JPH066208B2 - Winding control device - Google Patents

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a winding control device when winding a rolled material rolled by a rolling machine such as a hot strip mill by a winding device such as a mandrel, and particularly, The present invention relates to a winding control device that controls a material speed and a winding tension so as not to largely change after the end of rolling to the completion of winding.

[Technical background of the invention and its problems]

FIG. 4 shows a mechanical arrangement of a general rolling mill, for example, a hot strip mill, in which a rolled material 2 rolled by the rolling mill 1 is wound via a hot run table 3 and a pinch roll 4 into a winding device, for example, a mandrel. Winded up to 5.

During winding, tension control is performed to obtain good winding characteristics. That is, during rolling (the period in which the tail end of the rolled material 2 is caught in the rolling mill 1), the tension of the rolled material 2 is set between the rolling mill 1, the pinch roll 4 and the mandrel 5 to a set tension. After the tail end of the rolled material 2 has passed through the rolling mill 1, the tension of the rolled material between the pinch roll 4 and the mandrel 5 is controlled to be the set tension. In FIG. 4, D is the coil diameter of the mandrel 5, and F is the winding tension.

Conventionally, when performing the above tension control, the tension applied to the rolled material 2 is controlled by controlling the current of the driving motor of the mandrel 5 and controlling the speed of the driving motor of the rolling mill 1 or the driving motor of the pinch roll 4. I was trying to reach the set tension. That is, the winding speed of the rolled material 2 is determined by controlling the speed of the rolling mill 1 or the pinch roll 4, and the tension applied to the rolled material 2 is controlled by controlling the electric current of the driving motor of the mandrel 5.

Such a conventional winding control device is shown in FIGS. 5 (a) and 5 (b).
Shown in. FIG. 5A is a block diagram showing a control device for the pinch roll 4, and FIG. 5B is a block diagram showing a control device for the mandrel 5.

In FIG. 5A, 10 is a DC motor for driving a pinch roll, and a speed generator 11 is mechanically coupled to this motor 10. Then, the output of the speed generator 11 and the output of the reference generator 12 are subtracted by the subtractor 13, and the speed deviation signal which is the output of the subtractor 13 is input to the speed control amplifier 14. The current reference signal that is the output of the speed control amplifier 14 and the current detection signal that is the output of the current detector 15 are subtracted by the subtractor 16, and the current deviation signal that is the output of this subtractor 16 is input to the current control amplifier 17. To be done. The phase controller 18 outputs a gate control pulse based on the current deviation amplification signal output from the current control amplifier 17, changes the output voltage of the antiparallel thyristor power supply 19, and controls the speed of the pinch roll driving electric motor 10.

Further, in FIG. 5 (b) showing the control device of the mandrel 5, 20 is a mandrel driving electric motor, and a speed generator 21 is mechanically coupled to the electric motor 20 and the output of the speed generator 21 is subtracted. Is given to the container 22. On the other hand, the output of the speed reference generator 23 is output via the switch 24 to the subtractor 22.
Is given to the subtracter 22, the deviation of both inputs is obtained, the speed deviation signal is inputted to the speed control amplifier 25, and the output of the speed control amplifier 25 is given to the subtractor 27 via the switch 26. On the other hand, since the output of the current reference generator 28 is given to the subtractor 27 via the switch 29, the speed control amplifier 2 is switched by the switches 26 and 29.
5 or the output of the current reference generator 28 becomes the armature current reference signal of the mandrel drive motor, and this current reference signal and the output of the current detector 30 are the armature current detection signal of the mandrel drive motor. Deviation subtractor 27
The current deviation signal obtained by
Input to 1. The phase controller 32 is a current control amplifier 31.
A gate control pulse is output based on the current deviation amplification signal that is the output of the control signal, and the output voltage of the antiparallel thyristor power supply 33 is changed to control the speed or current of the mandrel drive motor 20. A field winding 34 of the mandrel drive motor 20 is controlled by the field control circuit 35 so that the coil diameter D is proportional to the field flux.

