JP2627078B2 - Winding machine tension control device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a winding tension control device of a multi-axis winding machine for continuously winding a sheet having a small Young's modulus.

(Prior art) In order to wind a sheet material onto a winding roll accurately, a constant winding tension of an appropriate value is given to the sheet material to be wound,
It is necessary to keep the winding tension from fluctuating. The winding tension of the sheet is related to the torque of the winding roll, and the winding tension of the sheet determines the winding tension of the sheet. Therefore, if the torque of the take-up roll is accurately controlled, a desired take-up tension can be applied to the sheet-like material and this can be controlled accurately. However, a necessary torque is given to the take-up roll from the drive motor via a transmission mechanism such as a belt and a gear, so that a mechanical loss to the drive torque of the motor is caused by friction of the transmission mechanism between the drive motor and the take-up roll. Occurs. Therefore, in order to control the driving torque of the motor so that the winding tension is constant, it is necessary to control so that the torque obtained by subtracting the mechanical loss from the driving torque of the motor is constant. In order to solve these problems, the change in mechanical loss corresponding to the change in the winding speed and the change in mechanical loss corresponding to the change in the winding diameter of the winding roll with respect to the driving torque of the conventional motor are described. It is determined in advance by measurement and stored as a correction value, and according to a change in the winding speed at the time of winding and a change in the winding diameter of the winding roll, a command value of a torque for the drive motor is corrected by the stored correction value. That is being done.

(Problems to be Solved by the Invention) When a sheet-like material is wound by a multi-axis winding machine, the change in the machine speed affecting the winding torque includes the change in the winding speed during the above-described steady winding and the winding. Change in the winding diameter of the take-up roll,
There is a change in the rotation angle of the turret and a change in the rotation angle of the enveloper at the time of rewinding, in which the take-up roll is replaced with a standby empty roll that is full, and the motor drive torque corresponding to the change in the machine state is changed. The mechanical loss also changes, and in the case of winding a film or the like with a low tension, the ratio of the mechanical loss to the motor drive torque increases, and the motor drive determined in advance in response to the change in mechanical state There is a problem that the mechanical loss of torque temporally changes due to a change in lubrication state due to a change in the temperature of the machine due to continuous operation, and the change has a large effect on a change in winding tension. Was.

(Object of the Invention) The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a winding tension when a sheet-like material such as a film having a small Young's modulus is wound by a multi-axis winding machine. The mechanical loss of the motor drive torque corresponding to the change in the winding speed during steady winding and the change in the winding diameter of the winding roll, the change in the rotation angle of the turret and the rotation of the envelope The change in the winding tension of the film corresponding to the change in the angle is measured in accordance with the change in the state of the machine while performing the winding operation, and based on the measurement result, the drive motor used in the next winding cycle is measured. Tension control that enables the correct winding value to be obtained at a constant winding tension by constantly correcting the value close to the actual mechanical loss by finding the correction value for correcting the command value of the output torque. Provide equipment To be.

(Summary of the Invention) A winding tension control device for a winding machine according to the present invention is a tension control device for a multi-axis winding machine that continuously winds a sheet material on two or more winding rolls. Tension detecting means for detecting, a means for detecting a drive current of a motor for rotating the winding roll, a winding speed detecting means for detecting a winding speed, and a winding diameter detecting means for detecting a winding diameter of the winding roll. Means for detecting the rotation angle of the disk (turret) at the time of rewinding, Means for detecting the rotation angle of the enveloper, Means for detecting the drive current of the motor that rotates the idle roll in standby, A loss torque correction unit for keeping the tension constant even when the tension changes, the loss torque correction unit including a mechanical loss of a tension corresponding to a change in the winding speed at the time of steady winding with respect to the set tension. Store the correction value for correction A first storage unit and a second storage unit that stores a correction value for correcting a mechanical loss of tension corresponding to a change in the winding diameter, and replaces a full roll and an empty roll with respect to the set tension. A third storage unit for storing a correction value for correcting a change in tension corresponding to the rotation angle of the disk (turret) at the time of rewinding, and correcting a change in tension corresponding to the rotation angle of the enveloper And a fourth storage unit for storing a correction value for the first to fourth values of a tension value caused by a change in the winding state at the time of steady winding and at the time of rewinding. When the take-up roll is full, the standby empty roll is rotated until it reaches a predetermined rotational speed, and the rotational speed is incremented by a constant value. Corresponding to the number of revolutions The correction value to be stored in the first storage unit is obtained by detecting the motor drive current that has been detected, and the correction value to be stored in the second storage unit is determined by the winding diameter of the full roll and the standby position where the rewinding is completed. The rotation of the turret at the time of rewinding is determined by detecting the motor drive current at the number of rotations of the full roll that has reached the predetermined number of rotations and detecting the motor drive current at the number of rotations. The correction value stored in the fourth storage unit is obtained from the correspondence between the signal from the unit and the signal from the tension detection unit, and the correspondence between the signal from the rotation angle detection unit of the enveloper and the signal from the tension detection unit at the time of rewinding. The correction value of the winding tension used in the next winding cycle is automatically corrected while performing the winding operation.

