SU743739A1 - Apparatus for automatic tracing of welded seams and stopping of reversible rolling mill - Google Patents

Description

(54) DEVICE FOR AUTOMATIC SUPPORT OF WELDS AND STOP REVERSIBLE ROLLING MILL

one

This invention relates to automatic process control in rolling mills.

A device for automatically tracking welds and stopping a reversing rolling mill is known, which includes impulse sensors for the length (speed) of a strip, a button for manually entering information about the passage of a seam, a control unit for the drives of the mill, and a control computer (UVM) Od.

This device performs, starting from the second pass, an automatic slowdown of the mill during the passage of the seams and an exact stop at the end of the passage. Memorizing the coordinates of the seams along the length of the strip on the first pass produces a CCM at the operator's signal. It also performs a calculation of stopping distance, speed, and moment of a hormone jg at certain intervals.

A disadvantage of this device is the great complexity caused by the use of a CCM and stitch tracking (i.e.

his accompaniment) the entire length of the strip. In addition, the device is not sufficiently, accurately, and reliably due to the use of information from the strip length sensor when rolling the entire roll, since the possible slippage of the friction roller, with which the pulse length sensor is connected, results in accumulating measurement errors. The error can also be caused by a discrete calculation of the braking distance, speed and braking torque.

The closest to the proposed technical entity to the achieved result is a device for automatic braking control of a rolling mill for processing a strip, comprising an unwinder with an angular velocity sensor, strip speed sensors at the inlet and outlet of the stand, strip length determination unit (remainder of the strip on the unwinder) , a block for determining the braking path and a block for forming a signal for braking 2. The inputs of the block for determining the length (stop, fabric) of the strip are connected to the outputs of the sensors, for the angular velocity of The bar and linear speed of the strip at the mill input, the inputs of the braking path detection unit are connected to the outputs of the speed sensors of the strip input and output of the mill, and the inputs of the braking signal generation unit are connected to the outputs of the strip length (remainder) detection unit and the braking path determination unit. The output signal of the brake shaping unit is fed to a mill drive control device to control the braking and stopping process. During operation of the device, the stopping distance at a given rolling speed is continuously calculated from sensor signals. This value is compared with the current length (remainder) of the strip on the unwinder and at the moment of equality a signal is generated at the beginning of the mill braking. A disadvantage of this device is the inability to accurately and reliably control the braking of the mill when rolling strip with welded. In the case of rolling such a strip, in order to eliminate its possible breakage or hollowing of the rolls of the stand, it is necessary to reduce the rolling speed, pass the weld seam through the cage at a lower speed, and then increase the speed again to the working value, and to ensure maximum production The camp, the execution time of all these fore should be minimal. This device does not provide the possibility of such braking control of the mill. The purpose of the invention is to improve the accuracy and reliability of the device when rolling strip with welds. The goal is achieved in that the device containing speed sensors for the inlet and outlet of the stand, sensors for the angular speed of the winders and rolls of the stand, units for determining the remaining strip on the winders, the braking path detection unit, the braking signal generation unit, and the mill drive control device, additionally, a sew tracking unit, a coordinate comparison unit, a memory unit and a seam registration unit are added, with the seam tracking unit input connected to the output of the coordinate comparison unit, as well as with the outputs of the speed sensors the wasps at the entrance and exit of the stand, the outputs of the seam tracking unit are connected to the input of the mill control device, the input of the braking signal generation unit and the first input of the seam registration unit; the first three inputs of the coordinate comparison unit are connected to the outputs of the residual strip determination units on the winders and the output of the memory unit; The first three inputs of the memory unit are connected to the outputs of the block for determining the remainder of the strip on the winders and the output of the registration unit of the seams, and the fourth inputs of the comparison unit and the memory unit together with the second input of the registration unit of the seams are connected to the mill drive control unit. During the rolling process, additional blocks and their connections provide automatic tracking of all welds (i.e., continuous determination of their coordinates), issuing a command to decrease the speed of CTaiia at the minimum possible distance from ground to stand and issuing a command to accelerate the mill to working speed after passing the seam through the cage. As a result, the accuracy and reliability of the device during rolling of a strip with welded seams is improved. FIG. 1 shows a diagram of the device; in fig. 2 is a block diagram of the block for determining the braking path; in fig. 3 is a block diagram of a braking signal generation unit; in fig. 4 is a block diagram of a memory block; in fig. 5 is a block diagram of the registration of seams; Fig. 6 is a block diagram of a suture tracking unit; in fig. 7 is a block diagram of the coordinate comparison unit. Reversible rolling mill contains stand 1, left 2 and right 3 winders. The right (P) and left (L) directions of rolling are indicated by arrows. The device contains sensors 4 and 5 of the speed of the strip at the entrance and exit of the stand, sensors 6 and 7 of the angular speed of the winders, sensor 8 of the angular speed of the rolls of the stand, seam sensor 9 (instead of the seam sensor, you can use another source of information about the passage of the weld at a certain predetermined distance rolls of the stand, for example, a button for manual entry of information). In addition, the device contains blocks 10 and 11 for determining the remainder of the strip on the winders, the braking path determining unit 12, the braking signal generating unit 13, the mill drive control device 14, the stitch tracking unit 15, the coordinate comparison unit 16, the memory block 17, seam registration unit 18. The device also has a switch 19 of the outputs of the speed band sensors, a switch 20 of the outputs of the angular speed sensors of the winders and a switch 21 of the outputs of the control blocks of the remainder of the strip on the winders. Switching these switches is carried out by the drive control device of the mill when the rolling direction is changed. In any direction of rolling, the sensors and the block for determining the remainder of the strip, which correspond to the entrance to the side of the mill for a given pass, are connected to the inputs of the braking signal forming unit and the torch path detecting unit. Between blocks 12 and 13 there are two connections, through which block 13 receives signals corresponding to the values of the mill's braking path in 2 modes of operation - stopping and decreasing the speed for passing welded AEE. Correspondingly, between block 13 and device 14 there are also two connections, through which control signals are transmitted to the braking of the mill in the indicated 2 modes. The output connection of the device 14 with the fourth inputs of the blocks 16 and 17 and the second input of the block 18 is intended to give a signal about the rolling direction. In accordance with this signal, in blocks 16 and 17, a signal from one of the blocks 10 or 11 connected to them is used, and in block 18, the seams are transferred, passing in one passage from one reel to another. Sensors 4-7 are of the pulse type, the frequency of the output pulses of these sensors is proportional to the measured speed. A tachogenerator is used as the sensor 8, the output voltage of which is proportional to the speed of the stand rolls. The braking path determination unit 12 consists of multipliers 22 and 23 of the multiplier 24 of the device with scaling and the scaler 25. One of the inputs of the device 22 through the switch 20 is connected to the sensors 6 or 7 of the angular velocity of the winders, the second input of this device is connected to the sensor 8 of the angular velocity of the rolls of the cage. The output of the device 22 is connected to one of the inputs of the device 24. One input of the device 23 is connected to the sensor 8, the second