With the above configuration, tension control is performed between the rolling mill 1 or the pinch roll 4 and the mandrel 5. In this case, before the rolled material 2 is wound around the mandrel 5, the mandrel 5 is operated under speed control to set the peripheral speed of the mandrel 5 slightly higher than the rolling speed of the rolled material 2. When the rolled material 2 is wrapped around the mandrel 5, the mandrel 5 is wound at a predetermined timing.
Is switched to current control and shifts to tension control. During the current control, the field control circuit 35 controls the field current so that the coil diameter D of the mandrel 5 and the field flux φ maintain a proportional relationship. Therefore, the winding tension F of the mandrel 5 is proportional to the armature current Ia of the electric motor 20, and the armature current Ia
The tension is controlled by controlling a. That is, the motor torque T has a relationship of T = K ₁ φI _a (1) when K ₁ is a proportional constant, and the relationship between the winding tension F and the motor torque T is as follows. Becomes Therefore, if the field flux φ is controlled so as to maintain a proportional relationship with the coil diameter D, then F = K ₂ I _a (3), and the winding tension F has a comparative relationship with the armature current Ia. it can. However, K ₂ is a proportional constant. The field control circuit 35 receives a signal (not shown) proportional to the coil diameter D being wound by the mandrel 5, and controls the field current so that the field flux φ is proportional to the coil diameter D. .

Next, the switching operation from speed control to current control in the mandrel controller of FIG. 5 (b) will be described.

Before the rolled material 2 is wound around the mandrel 5, the switch 24,
26 is closed and the switch 29 is opened to perform speed control with the output of the speed reference generator 23 as the speed reference. When the rolled material 2 is wrapped around the mandrel 5, the switches 24 and 26 are opened and the switch 29 is closed at a predetermined timing, and the current control is switched to the current control with the output of the current reference generator 28 as the current reference.

However, since the rolling pressure of the rolling mill 1 is high while the rolling material 2 is being rolled by the rolling mill 1, there is no slip between the rolling material 2 and the pinch rolls 4, but the rolling material 2 is rolled. After passing through 1, the winding tension is applied between the pinch roll 4 and the mandrel 5. At this time, since the tension of the mandrel 5 suddenly acts as the tension of the pinch roll 4, the rolled material 2 may slip on the pinch roll 4. Once the slip occurs, the mandrel 5 is accelerated because it is driven by current control, the tension between the pinch roll 4 and the mandrel 5 decreases, and the winding cannot be performed properly. This is a phenomenon that occurs because the dynamic friction coefficient between the pinch roll 4 and the rolled material 2 decreases due to the static coefficient of friction, which may damage the rolled material 2 or deteriorate the winding shape. is there.

Therefore, as a conventional preventive measure, for example, Japanese Patent Laid-Open No. 58-4
As disclosed in Japanese Patent No. 7514, a control device shown in FIGS. 6 (a) and 6 (b) is proposed. Here, FIG. 6 (a) is a control device for the pinch roll 4, and FIG. 6 (b) is a control device for the mandrel 5, and the same elements as those in FIGS. 2 (a) and 2 (b) are the same. The reference numeral is attached.

In FIG. 6 (a), 40 is a current reference generator,
The deviation between the current reference signal of the generator 40 and the output signal of the current detector 16 is obtained by the subtractor 41, and this deviation signal is given to the speed correction amount calculator 42. The output of the speed correction amount calculator 42 is given to the subtractor 44 via the switch 43, and the subtractor 44 subtracts the output of the speed reference generator 12 and the output of the speed correction amount subtractor 42 from each other. Given to 13. Further, in FIG. 6B, 50 is a speed correction rate setting device, and the output of this setting device 50 is given to the integrator 52 via the switch 51. Further, the output of the integrator 52 is given as a correction signal to the output of the speed reference generator 23 via the switch 53 and the subtractor 54. 55 is a current limit value setting device, and the output of this setting device 55 is given to the comparator 56. The comparator 56 compares the outputs of the current limit value setter 55 and the current detector 30 and opens / closes the switch 51 based on the comparison result.

