CN1483526A - Mthod for controlling roller gap of precision rolling machine of band steel - Google Patents

Mthod for controlling roller gap of precision rolling machine of band steel Download PDF

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Publication number
CN1483526A
CN1483526A CNA021329745A CN02132974A CN1483526A CN 1483526 A CN1483526 A CN 1483526A CN A021329745 A CNA021329745 A CN A021329745A CN 02132974 A CN02132974 A CN 02132974A CN 1483526 A CN1483526 A CN 1483526A
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China
Prior art keywords
value
finish rolling
temperature
slab
gap
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CNA021329745A
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CN1216699C (en
Inventor
凯 郑
郑凯
黄浩东
吴胜田
沙孝春
杨旭
杨大军
史乃安
谷春阳
刘威
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Angang New Steel Co ltd
Angang Steel Co Ltd
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XINGANGTIE CO Ltd ANSHAN IRON AND STEEL GROUP
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Publication of CN1216699C publication Critical patent/CN1216699C/en
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Abstract

The present invention relates to a control method of roll gap of steel strip finishing rolling, mill, mainly including: using computer to successively calculate finishing rolling inlet temp. value, temp. values of all the machine frames of finishing rolling mill, rolling force values of all the machine frames and roll gap values of all the machine frames, setting and using computer to control PLC, and utilizing PLC to regulate screwdown motor and hydraulic device to regulate roll gap. Said invention also provides the mathematical model of finishing rolling inlet temperature, it can accurately control the accuracy of the roll gap, and can raise its production efficiency.

