A tension control device and control method for organic coating equipment

Abstract

The present invention provides a tension control device for organic coating equipment and a control method thereof, which can control a small target tension and overcome the unbalanced resistance torque of unwinding and reeling. The control device comprises an unwinding shaft, a cold drum and a rewinding shaft for sequentially winding a base film. An unwinding tension detection roller is provided between the unwinding shaft and the cold drum, and a rewinding tension detection roller is provided between the rewinding shaft and the cold drum. A first sensor and a second sensor are provided on the unwinding tension detection roller and the rewinding tension detection roller, respectively. A first detector and a second detector are provided on one side of the unwinding shaft and the rewinding shaft, respectively. The tension control device also comprises a speed detector for detecting the rotational linear speed of the cold drum and a control module which is electrically connected to the speed detector, the first sensor, the second sensor, the first detector and the second detector and can control the rotational angular speed of the unwinding shaft and the rewinding shaft. The control method comprises the steps of film feeding, speed measurement, unwinding tension detection, tension size judgment, rewinding speed regulation, unwinding speed regulation and the like.

Description

[Technical field]

[0001] The invention relates to the field of organic coating, in particular to a tension control device of organic coating equipment and a control method thereof. [Background technology]

[0002] In the conventional coating tension control mode, the winding and unwinding shafts (winding roller, unwinding roller) basically adopt the torque control mode, which uses a tension controller to compare the current tension with the set target tension, thereby controlling the reverse torque of the winding and unwinding shafts to achieve tension control. Due to the existence of mechanical manufacturing errors and installation measurement errors, the resistance at each angle of winding / unwinding is different, and there is a possibility that the resistance at a certain point suddenly increases, resulting in tension fluctuations.

[0003] In this torque control mode, the film movement mainly depends on the friction between the cold drum and the base film. When the cold drum rotates, it drives the base film to wind between the unwinding shaft and the winding shaft. The problem is that the target tension cannot be too small. If the target tension is too small, the base film will float on the surface of the cold drum and cannot drive the base film to move. Therefore, the friction between the cold drum and the base film is unstable, resulting in the inability to control small tension coating. [Summary of the invention]

[0004] The technical problem to be solved by the present invention is to provide a tension control device and a control method for an organic coating device which can control a small target tension and overcome the unbalanced resistance torque of the winding and unwinding rotation.

[0005] The object of the present invention is achieved in that:

[0006] A tension control device for an organic coating device comprises an unwinding shaft, a cold drum and a winding shaft for sequentially winding a base film, an unwinding tension detection roller is arranged between the unwinding shaft and the cold drum, a winding tension detection roller is arranged between the winding shaft and the cold drum, a first sensor for detecting the unwinding tension and a second sensor for detecting the winding tension are respectively arranged on the unwinding tension detection roller and the winding tension detection roller, a first detector for detecting the winding diameter of the unwinding shaft and a second detector for detecting the winding diameter of the winding shaft are respectively arranged on one side of the unwinding shaft and the winding shaft, the tension control device further comprises a speed detector for detecting the rotational linear speed of the cold drum and a control module which is electrically connected to the speed detector, the first sensor, the second sensor, the first detector and the second detector and can control the rotational angular speed of the unwinding shaft and the winding shaft.

[0007] In the tension control device of an organic coating equipment as described above, the cold drum is provided with a cold drum driving motor which drives it to rotate and is electrically connected to the control module, the unwinding shaft is provided with an unwinding driving motor which drives it to rotate and is electrically connected to the control module, and the winding shaft is provided with a winding driving motor which drives it to rotate and is electrically connected to the control module.

[0008] In the tension control device of the organic coating equipment as described above, a speed measuring roller is provided between the cold drum and the unwinding shaft, and the speed detector is a speed encoder and is provided at the end of the speed measuring roller.

[0009] In the tension control device for organic coating equipment as described above, the first detector and the second detector both use laser rangefinders.

[0010] In the tension control device of the organic coating equipment as described above, guide rollers are provided between the unwinding shaft and the cooling drum and between the winding shaft and the cooling drum.

[0011] In the tension control device of an organic coating device as described above, the control module is provided with a PID controller electrically connected to the unwinding drive motor and the winding drive motor to control the acceleration or deceleration thereof.