Then, this control device switches the speed control of the pinch roll 4 to current control immediately after the end of rolling, eliminates tension fluctuation at the time when the tail end of the rolled material 2 leaves the rolling mill 1, and thereafter controls the current control of the mandrel 5 at a high speed. This is a control method for switching to control.

That is, tension control during winding is performed as follows. First, until the rolled material 2 is wound around the mandrel 5, the switch 43 shown in FIG. 6 (a) is opened and the pinch roll 4 is operated under speed control. Similarly, the switch 24 of FIG.
26 is closed and switches 29 and 53 are opened to open the mandrel 5.
Also operates with speed control. Simultaneously with the rolling of the rolled material 2 around the mandrel 5, the switches 24 and 26 are opened and the switch 29 is closed at a predetermined timing to switch the mandrel 5 to current control.

In the winding control, so-called tension down control is performed in which the winding tension is lowered before the rolled material 2 leaves the rolling mill 1. Before the tail end of the rolled material 2 leaves the rolling mill 1, the tension down control is started at a predetermined timing to close the switch 43, and the current reference signal of the current reference generator 40, the current detector 16, and the current detection signal. Are compared by the subtractor 41, and the current deviation signal is input to the speed correction amount calculator 42, and added as a speed correction signal to the signal of the speed reference generator 12 via the switch 43 and the subtractor 44. That is, the pinch roll switches from speed control to current control. After that, at the timing when the rolled material 2 leaves the rolling mill 1, the tension down control is terminated, the switches 24 and 26 are closed, and the switch 29
When opened, the mandrel 5 switches from current control to speed control. Note that the rolled material 2 is rolled by the rolling mill 1 from the end of tension down.
In consideration of the case where the mandrel 5 is switched to the speed control during the period until it exits, the current limiting control is performed so that an excessive current does not flow to the drive motor 20 of the mandrel 5.

That is, the current limit signal of the current limit value setting unit 55 and the current detection signal of the current detector 30 are compared by the comparator 56, and when the current detection signal exceeds the current limit signal, the switch 51 is closed to set the speed correction rate. Switch the output of value 50 to switch 51
Input 1 integration to the integrator 52 is started via. Integrator 5
The output of 2 is added as a speed correction signal to the signal of the speed reference generator 23 through the switch 53 and the subtractor 54 to correct the speed reference, thereby preventing an excessive current from flowing through the mandrel 5. After that, when the rolled material 2 leaves the rolling mill 1, the comparator 56 stops the comparison, the switch 51 is opened, and the output of the integrator 52 is held. Until the end of winding, the pinch roll 4 is operated under current control and the mandrel 5 is operated under speed control.

Mandrel 5 immediately before the end of winding when the above control is performed
FIG. 7 shows how the tension of the pinch roll 4 changes.

In FIG. 7, F _MD is the mandrel tension, and F _PR is the pinch roll tension. At time t _{1, the} tension down control is started, and at time t ₂ , the tension is reduced to the set tension down. the tail end of the rolled material 2 to t ₂ is rolling mill 1
It shows a state in which the tension down control is performed so as to pass through.

The solid line of the pinch roll tension F _PR is the tension change when the control device of FIG. 6 is applied, and the constant chain line shows the tension change of the winding control device of FIG.

The tension between the rolling mill 1 and the pinch roll 4 is the sum of F _MD and F _PR . Therefore, when the control device of FIG. 6 is applied, the tension between the rolling mill 1 and the pinch roll 4 becomes almost zero at the end of the tension down control, and the tail end of the rolled material 2 seen in the control device of FIG. It is possible to eliminate a sudden tension fluctuation when passing through the rolling mill 1, and a slip occurs between the pinch roll 4 and the rolled material 2 due to this tension fluctuation, and the rolled material 2 is scratched or wound. Can be prevented from becoming worse.

However, in the control device of FIG. 6, when the rolled material 2 leaves the rolling mill 1 and is wound around the mandrel 5, the tension applied to the rolled material 2 is controlled to the target tension for the following reason. There is a drawback that it is not done.