(Example of the invention) Hereinafter, an example of the present invention will be described. FIG. 1 is a block diagram showing a winding tension control device for a winding machine according to the present invention. In FIG. 1, a film 1 which is a sheet-like material is fed in the direction of the arrow, and is taken up by a take-up roll 9 via a pinch roller 2, a leveling roller 3, a tension detecting roller 5, and a touch roller 7. Reference numeral 13 denotes a motor that drives the winding roll 9 via the transmission mechanism 11. Reference numeral 15 denotes a winding tension setting unit in which an appropriate tension is set for the film 1 to be wound. Reference numeral 17 denotes a line speed detecting unit for detecting the line speed of the film 1, and reference numeral 18 denotes a winding diameter calculating unit for calculating the winding diameter of the roll 9 from the speed detected by the line speed detecting unit and the number of rotations of the roll 9. Reference numeral 19 denotes a winding torque calculation unit that calculates a necessary drive torque from the tension set by the tension setting unit 15 and the winding diameter calculated by the winding diameter calculation unit 18 and obtains a corresponding motor drive current value. Is a drive current command section obtained by adding a drive current command value from the values input from the winding torque calculation section 19 and the loss torque correction section 37, and outputs the obtained current command value to the drive motor control section 23. . The drive motor control unit 23 drives the drive motor 13 with the commanded current value.
Numeral 25 denotes an empty roll which stands by for winding when the winding roll 9 is full, and numeral 27 denotes an empty roll when the winding from the full roll 9 to the empty roll 25 is performed. This is a turret for exchanging the position of the roll 25. Reference numeral 29 denotes an enveloper for moving the passing position of the film 1 so that the film 1 can be successfully wound on the empty roll when the winding roll 9 is full and the empty roll 25 is replaced. Reference numeral 33 denotes a drive motor for rotating the roll 25 via the transmission mechanism 31 and moves to the winding side together with the transmission mechanism 31 by the rotation of the turret 29. 35 is a drive motor control unit similar to 23. Reference numeral 37 denotes a loss torque correction unit for correcting a mechanical loss of the motor driving torque, which outputs an appropriate correction value corresponding to the change in the winding state and changes the winding state during winding. The data of the mechanical loss of the motor drive torque corresponding to the above is collected and data processing is performed to determine a correction value to be used in the next winding cycle (winding after replacing the winding roll). The value of the winding speed from the winding speed detector 39 and the winding diameter calculator are used as signals to detect changes in the winding state.
The value of the winding diameter of the winding roll from 18, the value of the turret rotation angle from the turret rotation angle detection unit 41, and the value of the envelope rotation angle from the enveloper rotation angle detection unit 43 are input to the loss torque correction unit 37. The correction value stored corresponding to each state is output to the drive current command unit 21. The value calculated by the winding diameter calculation unit 18 to determine the correction value and the detection unit
The values detected at 39, 41, and 43, the value of the tension input from the tension detection unit 45, the motor rotation speed and the value of the motor drive torque input from the drive motor control unit 35 are collected as data. FIG. 2 shows the details of the loss torque correcting section 37. In the figure, reference numeral 371 denotes a winding diameter calculating unit 18 and a detecting unit 3
A state determination unit that determines the state of winding based on signals input from 9, 41, and 43, and 373 stores a mechanical loss of torque associated with a change in winding speed in association with the winding speed. A storage unit 375 stores a mechanical loss of torque associated with a change in the weight (winding diameter) of the winding roll in accordance with the winding diameter, and a change unit 377 changes the rotation angle of the turret 27. A storage unit 379 stores the amount of change in torque associated with the rotation angle of the turret, and stores the amount of change in torque associated with the change in the rotation angle of the envelope 29 in correspondence with the rotation angle of the envelope. Reference numeral 3711 denotes an arithmetic unit including a microprocessor and a processing program, which reads a correction value corresponding to the state determined by the state determination unit 371 from the correction value storage units 373 to 379 and calculates a corresponding drive current value to perform correction. Input to the current value output section 3713 Outputted from the positive current value output unit 3713 to the correction value of the current to the drive current command unit 21. 3715 is a data collection unit that collects data input from each detection unit in order to obtain a correction value of the loss torque used in the next winding cycle.The data collection unit is collected here, the data is processed by the calculation unit 3711, and a new The mechanical loss of the torque corresponding to the change in the winding speed is stored in the storage unit 3732 as the correction value.
