SU908449A1

SU908449A1 - Apparatus for determining relative reduction of strip in rolling stand

Info

Publication number: SU908449A1
Application number: SU802945982A
Authority: SU
Inventors: Владимир Григорьевич Калачев; Владимир Леонтьевич Савченко; Владимир Александрович Пронякин; Василий Васильевич Парфенов; Владимир Федорович Купор; Лидия Андреевна Ландис; Валерий Дмитриевич Демин
Priority date: 1980-06-26
Filing date: 1980-06-26
Publication date: 1982-02-28

Description

1one

Изобретение относитс к прокатному производству и может быть использо-. вано на широкополосных станах гор чей прокатки дл измерени относительного обжати в процессе прокатки .The invention relates to rolling production and can be used. WANO on broadband hot rolling mills for measuring relative reduction during rolling.

Известно устройство измерени относительного обжати , содержащее моталки, измерительные ролики перед . и за станом, импульсный датчик пути до стана, импульсный датчик пути после стана, регистр сдвига, контролирующий прекращение импульсов.от датчика перед станом, схему выделени сигнала неисправности работы устройства , ведущий счетчик, счетчик измёрительнуй , запоминающее устройство и схему управлени . Причем измерительные ролики соединены с импульсными датчиками пути. Импульсный датчик пути перед станом соединен с входами регистров сдвига и ведущим счетчиком, а импульсный датчик пути после стана с другими входами регистров сдвига и с измерительным счетчиком, который включен на вход запоминающего устройства, а регистры сдвига, соединены с выходами схемы выделени сигнала неисправности работы . Схема управлени соединена со всеми упом нутыми блоками,кроме схемы выделени сигнала неисправной работы 1 .A device for measuring relative reduction is known, comprising coilers, measuring rollers before. and behind the mill, a pulse path sensor to the mill, a pulse path sensor after the mill, a shift register that controls the termination of pulses from the sensor in front of the mill, a device malfunction detection signal circuit, a leading counter, a meter counter, a memory device and a control circuit. Moreover, the measuring rollers are connected to a pulse track sensors. A pulse path sensor in front of the mill is connected to the inputs of the shift registers and a master counter, and a pulse path sensor after the mill with other inputs of the shift registers and a measuring counter that is connected to the memory input, and the shift registers are connected to the outputs of the malfunction signal isolation circuit. A control circuit is connected to all of the above blocks, except for the malfunction signal isolation circuit 1.

Недостатком этого устройства вл етс его низка точность, так как измерительньж ролик имеет тепловую деформацию, котора измен ет соотношение между его угловой и линейной скорост ми. Кроме того, измерительный ролик подвержен износу и не исключаетс его проскальзывание по прокатываемой полосе.A disadvantage of this device is its low accuracy, since the measuring roller has a thermal deformation that changes the ratio between its angular and linear velocities. In addition, the measuring roller is subject to wear and does not preclude its slipping over the rolled strip.

Наиболее близким к предлагаемому по технической сущности и достигаемому результату вл етс устройство, которое содержит датчики скорости последней и предпоследней клетей, гас щие сопротивлени , сопротивлениеThe closest to the proposed technical essence and the achieved result is a device that contains the speed sensors of the last and the penultimate stands, damping resistance, resistance

плеча сравнени , начальное сЬпротивление плеча сравнени , сопротивление реохорда потенциометра, сопротивление шунтд реохорда, электронный усилитель, реверсивный двигатель и регистрирующий прибор.Причем датчик скорости измер емой последней клети через гас щие со , противлени подключен к сопротивлению реохорда, параллельно которому включено сопротивление шунта, а датчик скорости предпоследней клети через гас щие coпpotивлeни подключен на сопротивление плеча сравнени напр жени . Начальное сопротивление плеча сравнени включено между сопротивлением реохорда потенциометра и сопротивлением плеча сравнени напр жени , другой конец которого соединен с входом электронного усилител потенциометра. Ползунок реохорда механически св зан с ротором реверсивного двигател , включенного на выход электронного усилител reference arm, initial reference arm resistance, a potentiometer resistance of a relay, resistance of a reichord shunt, an electronic amplifier, a reversing motor and a registering device. Moreover, the speed sensor of the measured last stand through the damping resistors is connected to the resistance of the resistance, parallel to which the resistance of the shunt is turned on, The speed sensor of the penultimate stand is connected to the resistance of the shoulder of the comparison voltage through damping countermeasures. The initial impedance of the reference arm is connected between the resistance of the potentiometer and the impedance of the reference voltage, the other end of which is connected to the input of the electronic potentiometer amplifier. The slider is connected mechanically to the rotor of the reversing motor connected to the output of the electronic amplifier.

