SU1371729A1 - Arrangement for automatic braking of rolled stock down to the given speed - Google Patents

Abstract

The invention relates to the field of rolling stock automation and can be used in the control system of the main drive of a reversing Rolling Mill to ensure the release of rolled metal at the optimum speed. The purpose of the invention is to increase the productivity of the mill. The goal is achieved by introducing a second memory unit to store the sign of the brake start correction (HT) sign on the actual outlier. In the NT correction block, according to the actual outlier, the measured NT correction value is processed according to the actual outburst, depending on whether the sign of the current correction coincides with the correction sign of the same pass of the previous rolling cycle or the correction value of the same pass of the previous rolling cycle was zero. Then, in the NT moment determination unit, the value of the rolled length of the ingot stored in the first memory block is corrected to the moment of the NT in the same skip of the previous rolling cycle, and when comparing this value with the value of the current rolled length of the ingot, the drive NT command is issued. 3 ep (1g-ly, 4 cf. s (L oe yu; o

Description

113

The invention relates to the automation of rolling production and can be used in the control system of the main drive of a reversing rolling mill to ensure the release of rolled products at the optimum speed.

The aim of the invention is to increase the productivity of the mill.

Fig. 1 is a block diagram of an automatic braking device for rolled products to a given speed; Fig. 2 shows a unit for measuring the rolled length of an ingot until the start of braking; in (1ig. 3 is a block for determining the start of braking; in Fig. 4, a block for correcting the start of braking based on the actual ejection.

The block diagram of the automatic braking of rolled products to a given speed (Fig. 1) contains a sensor 1 rolled edge, a sensor 2 having rolled products in rolls, a roll angle sensor 3, a sensor A speed, a unit 5 measuring rolled laminate length until the start of braking, a block 6 Memory, block 7 for determining the start of braking, block 8 for correcting the start of deceleration based on actual ejection, memory block 9, the first input of block 5 for measuring the rolled ingot length until the start of braking is connected to the inverse output of the sensor 1 the second input is connected to the direct output of the sensor 2 for rolling in rolls, the fourth input of the block 7 for determining the start of braking and the first input of the block 8 for correcting the start of deceleration by actual ejection, the third input is connected to the output of the sensor for the angle of rotation of the rolls and the second input of the block 8 of the start of braking on the basis of the actual emission, the fourth input is connected to the first output of the block 7 for determining the start of braking, the fifth input is connected to the inverse output of the sensor 2 for rolling in rolls and the fourth input b the start of braking start correction 8 according to the actual surge, the first turn is connected to the information input of the memory block b and the first input of the block 7 for determining the start of braking, and the second output is connected to the input of memory 6, the fifth input of the brake start correction 8 by actual release

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connected to the output of the speed sensor 4 and the third input of the block 7 for determining the start of braking, the third input is connected to the second output of the block 7 for determining the moment of the beginning of braking and the output terminal Start of braking of the device, the sixth input is connected to the input terminals

0 device release rate, the seventh input is connected to the first information output of memory block 9 and the sixth input of block 7 for determining the start of braking, the first, second and third outputs are connected respectively to the first and second information inputs and input Record of memory block 9, the second information output of which is connected to the seventh input of block 7 for determining the start of deceleration, and the address input is connected to the address input of memory block 6 and input terminals Number of device skip, the second input of block 7 determines the Chal braking torque is coupled to the input terminal Manual braking device ty n input connected to the data output unit 6 memory.

0 Block 5 measuring the rolled length of the ingot until the start of deceleration (Fig. 2) contains the circuit AND 10 sum counter 11 and driver

12 impulses, with the first input of the AND circuit 10 connected to the first input

block, the second input is connected to the second input of the block, the third input is connected to the third input of the block, the fourth input is connected to the fourth input of the block and the input of the pulse former 12, and the output is connected to the counting input of the summing counter I1, the Reset input is connected to the fifth the input of the block, and the output is connected to the

5 output of the block, the output of the pulse driver 12 is connected to the second output of the block.

The unit 7 for determining the start of braking (FIG. 3) contains a circuit

13 comparison, adder-subtractor 14, S1NI circuit 15, comparison circuit 16, trigger 17, the first information input of comparison circuit 13 is connected to the first input of the block, the second information input is connected to the output of adder-subtractor 14, the control input is connected to the fourth input of the block , and the output is connected to the first input of the circuit OR 15, the second input is ko0

five

the second is connected to the second input of the block and the output is connected to the input of Setup 1 of the trigger 17, the first information input of the adder-subtractor 14 is connected to the seventh input of the block, the second information input is connected to the fifth input of the block, and the control input is connected to the sixth input of the block, the input Comparison circuits 16 are connected to the third input of the unit, and the output is connected to the installation input. About trigger 17, the direct output of which is connected to the second output of the unit, and the inverse output is connected to the first output of the unit.

