Constant tension control device for grinding wheel screen cloth

Abstract

The invention relates to a grinding wheel screen cloth constant tension control device. Comprising a driving unwinding roller, a driving winding roller and five driving rollers, the driving unwinding roller and the driving winding roller are connected with a control system, the five driving rollers are arranged adjacently, and a grinding wheel gray fabric roll is arranged on the driving unwinding roller; the control system further comprises constant tension control systems, and the six tension control sections are each provided with one constant tension control system. The control system adopts sectional control, and the tension difference value of the previous tension control section and the next tension control section at the same time is controlled within a certain range, so that the tension fluctuation of the grey cloth in the conveying process is reduced, the smooth conveying of the grey cloth is realized, the stability and uniformity of tension and speed are improved, and the product quality is improved.

Description

Technical Field

[0001] The invention relates to the field of marine aquaculture, and in particular to a grinding wheel mesh constant tension control device. Background Art

[0002] In recent years, with the continuous increase of external grinding wheel mesh manufacturers, the market is facing increasingly fierce competition; on the other hand, the quality of the company's grinding wheel mesh products fluctuates, and a systematic solution is needed to improve the quality. The tension control and transmission of the grey cloth is an important link.

[0003] At present, during the surface treatment process of the grinding wheel mesh blank, the tension of the blank is mainly set by torque control between winding and unwinding. However, for applications with many processing links between winding and unwinding, this method is sometimes not stable and accurate enough for tension control in the intermediate links, resulting in lower product quality. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a grinding wheel mesh cloth constant tension control device.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a grinding wheel mesh constant tension control device, the innovation of which is: comprising:

[0006] An active unwinding roller, an active winding roller, and five adjacent active rollers connected to the control system, wherein a grinding wheel blank roll is arranged on the active unwinding roller;

[0007] The five active rollers include a second active roller, a third active roller, a fourth active roller, a fifth active roller and a sixth active roller, and a first tension control section is provided between the active unwinding roller and the second active roller, a second tension control section is provided between the second active roller and the third active roller, a third tension control section is provided between the third active roller and the fourth active roller, a fourth tension control section is provided between the fourth active roller and the fifth active roller, a fifth tension control section is provided between the fifth active roller and the sixth active roller, and a sixth tension control section is provided between the sixth active roller and the active winding roller;

[0008] The control system also includes a constant tension control system, and each of the six tension control sections is provided with a constant tension control system;

[0009] The control system adopts segmented control, which controls the tension difference between the previous tension control section and the next tension control section at the same time within a certain range to reduce the tension fluctuation of the grey cloth during transportation, thereby achieving smooth transportation of the grey cloth.

[0010] Furthermore, a plurality of guide rollers are arranged between the active unwinding roller and the second active roller, between two adjacent active rollers, and between the active winding roller and the sixth active roller.

[0011] Furthermore, the active unwinding roller, the active winding roller and all the active rollers are connected to a motor.

[0012] Furthermore, if tension sensors are installed on the active unwinding roller, the active winding roller and multiple active rollers, constant tension control between the unwinding, winding and active rollers can be achieved through tension closed-loop control to achieve smooth transportation of materials. When the tension sensor cannot be installed, constant tension control between the active rollers can be achieved through tension open-loop control to achieve smooth transportation of materials.

[0013] Furthermore, the control method of the control system comprises the following steps:

[0014] S1: Start;

[0015] S2: Setting the initial values ​​of parameters, including the initial speed values ​​and initial tension values ​​of the active roller and the tension roller in each tension control section;

[0016] S3: Real-time acquisition of the speed and torque of the active unwinding roller, each active roller, each tension roller and the active winding roller;

[0017] S4: Calculate in real time the actual tension value of the grey cloth in each tension control section according to the data obtained in S3, which is obtained by correcting the real-time difference in torque and speed between the previous active roller and the next active roller;

[0018] S5: If you choose to start the constant tension control system, then enter S6 to enter the constant tension operation mode, otherwise enter S7 to enter the zero tension operation mode;

[0019] S6: respectively calculating the difference between the actual tension value in S4 and the initial tension value set in S2, and calculating the difference between the speed obtained in S3 and the initial speed value set in S2, and entering S7;

[0020] S7: Realize multi-motor synchronous decoupling through PID controller control;

[0021] S8: adjusting the operating speed and torque of each motor;

[0022] S9: End.