Таким образом реализуетс схема моста сравнени , в двух плечах которого включены датчики скорости (тахогенераторы ) последней и предпоследней клетей, а два других плеча собраны на сопротивлени х 2.In this way, a comparison bridge circuit is implemented, in the two arms of which speed sensors (tachogenerators) of the last and penultimate stands are connected, and the other two arms are assembled on resistances 2.

Недостатком устройства вл етс низка точность измерени относительного обжати , вызванна неточностью задани опережений, а также за счет изменени диаметра рабочих валков при прокатке, и ЭДС тахогенераторов , которые не учитываютс устройством.The drawback of the device is the low accuracy of the measurement of the relative reduction caused by the inaccuracy of setting the advances, as well as due to the change in the diameter of the work rolls during rolling, and the emf of the tachogenerators, which are not taken into account by the device.

Цель изобретени - повышение точности определени относительного обжати полосы в прокатной клети.The purpose of the invention is to improve the accuracy of determining the relative reduction of strip in a rolling stand.

Поставленна цель достигаетс тем, что в устройство определени относительного обжати полосы в прокатной клети, содержащее датчики скорости рассматриваемой и предыдущей клетей, регистрирующий прибор , дополнительно введены датчики наличи металла в рассматриваемой, предыдущей и в последующей клет х, генератор импульсов, делитель частоты , четыре сметчика, выходы которых соединены с соответствующими входами четырех регистров, блок управлени , шесть элементов И, три элемента ИЛИ, элемент НЕ, триггер, ,три схемы сравнени кодов, входы которых подекадно соединены с соответствующими выходами счетчиков и регистров, причем вход первого счетчика через первый элемент ИЛИ соединен с выходами двух элементов И, S один вход первого из них соединен с выходом делител .частоты, вход которого подключен к выходу генератора импульсов и первому входу второго элемента И, а другие входы первых двух элементов И соединены с выходом блока управлени , на входы . которого подключены выходы датчиков наличи металла в рассматриваемой и предыдущей клет х, кроме этого, выход датчика наличи металла в рассматриваемой клети соединен со входом записи в первый регистр, а выход датчика наличи металла в последующей клети соединен с одним входом второго элемента ИЛИ и первыми входами третьего и четвертого элементов И, на второй вход третьего элемента И подключен выход датчика скорости рассматриваемой клети, а на второйThe goal is achieved by the fact that the device for determining the relative strip reduction in the rolling stand, containing the sensors of the considered and previous stands, the registering device, additionally introduced sensors of the presence of metal in the considered, previous and subsequent stands, pulse generator, frequency divider, four estimators whose outputs are connected to the corresponding inputs of four registers, control unit, six AND elements, three OR elements, NOT element, trigger,, three codes comparison circuits, inputs to secondly connected to the corresponding outputs of the counters and registers, the input of the first counter through the first element OR connected to the outputs of two elements AND, S one input of the first one connected to the output of the frequency divider, the input of which is connected to the output of the pulse generator and the first input of the second element And, and the other inputs of the first two elements And are connected to the output of the control unit, to the inputs. sensor outputs of the presence of metal in the considered and previous cells are connected, in addition, the output of the sensor of the presence of metal in the considered cage is connected to the input of the record in the first register, and the output of the sensor of the presence of metal in the subsequent cage is connected to one input of the second OR element and the first inputs of the third and the fourth element And, on the second input of the third element And connected the output of the speed sensor of the considered stand, and on the second

5 вход четвертого импульсный датчик скорости предыдущей клети, причем выход третьего элемента И соединен с первым входом третьего элемента ИЛИ, второй вход которого соеди0 иен с выходом первой схемы сравнени кодов, входом установки в О первого счетчика и первым входом триггера, а выход третьего элемента ИЛИ соединен со входом второго5, the fourth pulse input speed sensor of the previous stand, the output of the third element AND is connected to the first input of the third element OR, the second input of which is connected to the output of the first code comparison circuit, the installation input to the first counter and the first input of the trigger, and the output of the third element OR connected to the input of the second

J и третьего счетчиков, кроме этого, выход четвертого элемента И соединен со входом четвертого счетчика, вход установки в О которого соединен с входами установки в ОJ and the third counters, in addition, the output of the fourth element And is connected to the input of the fourth counter, the installation input in O of which is connected to the installation inputs in O

