An enamelled wire winding abrasion resistance tester and a testing method

Abstract

An enamelled wire winding abrasion resistance tester and a testing method belong to the technical field of enamelled wire abrasion resistance testing. The tester includes a test bench, a wire winding device, a movable pressing device and a steering device. A relay, a controller, a loop power supply and a driving device are arranged in the test bench. The enamelled wire is connected to the relay and the loop power supply through the wire winding device, and the relay is electrically connected to the driving device through the controller. The beneficial effects of the present invention are as follows: by winding the enamelled wire and rubbing it back and forth to simulate the stress situation of the stator winding, and evaluating the abrasion resistance performance of the enamelled wire by the number of back-and-forth rubs when the enamelled wire is worn through, the abrasion resistance performance of the enamelled wire is quantified. When the enamelled wire is worn through, an automatic alarm is given, realizing the automation of the test, improving the reliability of the test results, ensuring the quality after the motor is assembled, and reducing the failure rate of the motor operation.

Description

Technical Field

[0001] The present invention relates to the technical field of abrasion resistance testing of enameled wires, and particularly to an enameled wire winding abrasion resistance tester and a testing method. Background Art

[0002] As is well known, an electric motor is an important component in a transmission and control system. With the development of modern science and technology, the focus of the practical application of electric motors has begun to shift from simple transmission in the past to complex control; especially the precise control of the speed, position, and torque of electric motors. The stator of an electric motor is an important component.

[0003] The stator is composed of a stator core and a stator winding. The main function of the stator is to generate a rotating magnetic field; the stator winding is a winding installed on the stator core, that is, an enameled wire coil wound around the stator core. A winding is a general term for a single-phase or entire electromagnetic circuit composed of multiple enameled wire coils or coil groups. The stator core of a traditional electric motor is integral, and generally made into an embedded winding. After the winding is installed on the stator core, it needs to be assembled into the motor housing, and then the rotor is assembled into the installation cavity of the stator core. During the winding process of the winding and the assembly of the motor, the stator winding will come into contact and friction with the stator core, the inner wall of the motor housing, and the outer surface of the rotor to varying degrees. If the wear resistance of the winding coil is poor and friction and wear occur during the installation process, it will affect the working performance of the entire motor, and even result in installation scrap.

[0004] Therefore, how to evaluate the abrasion resistance after winding of the motor winding before installation is the key to improving the quality of servo motors and reducing the failure rate. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides an enameled wire winding abrasion resistance tester. By automatically rubbing the enameled wire back and forth after winding to simulate the stress conditions of the stator winding during the winding process and the motor assembly process, and evaluating the abrasion resistance of the enameled wire after winding by the number of back-and-forth rubs when the enameled wire is worn through, the abrasion resistance of the enameled wire is quantified, the reliability of the test results is improved, the quality of the assembled motor is guaranteed, and the failure rate is reduced.

[0006] To achieve the above object, the technical solution adopted by the present invention to solve its technical problems is as follows: The enameled wire winding wear resistance tester includes a test bench and a wire winding device, a movable pressing device, and a steering device provided thereon. The movable pressing device and the steering device are respectively arranged at both ends of the test bench. The middle part of the enameled wire is wound and connected to the wire winding device. The two ends of the enameled wire are respectively pressed and positioned by the movable pressing device and then led out of the test bench by the steering device. The two ends of the enameled wire extending out of the test bench are respectively hung with load weights. A relay, a controller, a circuit power supply, and a driving device for sliding the wire winding device back and forth along the length direction of the test bench are arranged in the test bench. The enameled wire is connected to the relay and the circuit power supply through the wire winding device. The relay is electrically connected to the driving device through the controller.

[0007] Further, a strip-shaped groove is arranged along the length direction of the test bench. The wire winding device is slidably connected in the strip-shaped groove. The driving device is set as a linear module. The slide table on the linear module is fixedly connected to the wire winding device.

[0008] Further, strip-shaped brushes are respectively fixed on both sides of the strip-shaped groove, and the two strip-shaped brushes cover the strip-shaped groove. A dust-proof cover hinged to the test bench is also arranged on one side of the strip-shaped groove, and the dust-proof cover covers the strip-shaped groove and the wire winding device.

