SU1178553A2 - Apparatus for controlling the drive of multistand shape-bending mill with slitting of stock on the run - Google Patents

Abstract

1. DEVICE OF CONTROL OF THE DRIVE OF A MULTICELET PROFILE MILLING MILL WITH A CUTTING HIRE INTO THE CURVE Qto auth.St. No. 1049200, characterized in that, in order to increase the mill productivity, it further comprises a strip end sensor and a third control unit, the first, second, third, fourth and fifth inputs of which are connected respectively to the strip end sensor, cut sensor, rental movement sensor , the output. the calculator and the unit for the length, and the first and second outputs are connected to the second command inputs of the first and second control units, respectively.

Description

2. A device according to claim 1, characterized in that the third control unit comprises a constant controller, an adder, a counter, four discriminators, a coincidence circuit, three triggers, two key circuits, the outputs of which are connected to the first and second cutting sections of the last profile control unit, respectively roll, in which the first input is connected to the C-input and the inverse R-input of the counter, the first S-inputs and the inverse R-inputs of the triggers, the second passage - with the first and second inputs of the first key circuit, the third input - with the counting input of the counter,. the fourth input — with the first inputs of the adder, the first and second discriminators; the fifth input — with the first inputs of the third and fourth discriminators; the second input of the third discriminator is connected to the output of the adder; the first, second, third, and fourth outputs of the constant setter are connected to the second inputs the first discriminator and

the adder, the second input of the second discriminator, the second input of the fourth discriminator and the first input of the coincidence circuit, the second input of which is connected to the counter output, and the output to the first and second inputs of the second key circuit, which has the third input connected to the output of the first trigger, and the fourth input with the output of the second trigger and the third input of the first key circuit, connected by its fourth input to the output of the third trigger, the output of the first discriminator is connected to the second S-inputs of the first and second triggers, the first and second the outputs of the second discriminator are connected respectively to the second S-input of the third trigger and the third S-inputs of the first and second triggers, the output of the third discriminator is connected to the third S-input of the third trigger, the first and second outputs of the fourth discriminator are connected to the fourth inputs of the first and second triggers, respectively.

one

The invention relates to the automation of rolling production, in particular, to systems of an automated electric drive for the mechanisms of a roll forming mill.

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

FIG. 1 shows a functional diagram of the proposed device; in fig. 2 is a functional block diagram of the control unit for cutting the last roll profile; in fig. 3-7 are possible positions of the cutting place on the strip relative to the end of the unwinding roll.

The device (Fig. 1) contains a roll forming mill 1, a digital speed setting unit 2, a follower roller 3 with a pulse pickup sensor 4 for rolling, the first control unit 5, the bat shears 6 with electric drive 7 the second control unit 8 of the cut sensor 9, the sensor 10 are volatile the scissors in the initial state, the scheme 11 coincidence, the calculator 12, node 13

tasks, master 14 lengths, communication node 15, block 16 of counters, block 17 programs. The first, second, third, fourth and fifth inputs of the program block 17 are connected respectively to the cut sensor 9, with the rental movement sensor 4, to the output of the communication node 15, to the task node 13, to the first control unit 5, and the first, second and the third outputs, respectively, with a speed reference, with the first input of the communication node 15 and with the input of the block 16 of counters. The first and second outputs of the meter unit 16 are connected respectively to the input of the coincidence circuit 11 and to the second input of the communication unit 15, the rety input of which is connected to the output of the calculator 12.

