wire sample is provided in the middle of the detachable winding shaft.

[0009] Furthermore, the variable pressure paint scraping detection mechanism includes a horizontal moving arm, a mounting frame, a servo electric cylinder, a paint scraper, an electrolyte storage tank, a pressurizing pump, and a micro-spray valve. The horizontal moving arm is slidably embedded in a groove on the front of the chassis. The mounting frame is telescopically mounted on the horizontal moving arm. The servo electric cylinder is vertically fixed to the top of the mounting frame. A pressure sensor is mounted on the output end of the servo electric cylinder. The bottom end of the pressure sensor is fixedly connected to the paint scraper.

[0010] Furthermore, the pressure sensor is sandwiched between the servo electric cylinder and the paint scraper, and is assembled with the servo electric cylinder to form a pressure-adjustable assembly structure.

[0011] Furthermore, two sets of limiting slide rods are provided through the mounting frame. The bottom end of the limiting slide rod is fixedly connected to the mounting seat of the paint scraper. The limiting slide rod and the mounting frame slide together to limit the movement trajectory of the paint scraper to vertical lifting.

[0012] Furthermore, the visual inspection component includes a horizontal guide rail, a visual sensor, and a ring-shaped shadowless fill light. The horizontal guide rail is fixedly mounted on the bottom of the top frame of the chassis, the visual sensor is slidably mounted on the horizontal guide rail, and the ring-shaped shadowless fill light is fixedly mounted on the lens end of the visual sensor.

[0013] Furthermore, the electrolyte storage tank, the pressurizing pump, and the micro-spray valve are connected in sequence, and the spray nozzle of the micro-spray valve is set towards the detection area of ​​the enameled wire sample; an L-frame is fixedly installed at the bottom of the electrolyte storage tank, and a liquid collection tank is fixedly installed on the L-frame, which is located below the detection area of ​​the enameled wire and directly below the micro-spray valve.

[0014] Furthermore, the panel is also equipped with indicator lights, which are electrically connected to the controller.

[0015] A method for testing the coating adhesion performance of enameled wire includes the following steps: S1. Sample clamping: Clamp both ends of the enameled wire sample between the fixed clamping head and the rotating clamping head respectively to complete the coaxial positioning installation. S2, Winding Compensation Operation: Control the extension and retraction of the winding mandrel assembly so that the detachable winding shaft can be inserted into the enameled wire sample and rotated and wound. The synchronous screw transmission mechanism drives the two side supports to move closer to each other to compensate for the winding length of the enameled wire. S3. Torsion test: The torsion drive device rotates the enameled wire sample a preset number of times; S4. Constant pressure scraping operation: Control the variable pressure scraping detection mechanism to slide to the detection station, and the servo electric cylinder, in conjunction with the pressure sensor, adjusts the downward pressure to perform axial scraping on the surface of the enameled wire. S5. Micro-etching and waste liquid collection: The pressurizing pump pressurizes the electrolyte storage tank, so that the electrolyte is sprayed through the micro-spray valve to the enameled wire detection area. The liquid collection tank installed on the L frame receives the sprayed waste liquid. S6. Visual inspection operation: The horizontal guide rail moves the visual sensor to the inspection area, and the ring shadowless supplementary light completes the defect image acquisition. S7. Data rating output: The controller determines the coating adhesion performance level of the enameled wire based on the test data and generates a test report.

[0016] In summary, the present invention has the following beneficial technical effects: This invention adopts a single-station integrated structure, integrating the functions of enameled wire winding, twisting, constant pressure scraping, micro-etching and visual defect detection into one unit. It abandons the operation mode of traditional split-type testing equipment, and only requires one sample clamping to complete the entire process of testing. It completely solves the problems of positioning error and cumbersome operation caused by multiple clamping, greatly improves the testing efficiency and the consistency of test data, and realizes the automated and integrated testing of the enameled wire coating performance. Attached Figure Description

[0017] The disclosure of this invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. In the drawings, the same reference numerals are used to refer to the same parts.

[0018] in: Figure 1 This is a three-dimensional illustration of the present invention. Figure 1 ; Figure 2 This is a three-dimensional illustration of the present invention. Figure 2 ; Figure 3 This is a bottom-view structural diagram of the present invention; Figure 4 This is a front structural diagram of the present invention; Figure 5 This is the invention Figure 3 Enlarged structural diagram at point A in the middle; Figure 6 This is a schematic diagram of the structure of the variable pressure paint scraping detection mechanism of the present invention. Figure 1 ; Figure 7 This is a schematic diagram of the structure of the variable pressure paint scraping detection mechanism of the present invention. Figure 2 .