[0009] Further, a counter and an alarm are also arranged in the test bench. Travel switches are respectively arranged at both ends of the driving device. The travel switches are connected in series with the counter and then electrically connected to the driving device through the controller. The relay is electrically connected to the driving device and the alarm through the controller.

[0010] Further, the wire winding device includes a vertical plate and a guide wheel assembly and a wire winding column arranged thereon. The wire winding column is fixed in the middle of the vertical plate, and the guide wheel assemblies are respectively arranged on both sides of the wire winding column.

[0011] Further, the guide wheel assembly includes a conductive grooved wheel I and a conductive grooved wheel II arranged in an alternating manner. Clamping grooves with upper openings and fixed mounting holes are arranged on both sides of the upper end of the vertical plate. The conductive grooved wheel I is fixed in the fixed mounting hole through a connecting bolt I. The conductive grooved wheel II is slidably connected up and down in the clamping groove through a fixing block and a connecting bolt II.

[0012] Further, the connecting bolt I is connected to the connecting bolt II through a connecting spring. After the vertical plate is connected to the circuit power supply, it is grounded. The connecting bolts I on both sides of the vertical plate are connected through wires and then connected to the relay. The relay is grounded.

[0013] Further, the movable pressing device includes a fixed seat, a mounting plate, a pressing wheel and a pressing rod. The fixed seat is fixed on the test bench. A wire pressing groove is provided at the upper end of the fixed seat. The mounting plate is fixed on one side of the wire pressing groove. The mounting plate is rotationally connected to the eccentric part of the pressing wheel. The pressing rod is connected to the outer periphery of the pressing wheel.

[0014] Further, the steering device includes a steering column and a steering arm. The steering column includes a fixed column and a steering grooved wheel. The fixed column is fixed on the test bench. The top end of the fixed column is axially connected to the steering grooved wheel. The groove of the steering grooved wheel is at the same height as the wire pressing groove. The steering arm includes an L-shaped bracket and a supporting grooved wheel. One end of the L-shaped bracket is fixed on the test bench. The other end of the L-shaped bracket is arranged upward and extends out of the test bench and is connected to the supporting grooved wheel. The axis of the supporting grooved wheel is perpendicular to the axis of the steering grooved wheel.

[0015] A method for testing the abrasion resistance of enameled wire winding, using the enameled wire winding abrasion resistance tester as described above, includes the following steps:

[0016] 1) Wind the middle part of the enameled wire around the winding device. After both ends of the enameled wire are pressed by the movable pressing devices at both ends of the test bench, lead both ends of the enameled wire out of the test bench through the steering device, and hang load weights at both ends of the enameled wire for traction and straightening.

[0017] 2) Set the upper limit of the number of times the winding device slides back and forth on the test bench in the controller. The driving device operates to drive the winding device to slide back and forth along the length direction of the test bench. The counter records the number of times the winding device slides back and forth on the test bench. During the sliding, if the surface of the enameled wire is worn through to make the circuit composed of the relay and the circuit power supply conductive, the suction signal of the relay is transmitted to the controller. The controller controls the driving device to stop running and at the same time makes the alarm sound. If the surface of the enameled wire is not worn through all the time, until the number of times the winding device slides back and forth on the test bench reaches the set upper limit, the controller controls the driving device to stop running.

[0018] 3) After the test is completed, remove the load weights, take off the enameled wire, return the driving device to its original position, and rotate the dust cover to cover the strip-shaped groove and the winding device.

[0019] The beneficial effects of the present invention are:

[0020] 1. In the present invention, an enameled wire is wound around a winding device. After the two ends of the enameled wire are pressed tightly by the movable pressing devices at both ends of the test bench, the two ends of the enameled wire are led out of the test bench through a steering device, and load weights are hung at the two ends of the enameled wire for traction and straightening. The driving device drives the winding device to slide back and forth along the length direction of the test bench, realizing the simulation of the stress conditions during the stator winding winding process and the motor assembly process. When the enameled wire is worn through, the test circuit composed of a relay and a loop power supply is conducted, and the signal of the relay contact closing is transmitted to the controller. The controller controls the driving device to stop. By counting the number of back-and-forth frictions when the enameled wire is worn through, the wear resistance of the enameled wire after winding is evaluated, the wear resistance of the enameled wire is quantified, the reliability of the test results is improved, the quality of the assembled motor is ensured, and the failure rate is reduced.

