JPH0451463B2 - - Google Patents

Description

[Detailed description of the invention] [Objective of the invention] (Industrial application field) The present invention optimally controls the winding stiffness when winding materials in a continuous processing line for paper, film, iron, etc., strips. The present invention relates to a winding tightness control device.

(Prior Art) Conventionally, in continuous pressure processing lines for paper, film, iron, and other strips, winder equipment has been used to wind the material. The firmness control system is shown in the block diagram of FIG.

As shown in the figure, the rewinding coil 1A is driven by an electric motor 2 for driving the rewinding coil. This electric motor 2 is driven by an electric motor drive device 3. Tension control circuit 4 is unwinding coil 1A
Apply tension to the material 1B that has been rewound. The taper tension setter 5 outputs a taper tension setting value and sends it to the tension control circuit 4. Each of the first and second drums 6 and 7 has a winding coil 1C.
It is rotated by drum drive electric motors 8 and 9 to drive the drum. Electric motor drive devices 10 and 11 drive drum drive electric motors 8 and 9. Note that the torque difference control circuit 12 generates a torque difference between the drums 6 and 7, and this torque difference is set by the torque difference setting device 13. On the other hand, the rider roll 14 has the function of pressing the winding coil 1C from above, and the pressing pressure is generated by the pressure unit 15. The rider pressure control circuit 16 outputs a pressure value to the pressure unit 15, and the pressure setting value is given from the rider pressure setting value 17. The winding coil diameter signal 18 is input as a parameter to each of the taper tension setting device 5, the torque difference setting device 13, and the rider pressure setting device 17.

In such a configuration, for a given winding coil diameter signal 18, a taper tension setting value as shown in the characteristic diagram of FIG. 5, a torque difference setting value as shown in the characteristic diagram of FIG. 6, The set values of the rider pressurization as shown in the characteristic diagram of Fig. 7 are respectively set by the taper tension setting device 5 and the torque difference setting device 1.
3. Set by each setting device of the rider pressure setting device 17.

In this case, the taper tension value is controlled by the action of the tension control circuit 4 in such a direction that the tension applied to the material is weakened as the diameter of the wound coil increases. On the other hand, the torque difference value is the torque control circuit 1
2, the torque of drum 7 is greater than the torque of drum 6 at the beginning of winding, and the torque of drum 7 is greater at the end of winding.
The torque is controlled by applying a torque to the drums 6 and 7 such that the torque of the drum 6 is smaller than the torque of the drum 6. Further, the rider pressure value is determined by the action of the rider pressure control circuit 16, which applies pressure to the rider roll 14 from the pressure unit 15 such that the pressure applied to the winding coil is strong at the beginning of winding, and the pressure is weakened at the end of winding. controlled by

As a result, the winding coil 1C is wound more tightly as it is closer to the core side, and more loosely as it is closer to the outside.
By controlling the winding stiffness in this way, it is possible to reduce the weight applied to the core of the wound coil, and also to reduce the gap between the materials in the core, which prevents wrinkles from forming on the core during winding. can be prevented and product quality can be improved.

(Problem to be solved by the invention) However, in the conventional winding stiffness control device, the amount of winding stiffness with respect to change in coil diameter cannot be quantitatively grasped. We had no choice but to rely on the visual inspection of staff. Also,
Since the control itself is performed in an open loop with respect to the amount of winding firmness, the control accuracy of the winding firmness is low, and there is a limit to the improvement of product quality.

Therefore, an object of the present invention is to provide a winding stiffness control device that solves the problems with the controllability of the prior art and is capable of realizing highly accurate winding stiffness control by quantitatively detecting the winding stiffness amount. It is about providing.

[Structure of the Invention] (Means for Solving the Problems) The winding stiffness control device of the present invention includes a drive system that provides a winding stiffness amount when winding a continuous material onto a winding device, and a winding a calculation means for calculating the winding stiffness of the material to be wound from the length detection signal, the weight value per unit plane area, the material width, and the coil diameter of the winding coil; a setting means that can set the amount of winding stiffness for each material; and a correction means that sends a deviation signal between the set value by the setting means and the calculated value calculated by the calculating means to the drive system as a winding stiffness correction signal. It is characterized by having the following.

