Automatic torque-changing cloth-winding method for cloth-winding machine

Abstract

The present invention relates to the technical field of cloth production, and provides an automatic torque-changing cloth-winding method for a cloth-winding machine, comprising the following steps: S1, a PC controller is arranged on a cloth-winding machine frame, the PC controller controls a servo motor to drive a cloth-pulling roller group and a cloth-winding roller, and a detection sensor is arranged at a cloth-outlet of a large circular machine to detect the speed information of cloth output and send it to the PC controller; S2, the cloth-outlet speed of the large circular machine is detected in real time by a detection sensor, and the detected cloth-outlet speed is converted into a voltage value and sent to the PC controller, and the linear proportional relationship established by the PC controller is to use a PID function to calculate the torque required for the cloth-winding speed of the cloth-winding shaft of the cloth according to the output voltage value Vrms converted by the cloth-outlet speed of the large circular machine, and convert it into the response frequency f required for the servo motor to realize the torque output, so as to realize the smooth cloth-winding of the cloth-winding roller on the cloth. The present invention solves the problem that the existing cloth-winding machine is inconvenient to change and adjust the cloth-winding for different types of cloth.

Description

Technical Field

[0001] The invention relates to the technical field of cloth production, and in particular to an automatic torque-changing cloth rolling method of a cloth rolling machine. Background Art

[0002] In the textile operation process, after the knitting machine (circular knitting machine) has finished weaving, the cloth must be pulled to a cloth rolling machine, and the cloth rolling machine is used to roll the cloth onto a cloth rolling shaft for easy transportation and storage. For example, Chinese Patent Publication No. 274319 discloses a "loom synchronous cloth rolling device", which has a cloth pulling mechanism and a cloth rolling mechanism. The cloth pulling mechanism can pull the cloth to pull the woven cloth into the cloth rolling device, and the cloth rolling mechanism is used to roll the cloth onto the cloth rolling shaft. However, in the known cloth rolling device, the cloth pulling shaft of the cloth pulling mechanism can only have a fixed torque, and the cloth pulling shaft cannot adjust the appropriate torque according to the different cloths. The cloth pulling shaft cannot be automatically adjusted for different cloths and different cloth delivery speeds. When the cloth delivery speed changes or the cloth rolling machine is replaced for different types of cloth, it is often necessary to stop the machine to adjust the cloth rolling machine so that the cloth can be rolled onto the cloth rolling shaft with appropriate tightness, which is inconvenient to adjust and use, and has low production efficiency. Summary of the invention

[0003] Therefore, in order to solve the above problems, the present invention proposes an automatic torque variable cloth winding method for a cloth winding machine which has a simple and reasonable structure, is easy to use, is suitable for automatic adjustment to different cloths or cloth delivery speed changes, has good cloth winding effect and high efficiency.

[0004] In order to solve this technical problem, the present invention adopts the following scheme: a method for automatically changing the torque of a cloth winding machine, comprising the following steps:

[0005] S1. A PC controller is arranged on the cloth winding machine frame, and the PC controller controls the servo motor to drive the cloth pulling roller group and the cloth winding roller, and a detection sensor is arranged at the cloth outlet of the circular knitting machine to detect the speed of the cloth output and send the speed information to the PC controller;

[0006] S2. The fabric output speed of the fabric outlet of the circular knitting machine is detected in real time by a detection sensor and the detected fabric output speed is converted into a voltage value and sent to the PC controller. The PC controller uses the PID function to calculate and adjust the rotation torque of the servo motor controlled by the PC controller according to the fabric output speed detected by the detection sensor, that is, the real-time output voltage value of the detection sensor is set to Vrms, which changes in the range of the minimum output voltage value Vmin of the detection sensor and the maximum output voltage value Vmax of the detection sensor. The real-time response frequency of the servo motor is set to f, and the real-time response frequency f of the servo motor changes in the range of the minimum response frequency fmin of the servo motor and the minimum response frequency fmax of the servo motor. A linear proportional relationship from small to large is established on the PC controller between the voltage value interval Vmin-Vmax of the detection sensor output and the response frequency interval fmin-fmax of the servo motor. The linear proportional relationship established by the PC controller uses the PID function to calculate the torque required for the cloth winding speed of the cloth winding shaft according to the output voltage value Vrms converted by the circular knitting machine's cloth delivery speed, and converts it into the response frequency f required for the servo motor to achieve the torque output. The PC controller converts the real-time output voltage value Vrms detected by the detection sensor into the response frequency f for controlling the operation of the servo motor according to the linear proportional relationship to control and adjust the response frequency f of the servo motor, so that the cloth winding machine automatically follows and adjusts the torque of the servo motor according to the circular knitting machine's cloth delivery speed to achieve smooth cloth winding of the cloth winding roller.

