JPH04327455A - Winding control device for winding machine - Google Patents

Abstract

PURPOSE:To provide a winding control device capable of making two drums share equally the torque required for the acceleration/deceleration even at the accelerating/decelerating time of a winding machine. CONSTITUTION:A master drum 3 with sheet material 11 wound thereon as well as a slave drum 6 are in contact with the surface of a take-up coil on the way of being wound into coil shape. These drums are respectively driven according to the torque reference obtained by the comparison between the main speed reference and detected speed of the take-up coil 10. An acceleration/ deceleration rate computing means 12 computes the acceleration/deceleration rates of the main speed reference. An acceleration/deceleration torque computing means 13 computes the respective acceleration/deceleration torques of the master drum 3 and slave drum 6 on the basis of the computed acceleration/deceleration rates. An acceleration/deceleration correcting means 14 corrects torque reference applied to either one of the driving systems of the master drum 3 and slave drum 6 according to the difference between two computed acceleration/ deceleration torques.

Description

[Detailed description of the invention]

0001

[Field of Industrial Application] This invention relates to a two-drum winding machine that winds a sheet material into a coil shape using two drums with different roll diameters, and in particular, the two drums are driven in accordance with the main speed standard of the sheet material. The present invention relates to a winding control device.

0002

2. Description of the Related Art A conventional device of this type is shown in FIG. In the figure, a sheet material 11 is wrapped around a master drum 3. This master drum 3 and another slave drum 6 are each driven by an electric motor 4 while coming into contact with the surface of the winding coil 10 that is being wound up. In this case, the slave drum 6 has a diameter different from that of the master drum 3, and is in contact with the surface of the winding coil 10 at different positions in the horizontal direction.

On the other hand, the main speed reference for the sheet material 11 is generated by the speed reference generating means 1. This main speed reference and
The deviation from the detected speed of the speed detecting means 2 which detects the speed of the electric motor 4, converts it into the speed of the sheet material 11, and outputs it is added to the speed control means 5, where it is converted into a torque reference. This torque reference is applied equally to the drive system of the master drum 3 and the drive system of the slave drum 6. In the drive system of the master drum 3, the torque reference is converted into a current command for the electric motor 4 by the current control means 8, and further, the electric motor drive means 9 controls the current of the electric motor 4 based on this current command. On the other hand, in the drive system of the slave drum 6, after the torque reference is multiplied by a gain by the gain control means 7, it is converted into a current command for the electric motor 4 by the current control means 8, and then the electric motor is driven by this current command. Means 9 control the current of the motor 4.

[0004] The gain G of the gain control means 7 is calculated as shown in the following formula so that the master drum 3 and slave drum 6 apply the same rotational force to the winding coil 10 when the winding speed is constant. The ratio of the diameter of the slave drum 6 and the diameter of the master drum 3 is adjusted.

[0005] G=Ds/Dm

...(1) where Dm: diameter of master drum [m] Ds: diameter of slave drum [m].

[0006]

[Problems to be Solved by the Invention] The conventional winding control device described above is capable of controlling the master drum 3 as long as the winding speed is constant.
and slave drum 6 apply equal rotational force.

However, when accelerating or decelerating the winding speed of the sheet material 11, the force F generated on the surface of the master drum 3
m and the force Fs generated on the surface of the slave drum 6 differ from each other as shown in the following equation.

[0008]

[Equation 1] Where α: Main speed reference acceleration/deceleration rate [m/se
c]D: Winding coil diameter
[m] GD2: Moment of inertia of the winding coil [
kg·m 2 ] GD2 m : Moment of inertia of the master drum [kg·m 2 ] GD2 s : Moment of inertia of the slave drum [kg·m 2 ].

That is, even if the master drum 3 and the slave drum 6 try to share the torque necessary for accelerating and decelerating the winding coil 10, the torque required to drive the winding coil 10 will be reduced due to the difference in the diameters of these drums. Power could not be shared equally. For this reason, there was a problem in that the sheet material was wrinkled or misaligned.

This invention was made to solve the above problems, and even when the winding machine accelerates or decelerates, the torque necessary for accelerating or decelerating the winding coil is equally shared between the master drum and the slave drum. The purpose of the present invention is to obtain a winding control device that can perform the following steps.