[0019] Explanation of reference numerals in the attached drawings: 1. Workbench; 101. Synchronous lead screw transmission mechanism; 102. Bracket; 103. Fixed clamping chuck; 104. Torsional drive device; 105. Rotating clamping chuck; 106. Linear sliding guide rail; 2. Chassis; 201. Top frame; 202. Horizontal guide rail; 203. Vision sensor; 204. Ring shadowless supplementary light; 3. Panel; 301. Controller; 302. Indicator light; 4. Winding mandrel assembly; 401. Motor output end; 402. Sleeve; 403. Detachable winding shaft; 5. Variable pressure paint scraping detection mechanism; 501. Horizontal moving arm; 502. Mounting bracket; 503. Servo electric cylinder; 504. Paint scraper blade; 505. Electrolyte storage tank; 506. Pressurization pump; 507. Micro-spray valve; 508. Pressure sensor; 6. Liquid collection tank. Detailed Implementation

[0020] According to the technical solution of the present invention, without changing the essential spirit of the present invention, those skilled in the art can propose various interchangeable structural methods and implementations. Therefore, the following detailed embodiments and accompanying drawings are merely exemplary descriptions of the technical solution of the present invention, and should not be regarded as the entirety of the present invention or as a limitation or restriction of the technical solution of the present invention.

[0021] The following is combined Figures 1 to 7The invention will be further described in detail with reference to specific embodiments. By optimizing the cooperation structure of each mechanism, the invention effectively solves various practical defects in traditional testing, such as easy tensile breakage of samples, uncontrollable paint scraping pressure, difficulty in identifying minute defects, and waste liquid pollution of equipment, on the basis of achieving integrated testing. It is suitable for high-precision testing needs of enameled wires of various specifications.

[0022] Example 1 This embodiment provides a device for testing the coating adhesion performance of enameled wires, suitable for testing conventional small and medium diameter enameled wires. The specific structure is as follows: like Figure 1 and Figure 2 As shown, the main body of the device consists of a workbench 1, a chassis 2, and a panel 3. The chassis 2 is fixedly installed on the top rear side of the workbench 1. The panel 3 is embedded in the front of the device. A controller 301 is fixedly mounted in the center of the panel 3, and indicator lights 302 are mounted on the side of the panel 3. The indicator lights 302 are electrically connected to the controller 301 and are used to provide feedback on the working status of the device, such as operation, fault, and completion of testing. A clamping and torsion mechanism is mounted on the top of the workbench 1. The clamping and torsion mechanism consists of a synchronous screw drive mechanism 101, a linear sliding guide rail 106, and two supports 102 arranged symmetrically on the left and right. The synchronous screw drive mechanism 101 adopts a bidirectional screw drive structure, with the two ends of the screw corresponding to the linear sliding guide rail 106. The bottoms of the two supports 102 are slidably mounted on the linear sliding guide rail 106 and can make synchronous opposing sliding movements along the guide rail. The left bracket 102 is fixedly equipped with a fixed clamping head 103, and the right bracket 102 is equipped with a torsion drive device 104. The drive device 104 is a servo motor. The output end of the torsion drive device 104 is coaxially equipped with a rotating clamping head 105. The fixed clamping head 103 and the rotating clamping head 105 are coaxially arranged to stably clamp and fix the enameled wire sample. At the same time, the torsion drive device 104 can drive the sample to rotate and torsion, simulating the torsion stress condition of the enamel film.

[0023] like Figures 3 to 7As shown, a horizontal guide rail 202 is fixedly mounted on the bottom of the top frame 201 of the chassis 2. A vision sensor 203 is slidably mounted on the horizontal guide rail 202. A ring shadowless fill light 204 is fixedly mounted on the lens end of the vision sensor 203. It can move left and right with the horizontal guide rail 202 to realize full-area detection of enameled wire. The ring shadowless fill light 204 can eliminate the blind spots of light and shadow in the detection area and ensure clear and uniform defect imaging. A transverse sliding groove is provided on the front of the chassis 2. The transverse sliding arm 501 of the transformer paint scraping detection mechanism 5 is slidably embedded in the groove. The other end of the transverse sliding arm 501, which is inside the chassis 2, is equipped with a linear motor or ball screw to drive the transverse sliding arm 501 to move laterally, realizing the overall transverse sliding. This is a conventional linear sliding drive structure in the field, so it is not described in detail and is not shown in the figure. A telescopic mounting bracket 502 is mounted on the transverse sliding arm 501. A servo electric cylinder 503 is vertically fixed at the top of the mounting bracket 502. A pressure sensor 508 is mounted with the output end of the servo electric cylinder 503 facing downward. The bottom end of the pressure sensor 508 is fixedly connected to the paint scraper 504. The pressure sensor 508 collects the paint scraping contact pressure in real time, forming a closed-loop pressure regulation structure with the servo electric cylinder 503. Two sets of symmetrically arranged limit slides are arranged through the mounting bracket 502. The bottom end of the limit slides is fixed to the mounting seat of the paint scraper 504, so that the paint scraper 504 can only move up and down in the vertical direction, eliminating deviation and shaking, and ensuring the stability of the paint scraping operation.

