JPH0584514A - Device for controlling tension - Google Patents

Abstract

PURPOSE:To prevent the generation of tension variation on the material by controlling the transferring speed of this material based on the speed standard that the speed standard of the coiler is made late by the prescribed time as the transferring speed standard of the material. CONSTITUTION:In the tension controlling device to control the tension of the material coiled with a coiler 5 based on the variation rate of the speed standard and the tension standard of the coiler 5, the speed standard VX that the speed standard VX of this coiler 5 is made late by the prescribed time is made as the transferring speed standard V of the material 1, and the transferring speed of the material 1 is controlled based on the above speed standard. Accordingly, the transferring speed standard V of the material 1 becomes the matter that the speed standard VX of the coiler 5 is made late by the prescribed time. Therefore, the generation of the tension variation of the material can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension control device for controlling the tension of a material wound by a winder.

[0002]

Conventionally, in the tension control device for controlling the tension of the material to be wound by the winding machine, deceleration time tension compensation is first rate of change of the speed reference V _x winder dV _x / d
Then, t was calculated, and the tension compensation amount was calculated based on this change rate. A tension reference value is obtained by adding the tension compensation amount to the tension set value, and the tension is controlled based on the tension reference value.

On the other hand, the control of the material conveying speed has been performed so that the conveying speed standard coincides with the speed standard of the winding machine.

[0004]

As described above, in the conventional tension control device, the amount of tension compensation at the time of acceleration / deceleration is performed by obtaining the rate of change of the speed reference of the winder, and the control of the material conveying speed is performed. Is performed so that the transport speed reference matches the winder speed reference V _x , so that when the tension compensation amount is obtained, the material transport speed reference is the next transport speed reference, and the tension compensation amount is the same. It does not correspond to the time when was obtained. Therefore, there is a problem that a proper tension reference cannot be obtained, and tension fluctuations or the like occur in the material.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tension control device capable of preventing fluctuations in tension of a material during acceleration / deceleration as much as possible. To do.

[0006]

A tension control device according to the present invention is a tension control device for controlling the tension of a material wound by a winder on the basis of a rate of change of a speed reference of the winder and the tension reference. The speed reference obtained by delaying the speed reference of the winder by a predetermined time is used as the material transfer speed reference,
It is characterized in that the transport speed of the material is controlled based on the transport speed reference.

[0007]

According to the tension control device of the present invention constructed as described above, the material conveyance speed reference is delayed from the winder speed reference by a predetermined time (time for obtaining the winder speed change rate). Becomes This makes it possible to prevent tension fluctuations in the material as much as possible.

[0008]

FIG. 1 shows the construction of an embodiment of the tension control device according to the present invention. The tension control device of this embodiment includes a winder speed setting means 11, a winder speed change rate calculating means 12,
Tension compensation amount calculation means 13, tension reference setting means 14,
An adder 15, a winder drive motor control means 16, a material conveying speed calculation means 17, and a pinch roll drive motor control means 18 are provided.

The material 1 is conveyed by a pinch roll 2 and wound on a winder 5 via a deflector roll 4. The pinch roll 2 is driven by a motor 3, and the winder 5 is driven by a motor 6.

The speed setting means 11 is a speed reference V for the winder 5.
Set _x . The speed change rate calculation means 12 uses the following formula (1) based on the set speed reference V _x and the winder 5
The speed change rate dV _x / dt of is calculated.

DV _x / dt = ΔV _x / Δt (1) where ΔV _x is the amount of change in the speed reference V _x during Δt time.

The tension compensation amount calculation means 13 obtains the tension compensation amount F _oc using the following equation (2) based on the speed change rate.

F _oc = K ₁ · dV _x / dt (2) Here, K ₁ is a compensation coefficient when the winder 5 is being accelerated or decelerated.

The tension reference setting means 14 sets the tension reference T _s of the material 1 wound by the winder 5. Adder 1
5 calculates a modified tension reference T which is the sum of the tension reference T _s and the tension compensation amount F _oc . Drive motor control means 16
Controls the motor 6 on the basis of the corrected tension reference T so that the tension of the material 1 wound by the winder 5 becomes the corrected tension reference.

The material conveying speed calculating means 17 has a time Δ required for calculating the speed change rate dV _x / dt of the winder 5.
The transport speed reference V of the material 1 is calculated so as to be the value of the speed reference V _x of the winder 5 delayed by t (see FIG. 3).

The motor control means 18 controls the motor 3 so that the conveying speed of the material 1 becomes the calculated conveying speed reference V.

Therefore, the transport speed reference V of the material 1 is delayed from the speed reference V _x of the winder 5 by the time Δt (see FIG. 2). As a result, the transport speed reference of the material 1 when the tension correction amount is calculated and the tension control is performed corresponds to the time when the tension correction amount is calculated (see FIG. 3).
It is possible to prevent the tension variation in the material 1 as much as possible.

[0018]

According to the present invention, it is possible to prevent fluctuations in tension of a material as much as possible.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a tension control device according to the present invention.

FIG. 2 is a graph showing a relationship between a wind speed reference and a material conveyance speed reference.

FIG. 3 is a graph showing a relationship between a wind speed standard and a material transport speed standard.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Material 2 Pinch roll 3 Pinch roll drive motor 4 Deflector roll 5 Winder 6 Winder drive motor 11 Winder speed setting means 12 Winder speed change rate calculation means 13 Tension compensation amount calculation means 14 Tension reference setting means 15 adder 16 winder drive motor control means 17 material transport speed calculation means 18 pinch roll drive motor control means

Claims (1)

[Claims] 1. A tension control device for controlling the tension of a material wound by the winder on the basis of a rate of change of a speed reference of the winder and a tension reference, wherein a speed reference of the winder is delayed by a predetermined time. A tension control device, wherein the speed reference is set as a transfer speed reference of the material, and the transfer speed of the material is controlled based on the transfer speed reference.