0 второго и третьего счетчиков и с выходом п того элемента И, один вход которого подключен к выходу второй схемы сравнени кодов и к первому входу шестого элемента И,0 of the second and third counters and with the output of the fifth element And, one input of which is connected to the output of the second comparison circuit of codes and to the first input of the sixth element And,

второй вход которого соединен с выходом элемента НЕ, а выход - со вторым входом триггера, выход которого соединен с входом записи в четвертый регистр, а второй входthe second input of which is connected to the output of the element NOT, and the output to the second input of the trigger, the output of which is connected to the input of the record in the fourth register, and the second input

п того элементна И соединен с выходом третьей схемы сравнени кодов, входом элемента НЕ и вторым входом третьего элемента ИЛИ, выход которого соединен с входами записи во второй и четвертый реги.стры, а на вход четвертого регистра подключен регистрирующий прибор. The fifth element is connected to the output of the third code comparison circuit, the input of the element is NOT, and the second input of the third element OR, the output of which is connected to the write inputs to the second and fourth registers, and a recording device is connected to the input of the fourth register.

Claims

The drawing shows a functional diagram of the device for determining the relative reduction of strip in a rolling stand. The device contains a sensor 1 of the presence of the metal of the previous K-1st stand, a sensor 2 of the presence of metal in the considered K-th stand, a sensor 3 of the presence of metal in the subsequent K + 1-OY stand, a pulse sensor k of the speed of the K-th stand, a pulse sensor 5 speeds K-1 of the stand, control block 6, pulse generator 7, frequency divider 8, elements OR 9-12 elements OR, counters 16-18 binary-decimal, registers 19-22, counter 23 reversing, circuits 2 "- 2b comparison of the codes, the elements of And 27 and 28, the element of NOT 29. Triger ger 30, the recording device 31 The device works as follows. In the initial position, the counters and registers are set to the zero state. At the entrance of the gable section of the strip into K-1 stand, according to the signal from the sensor 1, the presence of metal will open the control unit 6; element AND 10, which transmits a pulse from the output of the frequency divider 8 to the input of the first counter 16 through the element OR 13 during the time interval t of the 1-gap interval Lp. where O. - metal speed between K-1-st and K-th cells. The number of pulses recorded in counter 16 is equal to W, t where K is the divisor coefficient of 8; 2 - frequency, pulses at the output of the generator 7. The signal of the sensor 2 for the presence of metal in the K-th stand is used to record the number W) from counter 16 to register 15. At the time the codes in the first counter 16 and first register 19 at the output of circuit 2 are equal, compare There are no codes for the VITS signal, which is fed to the input of counter 16 and sets it to the zero position. After the counter is set to O, it is again filled with pulses with frequency, yyyy, coming through elements 9 and 13, since the control unit will open element I 9. on the signal of sensor 2 of the presence of metal in the K-th stand. When the counter code 16 is compared with the register code 19, the output of circuit 2 comparison codes appear pulses with a frequency, | i, which arrive at the inputs of counters 17 and 23. When the band enters K + 1 st cell, the 17th number recorded in the counter for the time tj in the next interval is In the reversible counter, working to subtract the pulses arriving at its input, the number 1 - W will be written. At the same spacing between the spaces x, the number V / J is proportional to the relative reduction in bandwidth in the Kth stand, which is by the known ratio no where h; V, respectively, the thickness and speed of the strip at the entrance to the K-th stand; accordingly, the thickness and speed of the strip at the exit From the K-th stand. The sensor signal 3 presence of metal in the K + 1-OY stand, arriving at the inputs of the registers 20 and 21 through the element OR, 15. The relative reduction in the register 20 and the ratio of the rolling speeds in two interspaces are recorded. After writing the codes in the registers 20 and 21, the code comparison circuit 25 generates a pulse signal which is fed through the input And 27 to the input of the counters 17 and 18. As the code is the same in the counter 18 and the register 22 and is equal to zero, it is set to O counter 17. After the zero code is established in the counter 17, elements 11 and 12 are turned on by the signal of the sensor 3 of the presence of metal in the K-th stand. The pulses from the output of sensor k will be fed to 7 g inputs of the estimator 17 and 23, and from the output of sensor 5 to the input of counter 18. If the codes in counter 17 and register 21 match, the output signal of the code comparison circuit 25 enters register 22 input through element 28 , at the input of which there is a decisive signal from the output of element 29, and trigger 30. The number recorded in register 22 from counter 18 is equal to where & t -, ieHHO the frequency, and the pulse of momentum from the outputs of the sensors K and K-1 th stands. If the codes in counter 18 and register 22 are equal, the signal of the code comparison circuit records the numbers from counter 23 to register 20, and