[0012] The control method of the tension control device of the organic coating equipment described above includes the following steps: film feeding, the unwinding drive motor drives the unwinding shaft to rotate, the cold drum drive motor drives the cold drum to rotate, and the unwinding drive motor drives the winding shaft to rotate, thereby driving the base film to move between the unwinding shaft, the cold drum and the winding shaft; speed measurement, the speed detector detects the speed of film feeding and transmits the speed information to the control module; winding tension detection, the second sensor detects the winding tension and transmits the winding tension information to the control module; unwinding tension detection, the first sensor detects the unwinding tension and transmits the unwinding tension information to the control module; tension size judgment, the control module judges whether the winding tension and the unwinding tension are equal to the target winding tension and the target unwinding tension. If the winding tension and the unwinding tension are equal to the target winding tension and the target unwinding tension, there is no need to adjust the winding shaft and the unwinding shaft. Speed ​​regulation; winding speed regulation, when the control module determines that the winding tension is greater than the target winding tension, the control module controls the winding drive motor to decelerate through the PID controller, and when the control module determines that the winding tension is less than the target winding tension, the control module controls the winding drive motor to accelerate through the PID controller; until the control module determines that the winding tension is equal to the target winding tension, the winding drive motor maintains the current speed and continues to run; unwinding speed regulation, when the control module determines that the unwinding tension is greater than the target unwinding tension, the control module controls the unwinding drive motor to accelerate through the PID controller, and when the control module determines that the unwinding tension is less than the target unwinding tension, the control module controls the unwinding drive motor to decelerate through the PID controller; until the control module determines that the unwinding tension is equal to the target unwinding tension, the unwinding drive motor maintains the current speed and continues to run.

[0013] The control method of the tension control device of an organic coating equipment as described above includes the following steps: roll diameter detection. In the steps of winding speed regulation and unwinding speed regulation, the first detector and the second detector respectively detect the roll diameters of the unwinding shaft and the winding shaft, and transmit the corresponding roll diameter information to the control module. The control module calculates the circumference of the current unwinding shaft and the winding shaft, and calculates the current linear speed of the unwinding shaft and the winding shaft.

[0014] As described above, in the control method of the tension control device of an organic coating equipment, in the step of coil diameter detection, a two-second smoothing superposition filtering method is used to calculate the coil diameter values ​​of the current unwinding shaft and the winding shaft, with a resolution of 100ms and a superposition number of 20 times.

[0015] As described above, in the control method of the tension control device of an organic coating equipment, in the unwinding speed regulation and rewinding speed regulation steps, the unwinding drive motor and the rewinding drive motor after speed regulation respectively drive the unwinding shaft and the rewinding shaft to maintain rotation between 0.9 and 1.1 times the current linear speed.

[0016] Compared with the prior art, the present invention can compare the actual winding tension and unwinding tension with the target tension, and adjust the winding tension and unwinding tension to a tension value equal to the target tension in real time, and the unwinding shaft and the winding shaft are driven by the unwinding drive motor and the winding drive motor respectively. When the friction between the base film and the cold drum is unstable, the unwinding drive motor and the winding drive motor can also ensure the overall stability of the tension. Therefore, the present invention can effectively solve the technical problem that the target tension cannot be too small, and also overcome the technical problem of unbalanced resistance torque when the unwinding and rewinding shafts rotate.

Brief Description of the Drawings

[0017] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the electrical connection structure of the control module of the present invention;

[0020] Figure 3 It is a control flow diagram of the present invention. [Specific implementation method]

[0021] A tension control device for an organic coating device comprises an unwinding shaft 1 (unwinding roller), a cold drum 2 and a winding shaft 3 (winding roller) for winding a base film 10 in sequence, an unwinding tension detection roller 4 is provided between the unwinding shaft 1 and the cold drum 2, a winding tension detection roller 5 is provided between the winding shaft 3 and the cold drum 2, a first sensor 6 for detecting the unwinding tension and a second sensor 7 for detecting the winding tension are provided on the unwinding tension detection roller 4 and the winding tension detection roller 5, respectively, a first detector 8 for detecting the winding diameter of the unwinding shaft 1 and a second detector 9 for detecting the winding diameter of the winding shaft 3 are provided on one side of the unwinding shaft 1 and the winding shaft 3, respectively, the tension control device further comprises a speed detector 20 for detecting the rotational linear speed of the cold drum 2 and a control module 100 which is electrically connected to the speed detector 20, the first sensor 6, the second sensor 7, the first detector 8 and the second detector 9 and can control the rotational angular speed of the unwinding shaft 1 and the winding shaft 3.

[0022] In order to realize respective driving, the cold drum 2 is provided with a cold drum driving motor 21 which drives it to rotate and is electrically connected to the control module 100, the unwinding shaft 1 is provided with a unwinding driving motor 11 which drives it to rotate and is electrically connected to the control module 100, and the winding shaft 3 is provided with a winding driving motor 31 which drives it to rotate and is electrically connected to the control module 100.

[0023] A speed measuring roller 200 is provided between the cold drum 2 and the unwinding shaft 1 . The speed detector 20 is a speed encoder and is provided at the end of the speed measuring roller 200 .

[0024] Preferably, both the first detector 8 and the second detector 9 are laser rangefinders.

[0025] In order to further ensure the flatness of the base film 10 and prevent it from wrinkling, guide rollers 300 are provided between the unwinding shaft 1 and the cooling drum 2 and between the winding shaft 3 and the cooling drum 2 .