through a switch 19 with sensors 4 or 5 of the speed of the strip at the entrance of the stand. The output of the device 23 is connected to the second input of the device 24 and 5 at the same time, to the input of the device 25. The third input of the device 24 is connected to a constant signal source. The outputs of the devices 24 and 25 are the outputs of block 12. The BLOCK 12 operates as follows. The multiplier 22 generates a signal corresponding to the product. The multiplier 23 generates a signal corresponding to the product. The device 24 performs the summation and mass stabilization of the signals P., PI, and similarly, the output signal of the device 24 corresponds to the left side of formula (1), i.e. the block calculates the braking distance in revolutions of the unwinding winder. The device 25 masses the P-value, i.e. multiplies it by a constant coefficient K. Thus, at the second output of block 12, a signal is generated that implements formula (2) and corresponds to the calculated braking path S. UNIT 13 of the formation. The deceleration signal consists of two code-analog conversion devices 26 and 27 and two comparison devices 28 and 29. The input of the device 26 is connected via ,,, 21 to the drives of the blocks 10 and 11 for determining the remainder of the skimming on the winder. The output of the device 26 is connected to one of the inputs of the device 28. The second input of the device 28 is connected to one of the inputs of the braking path determination unit 12. The output of the device 28 is the output of block 13. The input of the device 27 is connected to the output Vg of the stitch tracking unit 15. You of the device 27 is connected to one of the inputs of the device 29. The second input of the device 29 is connected to the second output of block 12. The output of the device 29 is the second outlet of the block 13. The block 13 works as follows. At the input of the device 26 continuously receives the code signal of the remainder of the strip RSC input coiler mill. From the output of the device 26, this signal, converted to analog form, is fed to one of the inputs of the device 28, which compares this signal with the signal of the calculated braking path to stop the mill at the end of the passage coming from When these signals are equal and the output of the device 28 and, therefore, At the output of block 13, a relay signal appears to command the mill to brake, / 74 entering the mill control device 14. A code signal from the seam located on the entrance side to the rolling zone is fed to the input of the device 27. From the output of the device 27, this signal, generated in analog form, is fed to one of the inputs of the device 29, which compares this signal with the signal of the calculated deceleration path to slow down the mill as the junction passes through the rolling zone coming from block 12. These signals at the output of the device 29, and, consequently, at the second output of the block 13, a relay signal appears to command the mill braking, which enters the drive control device 14 of the mill. The memory block 17 includes memory registers 30 and Ator 31i32 switch inputs 31 associated with rows Rin, MJj and u "block. The inputs of switch 32 are connected to inputs U,., And p, of the unit. The outputs of the registers 30 are connected to the outputs K d, K ... Cg1 block. The internal connections of the unit are shown in the drawing. The unit works as follows. Depending on the rolling direction signal and q, the switch 31 connects to the switch 32 signals of the remainder of the strip on the winder 2 or 3 - Dm. or respectively. In the P direction of rolling, the signal H is connected, and in the L signal. The switch 32 receives impulse signals about the number of the seam piped onto the winding reel - Uy .. A), -. For each of these signals, the switch 3 writes the signal of the remainder of the band on the winding coiler to one of the AOR registers. In each register, the coordinates of a specific seam are recorded from the outputs of the registers, the signals corresponding to the coordinates of the shvs K ... K are entered into the comparison device 16, the Block 18 of the registration of the schvs consists of counters 33 and 34, decoders 35 and 36, pulse formers 37 and 38 and elements 39 OR. The inputs of the counters 33 and 34 are connected to the inputs of the L and P block, as well as the inputs The outputs and ... Un of the block are connected to the outputs of the elements 39. The block works as follows. 8 Depending on the direction of rolling (L or P signals), one of the counters 33 or 34 operates, When a signal arrives at VJc- or Uc.JF, the seam leaves the tracking zone and enters the winding winder, counter 33 or 34 is activated. the counter enters the decoder 35 or 36, from the outputs of which signals are removed about the presence of a specific seam on the coiler 2 or 3 "Formers 37 or 38 form pulses when a signal appears on each seam. These pulses are fed to the elements 39. OR, the output pulses of which U,.., Ur, are fed to the device 17 and control the recording of the coordinates of the ground holes. Since the seam that comes first on one coiler, for the other is the last (d), the OR element, whose output signal and g issues a command to record the 1st seam, receives impulses generated from the signal m from the first decoder output 35 and of the th output of the decoder 36, to the element OR with the output UQ pulses, formed on the 2nd output of the decoder 35 and (n -1) the output of the decoder 36, etc. The suture tracking unit 15 consists of two counters 4O and 41 (for example, binary), two decoders 42 and 43, respectively, with three and two outputs and two logic devices 44 and 45. Inputs W y (and W 2 blocks are connected to the corresponding outputs of the block 16 comparing the coordinates, the LH input is connected to the seam sensor 9, and the inputs DI / | and sensors 4 and 5, the Uc outputs and from the block, are connected to the inputs of the block 18, and the outputs OA and to the inputs of the device 14. The device 14 is connected and the inputs P and L. of the block. The output Ug is connected to the input of block 13, the Intercommunications of the block are shown in the drawing. works as follows. When rolling in the first pass (direction P, Fig. 1), the input of the central block of block 15 receives a signal about the passage of a seam at the installation location of sensor 9. At this signal, device 44 sends a signal to counter 40, which starts counting pulses from sensor 4 When the number of pulses arriving at the counter corresponds to the distance from sensor 9 to the stand, a signal arriving at device 45 will appear at the first output of decoder 42. At this signal, device 45 gives a signal of a seam in the rollers (at device 44) and reset (on the counter 40 and the device 44), the device 44 removes the enable signal from the counter 40 and delivers this shm-sl to the counter 41, which starts counting the pulses of the sensor 5. When the number of pulses corresponding to the selected value of the seam tracking zone arrives at the counter 43 a signal arrives on. device 45. Therefore, the device 45 signals the seam exit from the zone (to the output of the UCQ block) and reset (to the counter 41 and the device 44). The device 44 removes the enable signal from the counter 41. And prepares the enable signal to the counter 40. This signal arrives at the counter 40 after the signal about the next seam comes from the sensor 9. The next seam is escorted in a similar way. When rolling in the second pass (direction L, Fig. 1), at the time of the seam exit to the tracking zone defined by block 16, a signal is received at input W of block 15, according to which device 44 gives permission to counter 41 starting to count sensor pulses 5 ( input O. and j), At this time, at the output of U and further on, block 13 receives information about the current distance from the seam to the cage. When comparing this value with the calculated value of the braking path, the mill is slowed down for rolling the weld at low speed. After the required number of pulses arriving at the counter, corresponding to the size of the tracking zone, at the first output of aeLuiiCpaTopa 43, a signal is received, according to which device 45 generates signals of a seam in the rollers (to device 44) and a reset (to counter 41 and device 44). At this moment, the device 44 removes the resolution signal from the counter 41 and sends this signal to the 4Os counter, which begins to count the pulses of the sensor 4. When the counter receives the number of pulses corresponding to the specified distance from the seam from the stand, the second output of the decoder 42 is is a signal at which device 45 provides a signal at the output of the block and then to device 14 to accelerate the mill to the working rolling speed. After the number of pulses arriving at the counter 40, corresponding to the value of the tracking zone, a signal appears on the third output of the decoder 42