That is, when the rolled material 2 leaves the rolling mill 1 and is wound around the mandrel 5, the relationship between the forces applied to the rolled material 2 is
The tension applied to the rolled material 2 is F by the torque τ generated by the mandrel 5 and the torque τ _P generated by the pinch roll 4.
_P, and the tension caused by the friction of the pinch roll 4 rolling mill 1-side portion and the hot run table 3 from the rolled material 2 (referred to as back tension) and F _B, is as follows.

= F _P + F _B (4) where D _P is the roll diameter of the pinch roll 4.

As shown in the equation (4), the winding tension F of the mandrel 5 is the sum of the tension F _P and the back tension F _B applied by the pinch roll 4 to the rolled material 2.

By the way, the back tension F _B changes depending on the length of the rolled material 2 on the hot run table 3, but the conventional pinch roll 4 is switched from speed control to current control, and the mandrel 5 is switched from current control to speed control. However, since the change amount of the back tension F _B is not corrected in the current reference for generating the torque τ _P generated by the pinch roll 4, the winding of the mandrel 5 is changed by the fluctuation of the back tension F _B as described above. The take-up tension, that is, the tension F applied to the rolling mill 2 is not controlled to the target tension. This changes the conventional pinch roll 4 from speed control to current control,
In the winding control device that switches the mandrel 5 from the current control to the speed control, the winding tension F of the mandrel 5 is monitored while the pinch roll 4 is current controlled, and the target value of the winding tension F of the mandrel 5 and the actual value are actually measured. Due to the deviation of the winding tension F of the mandrel 5, the current reference of the pinch roll 4 is not corrected.

As described above, in the conventional winding control device that switches the pinch roll 4 from speed control to current control and the mandrel 5 from current control to speed control, the tension applied to the rolled material 2 is not controlled to the target tension, and the winding shape is not controlled. There was a problem that became worse.

[Object of the Invention]

The present invention has been made in order to eliminate the above-mentioned drawbacks of the prior art, and a winder control that can satisfactorily control the speed of the rolled material until the end of winding and also can control the tension applied to the rolled material. The purpose is to provide a device.

[Outline of Invention]

In order to achieve the above object, the present invention uses a winding device driven by an electric motor to drive a rolled material rolled by a rolling device to a predetermined winding tension and a winding speed through a pinch roll driven by the electric motor. In a winding control device for controlling the winding device, a motor for driving the winding device according to a speed reference from after the tail end of the rolled material leaves the rolling mill to the completion of winding by the winding device. While controlling the speed, the tension of the pinch roll driving motor is controlled by the deviation between the current reference for controlling the armature current of the winding device driving motor and the armature current detection signal of the winding device driving motor. It is characterized by doing so.

Example of Invention

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3. In the following drawings, the same elements as those shown in FIGS. 4 to 7 are designated by the same reference numerals.

FIG. 1 is a circuit configuration diagram of the winding control device. This device is different from that of FIGS. 6 (a) and 6 (b) in that the pinch roll control device of FIG. 6 (a) and the mandrel control device of FIG. 6 (b) are surrounded by a chain line. That is, 60 is connected to each other. Here, the circuit 60 includes a subtracter 61 that obtains a deviation value between the output of the current reference generator 28 and the output of the current detector 30, and a speed correction amount calculator 62 that obtains a speed correction amount based on the output of the subtractor 61. A switch 63 for turning on / off the output of the speed correction amount calculator 62, a switch 64 for turning on / off the output of the speed correction amount calculator 42, and a speed correction amount calculator 62 given via the switches 63, 64. ，
Adder 6 for adding both outputs of 42 and giving to switch 43
5 is included.

In the above configuration, tension control during winding is performed as follows. First, until the rolled material 2 is wrapped around the mandrel 5, the switch 43 is opened and the pinch roll 4 is operated under speed control. Similarly, the switches 24 and 26 are closed and the switches 29 and 53 are opened, and the mandrel 5 is also operated by speed control. Simultaneously with the rolling of the rolled material 2 around the mandrel 5, the switches 24 and 26 are opened and the switch 29 is closed at a predetermined timing to switch the mandrel 5 to current control.

