Control Method of High-Speed Cable Rewinder

Abstract

A control method for a high-speed cable rewinding machine, the high-speed rewinding machine comprising a pay-off reel, a pay-off and line-stabilizing cross-shaped frame, a drying device, a spark tester, a speed detector, a take-up and line-stabilizing cross-shaped frame, and a take-up reel arranged in sequence from the pay-off to the take-up direction. A pay-off swing rod position sensor is installed on the pay-off reel; the traversing motor of the take-up reel is a servo motor. During the production operation of the high-speed rewinding machine: the position information of the pay-off swing rod is collected by a sensor, the pay-off speed information of the pay-off reel and the line length information passing through the speed detector are collected by the speed detector, and the rotation speed of the take-up motor of the take-up reel is collected; the traversing guide pulley of the take-up reel is controlled to move left and right reciprocally by controlling the traversing motor. A pay-off / take-up closed-loop control algorithm is used to control the take-up motor of the pay-off / take-up reel so as to achieve high-speed and stable pay-off and take-up synchronization without a wire storage device.

Description

Technical Field

[0001] The present invention relates to a high-speed rewinding machine for cables and its control system, belonging to the technical field of cable processing equipment. Background Art

[0002] Currently, the technical level of equipment in many processes of the cable industry has been continuously improved, and the production efficiency has also become higher and higher. In the cable production process, if one process cannot keep up with the efficiency of the previous and subsequent processes, it becomes a bottleneck process. Due to its technological characteristics, the rewinding process is also one of the bottleneck processes.

[0003] During the production process, the function of the rewinding process is to divide the cable core (conductor extruded with an insulating layer, etc.) produced in the previous extrusion process into required lengths and load them onto trays. The subsequent process connected to the rewinding process is the cabling and stranding process. The rewinding process is a key process that connects the previous and subsequent processes, and the production efficiency of this process directly affects the production arrangements and efficient operation of the previous and subsequent processes.

[0004] Currently, the common problems in rewinding equipment are: independent control of the pay-off and take-up stands, poor control algorithm effects, etc. These problems limit the rewinding production speed. Without systematic changes, increasing the equipment speed will cause the pay-off and take-up to be out of sync, resulting in quality problems such as thinning and breaking of the cable core. Summary of the Invention

[0005] The purpose of the present invention is to design a rewinding method in the cable production process to solve the above problems existing in the prior art, improve the production efficiency of the rewinding equipment, and at the same time improve the degree of production automation.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A control method for a high-speed cable rewinding machine, the high-speed rewinding machine includes a pay-off stand 1, a pay-off and line-stabilizing cross-shaped stand 2, a drying device 3, a spark tester 4, a speed detector 5, a take-up and line-stabilizing cross-shaped stand 6, and a take-up stand 7 arranged in sequence from the pay-off to the take-up direction; the cable is released from the pay-off reel 11, bypasses the pay-off swing rod 12, passes through the pay-off and line-stabilizing cross-shaped stand 2, the drying device 3, the spark tester 4, the speed detector 5, the take-up and line-stabilizing cross-shaped stand 6, and finally reaches the take-up stand 7 and is stored on the take-up reel;

[0008] First, install a position sensor for the pay-off swing rod 12 on the pay-off stand 1; the traversing motor 71 of the take-up stand 7 uses a servo motor; the traversing motor 71 of the take-up stand 7 uses a servo motor;

[0009] Then, during the production operation of the high-speed rewinding machine:

[0010] The position information of the pay-off swing rod 12 is collected through the sensor, the wire outlet speed information of the pay-off frame and the wire length information passing through the speed meter 5 are collected through the speed meter 5, and the speed of the wire take-up motor 73 of the take-up frame 7 is collected; the wire arrangement motor 71 is controlled to be a servo motor, thereby controlling the wire arrangement guide wheel 74 of the take-up frame 7 to move back and forth left and right;

[0011] The control method in the production process includes the following steps:

[0012] After the equipment is powered on, it enters ST1: In ST1, the initialization actions of the actuators on the pay-off and take-up racks are manually completed, such as clamping the pay-off and take-up reels, keeping the brakes in the braking state, and returning the cable arrangement to the initial position. Next, it enters ST2;

[0013] In ST2, the process parameters are manually set, such as line speed, wire spacing, coil diameter initialization, etc. Next, enter ST3;

[0014] In ST3, the start button is manually pressed and the equipment starts to run; next, enter ST4;

[0015] In ST4, determine whether the device can operate normally; if ST4 operates normally, enter ST7;

[0016] In ST7, the equipment automatically runs to the set line speed and continues to work; then, it enters ST8;

[0017] In ST8, during the normal operation of the equipment, the equipment determines whether there is a fault in the operation and whether the product has quality problems such as breakdown. If ST8 operates normally, it enters ST9;

[0018] In ST9, the equipment will automatically slow down and stop after running to the set length, ending the rewinding production of a cable core.

[0019] If ST4 and ST8 operate abnormally, enter ST5;

[0020] In ST5, the equipment automatically stops and sounds an alarm to alert the operator; then, enter ST6;

[0021] In ST6, the equipment operator determines to eliminate the abnormal state of the equipment (if the equipment fails) or repair the cable core (if the core is broken), and then returns to ST3;

[0022] The pay-off motor of the pay-off stand 1 is controlled by using a pay-off closed-loop control algorithm: This control algorithm consists of a position loop, a speed loop, and a current loop. Among them, the speed loop and the current loop are executed inside the frequency converter; the position loop consists of a position setpoint, a position feedback, a roll diameter calculator, and a position controller. The position controller is a proportional adaptive PID controller. The difference between the position setpoint and the position feedback serves as the input signal of the position controller, and proportional adaptive adjustment is performed based on the roll diameter calculated from the line speed and the shaft speed of the pay-off motor. Finally, the position controller outputs a set speed to the pay-off motor frequency converter. The discrete mathematical model of the position controller is as follows:

[0023]

[0024] Among them, Vout is the set speed of the pay-off motor, SVline is the set line speed of the equipment, Kp is the adaptive proportionality coefficient, e(k) is the deviation value of the pendulum position in the current cycle, e(k - 1) is the deviation value of the pendulum position in the previous cycle, e(0) is the deviation value of the pendulum position in the first cycle, Tc is the processor cycle time, Ki is the integral coefficient, Kd is the differential coefficient, i is the speed ratio from the output shaft of the pay-off motor to the drive shaft of the pay-off stand, pi is the constant of pi, and D is the real-time roll diameter.

[0025] The adaptive proportionality coefficient is as follows:

[0026]

[0027] Among them, D is the real-time roll diameter, Dmin is the minimum roll diameter, Dmax is the maximum roll diameter, Kpmax is the proportionality coefficient corresponding to the maximum roll diameter, and Kpmin is the proportionality coefficient corresponding to the minimum roll diameter.

[0028] The take-up motor of the take-up stand 7 is controlled by using a take-up closed-loop control algorithm: This control algorithm consists of a process line speed loop, a speed loop, and a current loop. Among them, the speed loop and the current loop are executed inside the frequency converter; the process line speed loop consists of a line speed setpoint, a line speed feedback, a roll diameter calculator, and a line speed controller. The position controller is a proportional adaptive PID controller. The difference between the line speed setpoint and the line speed feedback serves as the input signal of the position controller, and proportional adaptive adjustment is performed based on the roll diameter calculated from the line speed and the shaft speed of the pay-off motor. Finally, the position controller outputs a set speed to the pay-off motor frequency converter. The discrete mathematical model of the position controller is as follows:

[0029]

[0030] Among them, Vout is the given rotational speed of the take-up motor, SVline is the given line speed of the equipment, Kp is the adaptive proportionality coefficient, e(k) is the deviation value of the line speed in the current cycle, e(k - 1) is the deviation value of the line speed in the previous cycle, e(0) is the deviation value of the line speed in the first cycle, Tc is the processor cycle time, Ki is the integral coefficient, Kd is the differential coefficient, i is the speed ratio from the output shaft of the take-up motor to the drive shaft of the take-up frame, pi is the constant of pi, and D is the real-time coil diameter.

