CN104259218A - Hot rolling mill AGC system and rolling control method thereof - Google Patents
Hot rolling mill AGC system and rolling control method thereof Download PDFInfo
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- CN104259218A CN104259218A CN201410468281.3A CN201410468281A CN104259218A CN 104259218 A CN104259218 A CN 104259218A CN 201410468281 A CN201410468281 A CN 201410468281A CN 104259218 A CN104259218 A CN 104259218A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/48—Tension control; Compression control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
Abstract
The invention provides a hot rolling mill AGC system and a rolling control method thereof, belongs to the field of hot rolling mill AGC control and aims at solving the problem that at present, the hot rolling mill AGC system is low in control accuracy, insensitive in reaction and low in plate thickness control accuracy and influences constant pressure of a device. The model of a pressure sensor of the hot rolling mill AGC system is TIM0050302911201, and the pressure sensor is arranged in the oil cylinder of the hot rolling mill AGC system. The pressure sensor is the TIM0050302911201 pressure sensor modified according to set calibration parameters and is used for acquiring pressure in the oil cylinder of the hot rolling mill AGC system and feeding the pressure serving as a control parameter back to a hydraulic servo system of the hot rolling mill AGC system. The hot rolling mill AGC system is used in a hot rolling mill.
Description
Technical field
The invention belongs to hot-rolling mill AGC control field.
Background technology
Along with the quickening of aluminium alloy new product paces, the rapid lifting of exploitation kind class, varieties distribution implementation.The successful modification of hot-rolling mill AGC hydraulic system improves control accuracy, response speed etc., which determines final performance and the sheet material position commercially of sheet material. determine the development rate of high value added product.At present, hot-rolling mill AGC system pressure sensor spare part can not be guaranteed supply, and the thickness and precision of controlled rolling sheet material is poor, shows as: when not changing other accessory of hot-rolling mill AGC system, sensor degradation, can't buy spare part; The pressure sensor control accuracy of old model is poor, reacts insensitive, affects the requirement of equipment constant pressure, and sheet metal thickness control accuracy is low.
Summary of the invention
It is poor to the object of the invention is to solve current hot-rolling mill AGC system control accuracy, reacts insensitive, affects the requirement of equipment constant pressure, the problem that sheet metal thickness control accuracy is low, the invention provides a kind of hot-rolling mill AGC system and control method for rolling thereof.
Hot-rolling mill AGC system of the present invention,
The model of the pressure sensor of described hot-rolling mill AGC system is TIM0050302911201, and described pressure sensor is arranged in the oil cylinder of hot-rolling mill AGC system;
Described pressure sensor is the amended TIM0050302911201 pressure sensor of calibrating parameters according to setting;
Described pressure sensor is for gathering the in-oil cylinder pressure of hot-rolling mill AGC system, and the Hydrauservo System feeding back to hot-rolling mill AGC system is as controling parameter.
The Hydrauservo System of described hot-rolling mill AGC system comprises signal processing module, controller, servo amplifier, electrohydraulic servo valve, oil cylinder signal compensation module and change-over switch;
The Displacement Feedback signal output part of the displacement transducer of hot-rolling mill AGC system connects a feedback signal input terminal of change-over switch, the pressure feedback signal output of the pressure sensor of hot-rolling mill AGC system connects another feedback signal input terminal of change-over switch, the first feedback signal input terminal of the feedback signal output connection signal processing module of change-over switch;
Second feedback signal input terminal of the gap preset command signal output connection signal processing module of depress control system, the 3rd feedback signal input terminal of the Stress control command signal output connection signal processing module of depress control system,
Signal processing module is used for processing the signal that it receives, obtain shift differences, the difference signal input of the difference signal output connection control device of signal processing module, the amplifying signal output of controller connects the signal input part of servo amplifier, and the signal output part of servo amplifier connects the signal input part of electrohydraulic servo valve;
The oil-out of oil cylinder is communicated with the oil-in of hydraulic cylinder and forms oil circuit, and the pipeline that oil cylinder is connected with oil circuit is provided with electrohydraulic servo valve;
The signal transacting that oil cylinder signal compensation module is used for electrohydraulic servo valve gathers obtains press power.Obtain the Bounce distance of hot-rolling mill again divided by mill stiffness KM, the Bounce distance of acquisition is multiplied by the first feedback signal input terminal that the signal after penalty coefficient exports signal processing module to; Displacement transducer is for detecting the displacement of piston in hydraulic cylinder.