[0021] 2. Specifically, a counter and an alarm are also arranged inside the test bench, and travel switches are arranged at both ends of the driving device. When the driving device works to drive the winding device to slide back and forth along the length direction of the test bench, the winding device touches the travel switch to make its contact actuate to provide a pulse signal to the counter. The counter automatically records the number of times the winding device slides back and forth on the test bench, making the counting more accurate. If the surface of the enameled wire is worn through to conduct the circuit composed of the relay and the loop power supply, the closing signal of the relay is transmitted to the controller. While the controller controls the driving device to stop running, the alarm gives an alarm, reminding the tester that the enameled wire has been worn through, realizing the fully automated operation of the test process, improving the test efficiency, and improving the reliability of the test results.

[0022] 3. Specifically, the winding device includes a vertical plate, a guide wheel assembly, and a winding column. The enameled wire is wound around the winding column, and the enameled wire is pulled and straightened through the guide wheel assemblies on both sides and the circuit connection with the relay and the loop power supply is completed to form a test circuit. Moreover, the guide wheel assembly is composed of a conductive grooved wheel Ⅰ and a conductive grooved wheel Ⅱ arranged alternately, preventing the enameled wire from warping. The conductive grooved wheel Ⅰ is fixedly installed on the vertical plate, and the conductive grooved wheel Ⅱ is clamped in the clamping groove. The enameled wire can be placed therein for positioning and traction by lifting the conductive grooved wheel Ⅱ upward, which is convenient for operation. For the movable pressing, the enameled wire can be placed in the pressing wire groove of the fixed seat by lifting the pressing rod. After putting down the pressing rod, the enameled wire is pressed and positioned by the eccentric rotation of the pressing wheel, making the pressing and positioning operation of the enameled wire convenient.

[0023] In summary, the present invention simulates the stress conditions during the stator winding winding process and the motor assembly process by winding the enameled wire and rubbing it back and forth, evaluates the wear resistance of the enameled wire after winding by the number of back-and-forth frictions when the enameled wire is worn through, quantifies the wear resistance of the enameled wire, gives an automatic alarm when the enameled wire is worn through, realizes the automation of the test, improves the reliability of the test results, ensures the quality of the assembled motor, and reduces the failure rate of the motor operation. Description of the Drawings

[0024] Brief descriptions are given below to the content expressed by each drawing in the specification of the present invention and the marks in the drawings:

[0025] Figure 1 It is the front view of the enameled wire winding abrasion resistance tester in the present invention;

[0026] Figure 2 It is Figure 1 the top view of;

[0027] Figure 3 It is Figure 2 the structural schematic diagram of the intermediate frequency amplification part in;

[0028] Figure 4 It is the control schematic diagram of the enameled wire winding abrasion resistance tester in the present invention;

[0029] Figure 5 It is the test circuit for the enameled wire film to be worn through and conduct electricity in the present invention;

[0030] The marks in the above-mentioned drawings are all: 1. test bench, 2. wire winding device, 21. vertical plate, 211. clamping groove, 212. fixed mounting hole, 22. guide wheel assembly, 221. conductive grooved wheel I, 222. conductive grooved wheel II, 23. wire winding column, 3. movable pressing device, 31. fixed seat, 311. wire pressing groove, 32. mounting plate, 33. pressing wheel, 34. pressing rod, 4. steering device, 41. steering column, 411. fixed column, 412. steering grooved wheel, 42. steering arm, 421. L-shaped bracket, 422. supporting grooved wheel, 5. relay, 6. controller, 7. loop power supply, 8. driving device, 9. load weight, 10. strip groove, 11. strip brush, 12. dust cover, 13. counter, 14. alarm, 15. travel switch. Detailed Embodiments