[0024] like Figure 6 and Figure 7 As shown, the transformer-type paint scraping testing mechanism 5 is equipped with an electrolyte storage tank 505, a pressurizing pump 506, and a micro-spray valve 507. The electrolyte storage tank 505, pressurizing pump 506, and micro-spray valve 507 are connected sequentially through pipelines. The nozzle of the micro-spray valve 507 is set towards the enameled wire testing area, enabling precise micro-spraying of electrolyte. An L-shaped frame is fixedly welded to the bottom of the electrolyte storage tank 505. A liquid collection tank 6 is fixedly installed at the horizontal end of the L-shaped frame. The liquid collection tank 6 is horizontally arranged directly below the micro-spray valve 507 and below the enameled wire sample testing area to collect the electrolyte waste liquid falling from the spray in real time, preventing waste liquid from overflowing and contaminating the equipment.

[0025] like Figure 1 , Figure 4 and Figure 5As shown, the winding mandrel assembly 4 is assembled in the middle of the chassis 2. The winding mandrel assembly 4 includes a motor output end 401, a sleeve 402, and a detachable winding shaft 403. The motor output end 401 can be moved back and forth as a whole. Furthermore, an electrically controlled slide rail needs to be provided for the drive motor connected to the motor output end 401 to realize the extension and retraction displacement of the drive motor and the drive motor output end 401. Other drive methods can also be selected, such as screw drive or linear motor drive. The sleeve 402 is fixedly installed at the end of the motor output end 401. The detachable winding shaft 403 is detachably assembled inside the sleeve 402 by plugging in, which is convenient for disassembly and assembly and can be replaced to adapt to different testing needs. A long slot is opened in the middle of the detachable winding shaft 403 to hold the enameled wire sample and ensure that the sample fits stably during the winding process without deviation or slippage.

[0026] The controller 301 is electrically connected to the synchronous lead screw transmission mechanism 101, the torsion drive device 104, the winding mandrel assembly 4, the servo electric cylinder 503, the pressure pump 506, and the vision sensor 203 respectively, to realize the coordinated and automated control of the entire equipment.

[0027] The detection method based on the device of this embodiment includes the following steps: S1. Sample clamping: Select a standard 0.5mm diameter enameled wire as the test sample. Clamp and fix both ends of the sample between the fixed clamping head 103 and the rotating clamping head 105 respectively to ensure that the sample is horizontally tensioned and the coaxiality meets the standard, and complete the clamping and positioning. S2. Winding Compensation Operation: The drive motor connected to the motor output end 401 is equipped with an electrically controlled slide rail. The controller 301 issues a command to control the motor output end 401 to extend and retract forward, so that the long slot of the detachable winding shaft 403 is inserted into the middle of the enameled wire sample. The motor starts and drives the detachable winding shaft 403 to rotate at a constant speed to wind the sample. At the same time, the synchronous screw transmission mechanism 101 starts and drives the left and right side supports 102 to slowly move towards each other, dynamically compensating for the reduction in the effective length of the enameled wire during the winding process. It adapts to the changes in the winding wire length in real time, always keeping the sample taut and without tensile stress. This effectively avoids the problems of enameled wire tautness and tensile breakage caused by traditional fixed support winding. While protecting the integrity of the sample, it ensures that the stress state of the enamel film conforms to the actual service conditions, improving the authenticity of the test.