The communication node 15 contains a block 18 of the master registers, an adder 19 and a discriminator 20. The output of the latter is connected to the output of the communication node 15, the first and second inputs of which are t: 6 connected to the third input of the communication node 15 respectively and to the output of the adder 19, First and the second inputs of the adder 19 are connected respectively to the second input of the communication node 15 and the output of the block 18 of the master registers, the input of which is connected to the first input of the communication node 15. Roller 21 is designed for cleaning profiles 22 with flying scissors 6. Minimum allowable profile length according to the conditions of the order is the same for the entire range of profiles of this mill, ifllnc- Mobile box 23 is designed for collecting and cleaning short sections that are cut into profiles of length less than than l. . The device also includes a strip end sensor 24 and a third control unit 25, the first, second, third, fourth and fifth inputs of which are connected respectively to the strip end sensor 24, the cut sensor 9, the sensor 4, the output of the transmitter 12 and the length adjuster 14. The first and second outputs of the control unit 25 are connected to the second command inputs of the first control unit 5 and the second control unit 8, respectively. The third control unit 25 (Fig. 2) contains a constant setting unit 26, an adder 27, a counter 28, a discriminator 29-32,; to a 33 matches, triggers 34-36, key circuits 37 and 38. Triggers 34-36 each have four S- BXOda, combined according to the scheme And, and one inverse R-input. The outputs of the key circuits 37 and 38 are connected respectively to the first and second outputs of the third control unit 25, in which the first input is connected to the C input and the inverse R input of the counter 28, the first S inputs and the inverse R inputs of the flip-flops 34-36, the second input is with the first and second inputs of the key circuit 37, the third input is with the counting input of the counter 28, the fourth input is with the first inputs of the adder 27 and the discriminators 29 and 30, the fifth input with the first inputs of the discriminators 31 and 32. The second input discriminator 31 is connected to the output of the adder 27. The first, second, third and the fourth outputs of the constant setting unit 26 are connected respectively to the second inputs of the discriminator 29 and the adder 27, the second input of the discriminator 30, the second input of the discriminator 32 and the first input of the matching circuit 33, the second input of which is connected to the output of the counter 28, and the output to the first and second inputs key circuit 38, the third input of which is connected to the trigger output 34, and the fourth input to the trigger output 35 and the third input of the key circuit 37, in which the fourth input is connected to the trigger output 36, the output of the discriminator 29 is connected to the second S-inputs and triggers 34 and 35, the first and second outputs of the discriminator 30 are connected respectively with the second S-input of the trigger 36 and the third S-inputs of the triggers 34 and 35, the output of the discriminator 31 is connected to the third S-input of the trigger 36. The first and second outputs of the discriminator 32 connected to the fourth B-inputs, respectively, of the triggers 34 and 35. Between the following rollers 3 and the flying shears 6 (Fig. 1) there is a split-control A B zone, shown in detail in FIG. 3-7. The length of this zone L is accepted such that where Lj, ri t is the minimum allowable length of the profile according to the conditions of transport on the roller table and. the possibility of cleaning the profile of flying scissors; a - stock. Zone AB is divided into two sections: AB length, and BB length C, where L (igp d is the path of the strip from the beginning of the acceleration of scissors to the moment of cutting at the maximum speed of profiling. Thus. L, + pbr t "x it is assumed such that the first feather where pnin is the path of the strip from the beginning of the acceleration of the flying scissors to the time of cutting at the minimum speed of the profiler ,, L from the flying scissors. Distance from point 6 to the place indicated by point D in FIG. the strip fixes the end of the unwinding roll, is chosen so that L kr sr - Js break from the track of the center of the flying shears. The distance L (.p is assumed to be minimal. It is determined by the design of the roll forming mill and the shears, as well as by the conditions for replacing and adjusting the knives when changing the sizes of the profiles produced by the mill. In addition, the distance is taken from the condition that 2 Lminc C) 1-2 7, (5) where C is the length of the LW section in Fig. 3-7. The system works as follows. The coincidence circuit 11 issues a signal to the first command input of the second control unit 8 at the moment when the specified scheme fixes the equality of the remaining to cut and the bands LQJ .-, -, counted by the calculator 12 and the path L rcr; which is recorded in the corresponding counter of block 16. At the point in time when the sensor 24 of the end of the strip detects that the rear end of the roll is located at a distance from the axis of the flying shears, i.e. at point D in FIG. 3-7, the path L to the cut may be greater or less than the value. Accordingly, the cut point will be found to the left. Or to the right of point D and FIG. 3-7. In these figures, the required cutting place on the strip is indicated by a point T. If at the time of the sensor 24 of the end of the strip is triggered, the situation is shown in FIG. 3, i.e. Ost, kr 2 ,. where & 1 is the value of the stock, then there can be no slash. Therefore, the signal for accelerating the flying scissors 6 to the second, control unit from the third control unit 25 or from the circuit 11 does not match, and after the rear end of the roll leaves the flying scissors 6, roll profiling: ends. Taking into account relations (1), (2), (4) and (5), the length of the last unmeasured profile will be more than the minimum permissible values. t, .t and ™ .bt (ps, i.e., there will be no rejection. If at the time of the sensor 24 of the strip's operation there is a situation, shown in Fig. 4, i.e. 3 "A + a, - L, then The cut will be made according to the signal of the matching circuit 11 to the second control unit 8. Taking into account relations (4) and (5), the last profile will have an acceptable length. If at the moment of the sensor 24 of the end of the strip there is a situation shown in Fig. 5, t. This is the signal of the sensor 24 transfers the trigger 35 to one state. The next measured cut will be performed according to the signal of the circuit 11 to the block 8. After the end of the cut, the signal from sensor 9 causes the signal of the ES at the output of circuit 37. This signal is sent to the second command input of block 5, which puts the mill at a reduced speed so that the operator can cut the last roll profile in manual control mode. The situation shown in Fig. 6 takes place, i.e., -Cr 2 Cr 2 OC, this cannot be measured, since before the signal is sent to disperse the flying scissors, the strip will come out of the following rollers 3, the rollers will start slow down and the profile will be cut off acceptable extended against a predetermined value. This situation is detected by switching to the one state of the trigger 34. From the moment the sensor 24 trips the sensor, the counter 28 starts monitoring the path L of the strip, counting the pulses of the sensor 4. When the band passes the path LL, which is fixed by the output signal from the coincidence circuit 33, from the output the key The circuits 38 are transmitted to the second command input of the second control unit 8, the PH signal of the acceleration of the flying scissors 6. The latter cut off a profile with a length of at least L. at the maximum strip speed and -Lnap) at the minimum strip speed. After the cut, a profile with a length of at least C. remains. Considering that relations (1) - (5) are maintained, the penultimate and last profiles will be conditioned. If a situation occurs at the moment when the sensor 24 triggers, the position shown in FIG. 7, i.e. KC SMD L 2 + a, then measuring cut can not be done for the same reasons as in the previous case. This situation is fixed by the transition to the single state of the trigger 35, and the counter 28, the coincidence circuit 33 and the key circuit 38 work as in the previous case. niax - Lpep „) at the minimum profiling speed. After the end of the cut, the signal of the cut sensor 9 is generated by the CS signal at the output of the key circuit 37. This signal is sent to the second command input of the first control unit 5, causing a decrease in the mill speed so that the operator can cut the last roll profile in manual control mode. The signal KP at the output of the strip end sensor 24 disappears when the front end of the next roll reaches the gauge and the automatic cutting of this roll begins. also, due to a certain choice of distances from the follower roller and the sensor of the end of the roll to be cut to the flying shears, in most cases the need to cut the last roll profiles is eliminated. at reduced speed in manual mode, which increases the capacity of the roll forming mill.