The control method for rolling of hot-rolling mill AGC system,
By the switching of change-over switch, the control method for rolling of described hot-rolling mill AGC system comprises compress control method and gap preset method,
When being switched to gap preset method by compress control method, using current roll gap as roll gap initial value, and nip pressures is adjusted, until reach target roll gap; When being switched to compress control method by gap preset method, using current pressure values as pressure initial value, and pressure is adjusted, until reach goal pressure;
Compress control method and gap preset method all adopt the set-point of S deformation to be rolled control.
Described control method for rolling is the rolling carrying out a certain rolling pass according to pass schedule.
Beneficial effect of the present invention is, AGC system of the present invention can poor, the different plate of same plate of control panel section product effectively poor.Realize milling train high-quality, high accuracy plate rolling.The success of system of the present invention comes into operation, significant to the raising of hot-rolling mill hydraulic pressing AGC pressure sensor spares provisioning and the automatic control accuracy of sheet metal thickness.The control method for rolling of present system, adopt advanced Hydraulic Servo Control Technology, form the Closed-loop pressure control system that pressure at both sides adjusts respectively, thus obtain response speed and higher control accuracy fast, the impact of load disturbance is controlled in minimum zone.
Accompanying drawing explanation
Fig. 1 is the principle schematic of oil cylinder of the present invention.
Fig. 2 is the principle schematic of the Hydrauservo System described in detailed description of the invention two.
Detailed description of the invention
Detailed description of the invention one: composition graphs 1 illustrates present embodiment, hot-rolling mill AGC system described in present embodiment, the model of the pressure sensor of described hot-rolling mill AGC system is TIM0050302911201, and described pressure sensor is arranged in the oil cylinder of hot-rolling mill AGC system;
Described pressure sensor is the amended TIM0050302911201 pressure sensor of calibrating parameters according to setting;
Described pressure sensor is for gathering the in-oil cylinder pressure of hot-rolling mill AGC system, and the Hydrauservo System feeding back to hot-rolling mill AGC system is as controling parameter.
Present embodiment re-starts parameter calibration design and the permanent roll gap realizing this milling train of positioning control and constant DP control, constant pressure and differential regulatory function by sensor remodeling, improves equipment working (machining) efficiency and rolling accuracy.
The equipment of present embodiment is composed as follows:
High-pressure section:
1) two constant pressure variable plunger pumps, a job, one is for subsequent use, and maximum pressure is 31.5Mpa; Rated operating pressure: 20-30Mpa;
Metered flow: 90-110L/min (single pump).
2) two alternating current generators: power: N=55KW; Rotating speed: n=1480 r/min.
3) accumulator volume, 2 × 63L+2 × 6.3L; Accumulator pressure 9-15Mpa.
4) electrohydraulic servo valve, model: MOOG72-S09KDFMJVBL; Maximum pressure: P=31.5Mpa; Metered flow: Q=95L/min (when pressure equals 7Mpa); Servo valve frequency range: >=50Hz.
5) depress oil cylinder: φ 850 × φ 700 × 25 (mm), range: 25mm; Speed: 3.6mm/s; Maximum pressure in oil cylinder: 19.385Mpa; Maximum rolling force: 2100T.
6) oil sources dustiness (being not less than) NAS16385 level
Low pressure cooling cyclic part:
1) pair vane pump, flow: 23L/min+100L/min; Pressure (balance) 0.5-1.5Mpa, drives alternating current generator, power: N=7.5KW; Rotating speed n=1440r/min.
2) accumulator, volume: 40L; Accumulator the blowing pressure: 0.3-1Mpa.Fuel tank, volume: 1000L.Working media, antiwear hydraulic oil YB-N46
#(L-HM46).Oil temperature, normal range of operation: 30-60 DEG C.Oil sources dustiness (being not less than) NAS1638.5 level.System filtering accuracy: 3 μ.