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0032] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The specific implementation of the present invention is as follows: As Figure 1 and Figure 2 shown, an enameled wire winding abrasion resistance tester includes a test bench 1 and a wire winding device 2, a movable pressing device 3, and a steering device 4 arranged thereon. The movable pressing device 3 and the steering device 4 are respectively arranged at both ends of the test bench 1. The middle part of the enameled wire is wound and connected to the wire winding device 2. The two ends of the enameled wire are respectively pressed and positioned by the movable pressing device 3 and then led out of the test bench 1 by the steering device 4. Load weights 9 are respectively hung at the two ends of the enameled wire extending out of the test bench 1, thus completing the winding, straightening, and positioning of the enameled wire; a relay 5, a controller 6, a loop power supply 7, and a driving device 8 for sliding the wire winding device 2 back and forth along the length direction of the test bench 1 are arranged inside the test bench 1. The controller 6 therein can use a PLC. The enameled wire is connected to the input end of the relay 5 and the loop power supply 7 through the wire winding device 2 to form a test loop. The output end of the relay 5 is electrically connected to the driving device 8 through the controller 6. When the paint film of the enameled wire is worn through, the above test loop is conducted, causing the contacts of the relay 5 to be attracted and generating a connection signal, which is transmitted to the controller 6. The controller 6 controls the driving device 8 to stop, and counts the number of back-and-forth frictions when the paint film of the enameled wire is worn through, so as to evaluate the abrasion resistance of the enameled wire after winding, quantify the abrasion resistance of the enameled wire, improve the reliability of the test results, ensure the quality of the motor after assembly, and reduce the failure rate.

[0034] Specifically, as Figure 2 shown, a strip groove 10 is arranged along the length direction on the test bench 1, and the above-mentioned wire winding device 2 is slidably connected in the strip groove 10. The driving device 8 is set as a linear module, and the linear module is driven by the forward and reverse rotation of a servo motor to drive the slide table thereon to slide back and forth along the guide rail. The slide table is fixedly connected to the wire winding device 2. By the forward and reverse rotation of the servo motor, the wire winding device 2 can be driven to slide back and forth in the strip groove 10. In order to ensure that the wire winding device 2 automatically slides back and forth in the strip groove 10, travel switches 15 are respectively arranged at both ends of the driving device 8. The travel switches 15 are electrically connected to the servo motor in the driving device 8 through the controller 6. When the wire winding device 2 runs to both ends of the driving device 8, it will touch the travel switches 15, and the position signals generated by the travel switches 15 are transmitted to the controller 6. The controller 6 controls the servo motor to reverse, thereby driving the wire winding device 2 to run in the opposite direction, thus realizing the automatic back-and-forth sliding of the wire winding device 2 in the strip groove 10.

[0035] In addition, as Figure 4As shown in the figure, a counter 13 and an alarm 14 are also provided in the test bench 1. The travel switch 15 therein is connected in series with the counter 13. The winding device 2 touches the travel switch 15 to make its contact act and provide a pulse signal to the counter 13. The counter 13 automatically records the number of times the winding device 2 slides back and forth on the test bench 1, making the counting more accurate. After the travel switch 15 and the counter 13 are connected in series, they are electrically connected to the drive device 8 through the controller 6. The relay 5 is electrically connected to the drive device 8 and the alarm 14 through the controller 6. The working signal of the alarm 14 is triggered by the contact suction of the relay 5. That is, when the paint film of the enameled wire is worn through, the test circuit is turned on, causing the contact of the relay 5 to be suctioned to generate a connection signal and transmit the signal to the controller 6. While controlling the drive device 8 to stop, the controller 6 controls the alarm 14 to give an audible alarm, reminding the tester that the enameled wire has been worn through, realizing the full-automatic operation of the test process, improving the test efficiency, and improving the reliability of the test results. In addition, a speed adjustment knob for controlling the back-and-forth sliding speed of the winding device 2 is provided on the test bench 1. The speed adjustment knob is electrically connected to the servo motor through the above-mentioned controller 6, and can simulate the friction performance at different speeds, making the test more comprehensive.

[0036] Specifically, as Figure 2 shown, strip brushes 11 are respectively fixed on both sides of the strip groove 10. The two strip brushes 11 cover the strip groove 10, reducing the entry of dust and foreign objects into the test bench 1, reducing the maintenance cost, and increasing the service life of the entire tester; a dust-proof cover 12 hinged to the test bench 1 is also provided on one side of the strip groove 10. The dust-proof cover 12 covers the strip groove 10 and the winding device 2. When not in use, the dust-proof cover 12 can be rotated and buckled above the strip groove 10 and the winding device 2 to further prevent the entry of dust and foreign objects.

