SU1219195A1 - Control system of continuous strip rolling unit - Google Patents

Description

12

is connected to the output of the reference source, and the other is the input of the block, the output of the controlled key is one of the outputs of the block, the other output of which is connected to the output of the adder with a single-quadrant output, one of the inputs of which is connected to one of the inputs of the block and the other through a digital-to-analog converter is connected to the output of the detracting counter and to one of the inputs of the null organ, the output of which is the second output of the block, the two inputs of the deducting counter are the second and third input E unit, and a third connected to the output setpoint weld position.

Claims (1)

one The invention relates to devices for controlling units with a continuous technological process, in particular for the finishing of rolled products, units for the production of multilayer panels, etc. The purpose of the invention is to increase the strength of the seam and the quality of the surface of beaten along the ends of the strips in a continuous process without using loopback devices. FIG. 1 shows a functional system diagram; in fig. 2 is a functional diagram of the components for synchronizing the carriage stroke, surge, stop, command block, and seam flare block; The control system of the continuous bandpass unit (Fig. 1) contains surge 1 mechanisms c. a displacement sensor 2 that provides a surge of the front end of the strip 3 for mating it with the outgoing rear end of the strip 4. The mechanisms 5 of the technological part with the movement sensor 6 provide processing of the strips 3 and 4 in accordance with a given technological process. The carriage 7 is a flying stitch ma, tires with drives 8 stitching and 9 movements of the carriage stitching machine and sensors 10 stitching, 11 relative to 195 3. The system of claim 1, wherein the flare control unit comprises a displacement sensor, a counter, a comparison element, a trigger and an AND circuit, one of whose inputs is connected to one of the block inputs, the other two of which are connected to the counter inputs, the output of which is connected to one of the inputs of the comparison element, the other input of which is connected to the output of the displacement setpoint, the output of the comparison element is connected to one of the trigger inputs, the other input of which is connected to the input of the block, the output of the trigger is connected to the second input of the circuit And you the stroke of which is the output of the block. moving the strip and carriage. 12 the initial position of the carriage 7 of the flying seaming machine provides stitching along the ends of the strips 3 and 4. Sensor 13 the presence of a lane fixes the passage of lanes 3 and 4. A seam flare machine with drives 14 and 15 of the return flaring respectively and a flare sensor 16 provides flare-on-the-fly seams formed by a flying stitching machine increase the strength of the seams and improve the surface quality of the sewn-on ends of the strips 3 and 4 ... - Mechanisms 1 of the surge and 5 of the technological part have drives 17 and 18 with control blocks 19 and 20, respectively. The control unit 21 provides control of the carriage moving actuator 9, and the control unit 22 controls the control of the stitching drive 8 of the flying seaming machine. The control unit 23 controls the drives of the flaring machine 14 and 15. The setting units 24 and 25 of the speed, these changes make the speed setting signal at the inputs of the blocks 19 and 20 of the control, respectively, with the required rate. The speeds in the established operating modes are determined by mechanically coupled command devices 26 and 27, connected five nymi- to an entrance + setters 24 and 25 speeds respectively. To the second input of the setter 24 speed connected output unit 28 surge, and to the second input of the setpoint 25 speed output unit 29 stop. Two outputs of the stroke synchronization unit 30 are connected to the two inputs of the control unit 21. Flare control unit 31 is connected to control unit 23. The system contains a command block 32. The surge unit 28 has inputs 33-36 and two outputs 37 and 38, the output 38 being connected to the input + speed setter 24, the stop unit 29 has three inputs 39-41. and one output 42, the synchronization unit 30 It has four inputs 43-46 and three outputs 47-49, the flare control unit 31 has three inputs 50-52 and one output 53. Inputs 54-62 of the command unit 32 are connected to the codes of the displacement sensor 2, the output 37. the surge unit 28, the outputs of the metal presence sensors 13, 10 spins, 12 the initial position of the flying carriage 7 carriage 7, the output 47 of the synchronization unit 30, the outputs of the relative displacement sensors 11 lanes and carriages, 16 flaring and 6 movements, respectively. The outputs 63-77 of the command unit 32 are connected to the inputs 33-36 of the surge unit 28, 43-46 of the synchronization unit 30, the input of the control unit 22 for driving the 8 stitching of a flying seam machine by the inputs 50-52 of the flare control unit 31 and 39-41 of the stop unit 29. g Surge unit 28 (Fig. 2) contains in series connected overlap length adjuster 78 of the connected ends of lanes 3 and 4, a reversible counter 79, a digital-to-analog converter 80, and a zero-body 81 connected to the output of the counter 79. To inputs 33-36 The unit 28 is connected to the second, third, fourth, and fifth inputs of the reversible counter 79, respectively, and to its outputs 37 and 38, the output of the zero-body 81 and the output of the digital-to-analogue converter 80 are connected, respectively. Block 29 stop (Fig. 2) contains connected in series , . 