(Function) According to the winding stiffness control device of the present invention, the winding stiffness amount is quantitatively detected, and this is compared with a set value calculated from the material and the winding coil diameter to determine the deviation value of the winding stiffness. By applying this deviation value as a correction value to the drive system that determines the amount of winding stiffness, a desired amount of winding stiffness can be obtained.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a winding tightness control device according to an embodiment of the present invention, in particular a taper tension setting device 5 and a torque difference setting device 1 in the configuration shown in FIG.
3. This is an example of a configuration for providing a correction value to the rider pressure setting device 17. In the same figure, the winding stiffness calculator 19 receives a winding coil diameter signal 18, a pulse signal 20 for calculating the winding length from a pulse generator (not shown) attached to the electric motor 8 connected to the drum 6, and a digital The amount of winding stiffness is calculated from the weight value signal 21 representing the weight value per unit plane area of the material to be wound, which is set on a setting device such as a switch, the material width signal 22, etc., and the winding stiffness calculation value signal 2
Outputs 3. On the other hand, the winding stiffness setting device 24 uses a material brand N signal 25 to change the setting of the winding stiffness amount.
A winding stiffness setting value signal 26 is generated from the coil diameter signal 18. The subtractor 27 is the winding stiffness setting device 2.
4 and the winding stiffness value signal 23 from the winding stiffness calculator 19,
A winding stiffness deviation amount is calculated and a deviation amount signal 27A is sent to proportional integrators 28A, 28B, and 28C. Proportional integrators 28A, 28B, and 28C convert the deviation amount signal 27A into new deviation amount signals 29A, 29B, and 29C that take into account the PI element, respectively. The weighting coefficient generators 30A, 30B, and 30C generate the deviation amount signal 2.
Winding 9A, 29B, 29C and coil diameter signal 1
Weighting coefficient signal 31A for correcting for 8,
31B and 31C are generated. The weighting coefficients from these weighting coefficient signals 31A, 31B, 31C are multiplied by the deviation amounts from the deviation amount signals 29A, 29B, 29C, respectively, by multipliers 32A, 32B, 32C to produce correction signals 33A, 33 containing the weighting coefficients.
B and 33C are obtained and sent to the taper tension setting device 5, torque difference setting device 13, and rider pressure setting device 17, respectively. Other aspects are the same as those in Figure 4.

In this configuration, the winding stiffness calculator 19 calculates the amount of change ΔD in the cross-sectional area corresponding to the change in the winding coil diameter Δr from the winding coil diameter signal 18 every time the pulse signal 20 reaches a unit winding length. is determined and multiplied by the material width according to the material width signal 22 to calculate the volume change amount ΔV of the winding coil 1C. On the other hand, multiply the unit winding length by the material width to calculate the plane area per unit winding length of the material to be wound, and then multiply this by the weight value per unit plane area to calculate the plane area per unit winding length. Calculate the weight change amount ΔW. The winding stiffness, that is, the density is obtained by dividing the weight change amount ΔW by the volume change amount ΔV, and the winding stiffness calculator 19 outputs this as the winding stiffness calculation value signal 23.

On the other hand, in order to prevent the occurrence of wrinkles in the core portion of the winding coil diameter, the winding stiffness setting device 24 has a coil density that is relatively high at the beginning of winding and at the end of winding, as shown in the characteristic diagram of FIG. A relatively low density setting is set for the winding coil diameter signal 18 in correspondence with the brand number signal 25 for each brand of material, and is output as a winding stiffness setting value signal 26.

A subtractor 27 calculates a deviation between the winding stiffness calculation value signal 23 and the winding stiffness setting value signal 26, and a deviation amount signal 27A is output. The deviation amount signal 27A is supplied to the taper tension setter 5, the torque difference setter 13,
The signals are input to proportional integrators 28A, 28B, and 28C provided corresponding to the rider pressure setting device 17, and output deviation amount signals 29A, 29B, and 29C. Here, when the sign of the deviation amount signal 27A is positive, it indicates that the winding stiffness is insufficient, and each proportional integrator is configured so that the deviation amount signals 29A, 29B, and 29C are all positive. There is.