[0037] Specifically, as Figure 3As shown in the figure, the winding device 2 includes a vertical plate 21, a guide wheel assembly 22 and a winding column 23 arranged thereon. The winding column 23 is fixed in the middle of the vertical plate 21, and a limit stop block is arranged at the end of the winding column 23, preventing the vertical plate 21 from sliding back and forth after winding on the winding column 23 and causing the enameled wire to slip, which affects the test process. Guide wheel assemblies 22 are respectively arranged on both sides of the winding column 23 for pulling and straightening the enameled wire. The guide wheel assembly 22 includes a conductive grooved pulley I 221 and a conductive grooved pulley II 222 arranged in an alternating manner, preventing the enameled wire from warping after being introduced between the conductive grooved pulley I 221 and the conductive grooved pulley II 222. Clamping grooves 211 with open upper ends and fixed mounting holes 212 are arranged on both sides of the upper end of the vertical plate 21. The conductive grooved pulley I 221 is fixed in the fixed mounting hole 212 through a connecting bolt I, and the conductive grooved pulley II 222 is connected to the clamping groove 211 through a fixed block and a connecting bolt II in a vertically sliding manner. The enameled wire can be placed therein for positioning and traction by lifting the conductive grooved pulley II 222 upward, which is more convenient to operate. The connecting bolt I is connected to the connecting bolt II through a connecting spring, preventing the conductive grooved pulley II 222 from disengaging from the clamping groove 211 when the conductive grooved pulley II 222 is lifted upward. The vertical plate 21 is connected to the loop power supply 7 and then grounded. The connecting bolts I on both sides of the vertical plate 21 are connected through wires and then connected to the relay 5. The relay 5 is grounded, thus forming a test loop.

[0038] Specifically, as Figure 1 and Figure 2 shown, the movable pressing device 3 includes a fixed seat 31, a mounting plate 32, a pressing wheel 33 and a pressing rod 34. The fixed seat 31 is fixed on the test bench 1, and a wire pressing groove 311 is arranged at the upper end of the fixed seat 31. The mounting plate 32 is fixedly connected to one side of the wire pressing groove 311. The mounting plate 32 is rotationally connected to the eccentric part of the pressing wheel 33. A pressing rod 34 is connected to the outer circumference of the pressing wheel 33. In the normal state, the pressing wheel 33 is in contact with the wire pressing groove 311. The pressing wheel 33 can be disengaged from the wire pressing groove 311 by lifting the pressing rod 34, which is convenient for placing the enameled wire into the wire pressing groove 311.

[0039] Specifically, as Figure 1 and Figure 2As shown in the figure, the steering device 4 includes a steering column 41 and a steering arm 42. The steering column 41 includes a fixed column 411 and a steering grooved pulley 412. The fixed column 411 is fixed on the test bench 1. The top end of the fixed column 411 is axially connected to the steering grooved pulley 412. The groove of the steering grooved pulley 412 is at the same height as the wire pressing groove 311, ensuring that the enameled wire will not skew during steering. The steering arm 42 includes an L-shaped bracket 421 and a supporting grooved pulley 422. One end of the L-shaped bracket 421 is fixed on the test bench 1. The other L-shaped end is arranged upward and extends out of the test bench 1 and is connected to the supporting grooved pulley 422. The axis of the supporting grooved pulley 422 is perpendicular to the axis of the steering grooved pulley 412, so that the end of the enameled wire faces downward after passing through the steering grooved pulley 412 and the supporting grooved pulley 422 in sequence, so that the enameled wire can be straightened after hanging the load weight 9.

[0040] The test method for the winding abrasion resistance of the enameled wire using the above tester includes the following steps:

[0041] 1) Wind the middle part of the enameled wire around the winding column 23 of the winding device 2, and lift the conductive grooved pulley II 222 upward so that the conductive grooved pulley II 222 is separated from the conductive grooved pulley I 221 by a certain distance. Place the enameled wire in the groove at the upper end of the conductive grooved pulley I 221, and lower the conductive grooved pulley II 222 so that the groove at its lower end contacts the enameled wire, and straighten the enameled wire by traction. Hold the pressure rod 34 and rotate the pressure wheel 33 to lift the pressure wheel 33 upward so that the pressure wheel 33 is separated from the wire pressing groove 311 by a certain distance. Place the enameled wire into the wire pressing groove 311, rotate the pressure wheel 33 in the reverse direction and let go to make the pressure wheel 33 press the enameled wire tightly in the wire pressing groove 311, then the pressing and positioning of the enameled wire is completed. The end of the enameled wire turns after passing around the steering grooved pulley 412, and then passes around the supporting grooved pulley 422 and then leads the two ends of the enameled wire out of the test bench 1, and then hang the load weights 9 at both ends of the enameled wire for traction and straightening, then the tensioning and positioning of the enameled wire is completed.

