Paint stripping control device and method of stator winding machine

Abstract

The invention discloses a paint stripping control device and method for a stator winding machine, and the device comprises a paying-off tensioning mechanism which is used for controlling the tightness of a wire rod, a paint stripping mechanism which is used for stripping paint from the wire rod, and a stator winding mechanism which is used for driving a stator to rotate so as to achieve the winding, and is characterized in that the device also comprises an outgoing line detection mechanism which is arranged at the front end of the paint stripping mechanism; the wire outlet detection mechanism comprises a pair of wire passing wheels and an encoder coaxially connected with one wire passing wheel, and when the wire is pulled to move, the wire passing wheels can be synchronously driven to rotate around the axes of the wire passing wheels; the device further comprises a control module arranged in the control box, the control module comprises a PLC and a high-speed counter, the high-speed counter is connected with the encoder to receive pulse signals, the PLC calculates the displacement of the wire rod according to the pulse signals and generates a paint stripping trigger instruction, high-precision self-adaptive compensation is achieved, and the problem that due to the fact that the number of layers of stator core laminations has deviation, the thickness of the wire rod is too large is solved. The problem that the initial position of paint stripping deviates from a design area is solved, and the process stability of winding is remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of motor manufacturing, and in particular to a paint stripping control device and method for a stator winding machine. Background Art

[0002] In the stator winding process, the paint needs to be stripped from the starting and ending ends of the enameled wire for conductive connection. In traditional winding machines, the paint stripping position of the paint stripping mechanism usually relies on fixed parameter control, but in actual production, due to the deviation in the number of stator core lamination layers, the actual length of the wire after winding deviates from the preset value, which causes the starting position of the paint stripping to deviate from the designed area. This deviation will cause many problems in the subsequent assembly process. For example, after the stator winding is completed, it needs to be assembled with other components. Inaccurate paint stripping position will cause inconsistent position and length of winding leads. During the assembly process, these inconsistent leads may not be accurately connected to other components. Additional adjustments or corrections are required in production, which increases the difficulty and time of assembly and reduces production efficiency. In severe cases, it may also cause the lead to be unable to be installed, resulting in product scrapping. In addition, if the paint stripping length is too short, it may also cause insufficient contact area between the wire and the terminal (such as welding point or plug terminal) in the subsequent assembly, increase contact resistance, cause local heating, and even desoldering or disconnection; if the paint stripping length is too long, it may cause the exposed conductor to contact with other components, causing a short circuit risk.

[0003] The Chinese patent CN222283038U discloses a block-type stator winding machine, and specifically discloses that "the copper wire is connected to the tensioner and the wire wheel in sequence from the outlet of the wire barrel, and then enters the paint stripping mechanism to strip the paint. The tension of the copper wire is adjusted by the cooperation of the wire wheel and the tensioner, so that the copper wire is at a suitable tension level, so as to avoid the copper wire being disconnected due to being too tight or the copper wire being too loose causing the winding to be knotted, which affects the winding quality." It also discloses that "a wire nozzle and a paint stripping mechanism are arranged on the side of the main shaft mechanism, and the copper wire passes through the paint stripping mechanism and the wire nozzle in sequence. The paint stripping mechanism is used to strip the paint from the head end and tail end of the copper wire that needs to be wound on the block stator, and the head end of the copper wire after the paint is stripped passes through the wire nozzle, and the head end of the copper wire passes through the wire nozzle and is wound on the block stator, and the block stator is driven to rotate by the main shaft mechanism, thereby completing the winding of the block stator." It also discloses that "the main shaft mechanism is rotated to drive multiple block stators to rotate and wind at the same time, thereby improving the consistency and quality of the winding."

[0004] Although the above patent can realize the action of stripping the paint at the beginning and end of the wire when winding, and improve the consistency through multi-spindle synchronous winding, it still does not solve the problem of dynamic offset of the paint stripping position caused by the deviation of the number of laminated layers. Therefore, there is an urgent need for a device and method that can feedback the displacement of the wire in real time and dynamically correct the triggering time of paint stripping. Summary of the invention