The mechanical loss of torque corresponding to the change in the winding diameter is shown in 3752, the torque change corresponding to the change in the rotation angle of the turret is stored in the storage unit 3772, and the change amount of the torque corresponding to the change in the rotation angle of the enveloper is stored in the storage unit 3792. Are respectively stored. When entering the next winding cycle, the correction data stored in each of the storage units 3732 to 3793 are transferred to the storage units 373 to 379, respectively. 372 is the storage unit 373, 375, 377, 379 in the initial state
This is a manual setting section for manually inputting a correction value to the. FIG. 3 shows the relationship between the change in the winding state, the correction of the mechanical loss of the motor driving torque corresponding to the change, and the data collection for determining the correction value used in the next winding cycle. FIG. 3A shows a steady winding state. In this state, the detected value of the winding speed from the winding speed detector 39 and the diameter of the winding roll 9 from the winding diameter calculator 18 are calculated. Based on the calculated value, the mechanical loss of the torque corresponding to the winding speed and the mechanical loss of the torque corresponding to the winding diameter of the winding roll 9 are read from the storage unit 373 and the storage unit 375. At 3711, a drive current value corresponding to the loss torque obtained by adding both the loss torques is obtained, and is output from the correction current value output unit 3713 to the drive current command unit 21. When the take-up roll 9 is almost full, the idle rotation of the empty roll 25 is performed by the drive motor 33 for rewinding. During the run-up rotation, the rotation speed was increased to the maximum rotation speed that occurred during winding, and the rotation speed was reduced in steps from that rotation speed to the minimum rotation speed during winding, and input from the drive motor control unit 35 during that time The rotation speed signal and the driving torque signal are stored in the data collecting unit 3715, processed by the calculation unit 3711, and stored in the storage unit 3732 as a mechanical loss value of the driving torque corresponding to the rotation speed. After collecting the data, the number of rotations is increased up to the number of run-up rotations for rewinding. FIG. 4A shows the relationship between the number of rotations and the motor drive current, and FIG. 4B shows the data collected by the data collection unit 3715.
FIG. 13C shows the correspondence between the correction data stored in the storage unit 3732 and the rotation speed. FIG. 3 (b) shows the state of rotation of the turret when the take-up roll becomes full and is replaced with an empty roll. In this state, the torque of the turret corresponding to the detected value of the rotation angle of the turret is shown. The amount of change is stored in the storage unit 37
It is read from 7 and output as a correction value. Further, the tension detected by the tension detection unit 45 corresponding to the rotation angle detected by the turret rotation angle detection unit 41 is read into the data collection unit 3715, and after performing data processing by the calculation unit 3711, the storage unit 3772 corresponds to the rotation angle of the turret. It is stored as a torque correction value. FIG. 5 shows the relationship between the tension for data collection and the rotation angle of the turret. FIG. 3 (c) shows the state of rewinding of the film 1 due to the rotation of the enveloper 29 after the rotation of the turret is completed. In this state, the amount of change in torque corresponding to the detected value of the rotation angle of the enveloper Is read from the storage unit 379 and output as a correction value. Further, the tension detected by the tension detection unit 45 corresponding to the rotation angle detected by the envelope rotation angle detection unit 43 is applied to the data collection unit 37.
After the data is read into 15 and processed by the arithmetic unit 3711, the storage unit 37 is used.
In 92, a torque correction value corresponding to the rotation angle of the enveloper is stored. FIG. 6 shows the state of changes in the rotation angle and the tension of the enveloper from which data is collected. FIG. 3 (c) shows a state in which the film 1 is cut, winding on the empty roll 25 is started, and the full roll is at the standby position. In this state, the full roll 9 is driven by the drive motor 13 to a predetermined position. The rotation speed signal and the drive torque signal that are rotated at the rotation speed and input from the drive motor control unit 35 are stored in the data collection unit 3715, and are calculated by the calculation unit 3711 (using data collected during the run-up rotation of the empty roll). And stored in the storage unit 3752 as a mechanical loss value of the driving torque corresponding to the winding diameter.