219195- The boundary displacement sensor 82 of the rear end of the strip 4, the subtractor, the counter 83, the digital-to-analog converter 84 and the repeater 85 with 5 one-quadrant output. The second, third and fourth inputs of the subtractive counter 83 are connected to the inputs 39-41 of the block 29, respectively, and the output of the repeater 85 is connected to its output 42. The block of synchronization of the stroke of the carriage 7 (Fig. 2) contains sequentially connected setpoint 86 of the position of the seam, subtractive counter 87, digital 15 analogue transducer 88, parabolic transducer 89, adder 90 with one-quadrant output, to the second input of which a frequency-analogue converter is connected 20 91. To the output of the counter 87, a zero-organ 92 o is connected. The reference source 93 is connected to the output 49 of the block via a control key 94. The second and third are connected to the inputs 43-46 of the block 25 inputs of the counter 87, the input of the frequency-analog converter 91 and the control input of the key 94, respectively. To the outputs 47 and 48 of the block connected to the outputs of the zero-body 92 and the adder 90 30 respectively. The seam flare unit 31 contains a serially connected counter 95, a comparison element 96, a trigger 97, an AND circuit 98, the output of which is 35 with an output 53 of the block, and a sealer 99 of movement 1p is connected to the second input of the comparison element 96. The first, second inputs of the counter 95 and the second input of the circuit 98 are connected to the inputs 50-52 of the block, respectively, the second input of the trigger 97 is also connected to the input 51 of the block, The command unit 32 (FIG. 2) consists of an inverter 100, to the output of which 45 the flip-flops 101 and 102 are connected, the one-shot 103, the AND 104 and 105 circuits are connected to the output of the trigger 101, And 106 and 107 are connected to the output of the trigger 102, Trigger 108 is connected in series with the AND circuit 109, to the output of which the one-shot 110 and the trigger 111 are connected, the output of the inverter 112 is connected to the second input of the circuit 109. To the output of the circuit 556 is connected the input of the trigger 113. The inverted output of the trigger J08 is connected to the second input of the circuit 196. To the inputs 54-62 block connect respectively, the second inputs of the circuits 105 and 106, the first input of the trigger 108, interconnected the input of the inverter 100 and the third input of the circuit 105, interconnected: the second inputs of the triggers 102, 108 and G13, the input of the inverter 112, the third input of the circuit 106 , the second input of the circuit 107, the second input of the trigger 101 and the second inputs of the circuit 104 and 2 and 107. The output of the circuit 104 is connected to the outputs 63, 72 and 75 of the block, output of the circuit 105 is connected to output 64 of the block, output 69 is connected to output 69 circuits 2 and 107. The outputs of the one-shot 103 are connected to the outputs 65 and 76 of the block. Connected to the outputs 66 and 73 of the block are connected between each other, the inverse output of the trigger 101 and the second input of the 1P trigger, the output of the one-vibrator 110 is connected to the output 67 of the block, the output of the circuit 2 And 107 is connected to the output 68 of the block, the output of the circuit 109 is connected to the output 70 of the block, the output of the trigger 113 is connected to the output 71 of the block , the output of the trigger 111 is connected to the output 74 of the block, the output 77 of the block is connected to its input 55. The system works as follows. When the rear end of the band 4 leaves the zone of the band 13, the signal at the inputs 58 and the inverter 100 of the command block 32 disappears, the output of the inverter 100 appears, which includes the triggers 101 and 102. At the same time, the one-shot 103 from the outputs 64 and 76 of the command block 32 enters the number l 1 into the counter 79 of the surge block 28 and the number Gd, and the counter 83 of the block 29 stops through their inputs 35 and 40 respectively. At the same time, the enable signals appear at the inputs of the circuits 104 and 107 of block 32, through which are on Outputs 63, 69, 72 and 75, as well as on the output 68 of the command block, The pulses of the sensors 6 and 11 are moved to move the rear end and the relative movement of the strip 4 and the carriage 7, respectively. The pulses of the sensor 6 are fed to the counting input + of the counter 79 of the surge unit 28 and to the counting input of the counter 83 of the block 29 of the stop, and to the input of the frequency-analog converter 91 of the block 30 of the synchronization of the stroke of the carriage 7. This increases the output signals of the counter 79 and the digital-analog converter 80 of the surge unit 28, the signal at the input and, accordingly, at the output of the speed control 24, increases, the drives 17 and the surge mechanisms 1 increase their speed in order to surge the front end of the strip 3 and form overlap lF with rear end of strip 4dl stitching. The output of the repeater 85 with the univariate output of the stop unit 29 is absent until the number f entered in the counter 83 is written off by the pulses of the sensor 6. Since Fg corresponds to the boundary movement of the rear end of the strip 4 to the stitching machine without joining and forming an overlap with front end 3, before decommissioning E, the speed of the mechanisms 5, the technology portion is not reduced. The speed of the mechanisms 5 begins to decrease by block 29 in the event that the rear end 4 moves from the sensor 13 to the distance, fn, without forming the required overlap for the seam with the value of eE with the front end of the strip 3 (Fig. 1). If overlap & is formed earlier than the back end 4 moves to the distance P, i.e. FJ FO, then the counter 83 of block 29 will be canceled by the signal of the null organ 81 of the surge block 28, and the effect on the reduction of the speed of the mechanisms 5 of the technological part is excluded (P is the current movement of the rear end of the strip 4 since it was removed from sensor 13). A zero signal at the output of the counter 79 of the surge unit 28 is formed when the equality B LE (one) where P is the current movement of the front end of lane 3, Equality (I) indicates that the movement of lanes 3 and 4 occurs with the maintenance of the overlap of the front and rear ends of a given value of L1. The latter is formed due to the speeding up of the speed of the surge gear 1 and strip 3 over the speed of gear 5 and strip 4. With 71 With the appearance in the zone of the sensor 13 of the front end of the strip 3, a signal appears at the input of the circuit 105 of block 32, the pulses of sensor 2 begin to flow to the counting input - reversible counter 79 and write down the number & Z entered in it from sensor 6, the current displacement r of the rear end of the strip 4. After writing off the number EE + E in the counter 79, the speed of the mechanisms 1 is equalized with the speed of the mechanisms 5. If for some reason, E "begins to exceed the sum of the numbers A + E, which indicates an increase overlap over preset led reasons & f, the number in the counter 79 and the output of the D / A converter 80 reverses the signs, and mechanisms 1 begin to slow down to reach  equality (1). As the overlap of the ends of lanes 3 and 4 to the flying stitching machine decreases, the number in the counter 87 of the block 30 of the carriage stroke synchronization 30 decreases, as the sensor 11 pulses the number L -V entered into the counter 87 into the preceding stitching cycle 1 .. -.-- P (Fig. 1) corresponding to the distance of the stitching line from the axis of the drive 8 stitching at the moment when the rear end of the band 4 enters from the sensor 13. When the number in the counter 87 decreases, the output signals of the digital-to-analog converter 88 and the parabolic converter 89 are reduced. The last one at the input of the adder 90 is compared with an output signal of a frequency analog converter 91 A Signals are supplied to the input of the adder 90 with opposite signs. As long as the signal from converter 89 exceeds the signal from converter 91, the output signal of adder 90 remains zero (adder 90 has a one-quadrant output). As soon as the signal from converter 89 becomes less than the signal from converter 91, which indicates that the weld line is approaching the stitching drive 8, the output signal of the adder 90 appears, and the carriage moving carriage 9 of the volatile stitching machine 7 accelerates Increasing the signal for acceleration of the carriage movement actuator 9 in such a way 191958 so that by the time of acceleration of the drive 9 to the speed synchronous with the speed of lanes 3 and 4, the equality j - k g - uE / 2, (2) to C where E is the current movement of the carriage 7, and (E, -f) is the relative movement of the strip 4 and the carriage 7, measured by the sensor I1 of the relative movement and writing off previously entered in the meter 87 of block 30 (with ). Parabolic converter 89 adjusts to equality. number & U,  - | 2 g, -f.) - (G .   