[0031] The adaptive proportionality coefficient is as follows:

[0032]

[0033] Among them, D is the real-time coil diameter, Dmin is the minimum coil diameter, Dmax is the maximum coil diameter, Kpmax is the proportionality coefficient corresponding to the maximum coil diameter, and Kpmin is the proportionality coefficient corresponding to the minimum coil diameter.

[0034] In addition, the algorithm in the present invention is not limited to the PID controller, and it refers to the general term of various algorithms that can achieve the functions required by the present invention. The controller and driver in the present invention are not limited to the PLC and the frequency converter, and can also be other control cores such as single-chip microcontrollers and other drivers such as servo drivers.

[0035] Furthermore, the speed detector 5 is composed of a pair of rollers. The rotation axes of this pair of rollers are parallel, and their outer end faces are opposite to each other. The cable passes through between the outer end faces of the two rollers; at least one roller is used as the rotation shaft of the speed measurement wheel and is connected to the signal input shaft of the photoelectric encoder;

[0036] When the rewinder is running, the speed measurement wheel 51 and the other roller clamp the cable, and the cable drives the speed measurement wheel 51 to rotate, that is, drives the photoelectric encoder 52 to rotate; when the photoelectric encoder 52 rotates, it will send out A / B phase pulse signals with corresponding frequencies to the PLC, and the line speed and the passed line length are calculated in the PLC.

[0037] A travel switch is installed on the pay-off frame 1 to detect the limit position of the swing rod; the output signal of the travel switch is collected and used as an indication of abnormal pay-off. This travel switch can also be a component of the position sensor of the pay-off swing rod 12.

[0038] The position sensor of the pay-off swing rod 12 includes a cam and a proximity switch; the cam is an Archimedean spiral cam, and the proximity switch is a proximity switch with a 0 - 10V analog output. When the cam rotates, the position of the measurement end of the proximity switch changes linearly.

[0039] The production equipment for implementing this method consists of a wire pay-off stand, a wire take-up stand, a speed detector, a spark tester, and a control system. The pay-off system and the take-up system are directly connected by an electric wire, and there is no wire storage system as a transition in between. The production equipment can automatically run at high speed and stop based on the control program while maintaining stable tension, and can respond to abnormal states of the cable core and automatically prompt manual intervention for processing.

[0040] The advantages of the present invention are as follows: The rotational speed control of the pay-off stand and the take-up stand are mutually coupled. The calculated coil diameter value in real time is used as the compensation for negative feedback control. Through the optimized PID control algorithm, it can ensure the synchronous and stable high-speed operation of pay-off and take-up.

[0041] During the implementation process of the present invention, the pay-off stand can adopt existing equipment, but it needs to be locally modified to add a structure for measuring / obtaining the position of the pendulum rod and a signal acquisition device. The position signal of the pendulum rod is used as the feedback input for the closed-loop control of the rotational speed of the pay-off motor. Detecting the limit position signal of the pendulum rod is used as an indication of abnormal pay-off.

[0042] The take-up stand can adopt existing equipment. The traversing device of the take-up stand uses a servo motor as the power source. The traversing device is used to control the left and right reciprocating movement of the cable core on the take-up reel during rewinding, and the movement speed automatically follows the take-up rotational speed. The proximity switch is used to indicate the origin of the servo mechanism and for left and right limit protection.

[0043] The speed detector consists of a standard wheel, a pneumatic wire pressing device, and an optical encoder. Among them, the optical encoder is used to measure the running linear speed of the wire during rewinding, is also used to measure the length of the wire rewinding, and is also used as the feedback input for the closed-loop control system of the rotational speed of the take-up motor. The above-mentioned linear speed is also used for the coil diameter calculation of the pay-off and take-up wire reels, and the calculated coil diameter value is used as the compensation input for the closed-loop control system of pay-off and take-up rotational speeds.