[0005] The present invention aims to provide a paint stripping control device and method for a stator winding machine, so as to eliminate the paint stripping position deviation caused by the deviation of the number of lamination layers.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] The first aspect of the present invention discloses a paint stripping control device for a stator winding machine, comprising a wire-releasing tensioning mechanism for controlling the tightness of a wire, a paint stripping mechanism for stripping paint from the wire, and a stator winding mechanism for driving the stator to rotate to achieve winding. The device also comprises a wire-out detection mechanism arranged at the front end of the paint stripping mechanism, wherein the wire-out detection mechanism comprises a pair of wire-passing wheels, and an encoder coaxially connected to a wire-passing wheel, which can synchronously drive the wire-passing wheel to rotate around its own axis when the wire is pulled to move; the device also comprises a control module arranged in a control box, wherein the control module comprises a PLC and a high-speed counter, wherein the high-speed counter is connected to the encoder to receive a pulse signal, and the PLC calculates the wire displacement according to the pulse signal and generates a paint stripping trigger instruction.

[0008] Furthermore, the wire-out detection mechanism and the paint stripping mechanism are fixedly connected to a sliding member of an electric slide via a large transverse plate and driven by the electric slide, and the electric slide drives the sliding member to slide forward and backward along the wire conveying direction.

[0009] Furthermore, the wire outlet detection mechanism also includes a pneumatic slide, which drives a pair of the wire passing wheels to move toward or oppositely to achieve the clamping and loosening of the wire by the wire passing wheels.

[0010] Furthermore, a pair of line-passing wheels include a left line-passing wheel and a right line-passing wheel, the left line-passing wheel is fixedly connected to the left movable block through a left rotating shaft, the left movable block is fixedly connected to the left sliding block of the pneumatic slide, and the left line-passing wheel can rotate freely around the left rotating shaft; the right line-passing wheel is installed on the connecting member through the right rotating shaft, the connecting member is fixedly connected to the right movable block, and the right movable block is fixedly connected to the right sliding block of the pneumatic slide, and the connecting member is an inverted U-shaped block, the opening of the U-shaped block faces the left line-passing wheel, the bottom surface of the U-shaped block is fixedly connected to the right movable block, and the upper and lower ends of the U-shaped block are respectively provided with coaxial through holes that penetrate the U-shaped cavity in the vertical direction, the right rotating shaft can be rotatably installed in the hole, the output shaft end of the encoder is transmission-connected to the upper end of the right rotating shaft, and the rotation of the right line-passing wheel can drive the right rotating shaft and the encoder output shaft to rotate synchronously.

[0011] Furthermore, the surface of the wire passing wheel is provided with a coating, preferably a chrome coating or a ceramic coating, and the contact surface between the wire passing wheel and the wire is provided with a V-shaped groove structure.

[0012] The second aspect of the present invention also discloses a paint stripping control method for a stator winding machine, comprising the following steps:

[0013] S1. Start the winding machine, and the pneumatic slide drives the two wire-passing wheels to press the wire. Specifically, after starting the winding machine, the PLC first sends a command to the pneumatic slide, and the cylinder of the pneumatic slide starts to work, driving the two sliders to move toward each other, so that the wire-passing wheels installed on the sliders are close to each other, and finally the wire is pressed.

[0014] S2. The wire pulling process drives the wire wheel to rotate, and the encoder collects the wire wheel rotation angle signal in real time. Specifically, when the stator winding mechanism drives the stator to rotate and the wire tensioning mechanism conveys the wire, the friction between the wire and the wire wheel causes the wire wheel to rotate around its own axis. The encoder coaxially connected to the wire wheel collects the wire wheel rotation angle signal in real time, converts it into a pulse signal and sends it to the high-speed counter.

[0015] S3, the high-speed counter accumulates the encoder pulses and transmits them to the PLC. Specifically, after receiving the pulse signal sent by the encoder, the high-speed counter accumulates and counts the pulses, and continuously transmits the accumulated pulse number to the PLC;

[0016] S4, PLC calculates the number of revolutions of the wire wheel according to the number of pulses. Specifically, after receiving the number of pulses transmitted by the high-speed counter, PLC calculates the number of revolutions of the wire wheel according to the resolution of the encoder;

[0017] S5, PLC calculates the actual winding length of the stator according to the number of revolutions of the wire wheel;

[0018] S6. The PLC calculates the stator winding standard deviation based on the difference between the actual stator winding length and the standard stator winding length, and then determines and corrects the paint stripping trigger coordinates. Specifically, the PLC calculates the stator winding standard deviation based on the difference between the actual stator winding length and the standard stator winding length, and then determines the paint stripping trigger coordinates. The PLC controls the electric slide to drive the paint stripping mechanism to move and correct the paint stripping trigger coordinates.