[0028] S3. Torsion test: After completing the preset number of turns of winding, the winding mandrel assembly 4 is reset, the torsion drive device 104 is started, and the enameled wire sample is rotated a preset number of turns in both the forward and reverse directions to simulate the torsion stress condition of the enameled wire in actual use. S4. Constant Pressure Scraping Operation: Based on the testing standards for 0.5mm diameter enameled wire, the controller 301 presets the scraping pressure value. The variable pressure scraping testing mechanism 5 slides along the slide groove of the chassis 2 to the sample testing station. The servo electric cylinder 503 drives the scraper blade 504 to press down vertically. The pressure sensor 508 provides real-time feedback on the contact pressure, forming a closed-loop pressure regulation structure with the servo electric cylinder 503. The downward stroke is dynamically fine-tuned to maintain a constant pressure state for axial uniform scraping of the enameled wire surface. This can accurately adapt to the hardness and thickness of the enamel film of conventional enameled wires, avoiding damage to the copper wire substrate due to excessive pressure and preventing the problem of insufficient pressure failing to expose enamel film adhesion defects. With the limit slide rod limiting the vertical lifting trajectory, the scraping deviation and uneven force are completely eliminated, greatly improving the accuracy of scraping testing.

[0029] S5. Micro-etching and waste liquid collection: The pressurizing pump 506 is activated to pressurize the inside of the electrolyte storage tank 505, so that the electrolyte is evenly sprayed onto the enameled wire scraping inspection area through the micro-spray valve 507. After a preset time of settling, the micro-corrosion characteristics of the electrolyte are used to amplify tiny defects that are difficult to be identified by the naked eye, such as micro-cracks, local delamination, and micro-exposed copper in the paint film, thus solving the industry pain point of high missed detection rate of traditional manual visual inspection. At the same time, the L-frame and liquid collection tank 6 suspended at the bottom of the electrolyte storage tank 505 can collect the dripping electrolyte waste liquid throughout the process, avoiding the waste liquid from dripping and corroding the equipment and polluting the working environment, thus improving the cleanliness and safety of equipment operation.

[0030] S6. Visual Inspection Operation: After spraying, the visual sensor 203 slides along the horizontal guide rail 202 to the inspection area. The ring shadowless supplementary light 204 is turned on to supplement the light, eliminating inspection shadows and ensuring uniform imaging across the entire area. The sensor 203 focuses and acquires high-definition images of the enameled wire surface, automatically identifying, marking, and storing the location and type of paint film defects. This replaces the traditional manual subjective judgment mode, making the inspection results objective and standardized, effectively reducing manual inspection errors, and accurately capturing various small and invisible defects. After each step of S2, S3, and S4 is completed individually, this step can be started to cooperate with S5 to perform individual test items on the paint film of the enameled wire.

[0031] S7. Data rating output: The controller 301 integrates winding deformation data, torsional stress data, constant pressure paint scraping data and visual defect detection data, compares them with the national standard paint film adhesion performance rating standard, automatically determines the test level of the sample, generates a standardized test report and stores it.

[0032] Example 2 This embodiment provides a device for testing the coating adhesion performance of enameled wires, which is suitable for testing large-diameter, high-hardness enameled wires. The overall structure of the device is basically the same as that of Embodiment 1, except that: in this embodiment, a detachable winding shaft 403 adapted to large-diameter wires is replaced, and the constant pressure scraping pressure parameter of the servo electric cylinder 503 is increased by the controller 301, and the electrolyte micro-etching time is extended to meet the testing requirements of large-diameter enameled wires.

[0033] The specific testing process is as follows: S1. Sample clamping: Select a 1.5mm diameter thick enameled wire as the test sample. Fix both ends of the sample between the fixed clamping head 103 and the rotating clamping head 105 respectively to ensure that the sample is horizontal and not tilted, and is firmly clamped without loosening or slipping. S2. Winding Compensation Operation: Based on the winding radius requirements of large-diameter enameled wire, the original small-specification winding shaft inside the sleeve 402 is disassembled and replaced with a detachable winding shaft 403 adapted to the large-diameter wire. This process is convenient to install and remove, highly adaptable, and can meet the testing needs of enameled wires of different specifications. The motor output end 401 extends and retracts to complete the sample clamping, and the enameled wire is wound at a uniform speed. The synchronous screw drive mechanism 101 drives the support 102 in real time to compensate for the wire length by offsetting the opposite displacement. Addressing the characteristics of large-diameter enameled wires—high rigidity and easy stress concentration—dynamic length compensation effectively buffers the winding stress, preventing enamel film cracking and sample tensile deformation, ensuring accurate and reliable test data.