Description

The control method of band aluminium mill roll-gap
Affiliated field:
The present invention relates to a kind of automatic control system of milling train, especially a kind of control method with the aluminium mill roll-gap.
Background technology:
In the production process of hot rolled plate band, the control of finishing mill roll gap is mainly calculated by process computer and is finished.Temperature value, each frame roll-force value of finish rolling, each frame gap values between rollers of finish rolling to finish rolling inlet temperature value, each frame of finish rolling calculates successively, and send result of calculation to the one-level computer, by one-level computer control PLC, depress motor and hydraulic means adjustment roll gap by the PLC adjustment.Generally speaking, the calculating of finish rolling inlet temperature mainly is by the computer network control system, pyrometer by on-the-spot roughing exit detects the actual value feedback one-level computer of intermediate blank head temperature and sends process control computer to, calculate the running time of intermediate blank on this section roller-way by process control computer, calculate temperature drop according to cooling air mode, calculate the temperature of finish rolling porch at last.At present, owing to after having increased a Coil Box between roughing and the finish rolling, produced new problem again in order to aspect problems such as alleviation rolling line weak point, watermark temperature and de-scalings.Through after the conversion end to end of Coil Box, because variation has taken place in physical location, the intermediate slab that Coil Box is batched is conducted in heat, very big variation has also taken place in thermal-radiating mode, it is inaccurate that this just causes reducing the model accounting temperature with conventional temperature, thereby it is inaccurate to cause the finish rolling inlet temperature to be calculated, this also just makes the inlet temperature of each frame of finish rolling that calculates, outlet temperature is inaccurate, each frame roll-force is calculated inaccurate, the roll gap precomputation value of each frame is inaccurate, cause exit thickness inaccurate, influence the product quality of finished product band, the head hit rate of process control has only 72%.
Summary of the invention:
The object of the present invention is to provide a kind of control method with the aluminium mill roll-gap, by accurate Calculation to finish rolling inlet temperature (being the temperature of intermediate blank head), improve process control model head hit rate, help the precision control of finishing mill roll gap and the width control of hot rolled plate band, reach the thickness and precision of raising finished product band and the purpose of lumber recovery to the greatest extent.
The object of the present invention is achieved like this, the control method of this band aluminium mill roll-gap mainly comprises by computer successively to the calculating of the temperature value of finish rolling inlet temperature value, each frame of finish rolling, each frame roll-force value of finish rolling, each frame gap values between rollers of finish rolling, set and give the one-level computer, by one-level computer control PLC, depress motor and hydraulic means adjustment roll gap by the PLC adjustment, the Mathematical Modeling of wherein finish rolling inlet temperature is:
FET＝RDT-αH-βGD-γL+δ
------finish rolling inlet temperature wherein: FET;
RDT------roughing mill R2 outlet afterbody actual temperature, its numerical value is by roughing exit pyrometer
Detect the actual value feedback one-level computer of intermediate blank head temperature and send process control computer to;
H---the thickness of roughing mill R2 outlet intermediate blank, its numerical value be by the width of finished product band,
The thickness decision, the width of finished product band, thickness then pass through the rolling scaduled transmission of three grades of controls;
GD------rolling steel grade calculated value, specifically calculate by following formula:
GD＝C+Mn/6+Si/24
C, Si, Mn are the composition of continuous casting steel billet, and its numerical value is by rolling scaduled transmission;
The length of L------intermediate blank, its numerical value is calculated by following roughing model:
L=L Slab* H Slab/ H
Wherein: L SlabThe length of------continuous casting steel billet;
H SlabThe thickness of------continuous casting steel billet;
α, β, γ------intermediate variable coefficient;
δ------temperature compensation value.
The intermediate variable factor alpha of the Mathematical Modeling of the finish rolling inlet temperature among the present invention is 0.03～0.65, β is 0.612～0.92, γ is 0.000001～0.0000041, and temperature compensation value δ is-3 ℃～4 ℃.
The present invention is owing to having rebulid Mathematical Modeling in the production process of batching intermediate blank in the use Coil Box, finish rolling inlet temperature (being the temperature of intermediate blank head) has been carried out accurate calculating, make process control model head hit rate bring up to present 96% from original 72%, improve the precision of finishing mill roll gap and the width accuracy of hot rolled plate band effectively, reached the thickness and precision of raising finished product band and the purpose of lumber recovery to the greatest extent.
Description of drawings:
Fig. 1 is a control flow chart of the present invention.
The specific embodiment:
Below in conjunction with accompanying drawing the present invention is described in further detail.
As shown in Figure 1, the control method of band aluminium mill roll-gap of the present invention, mainly comprise by computer successively to the calculating of the temperature value of finish rolling inlet temperature value, each frame of finish rolling, each frame roll-force value of finish rolling, each frame gap values between rollers of finish rolling, set and give the one-level computer, by one-level computer control PLC, depress motor and hydraulic means adjustment roll gap by the PLC adjustment, the Mathematical Modeling of wherein finish rolling inlet temperature is:
FET＝RDT-αH-βGD-γL+δ
------finish rolling inlet temperature wherein: FET;
RDT------roughing mill R2 outlet afterbody actual temperature, its numerical value is by roughing exit pyrometer
Detect the actual value feedback one-level computer of intermediate blank head temperature and send process control computer to;
The thickness of H------roughing mill R2 outlet intermediate blank, its numerical value be by the width of finished product band,
The thickness decision, the width of finished product band, thickness then pass through the rolling scaduled transmission of three grades of controls;
GD------rolling steel grade calculated value, specifically calculate by following formula:
GD＝C+Mn/6+Si/24
C, Si, Mn are the composition of continuous casting steel billet, and its numerical value is by rolling scaduled transmission;
The length of L------intermediate blank, its numerical value is calculated by following roughing model:
L=L Slab* H Slab/ H
Wherein: L SlabThe length of------continuous casting steel billet;
H SlabThe thickness of------continuous casting steel billet;
α, β, γ------intermediate variable coefficient;
δ------temperature compensation value.
The intermediate variable factor alpha of calculating the Mathematical Modeling of finishing mill inlet temperature among the present invention is 0.03～0.65, β is 0.612～0.92, γ is 0.000001～0.0000041, and temperature compensation value δ is-3 ℃～4 ℃.
The temperature compensation value of Mathematical Modeling that calculates the finishing mill inlet temperature among the present invention is relevant with environment temperature, and during summer 1 ℃～4 ℃, during winter-3 ℃～-1 ℃.
The value of α, β, γ intermediate variable coefficient is relevant with intermediate blank thickness, steel grade and length respectively, sees table 1, table 2, table 3 for details.
Table 1: the intermediate blank thickness of different size and corresponding α value
Embodiment Thickness (mm) The α value
????1 ????23≤H＜26 ????0.61
????2 ????26≤H＜29 ????0.52
????3 ????29≤H＜32 ????0.4
????4 ????32≤H＜34 ????0.33
????5 ????34≤H＜36 ????0.23
????6 More than 36 ????0.12
Table 2: the intermediate blank steel grade of different size and corresponding β value
Embodiment ????GD The β value
????1 ????0.1≤GD＜0.22 ????0.62
????2 ????0.22≤GD＜0.3 ????0.71
????3 ????0.3≤GD＜0.36 ????0.75
????4 ????0.36≤GD＜0.42 ????0.79
????5 ????0.42≤GD＜0.6 ????0.85
????6 0.6 more than ????0.9
Table 3: the intermediate blank length of same specification and corresponding γ value
Embodiment Length (m) The γ value
????1 More than 80 ????0.0000012
????2 ????65≤L＜80 ????0.0000019
????3 ????55≤L＜65 ????0.0000023
????4 ????44≤L＜55 ????0.0000032
????5 ????30≤L＜44 ????0.0000035
????6 Below 30 ????0.000004
As shown in Figure 1, the present invention can select according to actual conditions in process of production: if use Coil Box to batch intermediate slab (being that Coil Box is not straight-through), then carry out the Mathematical Modeling (being hot rolling oven temperature, degree model) of finish rolling inlet temperature of the present invention; If do not use Coil Box to batch intermediate slab (being that Coil Box is straight-through), then carry out the Mathematical Modeling of existing finish rolling inlet temperature.