[0019] S7. When the paint stripping mechanism reaches the corrected paint stripping trigger coordinates, the PLC generates a paint stripping trigger instruction to control the paint stripping mechanism to perform paint stripping operations on the wire. Specifically, when the electric slide drives the paint stripping mechanism to reach the corrected paint stripping trigger coordinates, the PLC generates a paint stripping trigger instruction and sends the instruction to the paint stripping mechanism. After receiving the instruction, the paint stripping mechanism immediately starts the paint stripping knife to strip the wire and remove the set length of paint on the surface of the wire.

[0020] S8. After the paint stripping is completed, the stator winding mechanism continues winding until the winding of the current stator is completed.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The encoder in the wire-out detection mechanism of the paint stripping control device of the stator winding machine provided by the present invention is coaxially connected to the wire-passing wheel, and can collect the rotation angle signal of the wire-passing wheel in real time and accurately. The control module is connected to the encoder through a high-speed counter, and the collected encoder signals are converted into pulse signals for accumulation and transmitted to the PLC. The PLC can accurately calculate the displacement of the wire based on these signals, accurately grasp the real-time position of the wire, and provide an accurate position basis for the paint stripping operation.

[0023] 2. The paint stripping control method of the stator winding machine provided by the present invention can realize dynamic correction of the paint stripping starting point coordinates. The PLC dynamically corrects the paint stripping trigger coordinates based on the difference between the actual measured winding length of the stator and the standard winding length of the stator. It ensures that the paint stripping position can be accurately determined under different usage conditions, and improves the accuracy and consistency of paint stripping.

[0024] 3. The wire-out detection mechanism and the paint stripping mechanism described in the present invention are fixedly connected to the sliding part of the electric slide through a transverse large plate and driven by the electric slide. First, the structural design of the paint stripping mechanism driven by the electric slide can realize the PLC to control the electric slide to timely adjust the paint stripping starting position according to the actual winding situation and the progress of the winding, thereby improving the continuity and efficiency of production; secondly, in the process of stator winding, due to the change of the winding position, the wire nozzle set at the outlet position of the paint stripping mechanism needs to follow the wire servo movement coordinate position along the wire pulling direction. At this time, the synchronous movement of the wire-out detection mechanism and the paint stripping mechanism can ensure that the wire does not bend and twist too much in the process of leading out from the wire tensioning device to entering the stator winding mechanism, thereby ensuring the accuracy of the wire displacement detection mechanism.

[0025] 4. The present invention drives a pair of wire-passing wheels to move toward or in the opposite direction through a pneumatic slide to achieve the compression or loosening of the wire by the wire-passing wheels, and can evenly distribute the pressure applied by the two wire-passing wheels to the wire. Such a design can ensure that the force of the wire is balanced between the wire-passing wheels, avoid the deviation or distortion of the wire due to uneven force, and thus ensure the transmission stability of the wire and the quality of paint stripping.

[0026] 5. The surface of the wire wheel disclosed in the present invention is provided with a coating, and the contact surface with the wire is a V-groove structure. The coating surface is relatively smooth and has high hardness and wear resistance. The design of the V-groove provides a good guiding effect for the wire, and also makes the contact surface with the wire larger, increasing the friction between the wire wheel and the wire. The combination of the two can not only ensure that the wire wheel has a longer service life and performance, but also ensure that the wire conveying is more uniform and accurate, making the encoder detection more reliable and stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1It is a schematic diagram of the layout of the paint stripping control device of the stator winding machine;

[0028] Figure 2 It is a schematic diagram of the layout of the outlet detection mechanism and the paint stripping mechanism;

[0029] Figure 3 This is a schematic diagram of the outlet detection mechanism;

[0030] Figure 4 The control method flow chart is shown in FIG.

[0031] Description of Figure Numbers:

[0032] 100. Pay-off tensioning mechanism;

[0033] 200, outlet detection mechanism; 201, pneumatic slide; 202, left slider; 203, right movable block; 204, left movable block; 205, left rotating shaft; 206, left wire wheel; 207, right wire wheel; 208, connecting piece; 209, encoder; 210, right slider 300, paint stripping mechanism;

[0034] 400, stator winding mechanism;

[0035] 501, electric slide; 502, sliding member; 503, transverse large plate; 504, first adapter plate; 505, second adapter plate. DETAILED DESCRIPTION

[0036] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings, but the present invention is not limited to these implementation modes, and any improvement or substitution based on the basic spirit of the present embodiment still falls within the scope of protection required by the claims of the present invention.