Pumping plant: have two constant pressure variable plunger pumps, a job, one is for subsequent use, and maximum pressure is 31.5Mpa; Rated operating pressure: 20-30Mpa metered flow: 90-110L/min, meanwhile, has a pair vane pump.Export the hydraulic oil of 25Mpa by constant pressure variable displacement pump, and the little pump of pair vane pump provides the equalizing pressure of 0.5-1.5Mpa for cylinder rod chamber, large discharge pump realizes the circulating cooling filtering function of oil.The output of constant pressure variable displacement pump is delivered to through check valve, filter, check valve, switch etc. and is considered station.The entrance of servo valve is delivered to through filter, check valve.Electromagnetism unloading overflow valve prevents pump discharge pressure superpressure, and at pump startup, carries out off-load during stopping.Two accumulators are used for eliminating the pulsation of pump output pressure, supplement large discharge during oil cylinder oil cylinder high-speed motion, stablize oil supply pressure.The Compositional balance oil supply systems such as the little pump of pair vane pump and overflow valve, reversal valve, accumulator, it provides stable equalizing pressure for cylinder rod chamber.The large pump of pair vane pump and cooler, duplex strainer composition independent loops cooling system, it can keep oil temperature and cleanliness factor in fuel tank to meet the requirements effectively.The oil return of system enters fuel tank through return filter.
Fuel tank is suspension, and the inlet port of pump is drawn at the bottom of case, has good oil absorptive function.Liquid level gauge is equipped with fuel tank, air filter and the device such as fuel outlet valve, sample valve.Be convenient to the maintenance of fuel tank and oily medium, ensure security of operation.
Filter station and servo valve group: the Filter Precision of filter station is 3 μ, can ensure that the cleanliness factor of the oil supplying servo valve reaches NAS more than 5 grades.Accumulator impacts in order to eliminate pipeline, and the peak flow of replenishment valve ensures that upstream pressure is stablized.Two pressure switches realize low-voltage variation and the alarm for high voltage function of upstream pressure respectively.Safety valve restriction oil cylinder maximum pressure, prevents roll-force from exceeding the upper limit.High pressure oil bottle, in order to supplementary oil cylinder volume, prevents oil cylinder volume too small, and it is only for constant DP control state.Pressure sensor is arranged on servo valve block, is used for detecting oil cylinder working-pressure.System before activation, after forwarding operating desk change-over switch to " manual position ", starts circulating cooling pump, oil temperature within the scope of 20-60 DEG C, otherwise will can not start pump, and present embodiment starts oil pump 20-60 DEG C time, according to operating sequence, the steady phenomenon without exception of system cloud gray model.
Pressure sensor old model in Hydraulic Pressing-down Cylinder in AGC: TLI 0050002111201, the sensor producer of current old model does not produce, market can't buy spare part, more importantly control accuracy is bad, for ensureing the gauge automatic control precision of spare part and raising sheet material, using its model of Novel pressure sensor instead is TIM0050302911201, but the structure of two kinds of sensors and all different with calibrating parameters, apply wherein in order to novel sensor can be made, improve to ensure to the structure of oil cylinder and the form fit of novel sensor, calibrating parameters resets.
Detailed description of the invention two: present embodiment is the further restriction to the hot-rolling mill AGC system described in detailed description of the invention one, the Hydrauservo System of described hot-rolling mill AGC system comprises signal processing module, controller, servo amplifier, electrohydraulic servo valve, oil cylinder signal compensation module and change-over switch;
The Displacement Feedback signal output part of the displacement transducer of hot-rolling mill AGC system connects a feedback signal input terminal of change-over switch, the pressure feedback signal output of the pressure sensor of hot-rolling mill AGC system connects another feedback signal input terminal of change-over switch, the first feedback signal input terminal of the feedback signal output connection signal processing module of change-over switch; Second feedback signal input terminal of the gap preset command signal output connection signal processing module of depress control system, the 3rd feedback signal input terminal of the Stress control command signal output connection signal processing module of depress control system,
Signal processing module is used for processing the signal that it receives, obtain shift differences, the difference signal input of the difference signal output connection control device of signal processing module, the amplifying signal output of controller connects the signal input part of servo amplifier, and the signal output part of servo amplifier connects the signal input part of electrohydraulic servo valve;
The oil-out of oil cylinder is communicated with the oil-in of hydraulic cylinder and forms oil circuit, and the pipeline that oil cylinder is connected with oil circuit is provided with electrohydraulic servo valve;
The signal transacting that oil cylinder signal compensation module is used for electrohydraulic servo valve gathers obtains press power.Obtain the Bounce distance of hot-rolling mill again divided by mill stiffness KM, the Bounce distance of acquisition is multiplied by the first feedback signal input terminal that the signal after penalty coefficient exports signal processing module to; Displacement transducer is for detecting the displacement of piston in hydraulic cylinder.
Hydrauservo System has position closed loop and pressure closed loop two backfeed loops.Realize location and level pressure two kinds of control modes.The conversion of working method is realized by K switch.