[0023] The advantages of the present invention are:

[0024] There are many intermediate links between the unwinding and winding of the grinding wheel blank cloth, and the running distance of the blank cloth is long. In this method, a control method of a constant tension control system is added. By installing multiple active rollers between the active unwinding roller and the active winding roller, multiple tension control sections are formed. Segmented control is adopted. The tension difference between the previous tension control section and the next tension control section at the same time is controlled within a certain range to reduce the tension fluctuation of the blank cloth during transportation, thereby achieving smooth transportation of the blank cloth, improving the stability and uniformity of tension and speed, and improving product quality.

[0025] In addition, tension sensors are installed on the active unwinding roller, active winding roller and multiple tension control sections. At this time, tension closed-loop control is used to achieve constant tension control between unwinding, winding and active rollers, so as to achieve precise control of the active unwinding roller, active winding roller and each active roller. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a grinding wheel mesh constant tension control device of the present invention. DETAILED DESCRIPTION

[0027] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0028] like Figure 1 A grinding wheel mesh constant tension control device shown includes a control system and a PLC controller connected to the control system, an active unwinding roller 1, an active winding roller 7, and five active rollers adjacently arranged between the active unwinding roller 1 and the active winding roller 7, and the active unwinding roller 1, the active winding roller 7 and the five active rollers and the tension sensor are all electrically connected to the PLC controller.

[0029] A grinding wheel blank roll is provided on the active unwinding roller 1;

[0030] The five active rollers include a second active roller 2, a third active roller 3, a fourth active roller 4, a fifth active roller 5 and a sixth active roller 6, and a first tension control section 11 is provided between the active unwinding roller 1 and the second active roller 2, a second tension control section 12 is provided between the second active roller 2 and the third active roller 3, a third tension control section 13 is provided between the third active roller 3 and the fourth active roller 4, a fourth tension control section 14 is provided between the fourth active roller 4 and the fifth active roller 5, a fifth tension control section 15 is provided between the fifth active roller 5 and the sixth active roller 6, and a sixth tension control section 16 is provided between the sixth active roller 6 and the active winding roller 7;

[0031] The control system also includes 6 constant tension control systems, and the above six tension control sections are respectively connected to one of the constant tension control systems;

[0032] The control system adopts segmented control, which controls the tension difference between the previous tension control section and the next tension control section at the same time within a certain range to reduce the tension fluctuation of the grey cloth during transportation, thereby achieving smooth transportation of the grey cloth.

[0033] A guide roller is provided between the active unwinding roller 1 and the second active roller 2;

[0034] Five guide rollers are arranged between the second and third active rollers, and the guide roller closest to the third active roller 3 is connected to the third active roller 3 through a synchronous belt, and the guide roller closest to the third active roller 3 is also between the third and fourth active rollers, and a limiting roller 8 is also arranged on the side closest to the third active roller 3;

[0035] The limiting roller 8 is provided with a limiting gear, the limiting gear is meshed with a driven gear, and the driven gear is connected to the third active roller 3;

[0036] Five guide rollers are arranged between the fifth active roller 5 and the sixth active roller 6 .

[0037] The active unwinding roller 1, the active winding roller 7 and the five active rollers are all connected to motors.

[0038] The section between the active unwinding roller 1, the active winding roller 7 and the five active rollers is suitable for installing tension sensors, and constant tension control between the unwinding, winding and active rollers is achieved through closed-loop tension control.

[0039] For example, each active roller on the second tension control section 12 and the fourth tension control section 14 can directly drive the motor to adjust the speed of the corresponding active roller according to the tension value measured by the tension sensor, so as to achieve smooth transportation of materials.

[0040] In the section between the active rollers where it is inconvenient to install the tension sensor, constant tension control is achieved through open-loop control.

[0041] For example, in the third tension control section 13, since the grey cloth needs to be heated and dried, the third active roller 3 and the fourth active roller 4 cannot be equipped with tension sensors due to high temperature. In this case, the following control method can be used:

[0042] By acquiring the speed and torque of the third active roller 3 and the fourth active roller 4 in real time;

[0043] Then, the actual tension value of the grey cloth in the third tension control section 13 is calculated in real time according to the acquired data;

[0044] Then start the constant tension control system and enter the constant tension operation mode;

[0045] Then calculate the difference between the actual tension value and the initial tension value, and calculate the difference between the speed of the third active roller 3 and the fourth active roller 4 obtained in real time and the initial speed value, realize multi-motor synchronous decoupling through PID controller control, and adjust the operating speed and torque of the motor of the fourth active roller 4 to achieve constant tension control.

