CS199173B1 - Connexion of the programmer for optimum starting and stopage of the rolling train - Google Patents

Description

The invention relates to a programmer for optimum starting and stopping of a rolling mill. '. . . ·. · ·? · '\ · ·. , '.- Λ

To control the starting and stopping of continuous rolling lines or lines, eee uses programmers which control the starting and stopping speed of the track. The start and stop slope is dependent on the line technology and at the same time it is necessary to maintain a preselected speed ratio of individual stools or track aggregates when starting and stopping. There were no disturbances on the track due to the tearing of the dog. These drawbacks are eliminated by the wiring of a programmer for optimum start and stop of the rolling mill consisting of gearboxes, non-linear Elephants, summing Sien, switching block, integrator, power amplifier, feedback block, potenoiometer A and diodes according to the invention. wiring is an epojue through its associated transfer block by the first input of the corresponding non-linear member. The control input of each non-linear member is connected only by the corresponding wiring control terminal. The output of each actuator is connected via the associated positive diode β through the first summation limiting input and the cathode associated negative diode.

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All negative diode anodes are connected to the other · summing Sieno input limiting input • The summing member output is connected to the switching input's direct input. The input fields of the summation are connected via the wiring terminals and the corresponding inputs of the evaluation block. The output of the evaluation block is connected to the second input of the switching block. Switching block output is connected to the integrator output. · The integrator output is connected to the power amplifier input. The excavation amplifier outlet is connected with one outlet of the setting potenoiometer. The slider of the setting potentiometer is connected with the corresponding output terminal of the wiring. The output of the power amplifier is further coupled to the first input of the feedback block, the phased output of the feedback block is connected to the control potenoi meter. The returning block output is coupled to the limiting veto of the summation member.

The advantage of this connection is that it sets the optimum acceleration and stopping speed of the track with respect to the limit values of the important technological parameters of the track, such as * torque load of motors, dog thrust.

The connection is simple and reliable and can be realized from available components.

An example of a wiring according to the invention is shown in the block diagram in the attached drawing. The individual wiring blocks can be characterized as follows:

The transfer blocks 2 ^ to 2 ^ are interconnected. Each consists of operational amplifiers, diodes, transistors and transformers. It serves for galvanic isolation, amplification and adjustment of input signals for processing in other circuits.

All non-linear members 5 to 5 _µ are the same. These are operational amplifiers with non-linear controlled feedback. It is used to control insensitivity in the zero area by a lower signal. ¹ ·. . ,. ^'1 Positive diodes 8 ^ to 8 ^ 9 & apos and negative diodes 9 to _R jeou conventional silicon diode. Used to rectify the output voltages of non-linear members up to 5 & ·

Summing element 12 J · proportional amplifier with proportional feedback and with a number of input resistors. They are used to sum up all input signals.

The evaluation block 11 is formed from an opamp of the transistors, diodes. and resistance. It is used to control the switching block 16, depending on the signals on the input inputs 11 to 11 _{of the} wiring.

The switching block J4 is formed of transistors, operational amplifiers and resistors. It serves to switch the output voltages of the summation member 12 to the input of the integrator lg.

The integrator 12 is formed from field-controlled transistors, integrating feedback opamps, resistors and capacitors. It serves to integrate input signal and analog memory.

Power amplifier 12 eo consists of operational amplifier, transistors and resistors. It serves for power amplification of output voltage of integrator 15.

The feedback block 12 is formed from an opamp and proportional feedback, resistors and diodes.

It serves as integrator feedback 1 ^.

The control potentiometer 18 is a conventional potentiometer and is used to enter the maximum voltage of the integrator 15.

Control potentiometers 19j_ to 19 _p and potentiometers are commonly used to adjust the speed ratio of roll stands.

Procurement terminals 11- ^ to _{II, n} may be any number, in that particular case, only two are shown. One to stop, the other to start,

Connection is as follows:

Each input terminal ^ 1, i ₂ through L _n wiring is connected through its associated transfer unit;

2 ^ to 2 _n with a first input of up to 6 _{β of the} corresponding non-linear member up to 5 _n · The control input 2 $ ^ to 26 · ^ of each non-linear member up to £ _n is connected to the corresponding control eyelet 25 ^ to 2 $ _n wiring. Output up to each actuator up to j? _n is connected via the assigned positive diode up to the first limiting input 10 ^ of the summation member 10 and secondly with the cathode associated negative diodes up to 2 _η · The anode of the negative diodes to 2a is connected to the second limiting input ΙΟς, summation 10. - adder 10 is connected to a first input of block 14. input 14spínacího Joji inputs to adder 10j _n and 10 are connected both with the specification terminal 11 to _II-n connections and, secondly, to the corresponding inputs l ^ n ^ 13 EŽ evaluation using L ^ . The output 13j of the evaluation block 13 is connected 8 by the second input 14 _{2 of the} switching block 14. The output 142 of the switching block 14 is connected to the input 15 of the integrator 15. The output 15 _{2 of the} integrator 15 is connected to the input 16 of the power amplifier 16. is connected to one outlet of the adjusting potentiometer 22 to 22 _n . the runner is connected to the output terminal corresponding 22- to _22-n and further connections 16 ₂ output power amplifier 16 connected to first input of the feedback block of the control input. 172 is coupled to the control potentiometer 18 and the output 17j of the feedback block 17 is coupled to the limiting input 10g of the summation member 10. '

The wiring works as follows:

The line start command comes from the first input terminal 11 to the first input input of the summation member 30 and simultaneously to the first input input 13 of the evaluation block 13.