[0026] The control module 100 is provided with a PID controller electrically connected to the unwinding drive motor 11 and the winding drive motor 31 to control the acceleration or deceleration thereof. The control module 100 may adopt a German Beckhoff PLC controller. The first sensor 6 and the second sensor 7 are pressure sensors, which are respectively arranged at the ends of the unwinding shaft 1 and the winding shaft 3.

[0027] A control method for a tension control device of an organic coating device comprises the following steps: film feeding, an unwinding drive motor 11 drives an unwinding shaft 1 to rotate (clockwise), a cold drum drive motor 21 drives a cold drum to rotate (clockwise), and an unwinding drive motor 11 drives a winding shaft 3 to rotate (counterclockwise), thereby driving a base film 10 to move between the unwinding shaft 1, the cold drum 2 and the winding shaft 3; speed measurement, a speed detector 20 detects the film feeding speed and transmits the speed (i.e., the rotational linear speed of the cold drum 2) information to a control module 100 (as a reference speed for film feeding); winding tension detection, a second sensor 7 detects the winding tension and transmits the winding tension information to the control module 100; unwinding tension detection, a first sensor 6 detects the unwinding tension and transmits the unwinding tension information to the control module 100; tension determination, the control module 100 determines whether the winding tension and the unwinding tension are equal to the target winding tension and the target unwinding tension, if the winding tension and the unwinding tension are equal to the target winding tension and the target unwinding tension, the control module 100 determines whether the winding tension and the unwinding tension are equal to the target winding tension and the target unwinding tension, force, there is no need to adjust the speed of the winding shaft 3 and the unwinding shaft 1; for winding speed adjustment, when the control module 100 determines that the winding tension is greater than the target winding tension, the control module 100 controls the winding drive motor 31 to decelerate through the PID controller, and when the control module 100 determines that the winding tension is less than the target winding tension, the control module 100 controls the winding drive motor 31 to accelerate through the PID controller; until the control module 100 determines that the winding tension is equal to the target winding tension, the winding drive motor 31 maintains the current speed and continues to run; for unwinding speed adjustment, when the control module 100 determines that the unwinding tension is greater than the target unwinding tension, the control module 100 controls the unwinding drive motor 11 to accelerate through the PID controller, and when the control module 100 determines that the unwinding tension is less than the target unwinding tension, the control module 100 controls the unwinding drive motor 11 to decelerate through the PID controller; until the control module 100 determines that the unwinding tension is equal to the target unwinding tension, the unwinding drive motor 11 maintains the current speed and continues to run.

[0028] The control method of the tension control device of the above-mentioned organic coating equipment includes the following steps: roll diameter detection. In the steps of winding speed regulation and unwinding speed regulation, the first detector 8 and the second detector 9 respectively detect the roll diameters of the unwinding shaft 1 and the winding shaft 3, and transmit the corresponding roll diameter information to the control module 100. The control module 100 calculates the current circumference of the unwinding shaft 1 and the winding shaft 3, and calculates the current linear speed of the unwinding shaft 1 and the winding shaft 3.

[0029] In the step of roll diameter detection, a two-second smoothing superposition filtering method is used to calculate the roll diameter values ​​of the current unwinding reel 1 and the winding reel 3, with a resolution of 100ms and 20 superposition times, so as to calculate a stable roll diameter value (refresh rate 100ms), and obtain the accurate circumference and linear speed of the current unwinding reel 1 and the winding reel 3, so as to obtain a more accurate unwinding speed and winding speed of the base film 10 on the unwinding reel 1 and the winding reel 3, and then control the unwinding drive motor 11 and the winding drive motor 31 to run stably at the specified linear speed, and the tension stability control effect is better.

[0030] In the unwinding speed regulation and rewinding speed regulation steps, the unwinding drive motor 11 and the rewinding drive motor 31 after speed regulation respectively drive the unwinding shaft 1 and the rewinding shaft 3 to rotate between 0.9 and 1.1 times the current linear speed (the speed regulation amount is maintained within a certain and controllable limit range).