[0044] The control method during the production operation process can be implemented through an industrial control system. This system executes the following logic through a PLC:

[0045] Taking the condition that the full wire reel is placed on the pay-off stand, the empty wire reel is placed on the take-up stand, and the wire end is pulled out from the pay-off reel and wound onto the take-up reel, after setting relevant parameters such as the running linear speed and the rewinding length, through the control of the control unit, the rewinder can be automatically started.

[0046] After startup, based on the set linear speed, the take-up motor of the rewinder can gradually accelerate to the corresponding rotational speed, and at the same time, the real-time coil diameter is calculated by feedback of the linear speed and the motor rotational speed. The above-mentioned feedback linear speed is used as the feedback signal of the take-up closed-loop control system, and the above-mentioned coil diameter is used as the feed-forward compensation of the take-up closed-loop control system. Through the closed-loop control algorithm, it ensures that the rewinder runs stably at the set linear speed.

[0047] After startup, the operation of the take-up motor will pull up the swing rod of the pay-off stand through the wire. Based on the set position of the swing rod built into the program, the pay-off motor of the rewinder can gradually run to the corresponding speed. At the same time, the real-time coil diameter is calculated by feedback of the wire speed and the motor speed, and the real-time position value of the swing rod is calculated by feedback of the position signal. The above swing rod position value is used as the feedback signal of the pay-off closed-loop control system, and the above coil diameter is used as the feed-forward compensation of the pay-off closed-loop control system. Through the closed-loop control algorithm, it is ensured that the pay-off swing rod operates stably at the set position, that is, the pay-off tension is ensured to be stable.

[0048] After startup, the spark machine can automatically work at the set voltage value and can perform on-line monitoring of the insulation condition of the wire. When insulation breakdown occurs, the rewinder can automatically stop and record the current length, and at the same time, alarm to prompt the worker to handle it.

[0049] After startup, when the cable core breaks, the pay-off swing rod will move to the limit position. After the travel switch is turned on, the rewinder can automatically stop and record the current length, and at the same time, alarm to prompt the worker to handle it. Description of the Drawings

[0050] Figure 1 It is the wire body diagram of the high-speed cable rewinder in the embodiment.

[0051] Figure 2 It is the schematic diagram of the pay-off stand in the embodiment.

[0052] Figure 3 It is the schematic diagram of the speed detector in the embodiment.

[0053] Figure 4 It is the schematic diagram of the take-up stand in the embodiment.

[0054] Figure 5 It is the logic flow chart of the control system in the embodiment.

[0055] Figure 6 It is the closed-loop control block diagram of the pay-off stand in the embodiment.

[0056] Figure 7 It is the closed-loop control block diagram of the take-up stand in the embodiment.

[0057] Figure 8 It is the side view of the swing rod position sensor in the embodiment. Detailed Implementation Manner

[0058] The present invention will be further described below in conjunction with the schematic diagram. The following embodiments are only used to more clearly explain the technical solution of the present invention, and should not be used to limit the protection scope of the present invention.

[0059] In this embodiment, the wire pay-off stand 1 can adopt a wire pay-off stand in the prior art (such as the wire pay-off stand in Chinese Patent CN219567102U "A Cable Rewinding Active Wire Pay-off Stand"), and the wire take-up stand 7 can adopt a wire take-up stand in the prior art (such as CN219408691U "A High-speed Rewinding Wire Take-up Stand for Electric Wires and Cables").

[0060] Refer to Figure 1 the wire body of the wire turning machine production line, which is composed of a wire pay-off stand 1, a wire pay-off and stabilizing cross-shaped stand 2, a drying device 3, a spark tester 4, a speed detector 5, a wire take-up and stabilizing cross-shaped stand 6, and a wire take-up stand 7.