[0042] 2) Set the upper limit of the number of times the winding device 2 slides back and forth on the test bench 1 in the controller 6. The servo motor in the driving device 8 operates to drive the vertical plate 21 in the winding device 2 to slide back and forth along the strip groove 10. When the vertical plate 21 touches the travel switch 15 at both ends of the winding device 2, a pulse signal is generated, and the counter 13 counts once. The counter 13 records in real time the number of times the winding device 2 slides back and forth on the test bench 1. During the sliding, if the surface paint film of the enameled wire is worn through to make the circuit composed of the relay 5 and the loop power supply 7 conduct, the suction signal of the relay 5 is transmitted to the controller 6. The controller 6 controls the driving device 8 to stop running and at the same time makes the alarm 14 alarm, indicating that the enameled wire does not meet the current test requirements for the winding wear resistance; if the surface of the enameled wire has not been worn through, until the number of times the winding device 2 slides back and forth on the test bench 1 reaches the set upper limit, the controller 6 controls the driving device 8 to stop running, indicating that the enameled wire meets the current test requirements for the winding wear resistance;

[0043] 3) After the test is completed, remove the load weight 9, take off the enameled wire, press the reset button on the test bench 1 to make the driving device 8 return to its original position, and rotate the dust cover 12 to cover the strip groove 10 and the winding device 2.

[0044] In summary, the present invention simulates the stress conditions of the stator winding during the winding process and the motor assembly process by winding the enameled wire and rubbing it back and forth, evaluates the wear resistance of the enameled wire after winding by the number of times of back-and-forth rubbing when the enameled wire is worn through, quantifies the wear resistance of the enameled wire, automatically alarms when the enameled wire is worn through, realizes the automation of the test, improves the reliability of the test results, ensures the quality of the motor after assembly, and reduces the failure rate of the servo motor operation.

[0045] As described above, only some principles of the present invention are illustrated by diagrams. This specification is not intended to limit the present invention to the specific structures and application scopes shown and described. Therefore, all possible corresponding modifications and equivalents that can be utilized belong to the scope of the patent applied for by the present invention.

Claims

1. An enamelled wire winding abrasion resistance tester, characterized in that, It includes a test bench (1), a wire winding device (2), a movable pressing device (3) and a steering device (4) arranged thereon. The movable pressing device (3) and the steering device (4) are respectively arranged at both ends of the test bench (1). The middle part of the enameled wire is wound and connected to the wire winding device (2). The two ends of the enameled wire are respectively pressed and positioned by the movable pressing device (3) and then led out of the test bench (1) by the steering device (4). The two ends of the enameled wire extending out of the test bench (1) are respectively hung with load weights (9); A relay (5), a controller (6), a loop power supply (7) and a driving device (8) for sliding the wire winding device (2) back and forth along the length direction of the test bench (1) are arranged in the test bench (1). The enameled wire is connected to the relay (5) and the loop power supply (7) through the wire winding device (2). The relay (5) is electrically connected to the driving device (8) through the controller (6); A strip groove (10) is arranged on the test bench (1) along its length direction. The wire winding device (2) is slidably connected in the strip groove (10). The driving device (8) is arranged as a linear module. The slide table on the linear module is fixedly connected to the wire winding device (2); Strip brushes (11) are respectively fixed on both sides of the strip groove (10). The two strip brushes (11) cover the strip groove (10); A dust-proof cover (12) hinged to the test bench (1) is also arranged on one side of the strip groove (10). The dust-proof cover (12) covers above the strip groove (10) and the wire winding device (2); A counter (13) and an alarm (14) are also arranged in the test bench (1). Travel switches (15) are respectively arranged at both ends of the driving device (8). The travel switches (15) are connected in series with the counter (13) and then electrically connected to the driving device (8) through the controller (6). The relay (5) is electrically connected to the driving device (8) and the alarm (14) through the controller (6).