from counter 17 to register 21. In view of the fact that the numbers in counter 1 / and register 21 become equal, circuit 25 comparing the codes will allow the passage of the signal from the output of the code comparison circuit 26 to the inputs of the counters 23, 17 and 18, and will be set to the zero state. After zeroing the counters 17,18 and 23, the pulses from the speed sensors 4 and 5 will again be fed to the inputs of the counters 17, 18 and 23. However, the counting time will be determined by the number and frequency f., Since the trigger P will not ensure that the register is rewritten 22 because it is in its former state. The trigger 30 is set to the initial state by a signal that comes from the output of the code comparison circuit 2 as it passes through the head of the subsequent interstitial gap. Thus, in the register 20, the number corresponding to the relative compression of the strip in the K-th stand during the cycle by a certain number Wi, is entered. The rewrite operation will continue at the output of the strip. When you run the strip from the K-th stand, control unit 6 resets all counters and registers to O (not shown). The information on the relative reduction of the strip from the output of the register 20 will be removed from the recording device 31. A technical advantage of the invention in relation to the existing ones is to improve the accuracy of determining the relative reduction of strip in the rolling stand, since it takes into account the change in advance metal, the change in diameters of the work rolls with the passage of the head part of the strip. In addition, the use of pulse speed sensors makes it possible to obtain high accuracy (up to 0.1%) of measuring the rotational speed of the work rolls. The instrumental error in determining the relative reduction depends on the frequency of the generator and the speed of the sensors of the presence of metal. With a generator frequency in MHz and a constant time of metal sensors of 5-10 ms, the error does not exceed 0.2-0.5. The use of the device on a continuous broadband mill allows to increase the yield of a metal with the best physicomechanical properties of the metal due to the optimal setting of the rolling stands, and also allows the reduction of the hot rolling mills required by the power parameters of the rolling. Formula of the invention. In order to increase the accuracy of determining the relative reduction, sensors for the presence of a metafl in the considered, previous and subsequent cells, a pulse generator, are added to it, in order to improve the accuracy of determining the relative reduction. frequency divider, four counters, whose outputs are connected to the corresponding inputs of four registers, control unit, six AND elements, three OR elements, NOT element, trigger, three comparison circuits codes, the inputs of which are connected to the corresponding inputs of counters and registers, the input of the first counter through the first element OR is connected to the outputs of two AND elements, one input of the first one is connected to the output frequency dividers, the input of which is connected to the output of the pulse generator and the first input of the second element I and the other inputs of the first two elements I are connected to the output of the control unit, to the inputs of which the outputs of the sensors for the presence of metal in the considered and previous cells are connected, in addition, the output of the sensor the metal in the considered glue is connected to the input of the record in the first register, and the sensor output of the presence of metal in the subsequent cage is connected to one input of the second element OR and the first inputs of the third and fourth elements AND, to the second input of the third element I connected the output of the pulse speed sensor of the considered cage and on the second input of the fourth - a pulse speed sensor of the previous stand, and the output of the third element And is connected to the first input of the third element whose second input is connected to the output of the first circuit codes, the input of the installation in O of the first counter and the first input of the trigger, and the output of the third element OR is connected to the outputs and the third counter, in addition, the input of the fourth element I is connected to the input of the fourth 90 counter, the installation input of which is connected to the inputs of the installation About the second and third counters and with the output of the fifth element I, one input of which is connected to the output of the second code comparison circuit and to the nejj input of the sixth element And, the second input of which is connected to the output of the element NOT, and the output to the second input of the trigger, The output of which is connected to the recording input to the fourth register, and the second input of the fifth element AND is connected to the output of the third code comparison scheme, the input of the element NOT and the second input of the third OR element, the output of which is connected to the recording inputs to the second and fourth registers, and to the input The fourth register is connected to the recording device. Sources of information taken into account in the examination 1. The author's certificate of the USSR N, cl. B 21 B 37/00, 1970.

2.Savransky K.N. et al. Measurement of the relative reduction in the last cages of uninterrupted pre-los mills. Sat Production sheet, issue. 1, M., Metallurgists, 1972, p. 83-86.