[0061] For the structure of the wire pay-off stand 1 in this embodiment, please refer to Figure 2 and Figure 8 The wire pay-off stand 1 is composed of a wire pay-off reel 11, a wire pay-off swing rod 12, a cam 13, a proximity switch 14, a wire pay-off motor 15, and a machine body frame. The wire pay-off swing rod 12 is used to buffer the process of controlling and adjusting the wire pay-off and take-up speeds. The cam 13 is fixed to the wire pay-off swing rod 12 and rotates around a fixed axis together with the wire pay-off swing rod 12. When the cam 13 rotates to different angles, the distance between it and the measuring head of the proximity switch 14 changes, and the proximity switch 14 outputs an analog voltage signal between 0 - 10V to the PLC, and the position of the swing rod is calculated in the PLC. The cam 13 is an Archimedean spiral cam, and the proximity switch 14 is a proximity switch with 0 - 10V analog output. When the cam 13 rotates, the position of its measuring end with respect to the proximity switch 14 changes linearly.

[0062] In this embodiment, the cable core is released from the wire pay-off reel 11, bypasses the wire pay-off swing rod 12, passes through the wire pay-off and stabilizing cross-shaped stand 2, the drying device 3, the spark tester 4, the speed detector 5, the wire take-up and stabilizing cross-shaped stand 6, and finally reaches the wire take-up stand 7 and is stored on the wire take-up reel.

[0063] In this embodiment, a speed detector 5 is provided. Refer to Figure 3 The speed detector 5 is composed of a speed measuring wheel 51, an optoelectronic encoder 52, and a support frame. The speed measuring wheel 51 is a roller made of alloy with a standard diameter, and the circumference it travels per rotation is fixed. The optoelectronic encoder 52 is installed on the concentric shaft of the speed measuring wheel 51 and rotates with the speed measuring wheel 51. When the rewinder is running, the speed measuring wheel 51 and another roller clamp the cable core. When the cable core moves, it drives the speed measuring wheel 51 to rotate, that is, drives the optoelectronic encoder 52 to rotate. When the optoelectronic encoder 52 rotates, it emits A / B phase pulse signals with corresponding frequencies to the PLC, and the linear speed and the length of the wire passed are calculated in the PLC.

[0064] For the structure of the wire take-up stand 7 in this implementation, please refer to Figure 4。The take-up frame 1 consists of a take-up reel 75, a wire arranging motor 71, a ball screw 72, a wire arranging guide pulley 74, a take-up motor 73 and a machine body frame. The wire arranging motor 71 is a servo motor, which can accurately follow the rotation speed of the take-up motor 73 and accurately control the left and right reciprocating movement of the wire arranging guide pulley 74 through the ball screw 72.

[0065] For the operation logic of the high-speed rewinder in this embodiment, please refer to Figure 5 。

[0066] First, after the device is powered on, it enters ST1. In ST1, the operator completes the initialization actions of the actuators on the pay-off and take-up frames, such as clamping the pay-off reel and take-up reel, keeping the brakes in the braking state, and returning the wire arrangement to the initial position.

[0067] Next, it enters ST2. In ST2, the operator completes the setting of process parameters, such as wire speed, wire arrangement pitch, and initializing the coil diameter.

[0068] Next, it enters ST3. In ST3, the operator presses the start button, and the device starts to run.

[0069] Next, it enters ST4. In ST4, it is judged whether the device can operate normally.

[0070] If ST4 runs normally, it enters ST7. In ST7, the device automatically runs to the set wire speed and continues to work.

[0071] Next, it enters ST8. In ST8, during the normal operation of the device, the device itself judges whether there is a fault in the operation and whether there are quality problems such as breakdown of the product.

[0072] If ST8 runs normally, it enters ST9. In ST9, after the device automatically runs to the set length, it can automatically decelerate and stop, ending the rewinding production of one coil of cable core.

