CN108971236A - A kind of draught pressure forecast method of hot continuous rolling composite strip - Google Patents

A kind of draught pressure forecast method of hot continuous rolling composite strip Download PDF

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Publication number
CN108971236A
CN108971236A CN201710397713.XA CN201710397713A CN108971236A CN 108971236 A CN108971236 A CN 108971236A CN 201710397713 A CN201710397713 A CN 201710397713A CN 108971236 A CN108971236 A CN 108971236A
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CN
China
Prior art keywords
composite
property coefficient
supplied materials
process controller
coefficient
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Pending
Application number
CN201710397713.XA
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Chinese (zh)
Inventor
张志超
张华伟
吴真权
单旭沂
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Baoshan Iron and Steel Co Ltd
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Baoshan Iron and Steel Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Baoshan Iron and Steel Co Ltd filed Critical Baoshan Iron and Steel Co Ltd
Priority to CN201710397713.XA priority Critical patent/CN108971236A/en
Publication of CN108971236A publication Critical patent/CN108971236A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B37/00Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/58Roll-force control; Roll-gap control
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B38/00Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/08Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-force
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B2201/00Special rolling modes
    • B21B2201/06Thermomechanical rolling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B2265/00Forming parameters
    • B21B2265/12Rolling load or rolling pressure; roll force

Abstract

A kind of draught pressure forecast method of hot continuous rolling composite strip receives supplied materials information by process controller, and judges the material of current supplied materials;According to the material property of the supplied materials after judgement, the roll-force based on single plate and the roll-force based on composite plate are established, to establish a kind of draught pressure forecast method that the hot continuous rolling composite production process suitable for multilayer unlike material controls.