In the summation member 10e, additional signals are added to this signal at all other inputs of the summation member 10, which in this case are zero. The output voltage of adder Io leads and £ switching unit which is switched when the signal at the terminals of the specifications L II to II involvement _n is non-zero input to the integrator 1 ^ 15th .mu.g integrator integrates this voltage with a speed proportional to the voltage at the output JLOg IQ adder until the voltage at the output of the power amplifier ₂ .mu.g 16 _f in which amplifies the output signal of the integrator 1 £, less than the voltage on the wiper of the potentiometer 18. Then, control is output block 17j feedback ϋ zero signal je- If the output voltage of the power amplifier 16 is greater than the voltage at the slider of the control potentiometer 18, 3.7 voltages are generated at the output block XJj of the feedback block 10 which is applied to the feedback input 10j of the summation member 10 as a strong negative feedback. , which orders the start of the line in such a way that: e voltage on the output of the integrator ₂ XJ X5, stopped increasing and maintained at a value proportional to the voltage on the control beige poteneioaetru i§. In a similar way, the circuit described above operates when the command is stopped to the last input terminal J, _n . -Tom In the case of voltage drops 15 intesrátoru at speeds proportional to the voltage at the last tender svorceAl _p. As soon as the voltage at the output _{1-2 of the} power amplifier χ6 drops to zero, a feedback feedback block XI is applied which does not allow the polarity of the output 16o of the power amplifier 16 to be changed. Power amplifier. 16 Power Supply extender poteneiometry W to 19 _m (in the drawing jeou drawn three) of their runners are set desired speed of the rolls of individual stands of the rolling mill * It allows to change the speeds of the individual stands, while maintaining a constant ratio speed stands when starting and stopping the whole distance, speed integration of the integrator 15 and thus the rate of starting and stopping the track depends on the output voltage ha 10 g Siena adder 10 and hence the voltages at the respective terminals 11 · ^ _n or II. from which the voltage at the limiters • X inputs χθ _χ are subtracted. 1O adder JO _NO. Input terminals An ^{aí signals} from a physical quantity which varies with the starting and stopping when tracks are for example, the torque load - base currents of the motors driving the cylinder moves between the stands, the pressures in the faeces. Each signal is then watered through the appropriate conversion block up to 2 _n > which modifies the signal - / amplifies and sometimes galvanically separated, to input up to the relevant non-linear member áž 5 _n , whose insensitivity range around zero is controlled by the signal applied to the fused control terminal 25 ^ to 25 _p . This signal may be proportional, for example, to the desired thrust, pressure and current. At the output of the nonlinear element to Zq .beta. _n jo voltage only when the input voltage at the respective input svoroa X ^ X _n to the larger ones than the respective set zone nonlinearities of the nonlinear element of £ zeros.

In this case, the voltages from the output Ij to the nonlinear Si e are sieved e by distinguishing the polarities e by the parallel diode sum. The highest positive voltage ee then applies to the first limiting vetup and the greatest negative voltage is applied to the second limiting input. lg _{2 of the} sum term χθ. This voltage increases, or retards start - stopping the track until the output is 1 ^ to J _n nonlinear elephants EŽ voltage, i.e., if the size of a physical quantity greater than or less than the predetermined deadband příolužněho nonlinear Elephant to this This is automatically controlled by the steepness of the starting and stopping of the line depending on the magnitude of the physical quantities applied to the input terminal Xj to X _n, by adding, subtracting or subtracting signals to the input ele- ments lp. 113 to LL _n, thereby controlling the speed 'lntogreoo integrator 1%. For example, when starting and stopping the programmer, the programmer controls the steepness of the starting in such a way that the magnitude of the stool driving motor currents does not reach the current limit. * Then the engine speed would decrease and stool speed would not be maintained stools.

. The invention is applicable to a wide variety of line types, particularly suitable for controlling the starting of continuous rolling mills, such as four-table and five-table tandem.

Claims (1)

Programmer wiring for optimal start and stop of the rolling mill consisting of gearboxes, non-linear members, evaluation block, integrator, power amplifier, feedback block, potentiometers, diodes, characterized in that each input terminal (1 · ^, lg to l _ft ) the wiring is connected via its associated transfer block (2 · ^ to 2 _n ) and the first input of the corresponding non-linear member (5 ^ to 5 _a ) whose control input (26 · ^ to 26 _n ) is connected β by the corresponding control terminal (25 · ^ To 25 _n ) the wiring and output (7χ to 7 _n ) of each actuator (5 _χ to 5 _n ). It is connected via an associated positive diode (8 ^ to θ _η > to the first limiting input (10 ^) of the summation member ( 10) and the cathode of the diode assigned to negative (9j to 9 _n) whose anode is spojenasdruhým omezevacím inlet (log) of the adder (10) whose output (10 g) is connected to the first input (Lei) switching block ( 14) and an input port (10 · ^ to IQjq) of the adder (10) are associated with the procurement terminals (11 to U ^ _n) engaged aa corresponding inputs (13 _13th to 13 _ln ) of the evaluation block (13), whose output (13j) is connected β by the second input (lig) of the switching block (14), whose output (14 is connected to the input (15 ^) of the integrator (15), whose output (15g) is connected to the input (16 ^) of the power amplifier (16) whose output (Í6g) is connected to one terminal of the adjusting potenolbmetru (19 ^ to 19 _n), the runner is connected to a corresponding output terminal <22 ^ to 22 _Q) involvement and further, the output (16g) of the power amplifier (16) is coupled to the first input (17 ^) of the feedback block (17), whose control input (17g) is coupled to the run potentiometer (18) and the output (17y) of the feedback block (17). 1) is connected to the limit input (10) of the summation member (10).