(Effect of the Invention) As described above, according to the winding tension control device of the winding machine of the present invention, the loss of the motor driving torque that changes in accordance with the state of the machine is appropriately corrected, so that the sheet-like material is always formed. Winding at a predetermined tension helps to improve product quality and hold, and furthermore, the correction value is automatically determined, so that the burden on the operator can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a winding tension control device for a winding machine according to the present invention, FIG. 2 is a diagram showing details of a loss torque correcting section 37 in FIG. 1, and FIGS. , (C) and (d) are diagrams showing the state of change in the winding state. FIGS. 4 (a), (b) and (c) show the mechanical loss of motor drive torque due to the change in winding speed. FIG. 5 is a diagram showing a relationship between data collected for correction and correction data, FIG. 5 is a diagram showing data collected for correcting a change in tension due to a change in the rotation angle of the turret, and FIG. FIG. 9 is a diagram showing data collected for correcting a change in tension due to a change in rotation angle.

Claims (1)

(57) [Claims] 1. A tension control device for a multi-spindle winder that continuously winds a sheet material on two or more take-up rolls, a tension detecting means for detecting a take-up tension, and a motor for rotating the take-up roll. Means for detecting the drive current of the motor, winding speed detecting means for detecting the winding speed, winding diameter detecting means for detecting the winding diameter of the winding roll, and detecting the rotation angle of the disk (turret) at the time of rewinding Means for detecting the rotation angle of the enveloper, means for detecting the drive current of the motor for rotating the idle roll, and loss torque correction for keeping the tension constant even when the state of the machine changes. A first memory for storing a correction value for correcting a mechanical loss of a tension corresponding to a change in a winding speed at the time of steady winding with respect to a set tension in the loss torque correction unit. And changes in the winding diameter A second storage unit for storing a correction value for correcting the mechanical loss of the applied tension, and a rotation angle of a disk (turret) when the full roll and the empty roll for the set tension are changed. A third storage unit that stores a correction value for correcting a change in tension corresponding to the rotation, and a fourth storage unit that stores a correction value for correcting a change in tension corresponding to the rotation angle of the envelope. Wherein the change in the tension caused by the change in the winding state at the time of steady winding and at the time of rewinding with respect to the set value is corrected by the correction value stored in the first to fourth storage units, When the take-up roll is full, the idle roll that is waiting to be replaced is rotated until it reaches a predetermined number of revolutions, and the motor drive current corresponding to the number of revolutions reduced by a certain value from that number of revolutions is reduced. By detecting The correction value to be stored in the first storage unit is obtained. The correction value to be stored in the second storage unit is determined by the winding diameter of the full roll and the full roll that has reached the standby position after the rewinding is completed. The correction value stored in the third storage unit is obtained from the signal from the turret rotation angle detection means and the tension detection means at the time of rewinding. And the correction value stored in the fourth storage unit is obtained from the correspondence between the signal from the rotation angle detection means of the enveloper and the signal from the tension detection means at the time of rewinding. A winding tension control device for a winding machine, wherein a correction value of a winding tension used in the next winding cycle is automatically corrected while performing.