The device 45 sends signals to the seam from the zone (to the output of the U block), and the reset (to the 4O counter and the device 44), the Device 44 removes the enable signal from the counter 40 and prepares the enable signal to the counter 41. This signal goes to the counter 41 after the arrival of a signal at the input W of the block, about entering the tracking zone, follow the weld. Thus, the remaining seams are accompanied, with the approach of each seam to the stand, the mill slows down, and after the seam has departed for a given distance from the rollers it accelerates again, and the block 15 works in the third and subsequent passages in an analogous manner. On the third pass, the signal about the entry of a seam into the tracking zone is fed to the input W of the block. The coordinate comparison unit 16 consists of two groups, the equivalence logic devices 46 and 47, the switch 48 and the logic device 49. Inputs and M2. the unit is connected to the outputs of blocks 10 and 11, the inputs to the outputs of block 17, the inputs P and L to the device 14, the outputs W, and W are connected to the inputs of the unit 15. The internal connections of the unit are shown in the drawing. The unit works as follows. During each passage of group 46 and 47, codes are compared that come from the registers of block 17 to the inputs Cd ,,, K p; with codes received from blocks 1O and 11 via inputs,, y (and Сигна Signals of equipotent codes are sent to switch 48, which switches one of these signals to output Sh d or по by the command of device 49, Device 49 receives signals about the direction of rolling (P and L) and about the order of recording information in the registers of block 17 (signals U On this basis, one of the groups 46 or 47 and one of the devices of each group are selected (respectively, inputs Kd ... K), such the way that the code from the residual determination block is compared, polo on the entrance side of the mill for a given pass) with codes corresponding to the seams on the same side of the mill listed in the registers of block 17. Moreover, a comparison with the codes of the seams makes in the order opposite to their entry in the memory register. the exit of the groove from the roll on the unwinding winding machine and entering it into the tracking zone. At these moments, at one of the outputs of the block (W. or a signal appears, which we enter into block 15, the Block for determining the remainder of the strip on the winders represents em in the simplest terms learn reversible counter, for example, binary. When winding a strip on a coiler corresponding to this motochse, the residual determination unit summarizes the pulses of the sensor connected to it, and when winding the strip, subtracting the pulses from the number entered in the counter. The device works as follows. When rolling the strip in the first pass (direction P) from sensor 9 to block 15, a signal is given about weld penetrations at the sensor installation site, i.e. at a certain distance from the stand rolls (in the absence of a weld sensor, signals about the passage of welds into, After the signal is received, the seam tracking begins, t, e, continuous determination and registration of its distance to the rolls of the stand (on the input side by the signal from sensor 4, on the output by the signal of sensor 5). The size of the tracking zone at the entrance and at the exit of the stand was chosen equal to the maximum possible length of the braking path. When the seam passes, the edge of the tracking zone from block 15 to block 18 is given a signal to register the seam in a roll on coiler 3. Thereafter, the signal from block 18 to block 17 causes the angular coordinate of the seam to be remembered in revolutions of coiler 3. The value of This coordinate is fed to block 17 from block 11 (in accordance with the information on the rolling direction, which arrives at the fourth input of block 17 from device 14, with direction F, the memory from block 11 is written to memory, data from block 10 by this tracking of the seam in this course is stopped. Similarly, the rest of the seams are followed and their angular coordinates are stored in the memory of block 17. At the end of the first pass in block 18, all the seams in the roll on the right reel are recorded, in block 17 the angular coordinates of these seams are recorded , and in block 11, the total number of turns of the strip on the coiler 3 is fixed (in angular units) .When the rolling direction changes to L, device 14 switches commutator 743 tori 19 and 21 to position L and sends the corresponding signal to blocks 16, 17 and 18. the process of n in block 16 a continuous comparison of the angular coordinates of the welds included in the memory circuit of block 17 from the current angular coordinate strip coming from block 11 occurs. At the moments of equality of these coordinates from block 16, signals 15 are sent to block 15, which are followed by from seams similar-. but described above (before the cage - at the signal of sensor 5, after the cage - at the signal of sensor 4). This process continues until the exit of each seam from the tracking zone, and at these moments, according to signals from block 15, block 18 registers a seam in a roll on coiler 2, after which the signals of block 18 in the memory circuit of block 17 are transferred from block 1O to new angular coordinates of the seams (in revolutions of winder 2). In the process of accompanying each seam (when it approaches the stand), block 15 continuously determines the current distance from the seam to the rolls of the stand, and in block 12, the braking distance from the given rolling speed to the specified weld skip speed is continuously calculated from the signals of the speed sensors. (in the passage under consideration, with the rolling direction L, sensors 5, 7 and 8 are connected to block 12). Both of these signals from blocks 12 and 15 are applied to block 13, where they are compared. When the current distance from the weld to the glue becomes equal to the braking distance from unit 13, device 14 receives a signal to start braking, and the braking process itself, controlled by device 13, is continuously corrected by the difference signal of the two values (this signal continues to flow from block 13), the weld seam passes through the cage at a reduced speed, while its maintenance continues with block 15. After removing the seam from the cage for a predetermined distance from block 15, the device 14 is given a signal to accelerate the mill to working her rolling speed. Thus, all the seams of the coil are skipped. In the weld pass mode, the calculation of the braking path is performed by block 12 in linear values. At the same time, block 12 will calculate the braking distance and in angular values (with the rolling direction L, in revolutions of the winder 3). This signal is on the second line