Description

A kind of draught pressure forecast method of hot continuous rolling composite strip
Technical field
The invention belongs to technical field of steel rolling, and in particular to a kind of draught pressure forecast side of hot continuous rolling composite strip Method.
Background technique
As shown in Figure 1, hot rolling technology process substantially has heating, roughing, finish rolling, batches, transports, the processes such as finishing.First According to rolling scaduled, slab is packed into walking beam furnace 11 according to sequence.Slab is heated to the target temperature of process stipulation After, slab is successively extracted out by pumping steel machine, is placed on charging roller table, then hot slab is transported to roughing mills.Thick Milling train group, slab initially enter No. 1 De-scaling box 12 and carry out de-scaling.It is re-fed into two roller reversible milling train 13 and 14 of E1, R1, rolls 1- 3 passages.Then slab enters E2, R2 four-high reversing mill 15 and 16, rolls 3-7 passage.Later again by being disposed close to E3, R3 and E4, the irreversible milling train tandem rolling 17,18,19,110 of R4.The slab rolling of 200-250mm is 38-60mm's by roughing area Delay table after intermediate base, by the measurement of the outlet R4 width gage 111, before being passed to mm finishing mill unit.Intermediate base enters essence After milling train group, first passes around four link type flying shear 112 and cut off its part end to end, carry out de-scaling subsequently into No. 2 De-scaling boxs 113, using S1 edger roll 114 and 20 tandem rolling of finish rolling F1-F7 rack at the finished strip of 1.2-25.4mm thickness.Strip goes out F7 machine After frame, the measurement again by instruments such as calibrator detection systems 4 is needed, reaches the heat output roller way for batching unit.It is defeated in heat Pass through section cooling equipment 115 on roller-way out, its temperature is cooled to defined temperature.The outlet of section cooling is provided with volume Width gage is taken, after carrying out last time width measurement to strip after cooling, coiling machine 5 is admitted to and coils into coil of strip.
Mm finishing mill unit
Hot fine rolling rack is the made-up belt for shutting out roughing mill, rolls into any surface finish, size specification, and performance meets, plate shape Good finished strip.In finish rolling production process, made-up belt will first be cut off, back-end crop, this is to guarantee threading with steel is thrown and be The stability of rolling, while dephosphorization system is additionally provided in rack, guide and guards, looper, roll cooling water collector, dust-extraction unit Etc. equipment.
Draught pressure forecast
Hot-strip produces in the operation of rolling, due to finished product thickness to be guaranteed, it is necessary to carry out to each rack roll gap presetting To guarantee that thickness is consistent with target thickness after strip goes out.Draught pressure forecast is directly used in roll gap setting, and directly determines that roll gap is set Fixed accuracy.Under normal circumstances, in the case where other conditions are constant, roll-force size depends on the resistance of deformation of material. Model guarantees that the accuracy of setting, the deviation of the resistance of deformation of material pass through material property related coefficient by self study mode Self study compensation is carried out, can be generally set in reasonable range by Model Self-Learning roll-force.
Prior art Rolling Force for Hot Strip Rolling forecasting procedure
The calculating of general hot continuous rolling power is as follows:
Force [i]=α × k × red [i] × hardness
In formula:
Force [i]: the roll-force of the i-th rack;
α: material property related coefficient;
K: other related coefficients;
Red [i]: i-th rack reduction ratio;
Hardness: material flattens hardness, (with temperature, hardness group, inlet temperature, tension is related).
When rolling stock changes, that directly affect its draught pressure forecast precision is exactly α, can be passed through under normal circumstances α is adjusted to meet its draught pressure forecast precision.
Problem of the existing technology:
1. hot-continuous-rolling strip steel rolling force setup, can not be accurate to the resistance of deformation setting of composite just for single material Setting.
2. draught pressure forecast deviation will lead to greatly strip dimension overproof, since rack second flow matches deviation meeting serious greatly Lead to steel scrap in rack.
Application No. is the patent application of " 200910227864.6 ", a kind of DC mill milling pressure, roll gap pressure are disclosed Forecasting procedure.Method includes the following steps: collecting the device parameter and technological parameter of practical DC milling train;By roller system and rolled piece Along body of roll discrete--direction;Assuming that initial roll gap shape, sets draught pressure, roll gap pressure is set, calculate roll gap shape and is sentenced It is disconnected whether to restrain, it does not restrain and goes to setting that step of draught pressure, verify the dynamic balance condition of working roll.
Application No. is the patent applications of " 201611239146.7 ", and it is pre- to disclose a kind of slab rough rolling step roll-force Reporting method, which comprises in the cocked hat in π plane, radius and the track Tresca are surrendered by Mises criterion Apothem constructs an apothem linear combination yield criterion, and specific plastic power when material yield is calculated according to flow rule, Heavy plate rolling velocity field is determined with the overall weight method of average, solves internal modification function using specific plastic power and mill speed field Rate, friction horsepower, shearing power and general power;Based on rolling general power extreme value component slab rough rolling step prediction of rolling force mould Type, and according to prediction of rolling force model prediction slab rough rolling step roll-force.
Application No. is the patent applications of " 201010137162.1 ", disclose a kind of hot-rolling mill secondary control rolling force forecast Method, this method are suitable for the rolling of various object supplied materials and various regulations, using the historical data of the operation of rolling, forecast subsequent The roll-force of the every a time of supplied materials.The rolling of regulation of the same race for same material, rolling of the forecasting procedure based on front band It as a result is that the deviation of the target outlet thickness of band extreme trace time actual exit thickness and setting is designed.It will be thick poor It is sequentially allocated in each passage by a certain ancestral's weight coefficient, determines the adjustment amount of upper roll-force per pass, then by adjusting institute There is the draught pressure forecast value of passage to eliminate deviation, after limited times adjusts, provides reasonable draught pressure forecast value.
Summary of the invention
In order to solve the above problem, the present invention provides a kind of draught pressure forecast method of hot continuous rolling composite strip, By the characteristic and thickness accounting of different composite material, carry out being assigned to one material property coefficient of model by weight, be used into Row draught pressure forecast, so that the hot continuous rolling for being suitable for unlike material composite rolling produces.Its technical solution is specific as follows:
A kind of draught pressure forecast method of hot continuous rolling composite strip, it is characterised in that include the following steps:
S1: process controller receives supplied materials information, and judges the material of current supplied materials;
S2: if the material of current supplied materials is single plate, S3 is entered step;
If the material of current supplied materials is composite plate, S4 is entered step;
S3: process controller reads material correlated inheritance coefficient table, and is assigned according to the numerical value of reading to current supplied materials Value;Subsequently into step S5;
S4: process controller calculates composite material property coefficient, and is completed according to evaluation to current supplied materials material The setting for expecting characteristic coefficient, subsequently into step S5;
S5: process controller completes the calculating and assignment of other related coefficients, and completes after material hardness calculates, to rolling Power processed is calculated, and calculated roll-force is issued to basic automatization computer.
A kind of draught pressure forecast method of hot continuous rolling composite strip according to the present invention, it is characterised in that:
In step S4, process controller calculates composite material property coefficient, specifically comprises the following steps:
S41: process controller retrieves each layer unlike material material property coefficient;
S42: process controller calculates each layer unlike material thickness accounting;
S43: it is accounted for according to each layer unlike material material property coefficient and calculated each layer unlike material thickness that retrieve Than,
Calculate composite material property coefficient.
A kind of draught pressure forecast method of hot continuous rolling composite strip according to the present invention, it is characterised in that:
In step S43, the composite material property coefficient is according to different composite material, by the way of weighted sum
It is given, specifically:
α=α1h12h2+...+αnhn
Wherein,
α: the material property coefficient of composite;
α1: the material property coefficient of material 1;
α2: the material property coefficient of material 2;
h1: the thickness accounting weight coefficient of material 1;
h2: the thickness accounting weight coefficient of material 2.
A kind of draught pressure forecast method of hot continuous rolling composite strip of the invention, passes through the characteristic of different composite material With thickness accounting, carry out being assigned to one material property coefficient of model being applicable to more by weight for carrying out draught pressure forecast The hot continuous rolling composite production process control of layer unlike material;By accurately setting composite hot continuous rolling finish rolling roll-force, By deviation control within positive and negative 5%;By the accurate setting of finish rolling roll-force, thickness hit rate is improved, rack is reduced Between due to second flow mismatch caused by rise set, draw steel phenomenon, production stability promoted.
Detailed description of the invention
Fig. 1 is hot rolling technology flow chart;
Fig. 2 is tube rolling simulation process schematic of the invention;
Fig. 3 is the calculating process schematic diagram of " composite material property coefficient " in the present invention.
In figure, 11 be heating furnace;12 be No. 1 De-scaling box;13 be E1 edger roll;14 be R1 milling train;15 be E2 edger roll;16 be R2 Milling train;17 be E3 edger roll;18 be R3 milling train;19 be E4 edger roll;110 be R4 milling train;111 be width gage after R4;112 be flying shear; 113 be No. 2 De-scaling boxs;114 be finish rolling S1 edger roll;20 be finish rolling milling train;4 be calibrator detection system;115 be section cooling;5 For coiling machine.
Specific embodiment
In the following, the rolling to a kind of hot continuous rolling composite strip of the invention according to specification drawings and specific embodiments Force forecasting method processed is further described in detail.
A kind of draught pressure forecast method of hot continuous rolling composite strip as shown in Figure 2, includes the following steps:
S1: process controller receives supplied materials information, and judges the material of current supplied materials;
S2: if the material of current supplied materials is single plate, S3 is entered step;
If the material of current supplied materials is composite plate, S4 is entered step;
S3: process controller reads material correlated inheritance coefficient table, and is assigned according to the numerical value of reading to current supplied materials Value;Subsequently into step S5;
S4: process controller calculates composite material property coefficient, and is completed according to evaluation to current supplied materials material The setting for expecting characteristic coefficient, subsequently into step S5;
S5: process controller completes the calculating and assignment of other related coefficients, and completes after material hardness calculates, to rolling Power processed is calculated, and calculated roll-force is issued to basic automatization computer.
In step S4, process controller calculates composite material property coefficient, specifically comprises the following steps (such as Fig. 3 institute Show):
S41: process controller retrieves each layer unlike material material property coefficient;
S42: process controller calculates each layer unlike material thickness accounting;
S43: it is accounted for according to each layer unlike material material property coefficient and calculated each layer unlike material thickness that retrieve Than calculating composite material property coefficient.
In step S43, the composite material property coefficient is according to different composite material, by the way of weighted sum It is given, specifically:
α=α1h12h2+...+αnhn
Wherein,
α: the material property coefficient of composite;
α1: the material property coefficient of material 1;
α2: the material property coefficient of material 2;
h1: the thickness accounting weight coefficient of material 1;
h2: the thickness accounting weight coefficient of material 2.
Embodiment
Double layer composite board design parameter based on the technical program is as follows:
Three-layer composite board design parameter based on the technical program is as follows:
A kind of draught pressure forecast method of hot continuous rolling composite strip of the invention, passes through the characteristic of different composite material With thickness accounting, carrying out being assigned to one material property coefficient of model by weight can be tried out for carrying out draught pressure forecast in more The hot continuous rolling composite production process control of layer unlike material;By accurately setting composite hot continuous rolling finish rolling roll-force, By deviation control within positive and negative 5%;By the accurate setting of finish rolling roll-force, thickness hit rate is improved, rack is reduced Between due to second flow mismatch caused by rise set, draw steel phenomenon, production stability promoted.