Be decided to be control mode: position backfeed loop is connected, pressure feedback is open circuit.Depress control system is to Hydrauservo System input roll gap control instruction Uz, it compares with output signal (oil cylinder position feedback signal) Uzf of displacement transducer, its difference e via controller carries out amplifying rear output voltage U, and it carries out power amplification through servo amplifier and exports the electric current proportional with U to the torque-motor of servo valve.Servo valve realizes conversion and the power amplification of the signal of telecommunication-hydraulic pressure signal, and flow, pressure that it is sent here oil sources by the size of input current control, and exports the flow Q with current in proportion
land pressure P
l.The depressing force produced through oil cylinder and pressing speed.The displacement of oil cylinder is detected by position sensor, and exports the signal Uzf proportional with displacement.As Uz-Uzf=0, e=0, so the input current I=0 of servo valve, now exports without flow, oil cylinder and stop motion.Like this, displacement Z (or roll gap open amount) the and instruction input Uz of oil cylinder is proportional.
Constant DP control mode: now, pressure feed back loop is connected, and position is fed back to open circuit.Pressure command signal Up compares formation error e with oil cylinder working-pressure feedback signal Upf, after via controller, servo amplifier, servo valve, forms load pressure PL in oil cylinder, when Upf and instruction Up is equal, oil cylinder working-pressure in change, does not stabilize to P value, and namely it be directly proportional to input instruction Up.
According to the requirement of rolling mill practice, change Up, can oil cylinder working-pressure be controlled, i.e. controlled rolling power Fz.
AGC system working method: on the basis of positioning control, is scaled roll-force by oil cylinder working-pressure signal Upf, and divided by mill stiffness KM, namely obtains the Bounce distance of milling train.This value is fed back to command input, compensates to realize spring, " permanent roll gap " rolling can be realized like this.The degree that Bounce distance compensates is regulated (C value is chosen between 0-1) by penalty coefficient C.
The hot-rolling mill AGC system of present embodiment improves the control accuracy of system, improves the machining accuracy of sheet material, does not affect the surface quality of aluminum alloy plate materials.
Detailed description of the invention three: present embodiment is the control method for rolling to the hot-rolling mill AGC system described in detailed description of the invention one, by the switching of change-over switch, the control method for rolling of described hot-rolling mill AGC system comprises compress control method and gap preset method
When being switched to gap preset method by compress control method, using current roll gap as roll gap initial value, and nip pressures is adjusted, until reach target roll gap; When being switched to compress control method by gap preset method, using current pressure values as pressure initial value, and pressure is adjusted, until reach goal pressure;
Compress control method and gap preset method all adopt the set-point of S deformation to be rolled control.
Be control roll gap (thickness of slab) and roll-force when milling train is rolled operation according to the function of this system, it has two kinds of control modes and positioning control mode and constant DP control mode.Positioning control mode need realize following functions: the setting of initial roll gap, roll gap Differential adjust, permanent roll gap AGC control; Constant DP control mode need realize following functions: realize both sides Differential adjust while constant pressure rolling, maintenance constant pressure.System composition, parameter and operation principle are as follows:
Screw-down is made up of two parts.Part I is housing screw, and its drive unit is direct current generator, and is provided with 1.07,10.7,21.4mm/s third speed, is respectively used to Long Distances, little stroke and close to stroke during target roll gap.This process is completed by Electro-pressing control system PLC open-loop control system.
The Part II of screw-down is pressure servoBcylinder, and design runlength is 25mm.For gap preset, Stress control and dynamic and static fine setting (i.e. the dynamic micro-adjustments of permanent roll gap and constant pressure rolling, the initial roll gap locking when static error compensation of positioning control and rolling).
Stress control is the heavy control device that hot-rolling mill obtains good profile, the quality of pressure control function depends on the control accuracy of roll-force, thus higher requirement is proposed to the dynamic and static state performance of press down system: the system of present embodiment adopts advanced Hydraulic Servo Control Technology, the action (lifting) of high performance servo valve difference control operation side (WS) and transmission side (DS) hydraulic cylinder, form the Closed-loop pressure control system that pressure at both sides adjusts respectively, thus obtain response speed and higher control accuracy fast, the impact of load disturbance is controlled in minimum zone.