The weighting factor generators 30A, 30B, and 30C are used to keep the responses of the taper tension control system, torque difference control system, and rider pressure control system constant even if the winding coil diameter changes and GD ² increases. do.
For example, in a torque difference control system, the response at the beginning of winding is fast and the response at the end of winding is slow. In this case, the proportional integrators 28A and 28
In order to increase the gains of B and 28C, weighting coefficient signals 31A and 28C having values as shown in the characteristic diagram of FIG.
31B, 31C, deviation value signals 29A,
By multiplying by 29B and 29C, the response of the control system is improved. Optimal control can also be achieved for other control systems by changing the weighting coefficients with respect to the winding coil diameter.

The correction signal 33 weighted in this way
A, 33B, and 33C are input to the taper tension setting device 5, the torque difference setting device 13, and the rider pressure setting device 17. Each setter 5, 13, 17 adds the correction by the correction signals 33A, 33B, 33C to the conventional setting value, and sets the corresponding control circuit 4, 1
A taper tension set value signal, a torque difference set value signal, and a rider pressurization set value signal are sent to the motors 2 and 16, respectively.

Each of these setting values is corrected in the direction of increasing the winding stiffness when the winding stiffness is insufficient, so as the taper tension setting value increases, the tension applied to the material increases, and the torque difference setting value increases. As a result, the torque of the drum 7 increases more than the torque of the drum 6, and as the rider pressure setting increases, the pressure applied to the winding coil from above increases. For this reason, the winding coil is wound more tightly, and the lack of winding tightness can be resolved.

On the other hand, if the winding stiffness is too strong, a reverse feedback control system is activated to eliminate the excessive winding stiffness.

Note that if the winding stiffness calculation value signal 23 can be checked with a recorder or the like, the degree of winding stiffness can be quantitatively checked.

〔Effect of the invention〕

According to the present invention, by providing a means for calculating the amount of winding tightness, it is possible to continuously and quantitatively check the winding tightness, which conventionally relied only on visual inspection by an operator, and to improve the winding tightness. A winding stiffness control device that can always ensure the required amount of winding stiffness and obtain high-quality wound coils by making corrections to each set value that affects the winding stiffness according to the amount of winding stiffness. can be provided.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a winding stiffness control device according to an embodiment of the present invention, FIG. 2 is a characteristic diagram of coil density setting, FIG. 3 is a characteristic diagram of weighting coefficients for the torque difference control system, and FIG. The figure is a block diagram of a conventional winding stiffness control device, Figure 5 is a characteristic diagram showing tension settings, Figure 6 is a characteristic diagram showing torque difference settings, and Figure 7 is a characteristic diagram showing rider pressure settings. . 4...Tension control system, 5...Taper tension setting device, 12...Torque difference control circuit, 13
... Torque difference setting device, 16 ... Rider pressure control circuit, 17 ... Rider pressure setting device, 19 ... Winding stiffness calculator, 24 ... Winding stiffness setting device, 28
A, 28B, 28C...proportional integrator, 30A, 3
0B, 30C...Weighting coefficient generator.

Claims (1)

[Claims] 1. A drive system that provides the amount of winding stiffness when winding a continuous material onto a winding device, a detection signal for winding length, a weight value per unit plane area, material width, and winding. A calculation means for calculating the amount of winding stiffness of the material to be wound from the coil diameter of the coil, a setting means for setting a predetermined amount of winding stiffness for each material corresponding to the coil diameter of the winding coil, and a set value by this setting means. and a correction means for sending a deviation signal between the calculated value and the calculated value calculated by the former calculation means to the drive system as a correction signal for the winding stiffness. 2. A tension control system in which the drive system controls the tension of the unwinding coil, a winding torque difference control system that controls the winding torque difference of the winding coil,
The winding tightness control device according to claim 1, further comprising a rider pressure control system that presses the winding coil. 3. means for the correction means to proportionally integrate the deviation signal;
2. The winding stiffness control device according to claim 1, further comprising means for multiplying this by a response delay corresponding to the winding coil diameter as a weighting coefficient.