SU1101310A2 - Device for measuring interstand tensions of rolled stock - Google Patents

Description

The invention relates to monitoring and regulating devices of rolling mills responsive to changes in rolling tension.

According to the main auth. No. 1039600, a device for measuring interstand tensions of rolled products without looping supports is known, comprising a current motor core current sensor, a shaft movement speed sensor, an EMF sensor of the same electric motor, a metal presence sensor in the previous stand, a metal pressure sensor on the rolls of the same stand, six totalizers , four gain blocks, four multiplication blocks, four blocks of integration, three keys, the element NOT, the sensor of the presence of metal and the subsequent stand fl.

In this device, the leverage of the resultant force is assumed to be constant during the rolling process.

However, as some of the rolling parameters change, the strip temperature, the interstage gap, and others. The lever arm also changes. Due to the fact that the change in the lever arm is not taken into account, the accuracy of measuring the interstand tensions of rolled products is reduced (to 5-10%).

The aim of the invention is as follows. Forming rolled stock by increasing the accuracy of measuring the interstand tensions of rolled metal.

The goal is achieved by adding a constant setting device to the device for measuring interstand rolling tensions., Five reinforcement blocks, seven adders, two integration blocks, three keys, a divider block and a D1} K position of the pressure screws, and the input of the fifth amplifier connected to the first output of the fourth integration block, and the output of the fifth amplifier to the first input of the seventh adder, the second input of which is connected to the output of the constant setting device, and the output of the seventh adder is connected to the first input of the de The output of the latter is connected to the first input of the fourth key, the second input of which is connected to the second output of the metal presence sensor in the next stand, the output of the fourth key is connected to the first input of the eighth adder, the second input of which is connected to the second output of the fourth integration block, and the output the eighth adder - with the second input of the third multiplication unit, the third output of the pressure sensor is connected to the first input of the ninth adder, the output of which is connected to the input of the sixth gain block, the output of the last is connected the first input of the fifth switch, the second input

which is connected to the third output of the first sensor of the presence of metal

in the previous stand, and the output - to the input of the fifth integration unit, the first output of which is connected to the first

The fifth input of the tenth adder, and the second output of the fifth integration block is connected to the second input of the ninth adder, the second input of the tenth adder is connected to the fourth

0 by the output of a metal pressure sensor to the rolls, the output of the tenth adder is connected to the input of the seventh reinforcement unit, the output of which is connected to the first view of the eleventh adder,

5 and the output of the latter with the second input of the dividing unit; the first output of the sensor of the position of the pressure screws is connected to the first input of the twelfth sum / iaTopa, the output of which is connected

0 with the input of the eighth gain block,

and the output of the last - with the first entrance

of the sixth key, the second input of which is connected to the fourth output of the first metal presence sensor in the previous 5 EACH cage, the output of the sixth key is connected to the input of the sixth integration unit, the first output of which is connected to the first input of the thirteenth adder, and the second output is from

the second input of the twelfth adder,

the second input of the thirteenth adder is connected to the second output of the pressure screw position sensor, and the output of this adder is connected to the input of the ninth gain block, the output of which is connected to the second input of the eleventh adder.

The drawing shows a block diagram of the proposed device.

The device contains a sensor 1 current of the electric motor of the previous stand, sensor 2 of the rotation speed of the roll, sensor 3 of the electromotive force of the same electric motor, sensor 4. metal level in the previous stand, sensor

5 5 metal pressure on rolls of the same stand, thirteen adders 6-18, nine amplification blocks 19-27, four multiplication blocks 28-31, six integration blocks 32-37, revenge of keys

0 38-43, element 44, the sensor 45 for the presence of metal in the subsequent stand, unit 46, constants, block 47 and the sensor 48, the position of the pressure screws.

g The device works in the following way.

Prior to entering the strip into the next cell, the value is calculated

; Aj, 2ao4K, "k2o.