[0007] Furthermore, in the step S2, when calculating the torque F required for the cloth winding shaft to pull the cloth per unit length when winding the cloth, the PC controller calculates the torque F required for the cloth winding shaft to pull the cloth per unit length when winding the cloth in combination with the elastic deformation factor of the elasticity of the cloth, and then controls the response frequency f of the servo motor. The torque F required to pull the cloth per unit length is calculated according to the Hooke's law formula F=kx, wherein k is the Hooke's law stiffness coefficient constant of the cloth per unit length, F is the torque required to pull the cloth per unit length, and x is the elastic deformation of the cloth per unit length. The PC controller first calculates the torque F required to pull the cloth per unit length according to the elastic deformation x of the cloth per unit length and the stiffness coefficient k of the cloth per unit length, and then uses the PID function of the PC controller to calculate the torque F required to pull the cloth per unit length when the cloth winding speed of the cloth winding roller of the cloth is consistent with the cloth output speed of the circular knitting machine, and converts it into the response frequency f required for the servo motor to output the torque F required to pull the cloth per unit length.

[0008] Furthermore, in step S1, the output shaft of the servo motor is connected to the active roller of the cloth pulling roller group to drive the cloth pulling roller group to rotate, clamp and pull the cloth. One end of the active roller of the cloth pulling roller group is connected via a synchronous wheel group and drives the cloth winding roller to rotate and wind up the cloth.

[0009] Furthermore, the cloth pulling roller group is a rubber roller cloth pulling roller group.

[0010] By adopting the above technical solution, the beneficial effect of the present invention is as follows: by using the detection sensor to detect the cloth output speed of the cloth outlet of the large circular knitting machine in real time and converting the detected cloth output speed into a voltage value and sending it to the PC controller, a linear proportional relationship is established on the PC controller between the voltage value interval Vmin-Vmax converted by the detection sensor detecting the cloth output speed of the cloth outlet of the large circular knitting machine and the response frequency interval fmin-fmax of the servo motor operation, which corresponds from small to large. That is, the linear proportional relationship established by the PC controller is to use the PID function to calculate the torque required for the cloth winding speed of the cloth winding shaft according to the output voltage value Vrms converted by the circular knitting machine's cloth delivery speed, and convert it into the response frequency f required for the servo motor to achieve the torque output. The PC controller converts the real-time output voltage value Vrms detected by the detection sensor into the response frequency f for controlling the operation of the servo motor according to the linear proportional relationship to control and adjust the response frequency f of the servo motor, so that the cloth winding machine automatically follows and adjusts the torque of the servo motor according to the cloth delivery speed of the circular knitting machine to achieve smooth cloth winding of the cloth winding roller. The structure is simple and reasonable, easy to use, suitable for automatic adjustment of different cloths or cloth delivery speed changes, good cloth winding effect, and high efficiency. Through further settings, the PC controller also combines the elastic deformation factor of the elasticity of the cloth to coordinately control the response frequency f of the servo motor. The torque pulling the cloth is calculated according to the Hooke's law formula F=kx. The PC controller first calculates the torque F required for rolling the cloth per unit length according to the elastic deformation x of the cloth per unit length and the stiffness coefficient k of the cloth per unit length, and then uses the PID function of the PC controller to calculate the torque required for the cloth winding roller to keep the cloth winding speed of the cloth consistent with the cloth delivery speed of the circular knitting machine, and converts it into the response frequency f required for the servo motor to achieve the torque output, so that the cloth winding machine for cloths with different elasticity can also automatically follow and adjust the torque of the servo motor according to the cloth delivery speed of the circular knitting machine to achieve smooth cloth winding of the cloth winding roller, further enhancing the application scope of the cloth winding machine and ensuring the automatic and smooth cloth winding of the cloth winding machine, effectively eliminating the problem that the cloth winding machine cannot be adaptively adjusted due to different elasticity of the cloth, and can be widely promoted and applied. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a partial three-dimensional structural schematic diagram of a cloth winding machine in an embodiment of the present invention;

[0012] Figure 2 It is a schematic diagram of the front structure of the cloth winding machine in an embodiment of the present invention. DETAILED DESCRIPTION

[0013] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods, wherein the PC controller, servo motor, cloth pulling roller group, cloth winding roller, and detection sensor are all existing structural components, and therefore a specific structural description is no longer given in the specification, and the new design part is described in detail in the following embodiments.

[0014] refer to Figure 1 and Figure 2 The preferred automatic torque-changing cloth-winding method of the cloth-winding machine of the present invention comprises the following steps:

[0015] S1. A PC controller is arranged on the cloth rolling machine frame 1. The PC controller controls the servo motor 2 to drive the cloth pulling roller group 3 and the cloth rolling roller 4. The output shaft of the servo motor 2 is connected to the active roller 31 of the cloth pulling roller group 3 to drive the cloth pulling roller group 3 to rotate, clamp and pull the cloth. One end of the active roller 31 of the cloth pulling roller group 3 is connected via the synchronous wheel group 5 and drives the cloth rolling roller 4 to rotate and rewind the cloth. A detection sensor is arranged at the cloth outlet of the large circular knitting machine to detect the speed information of the cloth output and send it to the PC controller.