In the winding control, so-called tension down control is performed in which the rolling tension is lowered before the rolled material 2 is attached to the rolling mill 1. Before the tail end of the rolled material 2 leaves the rolling mill 1, tension down control is started at a predetermined timing to close the switches 43 and 64, and the current reference signal of the current reference generator 40 and the current of the current detector 16 are output. The detection signal is compared with the subtractor 41 and the current deviation signal is input to the speed correction amount calculator 42, and the speed reference signal 12 is supplied as a speed correction signal via the switch 64, the adder 65, the switch 43 and the subtractor 44.
Add to the signal. That is, the pinch roll 4 switches from speed control to current control. After that, the rolled material 2 is rolled by the rolling mill 1.
The tension down control is terminated at the timing when the mandrel 5 is closed and the switch 29 is opened to switch the mandrel 5 from current control to speed control. Considering the case where the mandrel 5 is switched to speed control during the period from the end of the tension down to the time when the rolled material 2 leaves the rolling mill 1, a current is supplied to the driving motor 20 of the mandrel 5 so that an excessive current does not flow. Limit control is performed.

That is, the current limit signal of the current limit value setting unit 55 and the current detection signal of the current detector 30 are compared by the comparator 56, and when the current detection signal exceeds the current limit signal, the switch 51 is closed to set the speed correction rate. Switch the output of value 50 to switch 51
Is input to the integrator 52 to start integration. Integrator 5
The output of 2 is added to the signal of the speed reference generator 23 as a speed correction signal through the switch 53 and the subtractor 54 to correct the speed reference, thereby preventing an excessive current from flowing through the mandrel 5. After that, when the rolled material 2 leaves the rolling mill 1, the comparator 56 stops the comparison and opens the switch 51 to hold the output of the integrator 52. After a predetermined time from the time when the tail end of the rolled material 2 leaves the rolling mill 1, the switch 64
Is opened and the switch 63 is closed. Then, the current reference signal of the current reference generator 28 and the current detection signal of the current detector 30 are compared by the subtractor 61, and the current deviation signal is input to the speed correction amount calculator 62, and the switch 6 is used as the speed correction signal.
3, the adder 65, the switch 43, and the subtractor 44 to add to the signal of the speed reference generator 12. Thus, the target value of the winding tension by the mandrel 5 and the actual mandrel 5
The current of the pinch roll 4 is controlled according to the deviation from the winding tension.

Next, the back tension F after switching the control device of the pinch roll 4 to current control for controlling the current of the pinch roll 4 based on the current reference of the mandrel 5 and the armature current detection signal of the drive motor 20 of the mandrel 5 is used. The movement of the line speed and the winding tension F of the mandrel 5 with respect to the fluctuation of _B will be described. The current reference value of the current reference generator 28 is a value corresponding to the winding tension F of the mandrel 5, and this value also includes the acceleration / deceleration current flowing due to the acceleration / deceleration of the mandrel 5.
Therefore, in controlling the winder, if the current of the current reference generator 28 flows through the drive motor 20 of the mandrel 5,
The winding tension F of the mandrel 5 becomes the target winding tension regardless of whether the control of the mandrel 5 is speed control or current control. Further, the winding speed of the rolled material 2 can be controlled to the target winding speed via the speed control of the mandrel 5.

As described above, in the present embodiment, the tension and speed applied to the rolled material 2 can be favorably controlled after the rolling is completed and until the winding is completed, whereby the rolled shape and the quality are stable. Can produce wood. Therefore, it is possible to provide a winding control device with improved yield and improved productivity.