1 --- where UU is the output signal of the parabolic converter 89, corresponding to the task of changing the speed of the carriage 9 for moving the carriage 7; a | - constant acceleration value of the drive 9. Equality (2) indicates the alignment of the line of stitching of the ends of lanes 3 and 4 with the axis of the drive 8 and the movement of the flying stitching machine and their synchronous movement, which allows to perform high-quality stitching of the bands. When equality is reached (2), the number in the counter 87 decreases to zero, the output of the parabolic converter 89, & U O becomes zero, and only the speed reference signal from the displacement sensor 6 is applied to the input of the adder 90 and block 21 Converter 91), corresponding to the speed of the bands 3 and 4, i.e. the carriage 7 and the stitching drive 8 move synchronously with the speed of the lanes 3 and 4, and the sensor II of the relative movement of the strip towards the carriage stops. This triggers the null-organ 92. The appearance of the signal of the null organ 92 of the block 30 of the synchronization of the carriage stroke at the input of the circuit 106 of the command block 32 triggers the trigger 113, since at the three other inputs Circuits AND 106 are resolving signals: from the output of the zero-organ 81 of the surge unit 28, from the output of the trigger 102, and from the inverse output of the trigger 108. The output signal of the trigger .113 through the output 71 of the command block 32 is fed to the input of the control unit 22 of the stitching drive 8, and the latter stitches the ends of lanes 3 and 4 on the fly. The end of the stitching operation is detected by the stitching sensor 10, the signal of which turns off the trigger 113 and the drive returns. 8 stitching to the original condition. At the same time, the trigger 108 is turned on by the signal of the stitching sensor 10, the signal at its inverse output disappears and the enabling signal is removed from the input of the AND 106 circuit. This eliminates the possibility of re-activating the stitching drive 8. After the latter returns to its original position, the signal of the stitching sensor 10 disappears, the output of the inverter 112 and, accordingly, at the output of the AND 109 circuit, a signal that triggers off the trigger 102 and the signals of the sensors 6 and 11 stop to the inputs of the carriage stroke synchronization unit 30. Simultaneously from the output of the circuit 109, a signal is supplied to the control input of the key 94 of the block 30, and the signal of the reference source 93 is fed to the input of the control block 21 - the carriage drive 9 returns the carriage 7 to the initial position, Also, the output of the one-shot 110 is pulsed a signal to enter into the counter 87 of the block 30 numbers (Е - Ы / 2), When the carriage 7 approaches the initial position, the sensor 12 is triggered, the signal of which turns off the trigger 108 of the block 32, turns off the key 94 of the block 30, and removes the signal of the reference source 93 from the input of the block 21 of the actuator control 9 of the carriage 7, The carriage 7 stops at the starting position. At this point, the cycle of the flying stitching machine ends. The flare drive 14 is turned on to increase the strength of the seam and improve the quality of the strip surface after the seam is moved to the 1D drive axis. Control of the movement of the seam to the axis of the drive 14 is carried out by the counter 95 of the flare unit 31, which counts the pulses of the displacement sensor 6 of the rear end of the strip 4 fed through the AND 104 schemes and the output 72 of the command unit 32 after the rear end 4 descends from the strip sensor 13. After accumulation in the counter 95 of the number Ер, corresponding to the movement of the seam to the axis of the drive 14, the comparison element 96 is triggered, the second input of which is supplied by the number p from the setpoint 99. This triggers the trigger 97 and when the trigger 111 of the command block 32 is turned on And 98 The signal enters the input of the control unit 23 of the flapper drive 14, which then turns on for the seam flare. When the drive 14 is turned on, the seam flare machine engages strip 3 and 4 and moves with it. Fixing the end of the flaring of the seam is carried out by the sensor 16, according to the signal of which the trigger 101 is turned off, respectively, the trigger 111 of the block 32 is turned off, also the trigger 97 of the block 31 and the counter 95 of the same block is extinguished. This removes the signal from the input of the control unit 23, the flaring actuators 14 and 15 return the seam flare machine to its original position. At this, the seam flare operation cycle of the seam ends, and the entire stitching cycle of the ends of the strips 3 and 4 ends. After finishing the processing of the strip 3 and the descent of its rear end from the strip sensor 13, the described cycle of stitching the ends of the strips repeats. Thus, due to the addition of the system by drives of the stitching carriage and seam expansion machine with control units, as well as carriage stroke synchronization and seam expansion units, strip and carriage relative movement sensor, source position sensor and seam flare sensors, the seam strength and surface quality of the sewn side are improved. on the run of the lanes in a continuous process without the use of loopback devices. 4i €) / 1DG "Ni 1PG v, Editor N. Gunko Compiled by T. Dobrovolskie Tehred L.Oleynik Proofreader V.Sinitska 1187/13 Circulation 518, Subscription  VNSHPI State Committee of the USSR for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Branch gash Patent, Uzhgorod, Proektna St., 4