SU1342550A1 - Apparatus for determining time when a slab end leaves the cogging stand deformity site - Google Patents

Abstract

The invention relates to the automatic control of rolling mills, in particular, high-quality rolling mills with closed gauges, and can be used to determine the moment when the end of the roll ends out of the deformation zone of the blooming stand. The purpose of the invention is to improve the quality of control and increase the information content of the device, achieved by taking into account in the rolling process the speed, the amount of deformation and the extrusion of the roll. 2 Il.

Description

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The invention relates to the automatic control of rolling mills, in particular, sectional, with closed calibers and can be used for the moment of the end of the roll out of the deformation zone of the compression stand. The purpose of the invention is to improve the quality of control and increase the information content of the device.

Figure 1 shows the block diagram of the apparatus. roystva; Fig. 2 is a diagram of a rolling technology with an indication of the location of metal presence sensors.

The device for determining the moment of the end of the roll out of the deformation zone of the crimping stand contains the first metal presence sensor 1, connected to the input of the first inverter 2 at the output, the second sensor 3 of metal presence, connected at the output to the input of the second inverter 4, the third sensor 5; the presence of metal connected at the output to the input of the third inverter 6, the fourth sensor 7 of the presence of metal connected at the output to the input of the fourth inverter 8. The direct and inverse outputs of the first discharge of the counter 9 passes, respectively, are connected to the first inputs of the first 10, second And, the third 12 and fourth 13 elements I. The second input of the first element I 10 is connected to the output of the first inverter 2, and the third input to the output of the second sensor 3 of the presence of metal and the second input of the fourth element And 13. The output of the third sensor 5 of the presence of metal Yen with the second inputs of the second 11 and third 12 elements And, the third input of the second element And 11 is connected to the output of the fourth inverter 8, and the third input of the fourth element And 13 - to the output of the third inverter 6, the output of the first 10, second 11 And connected to the inputs of the first element OR 14, and the outputs of the third 12 and fourth 14 elements And with the input of the second element OR 15, the output of which is connected to the S input of the trigger 16, the R input of which is connected to the output of the sixth element And 17, whose inputs connected to the inputs of the first 2, second 4, third 6. and four pty 8 inverters. A single output of the trigger 16 is directly connected to the first input of the sixth element I 18 and through the fifth inverter 19 to the first input of the element AND-NOT 20, the second input of which

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It is connected to the output of the inverter 21, whose input is connected to the output of the first element OR 14 and the first input of the seventh element AND 22. The output of the IS-NOT element 20 is connected to the R-input of the reversing counter 23, the summing and subtracting inputs of which are connected to the corresponding outputs of the sixth 18 and seventh 22 And elements, the second inputs of which are connected to the outputs of the generator 24 pulses, and the third inputs - respectively with N, 7, N To the inputs of the comparator 25, whose N2-input is connected to the discharge outputs of the reversible counter 23, N , -comparator input 25 is connected to the output of the setting device 26, and the N, N output of it through the one-shot 27 is connected to the counting input of the counter 9 passes.

All units and components of the device can be performed both on specialized elements and on standard elements of computer technology.

For example, photoelectric sensors of the type FDSU can be used as sensors for the presence of metals.

The device works as follows.

At the beginning of the rolling cycle, when the first roll passes to the rolls, the rolls rotate in the forward rolling direction. The peal, by the leading edge, successively crosses the zones of action of the sensors 1, 3.5 and 7 of the presence of metal (Fig. 2), is installed in front of and beyond the cage at a certain distance so that the distances between the sensors 1 and 3, 5 and 7 and the distances from sensors 3 and 5 to the end of the deformation zone differ from each other by a constant value il 1, - 1.

When the rear edge of the roll out of the field of the sensor 1 presence of metal at the output of the first inverter. 2 a signal is generated. When the rear edge of the roll out of the zone of the sensor 3 presence of metal at the output of the second inverter 4, a signal is generated. .

In the task of rolling back at the moment when the trailing edge leaves the zone of action of sensors 5 and 7, control signals are generated at the outputs of the third 6 and fourth 8 inverters respectively.

The direction of rolling is determined by the direct and inverse output of the first discharge of the counter 9 passes. If the inverse output of the first discharge of the 9-pass counter has a logic level, rolling goes forward. If the direct output of the first discharge of the 9-pass counter has a logic level, rolling goes backwards.

At the moment when the trailing edge of the first 1 and second 3 metal sensors passes by rolling forward, the signal is generated at the output of the first element And 10, and when the trailing edge of the roll passes, the zones of action of the fourth metal sensor 5 when rolling back at the output of the second element 11 a signal appears.