[0037] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” are relative relationships and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0038] See also Figure 1-3The present embodiment provides a paint stripping control device for a stator winding machine, comprising a pay-off tensioning mechanism 100, a wire outlet detection mechanism 200, a paint stripping mechanism 300, a stator winding mechanism 400 and a control module arranged in sequence. The wire passes through the pay-off tensioning mechanism 100, the wire outlet detection mechanism 200, the paint stripping mechanism 300 in sequence, and finally enters the stator winding mechanism 400. It is mainly used to accurately control the paint stripping operation of the wire during the stator winding process, solve the problem that the paint stripping starting position deviates from the designed area due to the deviation in the number of stator core laminations, so as to improve the quality of the stator winding and enhance the stability of the winding process.

[0039] Among them, the wire-releasing tensioning mechanism 100 is used to control the tightness of the wire to ensure that the wire maintains a stable tension during the conveying process. It can use a common tension adjustment device, such as a tension adjuster with a spring and a pulley. When the wire is released from the wire-releasing reel, the pulley and the spring are matched to automatically adjust the expansion and contraction of the spring according to the conveying speed and tension change of the wire, thereby realizing real-time adjustment of the wire tension and ensuring that the wire enters the subsequent paint stripping and winding process with appropriate tension. The paint stripping mechanism 300 is used to strip the wire, and it can use a mechanical paint stripping knife or a laser paint stripping device. In this embodiment, a mechanical paint stripping knife is used, and the paint stripping knife is installed on an adjustable knife holder. The knife holder can be adjusted up and down and left and right according to the diameter of the wire and the paint stripping requirements. When the wire reaches the paint stripping position, the paint stripping knife is driven by a motor to accurately cut and remove the paint on the surface of the wire. The stator winding mechanism 400 is used to drive the stator to rotate to realize the winding operation of the wire on the stator. It mainly includes a driving spindle, on which a fixture for fixing the stator is installed. The spindle drives the stator to rotate, while the wire tensioning mechanism continuously feeds the wire so that the wire is evenly wound on the stator.

[0040] It should be noted that the wire-releasing and tensioning mechanism, paint stripping mechanism and stator winding mechanism in this embodiment can adopt existing technologies, such as the mechanism disclosed in patent CN222283038U or other existing mechanisms, and their specific structures will not be repeated in this embodiment.

[0041] As an implementation method of this embodiment, the wire-out detection mechanism 200 is arranged at the front end of the paint stripping mechanism 300 and the rear end of the wire-releasing tensioning mechanism. In this embodiment, the wire-out detection mechanism 200 includes a pneumatic slide 201, and the pneumatic slide 201 can drive a pair of wire-passing wheels to move toward or oppositely along the guide rail direction of the pneumatic slide 201. The pair of wire-passing wheels includes a left wire-passing wheel 206 and a right wire-passing wheel 207. The left wire-passing wheel 206 is fixedly connected to the left movable block 204 through a left rotating shaft 205, and the left movable block 204 is fixedly connected to the left slider 202 of the pneumatic slide 201. The left wire-passing wheel 206 can rotate freely around the left rotating shaft 205; the right wire-passing wheel 207 is installed on the connecting member 208 through a right rotating shaft, and the connecting member 208 is fixedly connected to the right movable block 203, and the right movable block 203 is fixedly connected to the right slider 210 of the pneumatic slide 201. The connecting member 208 is an inverted U-shaped block, the opening of which faces the left wire-passing wheel 206, the bottom surface of the U-shaped block is fixedly connected to the right movable block, and the upper and lower ends of the U-shaped block are respectively provided with coaxial through holes that penetrate the U-shaped cavity in the vertical direction, the right rotating shaft is rotatably installed in the hole, the output shaft end of the encoder 209 is transmission-connected to the upper end of the right rotating shaft, the outer shell of the encoder 209 is fixedly connected to the top surface of the U-shaped block, and the rotation of the right wire-passing wheel 207 can drive the right rotating shaft and the output shaft of the encoder 209 to rotate synchronously.