The block 8 for correcting the start of deceleration according to the actual surge (Fig. 4) contains a comparison circuit 18, AND 19 and 20 diagrams, a pulse former 21, an OR circuit 22, a register 23, an AND 24 circuit, a comparison circuit 25, a ШШ 26 circuit, a frequency divider 27, a switch 28, a pulse shaper 2U and a summing counter 30, the first input of the comparison circuit 18 is connected to the fifth input of the unit, the second input is connected to the sixth input of the block, the direct output is connected to the first input of the AND circuit 19, the inverse output is connected to the second input of the AND circuit 20, the second input And 19 is connected to the first input of the circuit And 20, the input pulse generator 21 and the third input of the block, the third input is connected to the first input of the block, and the output is connected to the first input of the OR circuit 22 and the second input of the register 23, the third input of the AND 2Q circuit is connected to the fourth input of the block, and the output is connected to the second input the OR circuit 22 and the input of the first register bit 23, the output of the pulse generator 21 is connected to the input of the pulse generator 29 and the third output of the block, the output of the OR circuit 22 is connected to the second input of the AND 24 circuit, the first input of which is connected to the second input of the block, and the output is connected to the input of the cases frequency bodies 27 and the first information input of the switch 28, the input Setting O register 23 is connected to the input Setting O of the summing counter 30 and the output of the pulse former 29, and the output is connected to the first output of the block and the first input of the comparison circuit 25, the second input of which is connected to the seventh input of the unit, and the first and second outputs are connected respectively to the first and second

the inputs of the OR circuit 26, the output of which is connected to the control input of the controller 28, the second information input of which is connected to the output of the frequency divider 27, and the output connected to the counting input of the summing counter 30, the output of which is CL-one with the second output of the block.

The output of the automatic braking device for rolling up to a given speed is the first output of the unit 7 for determining the moment of the start of braking,

The device works as follows.

After rolling the rollers, the sensor 2 of rolling in the fleece is triggered, and from the moment the back end of the ingot leaves the field of view of sensor 1 of the rolled edge, pulses from the sensor 3 angle of rotation of the rolls through the open circuit 10 (FIG. 2) start to arrive at the counter 11, forming code of the current rolled length of the ingot (Lp). This code goes to the first input of cf Nfci 13 comparison (FIG. 3), the second input of which receives the code of the rolled length of the ingot until the start of braking (LJ, 4 before) formed in the same skip of the previous one

rolling cycle. Code b „

PfA formation

at the output of adder-subtractor 14 as the algebraic sum of the uncorrected code L s.ppx and the correction code of the start of braking based on the actual spike (iL „etc.) formed in the same loop of the previous cycle, t, e,

 n. A. before. n, d. before pr prrd

In this case, the correction code a L ,, prrd and the sign code of this correction are received respectively from the first and second information outputs of the memory block 9 (FIG. |). As soon as the code is compared with the code Lg, dtrrd, the trigger 17 is triggered (FIG. 3), and the Start of deceleration command appears at the second output of the block 7 for determining the start of braking, according to which the drive of the rolls starts braking to a predetermined ejection speed ( V), in block 6 of the memory, the unadjusted code of the rolled ingot length is recorded before the start of braking (Lp.a), which is formed in counter II at the time of the start of braking. For the same command, block 8 of the start of braking correction based on the actual surge is ready for correction of the code L a

At optimum overshoot, the speed of the drive V is equal to V at the time of roll out of the rolled stock. In this case, both the AND 19 and 20 schemes are closed (Fig. 4), the correction sign code 00 is entered in the correction sign register 23, and the correction value counter does not receive pulses from the roll angle sensor 3. At the moment of stopping the drive, the trigger 17 is set to the logical o and the Start of braking command is reset, as a result of which the pulse shaper 21 generates a logical impulse 1, which records the current correction sign 00 and the current correction value 00 in memory block 9 (FIG. .1) at the address of the current pass and after completion of recording this information on a pulse of logical 1 from the output of the pulse shaper 29 (FIG. 4), a reset occurs in the O register 23 and the counter 30.

In case of an early emission of V “more than V at the moment of emission of rolled steel from the rolls. In this case, the signal of a logical l is obtained at the output of the circuit AND 20 and the pulses from the sensor 3 of the angle of rotation of the rolls will be fed to the counter 30 until the speeds V and V c are compared. In the register 23 of the correction symbol, the code of the negative sign 01 is entered, and the output of the counter 30 will contain the current correction code. At the same time, if the sign of the current correction from the output of register 23 coincides with the sign of correction of the skip of the previous cycle of the same name from the First information output of memory block 9 (Fig. 1) or the sign of the correction of the skip of the previous cycle of the same name was zero, then the control input of the switch 28 (FIG. 4 will receive a logical 1 signal and in the counter 30 a complete correction of the start of deceleration on the actual outlier will be formed. If the sign of the current correction does not match the correction sign of the skip of the previous cycle of the same name, then the pulse sy rotation angle sensor 3 rolls in counter 30 will flow through the frequency divider 27, the partial image korretsii code. Then, the optimum analogous

to the ejection, at the moment of stopping the drive, the code of the sign of the correction and its value is recorded in block 9 (FIG. 1) of the memory and reset in the O register 23 (FIG. 4) and the counter 30.