FIG. 2 is a circuit configuration diagram of a winding control device showing another embodiment of the present invention. In the embodiment of FIG. 1 described above, the current control of the pinch roll 4 is performed via the speed control system, but in this embodiment, the pinch roll control device and the mandrel control device are connected via the circuit 70 to directly supply the current. By switching to the control system, the same effect as that of the above embodiment is obtained. Here, the circuit 70 includes a switch 71 for turning on / off the output of the speed reference generator 12, a switch 72 for turning on / off the output of the speed control amplifier 14, and a subtracter 73 connected to the output side of the switch 72. , A current reference storage 74 for holding the output of the speed control amplifier 14, and a current reference storage 7
4 output is provided via switch 75
And a difference value between the output of the current reference generator 28 and the output of the current detector 30 and a subtractor 77 for giving the deviation value to the adder 76, and a current reference amount is calculated based on the output of the adder 76. Current reference calculator 78 for giving a calculated value to the subtractor 73
And a switch 7 for turning on and off the output of the current reference calculator 78
9, a current reference limiter 80 connected in parallel to the current reference calculator 78, and a current limit value setter 81 that outputs a current limit value for controlling the current reference controller 80. The current reference limiter 80 is the current reference calculator 78.
Is controlled so as not to exceed the current limit value of the current limit value setter 81 to prevent an excessive current from flowing in the pinch roll drive motor 10.

In the above configuration, the switches 71 and 7 are used during speed control.
2, 75 are closed and the switch 79 is opened, and the speed of the pinch roll 4 is controlled according to the output of the speed reference generator 12. Further, at the time of current control, the switches 71, 72 and 75 are opened and the switch 79 is closed so that the current reference signal of the mandrel current reference generator 28 and the current detection signal of the armature current detector 30 of the mandrel drive motor are set. Subtractor 7
7 and this deviation and the output of the current reference storage 74 storing the current reference which is the output of the speed control amplifier 14 when the switch 75 is opened are added by the adder 76 to obtain the current reference calculator. It is input to 78 and current control is performed according to the output. As a result, the same effect as that of the device shown in FIG. 1 can be obtained.

FIG. 3 is a circuit configuration diagram of a winding control device showing still another embodiment of the present invention. In this device, when the armature current of the mandrel drive motor 20 becomes equal to or higher than the current control value set value, the control of the mandrel 5 is returned from the speed control to the current control again so that an overcurrent does not flow in the mandrel drive motor 20. This is the addition of various functions. That is, in FIG. 3, 90 is a speed limit value setting device, and the output of this speed limit value setting device 90 is given as a correction amount to the output of the speed reference generator 23 via the switch 91 and the adder 54. An adder 93 is connected to the output side of the speed control amplifier 25 via a diode 92.

The output of the current limit value setter 94 is applied to the adder 93 via the switch 95, and the output of the current reference generator 28 is applied to the adder 93. Further, the output of the current reference generator 28 and the output of the current detector 30 are applied to the speed correction amount calculator 42 after the deviation value is calculated by the subtractor 96.

In the above configuration, the current control amplifier 31 uses the function of the diode 92, and the lower current of the output of the speed control amplifier 25 and the addition output of the current reference generator 28 and the current limit value setter 94 by the adder 93. Input criteria.

That is, until the rolled material 2 is wound around the mandrel 5, the switch 24 in FIG. 3 is closed, and the speed deviation signal between the output of the speed reference generator 23 and the output of the speed generator 21 is sent to the speed control amplifier 25. Is entered. At this time, switch 95 is open and the output of current reference generator 28 is compared to the output of speed control amplifier 25 via diode 92.
The output of the speed control amplifier 25 is a current reference value required to rotate the mandrel 5, and is lower than the output of the current reference generator 28. Therefore, the output of the speed control amplifier 25 is given to the current control amplifier 31. Therefore, the mandrel 5
Until the rolled material 2 is wound around the mandrel 5, the speed is set to a predetermined speed set by the speed reference setting device 23.

When the rolled material 2 is wrapped around the mandrel 5, the switch 91 is closed and the output of the speed limit value setting device 90 is the switch 91.
The deviation signal between the speed reference added to the output of the speed reference generator 23 and the output of the speed generator 21 is input to the speed control amplifier 25 via the adder 54. As a result, the speed of the rolled material 2 is determined by the speed control of the rolling mill 1. Therefore, the output of the speed control amplifier 25 is the sum of the output of the speed generator 21 depending on the rolling speed and the speed higher than the rolling speed. It will be higher than the output of the current reference generator 28 so as to eliminate the deviation from the reference. Therefore, the output of the current reference generator 28 is given to the current control amplifier 31, and the mandrel 5 is in current control.