2. The enamelled wire winding abrasion resistance tester according to claim 1, wherein: The wire winding device (2) includes a vertical plate (21), a guide wheel assembly (22) and a wire winding column (23) arranged thereon. The wire winding column (23) is fixed in the middle of the vertical plate (21). The guide wheel assemblies (22) are respectively arranged on both sides of the wire winding column (23).

3. The enamelled wire winding abrasion resistance tester according to claim 2, characterized in that: The guide wheel assembly (22) includes a conductive grooved pulley I (221) and a conductive grooved pulley II (222) arranged alternately. Clamping grooves (211) with upper ends open and fixed mounting holes (212) are arranged on both sides of the upper end of the vertical plate (21). The conductive grooved pulley I (221) is fixed in the fixed mounting hole (212) through a connecting bolt I. The conductive grooved pulley II (222) is slidably connected up and down in the clamping groove (211) through a fixing block and a connecting bolt II.

4. The enameled wire winding wear resistance tester according to claim 3, characterized in that: The connecting bolt I is connected to the connecting bolt II through a connecting spring. After the vertical plate (21) is connected to the loop power supply (7), it is grounded. The connecting bolts I on both sides of the vertical plate (21) are connected through wires and then connected to the relay (5). The relay (5) is grounded.

5. The enamelled wire winding abrasion resistance tester according to claim 2, wherein: The movable pressing device (3) includes a fixed seat (31), a mounting plate (32), a pressing wheel (33) and a pressing rod (34). The fixed seat (31) is fixed on the test bench (1). A wire pressing groove (311) is provided at the upper end of the fixed seat (31). The mounting plate (32) is fixed on one side of the wire pressing groove (311). The mounting plate (32) is rotatably connected to the eccentric part of the pressing wheel (33). The pressing rod (34) is connected to the outer periphery of the pressing wheel (33).

6. The enamelled wire winding abrasion resistance tester according to claim 5, characterized in that: The steering device (4) includes a steering column (41) and a steering arm (42). The steering column (41) includes a fixed column (411) and a steering grooved wheel (412). The fixed column (411) is fixed on the test bench (1). The top end of the fixed column (411) is axially connected to the steering grooved wheel (412). The groove of the steering grooved wheel (412) is at the same height as the wire pressing groove (311). The steering arm (42) includes an L-shaped bracket (421) and a supporting grooved wheel (422). One end of the L-shaped bracket (421) is fixed on the test bench (1). The other end of the L-shaped bracket (421) is arranged upward and extends out of the test bench (1) and is connected to the supporting grooved wheel (422). The axis of the supporting grooved wheel (422) is perpendicular to the axis of the steering grooved wheel (412).

7. A method for testing the abrasion resistance of enameled wire winding, which uses the enameled wire winding abrasion resistance tester described in any one of claims 1 to 6, and is characterized in that: It includes the following steps: 1) Wind the middle part of the enameled wire around the winding device (2). After both ends of the enameled wire are pressed by the movable pressing devices (3) at both ends of the test bench (1), lead both ends of the enameled wire out of the test bench (1) through the steering device (4), and hang load weights (9) at both ends of the enameled wire for traction and straightening; 2) Set the upper limit of the number of times the winding device (2) slides back and forth on the test bench (1) in the controller (6). The driving device (8) works to drive the winding device (2) to slide back and forth along the length direction of the test bench (1). The counter (13) records the number of times the winding device (2) slides back and forth on the test bench (1). During the sliding, if the surface of the enameled wire is worn out to make the circuit composed of the relay (5) and the circuit power supply (7) conduct, the suction signal of the relay (5) is transmitted to the controller (6). The controller (6) controls the driving device (8) to stop running and at the same time makes the alarm (14) give an alarm. If the surface of the enameled wire has not been worn out all the time, until the number of times the winding device (2) slides back and forth on the test bench (1) reaches the set upper limit, the controller (6) controls the driving device (8) to stop running; 3) After the test is completed, remove the load weights (9), take off the enameled wire, return the driving device (8) to its original position, and rotate the dust cover (12) to cover the strip-shaped groove (10) and the winding device (2).

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