The connection shown in the drawing is also supplied to block 13, where it is compared with a signal from block 11 proportional to the remainder of the strip on the winder 3. At the end of the passage, when the continuously decreasing remainder of the strip on the unwinding winder 3 becomes equal to the braking distance from the block 13, the device 14 (also via the second communication line) receives a signal for braking and stopping the station-io; The braking process is also corrected by the difference signal indicated by the larger one coming from the unit 13. The device works similarly in the modes of welding welded wow and stop the mill in all subsequent passes. BLOCK 12 operates as follows. In this block, a continuous calculation of the braking path in angular values is performed taking into account the rolling speed, the strip thickness and its reduction, which is necessary for optimal control of the mill braking. This calculation is made according to the formula V.-V .. cuV w ... l --- vMi k o 4-k o il t STtaRo o UA Va (i} where -I is the braking path in turns of the unwinding winder; cage inlet; circumferential speed of cage rolls; angular speed of unwinding winder; UQ - winder drum radius; C5l - cage acceleration; VQ - reliability zone size (behind the strip to compensate for errors in braking control); -;) - V, p, CO V j are the components of V and PV / V. Signal based on signal KJ t / 8KdjK -V8jCdRQ-constant proportionality coefficients. The required deceleration path S for controlling the mill in the weld pass mode is determined in the same block 12 and in linear values using the formula -NP .; , J- -v - .- (2) where / (| is a constant coefficient of proportionality. As can be seen from the comparison of formulas (1) and (2), the calculated value of S differs from one of the terms of formula (1) only by the proportionality coefficient. Therefore when determining in the deceleration path block 12, one of the intermediate values can be used to determine the value. This greatly simplifies the circuit of the block 12.