[0016] S2. The fabric output speed of the fabric outlet of the circular knitting machine is detected in real time by the detection sensor and the detected fabric output speed is converted into a voltage value and sent to the PC controller. The PC controller uses the PID function to calculate and adjust the rotation torque of the servo motor controlled by the PC controller according to the fabric output speed detected by the detection sensor, that is, the real-time output voltage value of the detection sensor is set to Vrms, which changes in the interval between the minimum output voltage value Vmin of the detection sensor and the maximum output voltage value Vmax of the detection sensor. The real-time response frequency of the servo motor is set to f, and the real-time response frequency f of the servo motor changes in the interval between the minimum response frequency fmin of the servo motor and the minimum response frequency fmax of the servo motor. A linear proportional relationship is established on the PC controller, from small to large, between the voltage value interval Vmin-Vmax of the detection sensor output and the response frequency interval fmin-fmax of the servo motor. For example, the Vmin-Vmax interval is an analog value of 0V-10V, and the response frequency interval fmin-fmax of the servo motor is 0Hz-50Hz. When Vrms= 0V, the corresponding response frequency f of the servo motor is 0HZ. When Vrms = 10V, the corresponding response frequency of the servo motor is f = 50V. When Vrms = 5V, the corresponding response frequency of the servo motor is f = 25Hz. The linear proportional relationship established by the PC controller uses the PID function to calculate the torque required for the cloth winding speed of the cloth winding shaft according to the output voltage value Vrms converted by the large circular machine cloth delivery speed, and converts it into the response frequency f required for the servo motor to achieve the torque output. The PC controller converts the real-time output voltage value Vrms detected by the detection sensor into the response frequency f for controlling the operation of the servo motor according to the linear proportional relationship to control and adjust the response frequency f of the servo motor. When calculating the torque F required for the cloth winding shaft to pull a unit length of cloth when winding the cloth, the PC controller combines the elastic deformation factor of the elasticity of the cloth to calculate the torque F required for the cloth winding shaft to pull a unit length of cloth when winding the cloth, and then controls the response frequency f of the servo motor. The torque F is calculated based on the Hooke's law formula F=kx, where k is the Hooke's law stiffness coefficient constant of the fabric per unit length, F is the torque required to pull the fabric per unit length, and x is the elastic deformation of the fabric per unit length. The PC controller first calculates the torque F required to pull the fabric per unit length based on the elastic deformation x of the fabric per unit length and the stiffness coefficient k of the fabric per unit length, and then uses the PID function of the PC controller to calculate the torque F required to pull the fabric per unit length when the fabric winding speed of the fabric roller is consistent with the fabric delivery speed of the circular knitting machine, and converts it into the response frequency f required for the servo motor to output the torque F required to pull the fabric per unit length, so that the fabric winding machine automatically follows and adjusts the torque of the servo motor according to the fabric delivery speed of the circular knitting machine to achieve smooth fabric winding of the fabric roller.

[0017] In the present invention, the cloth pulling roller group uses a rubber roller cloth pulling roller group for better effect. The detection sensor can be a speed sensor or a displacement sensor, etc., which can detect the cloth conveying speed and convert the detection information into a piezoelectric sensor of a voltage signal value.

[0018] The present invention detects the cloth output speed of the cloth outlet of the circular knitting machine in real time by using a detection sensor and converts the detected cloth output speed into a voltage value and sends it to a PC controller, thereby establishing a linear proportional relationship from small to large between the voltage value interval Vmin-Vmax converted by the detection sensor detecting the cloth output speed of the cloth outlet of the circular knitting machine and the response frequency interval fmin-fmax of the servo motor operation, That is, the linear proportional relationship established by the PC controller is to use the PID function to calculate the torque required for the cloth winding speed of the cloth winding shaft according to the output voltage value Vrms converted by the circular knitting machine's cloth delivery speed, and convert it into the response frequency f required for the servo motor to achieve the torque output. The PC controller converts the real-time output voltage value Vrms detected by the detection sensor into the response frequency f for controlling the operation of the servo motor according to the linear proportional relationship to control and adjust the response frequency f of the servo motor, so that the cloth winding machine automatically follows and adjusts the torque of the servo motor according to the cloth delivery speed of the circular knitting machine to achieve smooth cloth winding of the cloth winding roller. The structure is simple and reasonable, easy to use, suitable for automatic adjustment of different cloths or cloth delivery speed changes, good cloth winding effect, and high efficiency. Through further settings, the PC controller also combines the elastic deformation factor of the elasticity of the cloth to coordinately control the response frequency f of the servo motor. The torque pulling the cloth is calculated according to the Hooke's law formula F=kx. The PC controller first calculates the torque F required for rolling the cloth per unit length according to the elastic deformation X of the cloth per unit length and the stiffness coefficient K of the cloth per unit length, and then uses the PID function of the PC controller to calculate the torque required for the cloth winding roller to keep the cloth winding speed of the cloth consistent with the cloth delivery speed of the circular knitting machine, and converts it into the response frequency f required for the servo motor to achieve the torque output, so that the cloth winding machine for cloths with different elasticity can also automatically follow and adjust the torque of the servo motor according to the cloth delivery speed of the circular knitting machine to achieve smooth cloth winding of the cloth winding roller, further enhancing the application scope of the cloth winding machine and ensuring the automatic and smooth cloth winding of the cloth winding machine, effectively eliminating the problem that the cloth winding machine cannot be adaptively adjusted due to different elasticity of the cloth, and can be widely promoted and applied.