Claims (3)

1. a kind of draught pressure forecast method of hot continuous rolling composite strip, it is characterised in that include the following steps:
S1: process controller receives supplied materials information, and judges the material of current supplied materials;
S2: if the material of current supplied materials is single plate, S3 is entered step;
If the material of current supplied materials is composite plate, S4 is entered step;
S3: process controller reads material correlated inheritance coefficient table, and carries out assignment to current supplied materials according to the numerical value of reading;So After enter step S5;
S4: process controller calculates composite material property coefficient, and is completed according to evaluation to current supplied materials material spy The setting of property coefficient, subsequently into step S5;
S5: process controller complete other related coefficients calculating and assignment, and complete material hardness calculate after, to roll-force It is calculated, and calculated roll-force is issued to basic automatization computer.
2. a kind of draught pressure forecast method of hot continuous rolling composite strip according to claim 1, it is characterised in that:
In step S4, process controller calculates composite material property coefficient, specifically comprises the following steps:
S41: process controller retrieves each layer unlike material material property coefficient;
S42: process controller calculates each layer unlike material thickness accounting;
S43: according to each layer unlike material material property coefficient and calculated each layer unlike material thickness accounting retrieved,
Calculate composite material property coefficient.
3. a kind of draught pressure forecast method of hot continuous rolling composite strip according to claim 2, it is characterised in that:
In step S43, the composite material property coefficient is given by the way of weighted sum according to different composite material It is fixed, specifically:
α=α1h12h2+...+αnhn
Wherein,
α: the material property coefficient of composite;
α1: the material property coefficient of material 1;
α2: the material property coefficient of material 2;
h1: the thickness accounting weight coefficient of material 1;
h2: the thickness accounting weight coefficient of material 2.
CN201710397713.XA 2017-05-31 2017-05-31 A kind of draught pressure forecast method of hot continuous rolling composite strip Pending CN108971236A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111715690A (en) * 2019-03-22 2020-09-29 格朗吉斯铝业(上海)有限公司 Hot rolling equipment and rolling process control system for same
CN112453071A (en) * 2020-11-17 2021-03-09 太原理工大学 Method for predicting rolling force and thickness of each layer of cold-rolled metal composite plate

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CN103521518A (en) * 2013-10-14 2014-01-22 云南昆钢新型复合材料开发有限公司 Hot continuous rolling production method of stainless steel composite board strip coil
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CN104070071A (en) * 2014-06-19 2014-10-01 中国重型机械研究院股份公司 Automatic control system used for rolling force of burring roller and control method thereof
CN104281088A (en) * 2014-05-27 2015-01-14 南京钢铁股份有限公司 Second-level system progress control method and device of hot rolled strip rolling mill
CN105268748A (en) * 2014-07-16 2016-01-27 上海梅山钢铁股份有限公司 Hot rolling load distribution method based on product classification
CN106693065A (en) * 2017-02-06 2017-05-24 清华大学深圳研究生院 Manufacturing method of gradient tissue engineering scaffold

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101417292A (en) * 2008-12-16 2009-04-29 攀枝花新钢钒股份有限公司 Method for controlling middle, low grade electric steel rolling using conventional rolling model
CN103521518A (en) * 2013-10-14 2014-01-22 云南昆钢新型复合材料开发有限公司 Hot continuous rolling production method of stainless steel composite board strip coil
CN103978043A (en) * 2014-05-12 2014-08-13 太原科技大学 Technology applicable to rolling force and tension force coordinated control of dual-rack four-roller leveling unit
CN104281088A (en) * 2014-05-27 2015-01-14 南京钢铁股份有限公司 Second-level system progress control method and device of hot rolled strip rolling mill
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CN105268748A (en) * 2014-07-16 2016-01-27 上海梅山钢铁股份有限公司 Hot rolling load distribution method based on product classification
CN106693065A (en) * 2017-02-06 2017-05-24 清华大学深圳研究生院 Manufacturing method of gradient tissue engineering scaffold

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111715690A (en) * 2019-03-22 2020-09-29 格朗吉斯铝业(上海)有限公司 Hot rolling equipment and rolling process control system for same
CN111715690B (en) * 2019-03-22 2022-02-22 格朗吉斯铝业(上海)有限公司 Hot rolling equipment and rolling process control system for same
CN112453071A (en) * 2020-11-17 2021-03-09 太原理工大学 Method for predicting rolling force and thickness of each layer of cold-rolled metal composite plate
CN112453071B (en) * 2020-11-17 2022-07-01 太原理工大学 Method for predicting rolling force and thickness of each layer of cold-rolled metal composite plate

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