[0034] S3. Torsion test: According to the test standard for large diameter enameled wire, the number of torsion turns is increased. The torsion drive device 104 drives the sample to complete multiple positive and negative torsion turns to simulate the coating adhesion performance under harsh working conditions. S4. Constant Pressure Scraping Operation: For thick enamel film structures, the pressure sensor 508 and servo electric cylinder 503 are precisely adjusted in a closed loop to improve adaptability and maintain constant scraping pressure. This ensures that the scraper blade 504 can effectively scrape off the surface enamel film, while strictly locking the pressure threshold to avoid the problem of pressure overload damaging the internal copper wire matrix. Combined with a vertical limiting structure, it achieves uniform and stable axial scraping of thick enamel film enameled wires throughout the process, perfectly adapting to the testing standards of large-size, high-hardness enamel film enameled wires, and greatly improving the equipment's general testing performance.

[0035] S5. Micro-etching and waste liquid collection: Extending the electrolyte spraying and wetting time adapts to the defect manifestation characteristics of thick paint films, fully magnifying difficult-to-observe defects such as deep micro-cracks and invisible delamination, and completely solving the problem of missed detection and incomplete detection of small defects in traditional equipment; the liquid collection tank 6 at the bottom of the electrolyte storage tank 505 collects waste liquid throughout the process, keeps the work area clean, avoids equipment corrosion and aging, and extends the service life of the equipment.

[0036] S6. Visual Inspection Operation: The visual sensor 203 moves and images at multiple points along the horizontal guide rail 202, performing full-area scanning without blind spots on large-size inspection areas. The brightness of the ring shadowless supplementary light 204 can be adjusted according to inspection needs, adapting to the imaging requirements of thick paint films and large-diameter enameled wires, ensuring clear imaging of various minute defects, accurately identifying all defect types, and the detection accuracy and coverage are far superior to traditional manual inspection methods.

[0037] S7. Data rating output: The controller performs data matching and analysis based on the testing standards for large-diameter enameled wires, comprehensively determines the coating adhesion performance level, generates a dedicated test report, and completes the testing operation.

[0038] This invention innovatively adopts a single-station integrated testing structure, completely revolutionizing the traditional split-type, multi-process, and multi-clamping testing mode. Through the synergistic cooperation of a compensable winding structure, a closed-loop constant-pressure paint scraping structure, an electrolyte micro-etching and marking structure, and an automated visual inspection structure, it not only solves the core problems of low efficiency, large positioning errors, and poor data consistency in traditional testing, but also specifically addresses various practical challenges such as sample breakage, poor paint scraping accuracy, missed detection of minor defects, easy equipment contamination, and strong subjectivity in manual testing. This invention is adaptable to the testing of enameled wires of different diameters and paint film specifications, offering strong versatility, high automation, and accurate and standardized testing data. It can meet the needs of batch industrial quality inspection and high-precision sampling inspection, possessing excellent practicality and market promotion value.

[0039] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the invention and are not intended to limit it. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the invention, but such modifications, substitutions, and variations are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A device for testing the coating adhesion performance of enameled wire, comprising a workbench (1), a chassis (2), and a panel (3), wherein the chassis (2) is fixedly disposed on the rear side of the workbench (1), and a controller (301) is mounted on the panel (3), characterized in that: The workbench (1) is equipped with a clamping and torsion mechanism that can move synchronously in opposite directions, used to clamp the enameled wire and drive the enameled wire to rotate. The chassis (2) is respectively equipped with a winding mandrel assembly (4), a sliding variable pressure paint scraping detection mechanism (5), and a movable vision detection assembly; The winding mandrel assembly (4) has a telescopic displacement and detachable shaft replacement structure for winding enameled wire samples. The clamping torsion mechanism can move synchronously in opposite directions with the winding action of the enameled wire, dynamically compensate for the winding length of the enameled wire, and prevent the enameled wire from being stretched and broken. The variable pressure paint scraping detection mechanism (5) is equipped with a pressure adjustable paint scraping structure and an electrolyte spraying trace detection structure; The controller (301) electrically links all mechanisms to work together to complete the enameled wire winding, twisting, constant pressure scraping, micro-etching and visual defect detection operations in the same workstation.

2. The paint film adhesion performance detection device for an enameled wire according to claim 1, characterized by The clamping and torsion mechanism includes a synchronous lead screw transmission mechanism (101), a linear sliding guide rail (106), and two symmetrically arranged brackets (102). The synchronous lead screw transmission mechanism (101) adopts a bidirectional lead screw drive structure. The brackets (102) on both sides are slidably mounted on the linear sliding guide rail (106). The brackets (102) are equipped with corresponding fixed clamping chucks (103), torsion drive devices (104), and rotating clamping chucks (105).