[0046] This control system uses PLC as a motion controller, and its control method includes the following steps:

[0047] S1: Start;

[0048] S2: Set the initial parameter values, including the initial speed values ​​and tension values ​​of the active roller and tension roller in each tension control section; different tension and speed parameters can be set for different product varieties, and the user can choose the corresponding best option to improve product quality.

[0049] S3: Real-time acquisition of the speed and torque of the active unwinding roller 1, each active roller, each tension roller and the active winding roller 7;

[0050] S4: Calculate the actual tension value of the grey cloth in each tension control section in real time according to the data obtained in S3. The actual tension value is obtained by correcting the real-time difference between the torque and speed of the previous active roller and the next active roller. In actual use, the torque and speed of the next active roller are adjusted first.

[0051] S5: If the constant tension control system is started, then enter S6 to enter the constant tension operation mode, otherwise enter S7 to enter the zero tension operation mode, at which time the running speed of the grey cloth on each active roller is consistent;

[0052] S6: respectively calculating the difference between the actual tension value in S4 and the initial tension value set in S2, and calculating the difference between the speed obtained in S3 and the initial speed value set in S2, and entering S7;

[0053] S7: Realize multi-motor synchronous decoupling through PID controller control;

[0054] S8: adjusting the operating speed and torque of each motor;

[0055] S9: End.

[0056] This control system can also realize functions such as user login and production statistics, which is the existing technology.

[0057] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A grinding wheel mesh constant tension control device, characterized in that: It includes an active unwinding roller, an active winding roller, and five adjacent active rollers connected to a control system, wherein a grinding wheel blank roll is arranged on the active unwinding roller; The five active rollers include a second active roller, a third active roller, a fourth active roller, a fifth active roller and a sixth active roller, and a first tension control section is provided between the active unwinding roller and the second active roller, a second tension control section is provided between the second active roller and the third active roller, a third tension control section is provided between the third active roller and the fourth active roller, a fourth tension control section is provided between the fourth active roller and the fifth active roller, a fifth tension control section is provided between the fifth active roller and the sixth active roller, and a sixth tension control section is provided between the sixth active roller and the active winding roller; The control system also includes a constant tension control system, and each of the six tension control sections is provided with a constant tension control system; The control system adopts segmented control, which controls the tension difference between the previous tension control section and the next tension control section at the same time within a certain range to reduce the tension fluctuation of the grey cloth during transportation, thereby achieving smooth transportation of the grey cloth.

2. A grinding wheel mesh constant tension control device according to claim 1, characterized in that: A plurality of guide rollers are arranged between the active unwinding roller and the second active roller, between two adjacent active rollers, and between the active winding roller and the sixth active roller.

3. A grinding wheel mesh constant tension control device according to claim 1, characterized in that: The active unwinding roller, the active winding roller and all the active rollers are connected to a motor.

4. A grinding wheel mesh constant tension control device according to claim 2, characterized in that: If tension sensors are installed on the active unwinding roller, active winding roller and multiple active rollers, constant tension control between unwinding, winding and each active roller is achieved through tension closed-loop control, thereby achieving smooth transportation of materials. If tension sensors cannot be installed, constant tension control between each active roller is achieved through tension open-loop control, thereby achieving smooth transportation of materials.

5. A grinding wheel mesh constant tension control device according to claim 1 or 2 or 3 or 4, characterized in that: The control method of the control system comprises the following steps: S1: Start; S2: Setting the initial values ​​of parameters, including the initial speed values ​​and initial tension values ​​of the active roller and the tension roller in each tension control section; S3: Real-time acquisition of the speed and torque of the active unwinding roller, each active roller, each tension roller and the active winding roller; S4: Calculate in real time the actual tension value of the grey cloth in each tension control section according to the data obtained in S3, which is obtained by correcting the real-time difference in torque and speed between the previous active roller and the next active roller; S5: If you choose to start the constant tension control system, then enter S6 to enter the constant tension operation mode, otherwise enter S7 to enter the zero tension operation mode; S6: respectively calculating the difference between the actual tension value in S4 and the initial tension value set in S2, and calculating the difference between the speed obtained in S3 and the initial speed value set in S2, and entering S7; S7: Realize multi-motor synchronous decoupling through PID controller control; S8: adjusting the operating speed and torque of each motor; S9: End.

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