0 The device calculates the correction signals that are output to the main device through the eighth adder 13 after the metal enters the next cage and the signal arrives at the fourth key 41 from the metal presence sensor 45 in the next cage. Correction introduces with when calculating the lever arm Od and its dependent coefficient KJQ. After the entrance of the strip into the controlled rolling stand from the third output of the pressure sensor 5, a signal proportional to pressure P arrives at the first input of the ninth adder 1, the signal from the output of the adder 14 arrives at the input of the sixth amplification unit 24 and from the output of the last the input of the fifth key 42, which by a signal from the third turn of the sensor 4 of the presence of metal in the controlled stand, opens and remains open for a specified time interval t sufficient to store the initial pressure P of the metal on the stand. From the output of the fifth key 42, the signal arrives at the input of the fifth integration block 36 and is integrated until the signal at the output of this block reaches the value received at the first input of the ninth adder 14 of the signal from the pressure sensor 5. At the output of the ninth adder, the signal is set to zero and, therefore, will be equal to zero and on you during step n of the integration block 36. At a predetermined interval t, the fifth key 42 is closed, and in the fifth integration block 36, a signal value is stored that is proportional to the initial pressure P of the metal on the rolls of the rolling stand. The initial value of the signal So of the pressure screws coming from the first output of the sensor 48 to the first input of the twelfth adder 17, from which the signal nocTynk em to the input of the eighth gain block 26 is memorized in the same way, is also amplified from the output of the gain block 26 through the sixth key 43 is fed to the input of the sixth integration block 37. The integration is carried out until the signal from the output of the sixth integrating block 37, which arrives at the second input of the twelfth accumulator 17, is not comparable with the output signal from the position sensor 48, which arrives at the first input of the twelfth adder 17, In this case, the signals at the output of the adder 17, the gain unit 26 and the input of the integrator 37 will be zero. In the integration block 37, the signal 5 is remembered, proportional to the initial position of the pressure screws. The sixth key 43, similar to the second key 42, is opened by a signal from the sensor 4 of the presence of metal in the cage and is closed at a set interval t, sufficient for fixing a signal proportional to the initial position of the pressure screws. From the first output of the fifth integration block Jb, a signal proportional to the initial pressure PO of the metal to the rolls is fed to the first input of the tenth adder 15, to the second input of which a signal proportional to the current value of pressure P arrives at the fourth input of the fourth output of the pressure sensor 5. that adder 15, an algebraic sum is formed, which is fed to the input of the seventh amplifier 25 with a gain factor KK P / I; . From the last output, the signal equal to It is fed to the first input of the eleventh adder 16. From the first output of the sixth integration block 37, a signal proportional to the initial position 5 o of the pressure screws goes to the first input of the thirteenth adder 18, to the second input of which from the second output of the 48 position sensor A signal is received that is proportional to the current value of the position of the 5 push screws. At the output of the thirteenth adder 18, an algebraic sum of signals u5 5-SQ is formed, which is fed to the input of the ninth amplification unit 27 with a gain factor. From the output of the last signal equal to (, L5) is fed to the second input of the eleventh adder 16, at the output of which the sum of 2Kr signals is formed QKs r-uP -; r-uS. From the entrance of the metal to the next cage at the input of the eighth adder 13 there is only a signal from the output of the fourth integration unit 35 (since the fourth key 41 is closed) and to the second input of the third: multiplication unit 30 through the eighth su the mater 13 receives the signal Ao 2ao + K, 4-Cro as in the known device; From the second output of the fourth integration block 35, the signal is fed to the input of the fifth block 23. amplification with the gain factor K h, the output of the signal proportional to the value of A g enters the first input of the seventh adder 12, the second input of which receives the signal K, from the output of the constant setting device 46. At the output of the seventh adder 12, a signal 2a is generated, Aog-k ;, which is fed to the first input of the division unit 47, to the second input of which signal from one-eleven th adder 16 in dividing block 47 the output signal of eleventh adder 16 sums proportsiongshny 2ke divided by the signal from the output of the seventh adder 12 that is proportional to the value of 20. At the output of dividing unit 47, a signal is formed, which is proportional to the value that through the fourth key 41, opened by the signal with the sensor 45 of the presence of metal in the cage, after the metal enters this (subsequent) cage enters the first input of the eighth adder 13, in which the signal is summed with signal LM, proportional to A {, arriving at the second input of the eighth sweeper 13 from the second output of the fourth integration block 35 and from the output of the eighth adder 13, a signal is proportional to the value .s). Thus, the adjusted value Ac is obtained, taking into account the change in the lever arm GO from the above rolling parameters: The output signal of the sixth adder 11, proportional to the tension of the Mz strip, goes to the third amplification unit 21 and through the third key 40 to the tension control system lanes, i.e. correction value does not change further the path of the known device. The technological advantage of the invention is to improve the quality of the rolled metal by increasing the accuracy of measurement (and adjustment) of the tension of the strip by 5-7%.

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Claims (1)

DEVICE FOR MEASURING INTER-CELEBRAL TENSION OF RENT »1039600, the reason is that, in order to improve the quality of rolled products by increasing the accuracy of measuring the inter-stand tension of rolled products, a constant adjuster, five amplification units, seven adders, two integration units, three are additionally introduced into it the key, the division unit and the position sensor of the pressure screws, and the input of the fifth amplifier is connected to the first output of the fourth integration unit, and the output of the fifth amplifier is connected to the first input of the seventh adder, the second input of which is connected to the output of the constant adjuster, the output of the seventh sum torus connected to. the first input of the division unit, the output of the latter is connected to the first input of the fourth key, the second input of which is connected to the second output of the metal presence sensor in the subsequent stand, the output of the fourth key is connected to the first input of the eighth adder, the second input of which is connected to the second output of the fourth integration unit, and the output of the eighth adder τ with the second input of the third multiplication unit, the third output of the pressure sensor is connected to the first input of the ninth adder, the output of which is connected to the input of the sixth amplification unit, output the latter is connected to the first input of the fifth key, the second input of which is connected to the third output of the metal presence sensor in the previous stand, and the output to the input of the fifth integration unit, the first output of which is connected to the first input of the tenth adder, and the second output of the fifth integration unit is connected to the second the input of the ninth adder, the second input of the tenth adder is connected to the fourth output, the metal pressure sensor on the rolls / output of the tenth adder is connected to the input of the seventh gain unit, the output of which is connected to the first the input of the eleventh adder, the output of the last one with the second input of the division unit, the first output of the pressure screw position sensor is connected to the first input of the twelfth adder, the output of which is connected to the input of the eight-. | Many amplification unit, and the output of the latter with the first input of the sixth key, the second input of which is connected to the fourth output of the metal presence sensor in the previous stand, the output of the sixth key is connected to the input of the sixth integration unit, the first output of which is connected to the first input of the thirteenth adder, and the second output is with the second input of the twelfth adder, the second input of the thirteenth adder is connected to the second output of the pressure screw position sensor, and the output of this: the first adder is connected to the input of the ninth gain unit, the output of which is connected with the second input of the eleventh adder. σττπΓΠ'ΤΊδ