When the trailing edge of the roll passes the second sensor 3, the presence of metal or the third sensor 5, the presence of metal, depending on the direction of rolling, a signal is generated at the outputs of the third 12 and fourth 13 elements. The interval of the back end of the rollout of the zones of action of the first 1 and second 3 sensors is recorded by the signal at the output of the first element OR 14.

The signals from the outputs of the third 12 and fourth 13 elements of AND come through the second element OR 15. This signal sets the trigger 16 into one state, preparing the device.

The trigger 16 is reset to O by the output signal of the fifth element And 17 when the rollout is withdrawn from the sensor zones 1, 3, 5 and 7. The signal from the single output of the trigger 16 prepares the sixth element And 18 and through the fifth inverter 19 enters the first input of the element AND-NOT 20. The signal from the output of the first element OR 14 through the sixth inverter 21 and the seventh element And 22 prepares a reversible counter 23 to receive pulses from the generator 24 pulses. The receipt of pulses from the generator 24 on. the summing or subtracting input of the reversible counter 23 is determined by the presence of a signal at one of the outputs

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N ,; the comparator 25. If the value of N, given by the setting device 26, is greater than the value counted by the reversing counter, through the sixth

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element I I8 to the summing input of the reversible counter 23 receives pulses from the generator 24 pulses and, conversely, the pulses arrive at the subtracting input of the reversible counter 23 through the seventh element I 22.

When the values of N, and Nj are matched, a signal appears on the N – N output of the comparator, on which the one-shot 27 triggers the counter 9 passes for the next pass.

The unit 26 sets the time value, is equal to the passage of the peal of the difference in distance l1 1, - lo and is refined during adjustment and in operation.

A reversible counter 23 first determines the time it takes for the roll to go from the first sensor 1 to the second sensor 3 when the metal is rolling forward or from the fourth sensor 7 to the third sensor 5 when rolling backwards. The time is determined by the number of t, N / fg pulses. The moment of the exit of the end of the roll from the deformation zone of the stand is determined by subtracting the time set by unit 26 from the counted time t,. The use of this device makes it possible to improve the quality of rolling process control by refining rolling cycles, the reliability and informativeness of the roll out of the stand, and expand the scope for rolling mills of all classes, including reversible.

Claims (1)

Invention Formula A device for determining the moment of the end of the roll out of the deformation center of the crimping stand, containing the first metal presence sensor, the output of which is connected to the input of the first inverter a, the second metal presence sensor, the output of which is connected to the input of the second inverter, the third metal presence sensor, whose output is connected to the input of the third inverter, the fourth sensor of the presence of metal, the output of which is connected to the input of the fourth inverter, the first, second, third and fourth elements of AND, the first and second elements of OR, a trigger that distinguishes so that, in order to improve the quality of control and increase the informativeness of the device, it is equipped with a pass counter, the fifth element AND, the sixth an AND element, an fifth inverter, an NAND element, a sixth inverter, a seventh AND element, a reversible counter, a pulse generator, a comparator, a setpoint generator, a single vibrator, the first and the inverse outputs of the first discharge of the counter of passes, respectively, are connected to the first the inputs of the first, second, third, and fourth elements are And, the second input of the first element And is connected to the output of the first inverter, and the third input to the output of the second sensor of the presence of metal and the second input of the fourth element And, the output of the third sensor the metal is connected to the second inputs of the second element I and the third element I, the third input of which is connected to the output of the second inverter, the third input of the second element I connected to the output of the fourth inverter, and the third input of the fourth element I to the output of the third inverter, outputs the first and second elements AND are connected to the inputs of the first element OR, and the outputs of the third and fourth elements AND to the input of the second element OR, the output of which is connected to the S input of the trigger, the R input of which is connected to the output of the sixth element AND, the cat inputs respectively, are connected to the inputs of the first, second, third, and fourth inverters, and the single output of the trigger is directly connected to the first input of the sixth And element and through the fifth inverter to the first input of the NAND element, the second input of which is connected to the output of the sixth inverter, whose input connected to the output of the first element OR and the first input of the seventh element AND, the output of the element AND-NOT connected to the R-BXO- house. a reversible counter, the summing and subtracting inputs of which are connected respectively to the outputs of the sixth and seventh elements And, the second inputs of which are connected to the output of the pulse generator, and the third inputs - respectively to N, N, the outputs of the comparator, are connected to the discharge outputs of the N reversible counter; The N-input of the comparator is connected to the output of the sensor, and the NN-output of the comparator is connected via a one-shot with the counting input of the pass counter. . 2, V M2-v.khodko Editor N.Nogulich Compiled by Y. Rybyev Tekhred L. Serdyukova 4545/6 Circulation 480Subscribe VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk iab., d. 4/5 Production and printing company, Uzhgorod, st. Project, 4 Pa9.2 Proofreader M.Maksimishinets