Fi.Z

Claims (2)

54) 1. DRIVE CONTROL DEVICE FOR MULTI-CIRCULAR PROFILE BENDING MILL WITH CUTTING OF RENTAL ON-THE-WAY on ed. No. 1049200, characterized in that, in order to increase the productivity of the mill, it further comprises a strip end sensor and a third control unit, the first, second, third, fourth and fifth inputs of which are connected respectively to a strip end sensor, a cut sensor, a rolling displacement sensor, the output of the computer and the length setter, and the first and second outputs are connected to the second command inputs of the first and second control units, respectively. (Pi / g / 00 SI SP 00 2. The device according to π. 1, characterized in that the third control unit comprises a constant adjuster, an adder, a counter, four discriminators, a coincidence circuit, three triggers, two key circuits, the outputs of which are connected respectively to the first and second outputs of the cutting control unit of the last roll profile, with the first input connected to the C-input and the inverse R-input of the counter, the first S-inputs and the inverse R-inputs of the triggers, the second Input - with the first and second inputs of the first 'key circuit, the third input - with the \ counting input of the counter, the fourth · input - with the first in the odes of the adder, the first and second discriminators, the fifth input is with the first inputs of the third and fourth discriminators, the second input of the third discriminator is connected to the output of the adder, the first, second, third and fourth outputs of the constant generator are connected respectively to the second inputs of the first discriminator and adder, the second input of the second discriminator, the second input of the fourth discriminator and the first input of the matching circuit, the second input of which is connected to the output of the counter, and the output to the first and second inputs of the second key oh circuit, in which the third input is connected to the output of the first trigger, and the fourth input with the output of the second trigger and the third input of the first key circuit connected to its fourth input with the output of the third trigger, the output of the first discriminator is connected to the second S-inputs of the first and second triggers, the first and second outputs of the second discriminator are connected respectively to the second S-input of the third trigger and the third S-inputs of the first and second triggers, the output of the third discriminator is connected to the third S-input of the third trigger, the first th second output of the fourth discriminator connected to fourth inputs of the first and second flip-flops.