With a late release, U "is equal to

when rolled in rolls.

I to

0

five

0

V,

In this case, the signal of the logical order at the output of the circuit And 19 and the pulses from the sensor 3 of the rotation angle of the shaft will go to the counter 30 until the rolling out of the rolls. In the correction sign register 23, a positive sign code 10 is written, and the current correction code is present at the output of counter 30. Further operation of the device is similar to work with an early release.

Using the Manual brake command, the operator can brake the drive at his discretion.

The use of the device compared to the known by introducing

5 of the second memory unit will allow complete and partial correction of the NT in terms of the actual ejection and, thereby, simplify the device, as well as improve the accuracy of achieving V g-, by

0 under the influence of alternating perturbations.

Claims (2)

Claims 1. Device for automatic 2g-braking of rolled products to a given speed, comprising a rolled edge sensor, a rolled stock sensor, a roll angle sensor, a speed sensor, a laminated measuring unit 40 ingot lengths before the start of braking, the memory block, the block for determining the start of braking and the block for correcting the start of braking based on the actual ejection, the first input of the block 45 ka measure the length of the ingot before the start of braking is connected to the inverse output of the sensor, the rolled edge, the second input is connected to the direct output of the sensor having  rolled in the rolls and the first input of the block for correcting the start of deceleration according to the actual ejection, the third input is connected to the output of the sensor of the angle of rotation of the rolls and the second input ( 55 correction of the start of deceleration according to the actual outburst, the fourth input is connected to the first output of the block for determining the start of braking, and the first output of the measuring unit of the ingot length of the ingot is connected to the information input of the memory unit and the first input which is connected to the input terminal. Manual braking of the device, the second output of the block for determining the moment of the start of braking is connected to the output terminal. Start of braking of the device and the third named by the input of the deceleration start correction module according to the actual ejection, the address input of the memory unit is connected to the input terminals of the device's skip number, the fourth input of the deceleration start correction block by the actual ejection is connected to the inverse output of the rolled-in sensor, the output of the speed sensor is connected to the fifth input a start-up correction unit for the actual spike, the sixth input of which is connected to the input,; and by the peak temperature of the device, characterized in that, in order to increase the productivity of on, it is equipped with a second memory block, the first and second information inputs and the input whose record is connected respectively to the first, second and third outputs of the actual outflow deceleration correction unit, the first information output of the second memory unit is connected to the sixth input of the beginning moment determination unit deceleration and the seventh input of the deceleration start correction unit based on the actual surge, the second information output of the second memory unit is connected to the seventh input of the deceleration time-start brake unit, addr The common input of the second memory block is connected to the input of the device's pass number, the input of the first memory block is connected to the second output of the measuring unit of the rolled D / 1INY ingot until the start of braking, and the information output is connected to the fifth input of the block for the start of braking, the third the input of which is connected to the output of the speed sensor, and the fourth input is connected to the direct output of the rolling stock sensor in rolls, the fifth input of the measuring unit of the rolled ingot length before the start of braking is connected to the inverse sensor output availability rolled in rolls. 2. The device according to claim 1, characterized in that the measuring unit of rolled ingot-i ingot before braking begins contains: circuit AND, summing counter and pulse former, with nepBbui input of circuit AND connected to the first input of the unit, second input connected to the second 10 input of the block, the third input is connected to the third input of the block, a quarter; the input is connected to the fourth input of the block and the input of the pulse generator, and the output is connected to the counting input 5 of the summing counter, the Reset O input is connected to the fifth input of the block, and the output is connected to the first output of the block, the output of the pulse shaper is connected to the second output of the block. 03. The device according to claim 1, characterized in that the block for determining the start of braking contains the first and second comparison circuits, an adder-subtractor, an HS 5 circuit and a trigger, the first information input of the first comparison circuit being connected to the first input of the block, the control input connected to the fourth input of the block, output connected to the second 0 input of the OR circuit, the second information input connected to the output of a totalizer-subtractor, the control input of which is connected to the sixth input of the block, the first information input connected to the seventh input of the block a, and the second information input — with the fifth input of the block; the first input of the Sh1I circuit is connected to the second input of the block, and the output is connected to the input; setting 1 is a trigger; its output is connected to the second output of the block; the output of the block, and the input Installation O is connected to the output of the second comparison circuit, the 5th input of which is connected to the third input of the block. 4. The device according to claim 1, of which is that the block for correcting the start of braking on the actual surge contains the first and second comparison circuits, the first, second third cxeNu I, the first and second pulse shapers, the first and second circuits OR, register, frequency divider, switch and summing counter, the first input of the first NBJ circuit is connected to the fifth input of the block, the second input is connected to the sixth input of the block, the direct output is connected D Lj . Mann mtfufffftfi e 1 y ET I6 T Speed bybrose , Record Htnet nrv wy  Nachal 1I #u1 1 y ET Jl , Record Fig 2 Fig.Z