When the rolled material 2 leaves the rolling mill 1, the speed of the rolled material 2 is determined by the speed control of the pinch roll 4. Therefore, as in the above, the mandrel 5 is still under the current control. A predetermined time after the rolled material 2 leaves the rolling mill 1, the switch 4
3, 95 are closed and switch 91 is opened. Switch 91
By opening the, the deviation between the output of the speed reference generator 23 and the output of the speed generator 21 is reduced, and the speed control amplifier 3
The output of 1 is lowered by the sum of the output of the current reference generator 28 and the current limit value setting device 94, and the mandrel 5 is switched to the speed control by the output of the speed control amplifier 25. Further, the pinch roll 4 is switched to the current control for controlling the current of the pinch roll 4 by the current reference of the mandrel 5 and the detection signal of the armature current of the mandrel 5 when the switch 43 is closed. When the output of the speed control amplifier 25 becomes higher than the sum of the output of the current reference generator 28 and the current limit value setting unit 94, the mandrel 5 causes the output of the current reference generator 28 and the current limit value setting unit 94 to operate. Return to current control using the sum of the above as a current reference to prevent the current from flowing excessively.

〔The invention's effect〕

As described above, according to the present invention, between the end of rolling and the completion of winding, the speed of the winding device driving electric motor is controlled, and the current reference for controlling the armature current of the winding device driving electric motor is used. Since the tension of the pinch roll driving motor is controlled by the deviation from the armature current detection signal of the winding device driving motor, the winding tension and winding speed of the rolled material are large from the end of rolling to the completion of winding. Good winding can be performed without fluctuations.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a winding control device showing an embodiment of the present invention,
2 and 3 are configuration diagrams of a winding control device showing another embodiment of the present invention, FIG. 4 is a schematic configuration diagram showing a mechanical arrangement of the winding device, and FIGS. 5 (a) and 5 (b). ) Shows a conventional winding control device, and FIG. 1 (a) is a control circuit diagram of a pinch roll,
FIG. 6B is a control circuit diagram of the mandrel, and FIG.
(B) shows an example of a conventional winding control device that switches the pinch roll speed control to current control at a predetermined timing and switches the mandrel current control to speed control at a predetermined timing. ) Is a pinch roll control circuit diagram,
FIG. 7B is a control circuit diagram of the mandrel, and FIG. 7 is a diagram showing changes in tension during rolling of the rolled material in the apparatus of FIG. 1 ... rolling mill, 2 ... rolled material, 3 ... hot run table, 4
... pinch rolls, 5 ... winding device mandrels, 10 ... pinch roll driving motors 11, 21 ... speed generators, 1
2, 23 ... Speed reference generator, 16, 30 ... Current detector,
18, 32 ... Phase controller, 19, 33 ... Anti-parallel thyristor power supply, 20 ... Winding device driving electric motor, 28, 40 ... Current reference generator, 34 ... Field winding, 35 ... Field control circuit,
42, 62 ... Speed correction amount calculator, 50 ... Speed correction rate setting device, 52 ... Integrator, 55, 81, 94 ... Current limit value setting device, 56 ... Comparator, 74 ... Current reference storage device, 78 ...
Current reference calculator, 80 ... Current reference limiter, 90 ... Speed limit value setting device.

Claims (1)

[Claims] 1. A rolled material rolled by a rolling mill is controlled by a winding device driven by an electric motor via a pinch roll driven by an electric motor so as to be wound at a predetermined winding tension and winding speed. In the winding control device, after the tail end of the rolled material passes through the rolling mill until the winding is completed by the winding device, while controlling the speed of the winding device driving electric motor according to the speed reference, The tension of the pinch roll driving electric motor is controlled by a deviation between a current reference for controlling an armature current of the winding device driving electric motor and an armature current detection signal of the winding device driving electric motor. Take-up control device.