[0019] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A cloth winding method with automatic torque-changing cloth winding machine, characterized in that: The following steps are involved: S1. A PC controller is arranged on the cloth winding machine frame, and the PC controller controls the servo motor to drive the cloth pulling roller group and the cloth winding roller, and a detection sensor is arranged at the cloth outlet of the circular knitting machine to detect the speed of the cloth output and send the speed information to the PC controller; S2. The fabric output speed of the fabric outlet of the circular knitting machine is detected in real time by a detection sensor and the detected fabric output speed is converted into a voltage value and sent to the PC controller. The PC controller uses the PID function to calculate and adjust the rotation torque of the servo motor controlled by the PC controller according to the fabric output speed detected by the detection sensor, that is, the real-time output voltage value of the detection sensor is set to Vrms, which changes in the range of the minimum output voltage value Vmin of the detection sensor and the maximum output voltage value Vmax of the detection sensor. The real-time response frequency of the servo motor is set to f, and the real-time response frequency f of the servo motor changes in the range of the minimum response frequency fmin of the servo motor and the minimum response frequency fmax of the servo motor. A linear proportional relationship from small to large is established on the PC controller between the voltage value interval Vmin-Vmax of the detection sensor output and the response frequency interval fmin-fmax of the servo motor. The linear proportional relationship established by the PC controller uses the PID function to calculate the torque F required for the cloth winding shaft to reel in the cloth and pull the unit length of cloth according to the output voltage value Vrms converted by the circular knitting machine's cloth delivery speed, and converts it into the response frequency f required for the servo motor to achieve the torque output. The PC controller converts the real-time output voltage value Vrms detected by the detection sensor into the response frequency f for controlling the operation of the servo motor according to the linear proportional relationship to control and adjust the response frequency f of the servo motor, so that the cloth winding machine automatically follows and adjusts the torque of the servo motor according to the circular knitting machine's cloth delivery speed to achieve smooth cloth winding of the cloth winding roller.

2. The automatic torque-changing cloth winding method of a cloth winding machine according to claim 1, characterized in that: When calculating the torque F required for the cloth winding shaft to pull the cloth per unit length when winding the cloth in step S2, the PC controller calculates the torque F required for the cloth winding shaft to pull the cloth per unit length when winding the cloth in combination with the elastic deformation factor of the elasticity of the cloth, and then controls the response frequency f of the servo motor. The torque F required to pull the cloth per unit length is calculated according to the Hooke's law formula F=kx, wherein k is the Hooke's law stiffness coefficient constant of the cloth per unit length, F is the torque required to pull the cloth per unit length, and x is the elastic deformation of the cloth per unit length. The PC controller first calculates the torque F required to pull the cloth per unit length according to the elastic deformation x of the cloth per unit length and the stiffness coefficient k of the cloth per unit length, and then calculates the torque F required to pull the cloth per unit length when the cloth winding speed of the cloth winding roller of the cloth is consistent with the cloth output speed of the circular knitting machine by the PID function of the PC controller, and converts it into the response frequency f required for the servo motor to output the torque F required to pull the cloth per unit length.

3. The automatic torque-changing cloth winding method of a cloth winding machine according to claim 1, characterized in that: In step S1, the output shaft of the servo motor is connected to the active roller of the cloth pulling roller group to drive the cloth pulling roller group to rotate, clamp and pull the cloth. One end of the active roller of the cloth pulling roller group is connected via a synchronous wheel group and drives the cloth winding roller to rotate and wind up the cloth.

4. The automatic torque-changing cloth winding method of a cloth winding machine according to claim 3, characterized in that: The cloth pulling roller group is a rubber roller cloth pulling roller group.

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