In order to overcome the bad condition such as bad incoming profile and strip sideslip, on the basis adopting roller to correct, apply different pressure usually also will to fore side and transmission side, namely differential pressure is given.At this moment, the pressure of fore side or transmission side can be adjusted separately, thus in the different extension of strip both sides stroke, to reach the effect improved plate shape and correct sideslip tendency.
The pressure feedback signal of the system of present embodiment is taken from the pressure of hydraulic cylinder, because there is the influence factors such as bending roller force, roller system and bearing block deadweight, hydraulic coupling and roll-force are differentiated, in order to eliminate the impact of this difference on roll-force control accuracy, in control pressurer system, add just curved force compensating and deadweight correction two links.Actual rolling force value is sent to the display unit on operating desk, and the unit of display is t (ton).
When the object of hot-rolling mill gap preset is main: adjustment top working roll position makes roll gap reach desired value, thus makes strip obtain good longitudinal tolerance.
In addition, this system also has following function:
1) control transmission side oil cylinder and make the parallel lifting of two side shaft holders with fore side oil cylinder.2) monitor milling train gradient, carry out tilt boundary protection.
To achieve these goals, native system, except electric screw pressure, is also set up and is seen advanced position hydraulic servo control system, the closed loop location control system adjusted respectively by high performance servo valve.Depress oil cylinder is relative to the displacement of zero roll gap, have and be arranged on two in-oil cylinder displacement transducers and two displacement transducers be arranged on housing screw and detect, this measured value feeds back to roll gap and does closed-loop control to certain portions, thus meets quick response and the high accuracy control overflow of roll gap regulation.Actual gap values between rollers is sent to the display unit on operating desk, and the unit of display is mm.
The course of work of hot-rolling mill requires that it has pressure and gap preset function, and can only select a kind of control mode at synchronization, therefore, exists and mutually switch and seamlessly transit problem between pressure control subsystem and gap preset subsystem.
The control object of pressure control subsystem and gap preset subsystem is same hydraulic cylinder, and shares corresponding servo valve and servo amplifier.Change-over switch was provided with before servo amplifier, can by the input being outputted to servo amplifier of the output of pressure closed loop adjuster or roll gap closed-loop regulator, thus mutual switching thing achieve pressure and roll gap mode controls.
When being switched to gap preset by Stress control, using current roll gap as roll gap initial value, and control nip pressures and adjust according to certain rules, until reach target roll gap.When being switched to Stress control by gap preset, using current pressure values as pressure initial value, and controlled pressure adjusts according to certain rule, until reach goal pressure.
The Stress control of native system and gap preset all adopt the given adjuster of a S shape to be transformed into a set-point by S deformation, the acceleration of load and servo valve action is limited, thus reach the object of " soft start " and " soft landing ", prevent the generation of the accidents such as plant equipment collision and hydraulic shock ripple destruction.
Detailed description of the invention four: present embodiment is the further restriction of the control method for rolling to the hot-rolling mill AGC system described in detailed description of the invention one, described control method for rolling is the rolling carrying out a certain rolling pass according to pass schedule.
This hot-rolling mill is single chassis reciprocating rolling mill, and according to rolling mill practice, slab will adopt multi-pass rolling, and the parameters such as concrete rolling pass, draught per pass all will pre-determine.Generally speaking, hot-rolling mill adopts gap preset rolling mode, sometimes in order to improve the plate shape condition of finished product strip, require in the end a time or two passes time adopt pressure rolling control mode.
Conveniently operate, operating desk is provided with an operation computer installation, and multiple pass schedules stored in computer, operator can according to supplied materials situation and concrete rolling mill practice requirement, recalling corresponding pass schedule makes control system automatically control draught per pass by this table, or realizes Stress control rolling mill practice.Also can manually fill in new pass schedule, and indication mechanism is by this table automatic operation.Certainly, new pass schedule also can be input in pass schedule storehouse, to call from now on.
The operation of rolling is decomposed:
A, initial roll gap lock: former passage, and by under Electro-pressing screw automatic pressing, until after roll gap reaches the setting value of this passage, stinging material and the operation of rolling, housing screw and hydraulic press down system system all carry out locking position.
B, gap preset rolling: according to pass schedule, in a certain rolling pass, under housing screw automatic pressing, until roll gap reaches the setting value of this passage, then carry out static error compensation by hydraulic system.After rolled piece is nipped, hydraulic system regulates automatically, keeps roll gap constant.