[0042] When the winding machine is started, the pneumatic slide 201 can drive the left slider 202 and the right slider 210 to move synchronously, so that the two wire wheels are close to each other, thereby achieving the compression of the wire. The pneumatic slide 201 of this embodiment is also provided with a valve body for adjusting the pressure, preferably a proportional valve, to cope with wires of different materials and specifications in actual production, and different requirements for the clamping force of the wire wheel. The valve body can conveniently adjust the clamping force of the wire wheel on the wire, maintain a good contact state between the wire wheel and the wire, and ensure the accuracy and stability of the encoder detection. For example, when processing thinner enameled wires, reduce the pressure to avoid damaging the wire; when processing thicker and harder wires, increase the pressure to ensure sufficient friction between the wire wheel and the wire. In this way, it can be ensured that the wire is always in close contact with the wire wheel during the wire passing process, accurately drive the wire wheel to rotate, and improve the accuracy of the encoder measurement.

[0043] In this embodiment, the surfaces of the two wire-passing wheels are provided with a coating, such as a chrome coating or a ceramic coating, to improve their wear resistance and surface finish, which can reduce the wear on the wire while ensuring the service life of the wire-passing wheels. In addition, the contact surfaces between the two wire-passing wheels and the wire are both configured as a V-groove structure, which can increase the contact surface between the wire-passing wheel surface and the wire, and can also better clamp the wire, preventing the wire from shifting during the wire-passing process, and ensuring that the wire can stably drive the wire-passing wheels to rotate. When the wire is pulled to move, the friction between the wire and the V-grooves of the two wire-passing wheels causes the wire-passing wheels to rotate around their own axes, and at the same time, the output shaft of the encoder 209 coaxially connected to the right shaft also rotates synchronously, collecting the rotation angle signal of the wire-passing wheels in real time.

[0044] In this embodiment, the wire detection mechanism 200 is fixedly connected to the transverse plate 503 through the first adapter plate 504, the paint stripping mechanism 300 is fixedly connected to the transverse plate 503 through the second adapter plate 505, and the transverse plate 503 is fixedly connected to the sliding member 502 of the electric slide 501. The electric slide 501 can drive the transverse plate 503 to drive the wire detection mechanism 200 and the paint stripping mechanism 300 to slide forward and backward along the wire conveying direction. When the paint stripping starting point is determined, the electric slide 501 drives the transverse plate 503 to drive the paint stripping mechanism 300 and the detection mechanism 200 to move to the determined paint stripping starting point coordinate position. When stripping paint, the electric slide 501 drives the transverse plate 503 to drive the paint stripping mechanism 300 and the detection mechanism 200 to move according to the set paint stripping length servo. The paint stripping knife in the paint stripping mechanism 300 strips the paint on the wire. The left wire wheel 206 and the right wire wheel 207 of the detection mechanism 200 still clamp the wire and roll forward along the wire with the servo movement of the electric slide 501, thereby driving the encoder 209 to follow the rotation. The encoder 209 collects the rolling angle signal of the wire wheel in real time and feeds it back to the control module. Through the calculation of the control module, the paint stripping length can be detected in real time.

[0045] The control module in this embodiment is arranged in a control box, including a PLC and a high-speed counter. The high-speed counter is connected to the encoder to receive the pulse signal emitted by the encoder. In this embodiment, the resolution of the encoder is preferably 3600ppr, and a pulse signal is emitted for every 0.1° rotation, and the high-speed counter accumulates and counts these pulse signals. The PLC is connected to the high-speed counter, receives the number of pulses accumulated by the high-speed counter, and calculates the number of rotations of the wire wheel and the displacement of the wire according to these pulse numbers. Furthermore, the PLC will correct the paint stripping trigger coordinates based on the difference between the measured winding length of the stator and the standard winding length of the stator, and generate a paint stripping trigger instruction to control the paint stripping mechanism to perform the paint stripping operation at an accurate position.

[0046] See also Figure 4This embodiment also provides a paint stripping control method for a stator winding machine, and the specific steps are as follows:

[0047] S1. Start the winding machine, and the pneumatic slide drives the two wire wheels to press the wire. Specifically, after starting the winding machine, the PLC first sends a command to the pneumatic slide, and the cylinder of the pneumatic slide starts to work, driving the two sliders to move towards each other, so that the wire wheels installed on the sliders are close to each other, and finally the wire is pressed. At the same time, through the valve body of the pneumatic slide, ensure that the wire wheel applies constant pressure to the wire, and ensure that there is enough friction between the wire and the wire wheel, so as to accurately drive the wire wheel to rotate.

