SU1243855A1 - Apparatus for automatic control of band tension in cold-rolling mill - Google Patents

Description

The invention relates to the automation of rolling production, in particular to the regulation of strip tension on a continuous cold rolling mill.

The purpose of the invention is to improve the quality of the rolled strips by. increase the autonomy of the tension control band.

The drawing shows a block diagram of the proposed device for automatically adjusting the tension of a strip in a cold rolling mill.

A device for automatically adjusting the tension of a strip in a cold rolling mill contains a meter I for deviating the tension of a strip from a predetermined value, connected through block 2 of a nonlinear filter to inputs of block 3 of module extraction and electronic key 4, the output of which is connected to input of proportional storage block 5, the output of which is connected to the input of the theme 6 of the control of the cage push mechanism. The output of the module 3 allocation module is connected to the input of the comparator 7, the other input of which is connected to the source 8 of the reference voltage,. and the output is with the second input of the electronic key 4, the output of the tachogenerator 9 of the drive motor 10 of the cage pressure mechanism is connected to the input of the integrator 11, the output of which is connected to one of the cyMiviaTOpa 12 inputs, the second input of which is connected to the output of the forcing unit 13, whose input is connected with the output of the proportional storage unit 5. The output of the adder 12 is connected to the input of the system 14 for controlling the speed of the drive motor 15 of the stand rolls,

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The device works as follows.

In the initial state, as long as the output; the total voltage of block 2 of a non-linear Modulo filter does not exceed the voltage taken from the source 8 of the reference voltage, the electronic key is open. If the deviation of the tension of the strip, measured by the meter 1 the deviation of the tension of the strip

5 0 5 0 5

0

five

0

five

FROM the terminated value, in this inter-cell gap modulo the voltage taken from the source 8 of the reference voltage, the comparator 7 (under the action of the signal from the output of unit 3) passes from one stable state to another, electronic the key 4 is closed, and the output nanometer, the same proportion, of the storage unit 5, is set in proportion to the deviation of the strip tension. Under the action of the output signal of the proportional storage unit 5, which enters the input of the control system 6 by the pressure mechanism of the stand, the position of the pressure mechanism of the stand changes, and the deviation of the tension of the bands: s in this i-th spacing interval decreases The (.1 + 1) -th intercellular gap, associated with the movement of the known cage mechanism, is compensated for by the effect on the speed of the rolls of the cage.

To influence the speed control system 14 of the drive motor; -; The 15 rolls of the stand serve: t adder 12, integrator P- and boosting unit 13. The input of integrator 1 is outputted by the output signal of the oscillator 9, which measures the rotational speeds of the drive motor 10 of the pressure mechanism of the stand, and the output signal is proportional to - memory block 5. The action of a forcing node, which is a real differentiating link, is manifested only in a transient mode. The setting of the forcing unit 13 is carried out on the condition of simultaneous change in the position of the pressure mechanism and the speed of the stand rolls. In the steady state, the output signal of the forcing unit 13 is zero, and the regulating effect on the speed of the stand rolls is determined by the value of the output voltage of the integrator 11.

The effectiveness of the proposed device is to improve the quality of support for the specified interstand tensions and to increase the process stability in the cold rolling mill.

Claims (1)

DEVICE FOR AUTOMATIC REGULATION OF STRIP TENSION ON THE COLD ROLLING STATION, containing a measuring instrument for the deviation of the strip tension from the set value, connected through the non-linear filter unit to the inputs of the module selection unit and the electronic key, the output of which is connected to the input of the proportional storage unit, the output of which is connected to the input of the system the stand press mechanism, the output of the module selection unit is connected to the first input of the comparator, the second input of which is connected to the reference voltage source the output, and with another input of the electronic key, characterized in that, in order to improve the quality of the rolled strips by increasing the autonomy of regulating the strip tension, the tachogenerator of the drive motor of the stand press mechanism, an integrator, forcing unit, adder and speed control system are introduced into the device the drive motor of the roll stands, and the output of the tachogenerator of the drive motor of the push mechanism of the stand is connected to the input of the integrator, the output of which is connected to one of the inputs of the adder, the other in the course of which is connected to the output of the boosting unit, the input of which is connected to the output in proportion to the memory blockade, the output of the adder is connected to the input of the speed control system of the drive motor of the stands rolls.