3. The device for detecting the adhesion of the enamel film of the enameled wire according to claim 1, characterized in that, The winding mandrel assembly (4) includes a motor output end (401), a sleeve (402) and a detachable winding shaft (403). The motor output end (401) can be extended and retracted as a whole. The sleeve (402) is fixedly installed at the end of the motor output end (401). The detachable winding shaft (403) is detachably inserted into the sleeve (402) and has a long groove structure in the middle for inserting the enameled wire sample.

4. The paint film adhesion performance detection device for an enameled wire according to claim 1, characterized by The variable pressure paint scraping detection mechanism (5) includes a horizontal sliding arm (501), a mounting frame (502), a servo electric cylinder (503), a paint scraper (504), an electrolyte storage tank (505), a pressurizing pump (506), and a micro spray valve (507). The horizontal sliding arm (501) is slidably embedded in the sliding groove on the front of the chassis (2). The mounting frame (502) is telescopically mounted on the horizontal sliding arm (501). The servo electric cylinder (503) is vertically fixed to the top of the mounting frame (502). The output end of the servo electric cylinder (503) is equipped with a pressure sensor (508). The bottom end of the pressure sensor (508) is fixedly connected to the paint scraper (504).

5. The device for detecting the adhesion of the enamel film of the enameled wire according to claim 4, characterized in that, The pressure sensor (508) is sandwiched between the servo electric cylinder (503) and the paint scraper (504), and is assembled with the servo electric cylinder (503) to form a pressure adjustable assembly structure.

6. The paint film adhesion performance detection device for an enameled wire according to claim 4, characterized by Two sets of limiting slide rods are provided through the mounting bracket (502). The bottom end of the limiting slide rod is fixedly connected to the mounting seat of the paint scraper (504). The limiting slide rod and the mounting bracket (502) slide together, limiting the movement trajectory of the paint scraper (504) to vertical lifting.

7. The device for detecting the adhesion of the enamel film of the enameled wire according to claim 1, characterized in that, The visual inspection component includes a horizontal guide rail (202), a visual sensor (203), and a ring-shaped shadowless fill light (204). The horizontal guide rail (202) is fixedly mounted on the bottom of the top frame (201) of the chassis (2). The visual sensor (203) is slidably mounted on the horizontal guide rail (202). The ring-shaped shadowless fill light (204) is fixedly mounted on the lens end of the visual sensor (203).

8. The device for testing the coating adhesion performance of enameled wire according to claim 4, characterized in that, The electrolyte storage tank (505), the pressurizing pump (506), and the micro spray valve (507) are connected in sequence, and the spray nozzle of the micro spray valve (507) is set towards the detection area of ​​the enameled wire sample. An L-frame is fixedly installed at the bottom of the electrolyte storage tank (505), and a liquid collection tank (6) is fixedly installed on the L-frame. The liquid collection tank (6) is located below the enameled wire detection area and directly below the micro spray valve (507).

9. The device for testing the coating adhesion performance of enameled wire according to claim 1, characterized in that, The panel (3) is also equipped with an indicator light (302), which is electrically connected to the controller (301).

10. A method for testing the coating adhesion performance of enameled wire based on the apparatus described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Sample clamping: Clamp both ends of the enameled wire sample between the fixed clamping head and the rotating clamping head respectively to complete the coaxial positioning installation. S2, Winding Compensation Operation: Control the extension and retraction of the winding mandrel assembly so that the detachable winding shaft can be inserted into the enameled wire sample and rotated and wound. The synchronous screw transmission mechanism drives the two side supports to move closer to each other to compensate for the winding length of the enameled wire. S3. Torsion test: The torsion drive device rotates the enameled wire sample a preset number of times; S4. Constant pressure scraping operation: Control the variable pressure scraping detection mechanism to slide to the detection station, and the servo electric cylinder, in conjunction with the pressure sensor, adjusts the downward pressure to perform axial scraping on the surface of the enameled wire. S5. Micro-etching and waste liquid collection: The pressurizing pump pressurizes the electrolyte storage tank, so that the electrolyte is sprayed through the micro-spray valve to the enameled wire detection area. The liquid collection tank installed on the L frame receives the sprayed waste liquid. S6. Visual inspection operation: The horizontal guide rail moves the visual sensor to the inspection area, and the ring shadowless supplementary light completes the defect image acquisition. S7. Data rating output: The controller determines the coating adhesion performance level of the enameled wire based on the test data and generates a test report.

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