[0011]

[Means for Solving the Problems] The present invention has a master drum that winds a sheet material and abuts against the surface of a winding coil that is being wound into a coil, and a master drum that has a diameter different from that of the master drum. and a winding control device for a winding machine that drives slave drums that are in contact with the surface of the winding coil at different positions, respectively, according to a torque standard that is a comparison between a main speed standard and a detected speed for the sheet material. acceleration/deceleration rate calculation means for calculating acceleration/deceleration rates based on speed; acceleration/deceleration torque calculation means for calculating respective acceleration/deceleration torques of the master drum and slave drum based on the calculated acceleration/deceleration rates; and acceleration/deceleration correction means for correcting the torque reference applied to the drive system of either the master drum or the slave drum so as to eliminate the difference in deceleration torque.

0012

[Operation] In this invention, the difference between the acceleration/deceleration torque of the master drum and the acceleration/deceleration torque of the slave drum is calculated based on the acceleration/deceleration rate based on the main speed, and depending on this difference, either the master drum or the slave drum is Since the torque reference applied to one of the drive systems is corrected, even when the winding device is accelerated or decelerated, the torque necessary for accelerating or decelerating the winding coil can be equally shared between the master drum and the slave drum.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and the same reference numerals as in the conventional device shown in FIG. 2 indicate the same elements. This differs from the conventional device shown in FIG. 2 in that it includes an acceleration/deceleration rate calculating means 12 that calculates the acceleration/deceleration rate based on the main speed, and an acceleration/deceleration rate calculating means 12 that calculates the acceleration/deceleration rate of the master drum 3 and slave drum 6 based on the calculated acceleration/deceleration rate. Acceleration/deceleration torque calculation means 13 for calculating, and acceleration/deceleration correction means 14 for calculating the difference between the two calculated acceleration/deceleration torques and correcting the speed deviation signal applied to the drive system of the slave drum in accordance with this difference. It has a configuration with the addition of.

The operation of this embodiment configured as described above will be explained below, focusing in particular on the parts that are different in configuration from the conventional device.

The main speed reference generated by the speed reference generating means 1 is applied to the acceleration/deceleration rate calculating means 12, where the following equation is calculated.

α=dV/dt
…
(4) However, α: acceleration/deceleration rate V: main speed reference.

Next, the acceleration/deceleration torque calculation means 13 uses the calculated acceleration/deceleration rate α to calculate the torques required to accelerate/decelerate the master drum 3 and slave drum 6, respectively, according to the following equations, that is, acceleration/deceleration torques Tm and Calculate Ts.

[0018]

##EQU00002## Therefore, the acceleration/deceleration correction means 14 calculates the deviation between the acceleration/deceleration torques Tm and Ts using the following equation.

[0019]

[Equation 3] The acceleration/deceleration correction means 14 further adds the deviation ΔTs to the speed deviation of the drive system of the slave drum 6 in order to compensate for this deviation ΔTs.

As a result, even when the sheet material 11 is accelerated or decelerated, the torque necessary for accelerating or decelerating the winding coil can be equally shared between the master drum and the slave drum.

In the above embodiment, the speed deviation of the drive system on the slave drum 6 side is corrected by the deviation of the acceleration/deceleration torque Tm of the master drum 3 and the acceleration/deceleration torque Ts of the slave drum 6. A similar result can be obtained even if the polarity is changed to correct the speed deviation of the drive system on the master drum 3 side.

[0022]

As is clear from the above description, according to the present invention, the difference in acceleration/deceleration torque between the master drum and the slave drum is calculated, and one of the master drum and the slave drum is adjusted to compensate for this difference. Since the deviation signal applied to the drive system is corrected, even when the winding device is accelerated or decelerated, the torque necessary for accelerating or decelerating the winding coil can be equally shared between the master drum and the slave drum.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of a winding control device of a conventional winding machine.

[Explanation of symbols]

1 Speed reference generation means 2 Speed detection means 3 Master drum 4 Electric motor 5 Speed control means 6 Slave drum 7 Gain control means 8 Current control means 9 Electric motor drive means 10 Winding coil 11 Sheet material 12 Acceleration/deceleration rate calculation means 13 Acceleration/deceleration torque calculation means 14 Acceleration/deceleration correction means

Claims (1)

[Claims] 1. A master drum that winds the sheet material and contacts the surface of the take-up coil during winding into a coil, and has a diameter different from that of the master drum,
and a winding control device for a winding machine that drives slave drums that are in contact with the surface of the winding coil at different positions, respectively, according to a torque standard that is a comparison between a main speed standard and a detected speed for the sheet material. acceleration/deceleration rate calculation means for calculating acceleration/deceleration rates based on speed; acceleration/deceleration torque calculation means for calculating respective acceleration/deceleration torques of the master drum and slave drum based on the calculated acceleration/deceleration rates; and acceleration/deceleration correction means for correcting the torque reference applied to the drive system of either the master drum or the slave drum so as to eliminate the difference in deceleration torque. Control device.