JP3586521B2 - Pinch roll control device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rolling processing line in which a pinch roll facility is installed on an upstream side and a roll roll facility on a downstream side with respect to a traveling direction of a material to be rolled, and in particular, a pinch is performed without using a load relay included in the roll roll facility. The present invention relates to a pinch roll control device that adjusts roll opening and closing.
[0002]
[Prior art]
In the rolling line, the bite of the material to be rolled into the rolling mill is detected by operating a load relay provided in the rolling equipment, and a pinch roll (hereinafter referred to as PR) is taken into consideration in consideration of the detection and a predetermined time lapse. Opening / closing).
[0003]
[Problems to be solved by the invention]
However, when the rolling load of the rolling roll equipment is light, when the load relay of the rolling roll is not turned on and the PR is not released for a long time, and when the rolling roll speed is faster than the PR speed, the electric motor drive device reaches the regeneration side current limit. In some cases, the protection of the driving device was activated after the timer, and the driving was stopped in some cases. Similarly, when the rolling roll speed is lower than the PR speed, the PR power running side current limit is reached and stopped after the timer, so that a very serious situation of stopping the line may be caused.
An object of the present invention is to provide a pinch roll control device that performs PR opening and closing adjustment without using a load relay device of a rolling roll facility.
[0004]
[Means for Solving the Problems]
According to the present invention, in order to achieve the above object, a pinch roll control device is configured by the following means.
An invention corresponding to claim 1 includes a pinch roll for pinching a material to be rolled and sending it to a rolling mill, an electric motor for driving the pinch roll, a drive control unit for controlling the electric motor, and opening or closing the pinch roll. In the pinch roll control device having an opening / closing device for opening or holding the material to be rolled, a speed control for calculating a pinch roll torque reference Tref based on a speed reference Vref from a man-machine controller that supplies information on the material to be rolled. Means for calculating a pinch roll acceleration / deceleration torque Tacc based on the pinch roll feedback speed Vfb; and a differential torque Tld between the pinch roll torque reference Tref and the pinch roll acceleration / deceleration torque Tacc and a speed reference If Tref is greater than the pinch roll return speed Vfb, or When Tld is negative and the speed reference Vref is smaller than the pinch roll return speed Vfb, the switching device is provided with opening / closing adjustment calculating means for sending a pinch roll opening command to prevent the pinch roll driving equipment from being overloaded. .
[0005]
The invention corresponding to claim 2 includes a rolling mill for rolling a material to be rolled, a first electric motor for driving the rolling mill, a first drive control unit for controlling the first electric motor, and a rolling mill. A pinch roll for feeding the material to be rolled, a second motor for driving the pinch roll, a second drive control unit for controlling the second motor, and a material to be rolled by opening or closing the pinch roll In a pinch roll control device having an opening / closing device for opening or holding the
Speed control means for calculating a pinch roll torque reference Tref based on a pinch roll speed reference Vref from a man-machine controller for supplying information on a material to be rolled, and a pinch roll acceleration / deceleration torque Tacc based on a pinch roll return speed Vfb. The acceleration / deceleration torque calculating means for calculating the difference between the pinch roll torque reference Tref and the pinch roll acceleration / deceleration torque Tacc, if the difference torque Tld is positive and the pinch roll speed reference Tref is greater than the speed reference Vref ′ of the rolling mill, or When the torque Tld is negative and the pinch roll speed reference Vref is smaller than the speed reference Vref 'of the rolling mill, an opening / closing adjustment operation means for sending a pinch roll opening / closing command to the opening / closing device is provided. Pinch roll drive equipment without using Can so as not to load.
[0006]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic block diagram of a first pinch roll control device. The material to be rolled 1 is sent out from the left to the right with respect to the paper surface as indicated by the arrow, and is rolled by rolling rolls 2. The pinch roll 3 feeds and rolls the material 1 to be rolled into the rolling roll 2. This pinch roll 3 is driven by an electric motor 4. The electric motor 4 is supplied with power by a drive control unit 5. The drive controller 5 is supplied with a speed reference Vref for defining the peripheral speed of the pinch roll 3 from the man-machine controller 6. The motor 4 is provided with a speed sensor 7 for detecting an actual rotation speed of the motor 4. The detected speed is fed back to the motor control unit 5 as the feedback speed Vfb, and is also sent to the acceleration / deceleration removal torque calculation means 8 and the opening / closing adjustment calculation means 9. The drive control unit 5 calculates a torque reference Vref of the electric motor 4 based on the speed reference Vref and the feedback speed Vfb. The torque reference Vref is input to the acceleration / deceleration removal torque calculation means 8, where a difference torque Tld described later is calculated. On the basis of the difference torque Tld and the speed reference Vref from the man-machine controller 6, the opening / closing adjustment calculating means 9 calculates whether to open or pinch the pinch roll, and sends a command to the switching device 10. When the command is an opening command, the opening and closing device 10 opens the pinch roll 3 to release the material 1 to be rolled.
[0007]
FIG. 2 is a detailed block diagram showing the relationship between the drive control unit 5 and the acceleration / deceleration removal torque calculation means 8 in FIG.
The drive control unit 5 includes a speed control unit ASR (PI control) 51 and a current control unit ACR52. The torque reference Tref of the electric motor 4 is calculated by the speed control means 51 which receives the speed reference Vref from the man-machine controller 6 and the feedback speed Vfb. The current is supplied to the torque reference Tref current control means 52, and the current control means 52 calculates the current value of the motor. The torque reference Tref is compared with the output of the acceleration / deceleration torque calculating means 81 in the acceleration / deceleration removal torque calculation means 8, ie, the acceleration / deceleration torque Tacc, by the subtraction means 82 to obtain the difference torque, ie, the acceleration / deceleration removal torque Tld. The acceleration / deceleration removal torque Tld is sent to the opening / closing adjustment calculating means 9.
[0008]
Tref-Tacc = Tld (1)
Tld> K (2)
Tld <K (3)
However, K: constant is output as an acceleration / deceleration removal torque regeneration side signal when the above equation (2) is satisfied, and as an acceleration / deceleration removal torque powering side signal when the above equation (3) is satisfied.
[0009]
The speed reference value Vref and the actual speed value Vfb are input from the drive control device 5 of FIG. 1, and the above signals are also input. An AND signal of the resulting signal and the acceleration / deceleration removal torque regeneration side or powering side signal is created.
[0010]
Speed reference value> Actual speed value and acceleration / deceleration removal torque regeneration side signal (4)
Speed reference value <Actual speed value and acceleration / deceleration removal torque power running side signal (5)
The pinch roll 3 is opened by supplying an opening command to the opening and closing device 10 when one of the signal obtained by the expression (4) and the signal generated by the expression (5) is established. Thus, the pinch roll drive motor 4 can be controlled to open and close without overloading the pinch roll drive motor 4 without using the load relay device, and it is possible to prevent the rolling line from being stopped due to the trip of the pinch roll drive motor 4. it can.
[0011]
FIG. 3 is a schematic block diagram in the case where the speed reference Vref ′ given to the electric motor 11 for driving the rolling roll 2 is also input to the opening / closing adjustment calculating means 9. 1 are denoted by the same reference numerals, and description thereof will be omitted.
[0012]
In this case, first, the acceleration / deceleration removal torque calculation means 8 outputs a signal that determines whether the acceleration / deceleration removal torque Tld is acting on the regeneration side or the power running side.
Next, the speed reference Vref and the rolling roll speed reference value Vref 'are input, and the opening / closing adjustment calculating means 9 compares and determines the speed reference value Vref> rolling roll speed reference value Vref' and the acceleration / deceleration removal torque Tld to which the above signal is input. Is the logical product of the regenerative side signal, or the logical product of the speed reference value Vref <the comparison judgment signal of the rolling roll speed reference value Vref ′ and the load torque powering side signal to which the above signal is input is satisfied. If one of them is established, the opening / closing adjustment calculating means 9 outputs an opening command to the opening / closing device 10.
As a result, the pinch roll 3 can be released before the current limit on the regenerative side and the power running side is reached.
[0013]
【The invention's effect】
As described above, according to the present invention, PR opening / closing control can be performed so that the PR driving device is not overloaded without using the load relay device of the rolling roll equipment in the rolling processing line, and the PR driving device is tripped. Stopping of the rolling line can be prevented beforehand.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a first embodiment of the present invention.
FIG. 2 is a block diagram showing a relationship between a drive control unit 5 and acceleration / deceleration removal torque calculation means 8;
FIG. 3 is a block diagram showing a configuration of a second embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 3 ... Pinch roll 4 ... Electric motor 5 ... Drive control part 6 ... Man-machine controller 7 ... Speed sensor 8 ... Acceleration / deceleration removal torque calculating means 9 ... Opening / closing adjustment calculating means 10 ... Opening / closing device