[0048] S2. During the wire pulling process, the wire wheel is driven to rotate, and the encoder collects the rotation angle signal of the wire wheel in real time. Specifically, in the process of the stator winding mechanism driving the stator to rotate and the wire unwinding tensioning mechanism conveying the wire, the friction between the wire and the wire wheel causes the wire wheel to rotate around its own axis. The encoder coaxially connected to the wire wheel collects the rotation angle signal of the wire wheel in real time, and converts it into a pulse signal and sends it to the high-speed counter. The resolution of the encoder can be selected according to actual needs. For example, 3600 pulse signals are sent out for each rotation, so that the rotation angle of the wire wheel can be accurately measured.

[0049] S3, the high-speed counter accumulates the encoder pulses and transmits them to the PLC. Specifically, after receiving the pulse signal sent by the encoder, the high-speed counter accumulates and counts it. The high-speed counter has the ability to count quickly and can accurately record each pulse signal sent by the encoder. During the counting process, the high-speed counter will continuously transmit the accumulated number of pulses to the PLC so that the PLC can perform real-time calculation and processing.

[0050] S4, PLC calculates the number of revolutions of the wire wheel according to the number of pulses. Specifically, after receiving the number of pulses transmitted by the high-speed counter, PLC calculates the number of revolutions of the wire wheel according to the resolution of the encoder using the following formula:

[0051]

[0052] Among them, DW00020 is the number of revolutions of the wire wheel, IL0C54 is the total number of pulses, and P0 is the resolution of the encoder.

[0053] S5. PLC calculates the actual measured winding length of the stator according to the number of rotations of the wire wheel. Specifically, PLC calculates the actual measured winding length of the stator according to the number of rotations of the wire wheel calculated in step S4 by the following formula:

[0054] ML05202=DW00020*C0, where ML05202 is the actual measured winding length of the stator and C0 is the circumference of the wire wheel.

[0055] S6. PLC calculates the stator winding standard deviation based on the difference between the actual stator winding length and the standard stator winding length, and then determines and corrects the paint stripping trigger coordinates. Specifically, PLC calculates the stator winding standard deviation based on the difference between the actual stator winding length and the standard stator winding length, and then determines the paint stripping trigger coordinates. PLC controls the electric slide to drive the paint stripping mechanism to move and correct the paint stripping trigger coordinates. PLC calculates the stator winding standard deviation using the following formula:

[0056]

[0057] Among them, ML05210 is the stator winding standard deviation, ML05200 is the stator standard winding length, and N0 is the preset number of stator winding coils. Use the following formula to determine the paint stripping trigger coordinates:

[0058] ML05500=ML05230+ML05210*N1,

[0059] Among them, ML05500 is the paint stripping point coordinate of the current stator winding, ML05230 is the standard stator paint stripping point coordinate, and N1 is the preset number of stator winding coils after the paint stripping is completed.

[0060] S7. When the paint stripping mechanism reaches the corrected paint stripping trigger coordinates, the PLC generates a paint stripping trigger instruction to control the paint stripping mechanism to perform paint stripping operations on the wire. Specifically, when the electric slide drives the paint stripping mechanism to reach the corrected paint stripping trigger coordinates, the PLC generates a paint stripping trigger instruction and sends the instruction to the paint stripping mechanism. After receiving the instruction, the paint stripping mechanism immediately starts the paint stripping knife to strip the wire and remove the set length of paint on the surface of the wire.

[0061] S8. After the paint stripping is completed, the stator winding mechanism continues winding until the winding of the current stator is completed.

[0062] This paint stripping control method monitors the rotation angle of the wire wheel in real time, accurately calculates the number of rotations of the wire wheel and the displacement of the wire, and corrects the paint stripping trigger coordinates according to the actual winding situation. It can effectively improve the accuracy of the paint stripping position and solve the problem that the actual length of the wire after winding deviates from the preset value due to the deviation in the number of stator core laminations, which causes the paint stripping starting position to deviate from the designed area. This method is suitable for various types of stator winding machines, especially for production scenarios with high requirements for paint stripping position accuracy, such as the winding production of high-performance motor stators, and can significantly improve product quality and production efficiency.