Claims

1. A control method for a tension control device of an organic coating device, characterized in that: The tension control device of an organic coating device comprises an unwinding shaft (1), a cold drum (2) and a winding shaft (3) for winding a base film (10) in sequence, an unwinding tension detection roller (4) is provided between the unwinding shaft (1) and the cold drum (2), a winding tension detection roller (5) is provided between the winding shaft (3) and the cold drum (2), a first sensor (6) for detecting unwinding tension and a second sensor (7) for detecting winding tension are provided on the unwinding tension detection roller (4) and the winding tension detection roller (5), respectively. A first detector (8) for detecting the coiling diameter of the unwinding shaft (1) and a second detector (9) for detecting the coiling diameter of the unwinding shaft (3) are respectively provided on one side of the reeling shaft (3); the tension control device further comprises a speed detector (20) for detecting the rotational linear speed of the cold drum (2) and a control module (100) which is electrically connected to the speed detector (20), the first sensor (6), the second sensor (7), the first detector (8) and the second detector (9) and can control the rotational angular speed of the unwinding shaft (1) and the reeling shaft (3); The control method of the tension control device of the organic coating equipment comprises the following steps: A: Film feeding, the unwinding drive motor (11) drives the unwinding shaft (1) to rotate, the cooling drum drive motor (21) drives the cooling drum to rotate, and the unwinding drive motor (11) drives the winding shaft (3) to rotate, thereby driving the base film (10) to move between the unwinding shaft (1), the cooling drum (2) and the winding shaft (3); B: speed measurement, the speed detector (20) detects the speed of the film and transmits the speed information to the control module (100); C: winding tension detection, the second sensor (7) detects the winding tension and transmits the winding tension information to the control module (100); D: unwinding tension detection, the first sensor (6) detects the unwinding tension and transmits the unwinding tension information to the control module (100); E: Determine the tension, the control module (100) determines whether the winding tension and the unwinding tension are equal to the target winding tension and the target unwinding tension, if the winding tension and the unwinding tension are equal to the target winding tension and the target unwinding tension, then there is no need to adjust the speed of the winding shaft (3) and the unwinding shaft (1); F: winding speed regulation, when the control module (100) determines that the winding tension is greater than the target winding tension, the control module (100) controls the winding drive motor (31) to decelerate through the PID controller; when the control module (100) determines that the winding tension is less than the target winding tension, the control module (100) controls the winding drive motor (31) to accelerate through the PID controller; until the control module (100) determines that the winding tension is equal to the target winding tension, the winding drive motor (31) maintains the current speed and continues to run; G: Unwinding speed regulation, when the control module (100) determines that the unwinding tension is greater than the target unwinding tension, the control module (100) controls the unwinding drive motor (11) to accelerate through the PID controller; when the control module (100) determines that the unwinding tension is less than the target unwinding tension, the control module (100) controls the unwinding drive motor (11) to decelerate through the PID controller; until the control module (100) determines that the unwinding tension is equal to the target unwinding tension, the unwinding drive motor (11) maintains the current speed and continues to run.

2. The control method of the tension control device of the organic coating equipment according to claim 1, characterized in that The cold drum (2) is provided with a cold drum driving motor (21) for driving its rotation and electrically connected to the control module (100); the unwinding shaft (1) is provided with an unwinding driving motor (11) for driving its rotation and electrically connected to the control module (100); the winding shaft (3) is provided with a winding driving motor (31) for driving its rotation and electrically connected to the control module (100).

3. The control method of the tension control device of the organic coating equipment according to claim 1 or 2, characterized in that A speed measuring roller (200) is provided between the cold drum (2) and the unwinding shaft (1), and the speed detector (20) adopts a speed encoder and is provided at the end of the speed measuring roller (200).

4. The control method of the tension control device of the organic coating equipment according to claim 1, characterized in that The first detector (8) and the second detector (9) both use laser rangefinders.

5. The control method of the tension control device of the organic coating equipment according to claim 1, characterized in that A guide roller (300) is provided between the unwinding shaft (1) and the cold drum (2), and between the winding shaft (3) and the cold drum (2).

6. The control method of the tension control device of the organic coating equipment according to claim 2, characterized in that The control module (100) is provided with a PID controller electrically connected to the unwinding drive motor (11) and the winding drive motor (31) to control the acceleration or deceleration thereof.

7. The control method of the tension control device of the organic coating equipment according to claim 1, characterized in that: The following steps are also included: H: Roll diameter detection. In the steps of winding speed regulation and unwinding speed regulation, the first detector (8) and the second detector (9) detect the roll diameters of the unwinding shaft (1) and the rewinding shaft (3) respectively, and transmit the corresponding roll diameter information to the control module (100). The control module (100) calculates the current circumferences of the unwinding shaft (1) and the rewinding shaft (3), and calculates the current linear speeds of the unwinding shaft (1) and the rewinding shaft (3).

8. The control method of the tension control device of the organic coating equipment according to claim 7, characterized in that In the coil diameter detection step, a two-second smoothing superposition filtering method is used to calculate the coil diameter values ​​of the current unwinding shaft (1) and the winding shaft (3), with a resolution of 100 ms and a superposition number of 20 times.

9. The control method of the tension control device of the organic coating equipment according to claim 7 or 8, characterized in that In the unwinding speed regulation and rewinding speed regulation steps, the unwinding drive motor (11) and the rewinding drive motor (31) after speed regulation respectively drive the unwinding shaft (1) and the rewinding shaft (3) to rotate at a speed between 0.9 and 1.1 times the current linear speed.

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