C, Stress control rolling: according to pass schedule, in a certain rolling pass, under housing screw automatic pressing, until roll gap reaches the setting value of this passage, then carry out static error compensation by hydraulic system.After rolled piece is nipped, hydraulic system transfers Stress control to automatically, keeps roll-force constant.
D, whipping process: when Stress control rolling or gap preset rolling, once strip afterbody is by milling train, then roll-force rapid drawdown is zero, now system keeps roll gap at that time constant, then according to pass schedule, automatically the setting value of roll gap regulation to lower a time, reverse rolling is treated.
Claims (4)
1. hot-rolling mill AGC system, is characterized in that, the model of the pressure sensor of described hot-rolling mill AGC system is TIM0050302911201, and described pressure sensor is arranged in the oil cylinder of hot-rolling mill AGC system; Described pressure sensor is the amended TIM0050302911201 pressure sensor of calibrating parameters according to setting; Described pressure sensor is for gathering the in-oil cylinder pressure of hot-rolling mill AGC system, and the Hydrauservo System feeding back to hot-rolling mill AGC system is as controling parameter.
2. hot-rolling mill AGC system according to claim 1, is characterized in that, the Hydrauservo System of described hot-rolling mill AGC system comprises signal processing module, controller, servo amplifier, electrohydraulic servo valve, oil cylinder signal compensation module and change-over switch;
The Displacement Feedback signal output part of the displacement transducer of hot-rolling mill AGC system connects a feedback signal input terminal of change-over switch, the pressure feedback signal output of the pressure sensor of hot-rolling mill AGC system connects another feedback signal input terminal of change-over switch, the first feedback signal input terminal of the feedback signal output connection signal processing module of change-over switch;
Second feedback signal input terminal of the gap preset command signal output connection signal processing module of depress control system, the 3rd feedback signal input terminal of the Stress control command signal output connection signal processing module of depress control system,
Signal processing module is used for processing the signal that it receives, obtain shift differences, the difference signal input of the difference signal output connection control device of signal processing module, the amplifying signal output of controller connects the signal input part of servo amplifier, and the signal output part of servo amplifier connects the signal input part of electrohydraulic servo valve;
The oil-out of oil cylinder is communicated with the oil-in of hydraulic cylinder and forms oil circuit, and the pipeline that oil cylinder is connected with oil circuit is provided with electrohydraulic servo valve;
The signal transacting that oil cylinder signal compensation module is used for electrohydraulic servo valve gathers obtains press power, obtain the Bounce distance of hot-rolling mill again divided by mill stiffness KM, the Bounce distance of acquisition is multiplied by the first feedback signal input terminal that the signal after penalty coefficient exports signal processing module to; Displacement transducer is for detecting the displacement of piston in hydraulic cylinder.
3. the control method for rolling of hot-rolling mill AGC system according to claim 1, is characterized in that,
By the switching of change-over switch, the control method for rolling of described hot-rolling mill AGC system comprises compress control method and gap preset method,
When being switched to gap preset method by compress control method, using current roll gap as roll gap initial value, and nip pressures is adjusted, until reach target roll gap;
When being switched to compress control method by gap preset method, using current pressure values as pressure initial value, and pressure is adjusted, until reach goal pressure;
Compress control method and gap preset method all adopt the set-point of S deformation to be rolled control.
4. the control method for rolling of hot-rolling mill AGC system according to claim 3, is characterized in that, described control method for rolling is the rolling carrying out a certain rolling pass according to pass schedule.
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| CN109108093A (en) * | 2018-08-03 | 2019-01-01 | 东北轻合金有限责任公司 | 3950mm hot mill rolling control system and method |
| CN109158430A (en) * | 2018-07-16 | 2019-01-08 | 太原理工大学 | A kind of corrugation rolls rolling mill hydraulic servo-system position compensation control method |
| CN110328234A (en) * | 2019-06-26 | 2019-10-15 | 山西太钢不锈钢精密带钢有限公司 | The manufacturing method of raw material for strip in razor-thin rolling and its raw material of manufacture |
| CN112974539A (en) * | 2021-02-08 | 2021-06-18 | 太原科技大学 | Intelligent pre-stressing device and method for large axle wedge cross rolling mill for rail transit |
| CN113617855A (en) * | 2021-07-16 | 2021-11-09 | 太原科技大学 | Rolling mill control method and system |
| CN114147073A (en) * | 2021-11-03 | 2022-03-08 | 天津市新宇彩板有限公司 | Zero calibration control method and system for oil pressure sensor |
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