[0063] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A paint stripping control device for a stator winding machine, comprising a wire tensioning mechanism for controlling the tightness of a wire, a paint stripping mechanism for stripping the paint of the wire, and a stator winding mechanism for driving the stator to rotate and realize winding, which is characterized in that: It also includes a wire-out detection mechanism arranged between the wire-releasing and tensioning mechanism and the paint stripping mechanism, the wire-out detection mechanism includes a pair of wire-passing wheels, one of which is coaxially connected to an encoder; it also includes a control module arranged in a control box, the control module includes a PLC and a high-speed counter, the high-speed counter is connected to the encoder to receive a pulse signal, and the PLC calculates the wire displacement according to the pulse signal and generates a paint stripping trigger instruction.

2. The paint stripping control device for a stator winding machine according to claim 1, characterized in that: The wire-out detection mechanism and the paint stripping mechanism are fixedly connected to the sliding member of the electric slide through a large transverse plate and driven by the electric slide, and the electric slide drives the sliding member to slide forward and backward along the wire conveying direction.

3. The paint stripping control device for a stator winding machine according to claim 2, characterized in that: The wire-out detection mechanism further comprises a pneumatic slide, which drives a pair of wire-passing wheels to move toward or in opposite directions.

4. The paint stripping control device for a stator winding machine according to claim 3, characterized in that: A pair of line-passing wheels include a left line-passing wheel and a right line-passing wheel, the left line-passing wheel is fixedly connected to the left movable block by a left rotating shaft, the left movable block is fixedly connected to the left sliding block of the pneumatic slide table, and the left line-passing wheel can rotate freely around the left rotating shaft; the right line-passing wheel is installed on the connecting member by the right rotating shaft, the connecting member is fixedly connected to the right movable block, and the right movable block is fixedly connected to the right sliding block of the pneumatic slide table, the connecting member is an inverted U-shaped block, the opening of the U-shaped block faces the left line-passing wheel, the bottom surface of the U-shaped block is fixedly connected to the right movable block, and the upper and lower ends of the U-shaped block are respectively provided with coaxial through holes that penetrate the U-shaped cavity in the vertical direction, the right rotating shaft can be rotatably installed in the hole, the output shaft end of the encoder is transmission-connected to the upper end of the right rotating shaft, and the rotation of the right line-passing wheel can drive the right rotating shaft and the encoder output shaft to rotate synchronously.

5. The paint stripping control device for a stator winding machine according to claim 4, characterized in that: The surface of the wire passing wheel is provided with a coating, and the contact surface with the wire is a V-shaped groove structure.

6. A paint stripping control method for a stator winding machine, characterized in that: The following steps are involved: S1. Start the winding machine, and the pneumatic slide drives the two wire wheels to move towards each other to compress the wire; S2: During the wire pulling process, the wire wheel is driven to rotate, and the encoder collects the rotation angle signal of the wire wheel in real time; S3, high-speed counter accumulates encoder pulses and transmits them to PLC; S4, PLC calculates the number of revolutions of the wire wheel according to the accumulated pulse number; S5, PLC calculates the actual winding length of the stator according to the number of revolutions of the wire wheel; S6, PLC calculates the stator winding standard deviation based on the difference between the actual stator winding length and the stator standard winding length, and then determines and corrects the paint stripping trigger coordinates; S7, when the paint stripping mechanism reaches the corrected paint stripping trigger coordinate, the PLC generates a paint stripping trigger instruction to control the paint stripping mechanism to perform paint stripping operation on the wire; S8. After the paint stripping is completed, the stator winding mechanism continues winding until the winding of the current stator is completed.

7. The paint stripping control method of a stator winding machine according to claim 6, characterized in that: The calculation formula for the number of revolutions of the wire wheel in S4 is: Among them, DW00020 is the number of revolutions of the wire wheel, IL0C54 is the total number of pulses, and P0 is the resolution of the encoder.

8. The paint stripping control method of the stator winding machine according to claim 7, characterized in that: The calculation formula of the stator winding length measured in S5 is: ML05202=DW00020*C0, Among them, ML05202 is the measured winding length of the stator, and C0 is the circumference of the wire pulley.

9. The paint stripping control method of a stator winding machine according to claim 8, characterized in that: The formula for calculating the stator winding standard deviation in S6 is: Among them, ML05210 is the standard deviation of stator winding, ML05200 is the standard stator winding length, and N0 is the preset number of stator winding coils; the formula for determining the paint stripping trigger coordinates is: ML05500=ML05230+ML05210*N1, Among them, ML05500 is the paint stripping point coordinate of the current stator winding, ML05230 is the standard stator paint stripping point coordinate, and N1 is the preset number of stator winding coils after the paint stripping is completed.

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