[0073] If ST4 and ST8 run abnormally, it enters ST5. In ST5, the device automatically stops and alarms to remind the operator. Next, it enters ST6. In ST6, the device operator judges and eliminates the abnormal state of the device (if there is a device fault) or repairs the cable core (if the core is broken down), and then returns to ST3.

[0074] This embodiment provides a closed-loop control algorithm for the pay-off motor. The control principle of the pay-off motor is described below according to the Figure 6 closed-loop block diagram shown.

[0075] This control algorithm consists of a position loop, a speed loop, and a current loop. Among them, the speed loop and the current loop are executed inside the frequency converter and will not be elaborated further. The position loop consists of a position setpoint, a position feedback, a coil diameter calculator, and a position controller. The position controller is a PID controller with feedforward compensation. The difference between the position setpoint and the negative position feedback serves as the input signal of the position controller. The coil diameter calculated based on the linear speed and the shaft speed of the unwinding motor is used as the set value of the adaptive proportional coefficient. Finally, the position controller outputs a set speed to the frequency converter of the unwinding motor.

[0076] This embodiment provides a closed-loop control algorithm for a take-up motor. The control principle of the take-up motor will be described below according to Figure 7 the closed-loop block diagram shown.

[0077] This control algorithm consists of a process line speed loop, a speed loop, and a current loop. Among them, the speed loop and the current loop are executed inside the frequency converter and will not be elaborated further. The process line speed loop consists of a line speed setpoint, a line speed feedback, a coil diameter calculator, and a line speed controller. The line speed controller is a PID controller with feedforward compensation. The difference between the line speed setpoint and the line speed feedback serves as the input signal of the line speed controller. The coil diameter calculated based on the line speed and the shaft speed of the take-up motor is used as the set value of the adaptive proportional coefficient. Finally, the line speed controller outputs a set speed to the frequency converter of the take-up motor.

[0078] In addition, the algorithm in the present invention is not limited to the PID controller, and refers to a general term for various algorithms that can achieve the functions required by the present invention.

[0079] In addition, the controller and the driver in the present invention are not limited to the PLC and the frequency converter, and can also be other control cores such as single-chip microcomputers and other drivers such as servo drivers.

[0080] The above describes the embodiments of the present invention. However, the present invention is not limited to the above embodiments and can be variously changed without exceeding the scope of the claims.

Claims

1. A control method for a high-speed cable rewinding machine, the high-speed rewinding machine comprising a pay-off stand (1), a pay-off and line-stabilizing cross-shaped stand (2), a drying device (3), a spark tester (4), a speed detector (5), a take-up and line-stabilizing cross-shaped stand (6) and a take-up stand (7) arranged in sequence from the pay-off to the take-up direction; the cable is released from a pay-off reel (11), bypasses a pay-off swing rod (12), passes through the pay-off and line-stabilizing cross-shaped stand (2), the drying device (3), the spark tester (4), the speed detector (5), the take-up and line-stabilizing cross-shaped stand (6), and finally reaches the take-up stand (7) and is stored on a take-up reel; Its characteristics are First, a pay-off swing arm position sensor is installed on the pay-off frame (1); a wire arrangement motor (71) of the take-up frame (7) adopts a servo motor; Then, during the production operation of the high-speed rewinding machine: The position information of the pay-off swing rod (12) is collected through a pay-off swing rod position sensor, the wire outlet speed information of the pay-off frame and the wire length information passing through the speed meter (5) are collected through a speed meter (5), and the rotation speed of the wire take-up motor (73) of the take-up frame (7) is collected; and the wire arrangement motor (71) is controlled to control the left and right reciprocating movement of the wire arrangement guide wheel (74) of the take-up frame (7); The control method in the production process includes the following steps: After the equipment is powered on, it enters ST1: In ST1, the initialization action of the actuator on the pay-off and take-up rack is manually completed, including clamping the pay-off and take-up reels, keeping the brakes in the braking state, and returning the cable arrangement to the initial position; then, it enters ST2; In ST2, the process parameters are set manually, including line speed, wire spacing and coil diameter initialization; then, enter ST3; In ST3, the start button is manually pressed and the equipment starts to run; next, enter ST4; In ST4, determine whether the device can operate normally; if ST4 operates normally, enter ST7; In ST7, the equipment automatically runs to the set line speed and continues to work; then, it enters ST8; In ST8, during the normal operation of the equipment, the equipment determines whether there is a fault in the operation and whether the product has a quality problem of breakdown; if ST8 operates normally, it enters ST9; In ST9, the equipment will automatically slow down and stop after running to the set length, ending the rewinding production of a cable core. If ST4 or ST8 operates abnormally, enter ST5; In ST5, the equipment automatically stops and sounds an alarm to alert the operator; then, enter ST6; In ST6, the equipment operator determines whether to resolve the abnormal state of the equipment or repair the cable core, and then returns to ST3; A pay-off closed-loop control algorithm is used to control the pay-off motor of the pay-off stand (1): the control algorithm consists of a position loop, a speed loop and a current loop, wherein the speed loop and the current loop are executed in a frequency converter; the position loop consists of a position setting, a position feedback, a winding diameter calculator and a position controller, and the position controller is a proportional adaptive PID controller; the difference between the position setting and the position feedback is used as the input signal of the position controller, and the winding diameter calculated according to the line speed and the pay-off motor shaft speed is proportionally adaptively adjusted, and finally the position controller outputs a given speed to the pay-off motor frequency converter; the discrete mathematical model of the position controller is as follows:

2. Among them, Vout is the given speed of the pay-off motor, SVline is the given line speed of the device, Kp is the adaptive proportional coefficient, e(k) is the deviation value of the swing position in the current cycle, e(k-1) is the deviation value of the swing position in the previous cycle, e(0) is the deviation value of the swing position in the first cycle, Tc is the processor cycle time, Ki is the integral coefficient, Kd is the differential coefficient, i is the speed ratio from the pay-off motor output shaft to the pay-off frame drive shaft, pi is the pi constant, and D is the real-time coil diameter; The adaptive proportionality coefficient is as follows:

3. Among them, D is the real-time coil diameter, Dmin is the minimum coil diameter, Dmax is the maximum coil diameter, Kpmax is the proportionality coefficient corresponding to the maximum coil diameter, and Kpmin is the proportionality coefficient corresponding to the minimum coil diameter; The take-up closed-loop control algorithm is used to control the take-up motor of the take-up frame (7); the take-up closed-loop control algorithm is the same as the pay-off closed-loop control algorithm.

4. The control method of the high-speed rewinding machine for cables according to claim 1, characterized in that The speed detector (5) is composed of a pair of rollers. The rotation axes of the pair of rollers are parallel, and their outer end faces are opposite to each other. The cable passes through between the outer end faces of the two rollers; at least one roller serves as a speed measuring wheel, and the rotating shaft of the speed measuring wheel is connected to the signal input shaft of the photoelectric encoder; When the rewinder is running, the speed measuring wheel (51) and another roller clamp the cable, and the cable drives the speed measuring wheel (51) to rotate, that is, drives the photoelectric encoder (52) to rotate; when the photoelectric encoder (52) rotates, it will send out A / B phase pulse signals with corresponding frequencies to the PLC, and the linear velocity and the passed wire length are calculated in the PLC.

5. The control method of the high-speed cable rewinding machine according to claim 1, characterized in that A travel switch is installed on the pay-off frame (1) to detect the extreme position of the swing rod; the output signal of the travel switch is collected and used as an indication of pay-off abnormality.

6. The control method of the high-speed rewinding machine for cables according to claim 1, characterized in that The pay-off swing rod position sensor includes a cam and a proximity switch; the cam (13) is an Archimedes spiral cam, and the proximity switch (14) is a proximity switch with analog output. When the cam (13) rotates, the position of the measuring end of the proximity switch (14) changes linearly.

Images