The determination of the remainder of the strip on the winders {and, accordingly, the braking path in the mill stop mode) is performed in the device in angular values, which improves the accuracy of operation. Two-body, in this case, sensors 6 and 7 rigidly jointed with winders are used to determine the remainder of the strip, while determination of the remainder in linear values would require the use of sensors 4 and 5 jointed with friction rollers. Even a small slip of the friction rollers relative to the controlled strip can lead to the formation of accumulating errors in determining the length, which is especially noticeable when rolling large coils. For the same reason, in the mode of passing welds, the angular values are also mainly used (linear values are used only when accompanied by seams in small areas in front of and behind the cage). In addition, the use of the principle of memorizing the angular coordinates of welded PCBs (in block 17) when entering seams into each roll greatly simplifies the device, as it eliminates the need for a device to monitor each seam throughout the rolling of the roll. Schemes of blocks 15-18 it is advisable to perform discrete (digital), which will provide a relatively small of them. complexity and high accuracy of work. The improved accuracy and reliability of the device operation achieved as a result of using the proposed device makes it possible to begin braking the mill (as the seam approaches the stand, its subsequent acceleration after the seam passes through the stand) at minimum distances from the root to the stand rolls and, moreover, deceleration and acceleration in minimum time. m. As a result, the total rolling time of the coils is reduced, i.e. the productivity of the mill is increased, the risk of a strip rush and roll breakage is reduced when a seam hits the cage. So, for example, at a rolling speed of 5 m / s and a given braking rate of 1 m / s, the device sends a signal to the mill braking at a distance from the seam to the cage of 12-14 m, which is approximately two times less than the same distance manual mill control. The effect of using the pre-burned device can be especially significant when rolling long rolls with a number of welds. Invention about the device for automatic tracking of welds and stopping of the reversing rolling mill containing speed sensors of the strip at the entrance and exit of the stand, sensors of the angular speed of the winders and rolls of the stand, strips for determining the rest of the strip on the winders, block for determining the path deceleration, a deceleration signal generating unit and a mill drive control device, characterized in that, in order to improve the accuracy and reliability of operation when rolling a strip with welds, additional blocks are introduced into it to the seam tracking, the coordinate comparison unit, the memory block and the seam registration unit, the inputs of the seam tracking block 25 are connected to the output of the coordinate comparison unit, as well as