Claims (2)

A pinch roll for pinching the material to be rolled and sending it out to the rolling mill, a motor for driving the pinch roll, a drive control unit for controlling the motor, and opening or closing the pinch roll to form the material to be rolled. A pinch roll control device having an opening / closing device for opening or pinching; a speed control means for calculating a pinch roll torque reference Tref based on a speed reference Vref from a man-machine controller for supplying information on the material to be rolled; Acceleration / deceleration torque calculating means for calculating the pinch roll acceleration / deceleration torque Tacc based on the feedback speed Vfb, the difference torque Tld between the pinch roll torque reference Tref and the pinch roll acceleration / deceleration torque Tacc is positive, and the speed reference Vref is pinch If the roll return speed is higher than Vfb or Pinch roll control apparatus characterized by click Tld to and a closing adjustment calculating means negative and the speed reference Vref is delivering opening command pinch rolls to the switchgear when the pinch rolls feedback speed Vfb is less than. A rolling mill for rolling the material to be rolled, a first electric motor for driving the rolling mill, a first drive control unit for controlling the first electric motor, and a pinch for sending the material to be rolled to the rolling mill A roll, a second electric motor for driving the pinch roll, a second drive control unit for controlling the second electric motor, and opening or closing the pinch roll to open or pinch the material to be rolled. In a pinch roll control device having an opening and closing device,
Speed control means for calculating a pinch roll torque reference Tref based on a pinch roll speed reference Vref from a man-machine controller for supplying information on the material to be rolled; and a pinch roll acceleration / deceleration torque based on the pinch roll return speed Vfb. Acceleration / deceleration torque calculating means for calculating Tacc, wherein the difference torque Tld between the pinch roll torque reference Tref and the pinch roll acceleration / deceleration torque Tacc is positive and the pinch roll speed reference Vref is larger than the rolling mill speed reference Vref '. In the case where the differential torque Tld is negative and the pinch roll speed reference Vref is smaller than the speed reference Vref ′ of the rolling mill, an opening / closing adjustment calculating unit that sends a pinch roll opening / closing command to the opening / closing device is provided. Pinch roll control device.

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