the memory unit is connected to the outputs of the block for determining the remainder of the strip on the winders and the output of the joint detection unit, and the fourth inputs of the unit of comparison of coordinates and the memory unit together with the second input of the joint detection unit are connected to the drive control unit of the mill.

Sources of information taken into account in the examination

1. Electric equipment adjustment for cold rolling mill. Theses of reports. Seminar L., 1977, p. 85.

2, USSR Author's Certificate No. 362283, cl. G 05 B 19/30,

At 65 N 25/32, 1971. with the outputs of the speed sensors of the strip at the entrance and exit of the stand, the suction tracking unit inputs are connected to the input of the mill drive control unit, the input of the braking signal generation unit and the first input of the seam detection unit, the first three inputs of the comparison unit coordinates are connected to the outputs of the blocks determining the remainder of the strip on the winders and the output of the memory block, the first three inputs

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Claims (1)

Claim A device for automatically matching welds and stopping the reverse rolling mill, containing strip speed sensors at the input and output of the stand, angular speed sensors of coilers and mill rolls, blocks for determining the remaining 15 strips on coilers, a block for determining the braking path, a forming unit the brake signal and the drive control device of the mill, characterized in that, in order to increase the accuracy and reliability of work when rolling a strip with welds, an additional block for supporting the weld is introduced into it, b ok coordinate comparison, a memory unit and a seam registration unit, the inputs of a seam tracking unit 25 connected to the output of the coordinate comparison unit, as well as the outputs of the strip speed sensors at the input and output of the stand, the outputs of the seam tracking unit connected to the input of the mill drive control device , the input of the braking signal generation unit and the first input of the seam registration unit, the first three inputs of the coordinate comparison unit are connected to the outputs of the strip balance determination units on the coilers and the output of the memory unit, the first three ode memory unit are connected to the outputs of blocks determination remnant band pas winders and output registration unit seams and fourth inputs coordinate comparison unit and the storage unit together with the second input of the register coupled with seams mill drive control device.