Claims (3)

1, a kind of control method with the aluminium mill roll-gap, mainly comprise by computer successively to the calculating of the temperature value of finish rolling inlet temperature value, each frame of finish rolling, each frame roll-force value of finish rolling, each frame gap values between rollers of finish rolling, set and give the one-level computer, by one-level computer control PLC, depress motor and hydraulic means adjustment roll gap by the PLC adjustment, it is characterized in that: the Mathematical Modeling of finish rolling inlet temperature is:
FET＝RDT-αH-βGD-γL+δ
------finish rolling inlet temperature wherein: FET;
RDT------roughing mill R2 outlet afterbody actual temperature, its numerical value is by roughing exit pyrometer
Detect the actual value feedback one-level computer of intermediate blank head temperature and send process control computer to;
The thickness of H------roughing mill R2 outlet intermediate blank, its numerical value be by the width of finished product band,
The thickness decision, the width of finished product band, thickness then pass through the rolling scaduled transmission of three grades of controls;
GD---rolling steel grade calculated value, specifically calculate by following formula:
GD＝C+Mn/6+Si/24
C, Si, Mn are the composition of continuous casting steel billet, and its value is by rolling scaduled transmission;
The length of L---intermediate blank, its numerical value is calculated by following roughing model:
L=L Slab* H Slab/ H
Wherein: L SlabThe length of------continuous casting steel billet;
H SlabThe thickness of------continuous casting steel billet;
α, β, γ------intermediate variable coefficient;
δ------temperature compensation value.
2, the control method of band aluminium mill roll-gap according to claim 1 is characterized in that the intermediate variable factor alpha is 0.03～0.65, β is 0.612～0.92, γ is 0.000001～0.0000041, and temperature compensation value δ is-3 ℃～4 ℃.
3, the control method of band aluminium mill roll-gap according to claim 2, when it is characterized in that temperature compensation value δ is summer 1 ℃～4 ℃, during winter-3 ℃～-1 ℃.
CN 02132974 2002-09-19 2002-09-19 Mthod for controlling roller gap of precision rolling machine of band steel Expired - Fee Related CN1216699C (en)

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Application Number Priority Date Filing Date Title
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CN1216699C CN1216699C (en) 2005-08-31

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100421839C (en) * 2005-06-30 2008-10-01 宝山钢铁股份有限公司 Double roller continuous thin-belt casting method
CN101588876B (en) * 2007-01-23 2011-08-17 西门子公司 Regulation device for a rolling stand and items corresponding thereto
CN102189102A (en) * 2010-03-09 2011-09-21 中冶东方工程技术有限公司上海分公司 Method for rolling liquid core under heavy reduction rate by virtue of online thickness regulating roll by utilizing continuous casting machine
CN102233358A (en) * 2010-04-20 2011-11-09 宝山钢铁股份有限公司 Adaptive strip threading correction method for roll gaps of hot finishing mill set
CN101869914B (en) * 2009-04-22 2012-03-28 宝山钢铁股份有限公司 Thickness control method of finish roller strip steel and device
CN101930225B (en) * 2009-06-23 2012-05-30 宝山钢铁股份有限公司 Hot rolling reeling width automatic control method and device thereof
CN102120224B (en) * 2010-01-08 2012-10-10 宝山钢铁股份有限公司 Control method of automatic deviation correction during rolling of hot continuous rolling mill
CN102896156A (en) * 2012-09-29 2013-01-30 鞍钢股份有限公司 Optimization method for hot rolled strip steel roll gap model
CN102921771A (en) * 2011-08-08 2013-02-13 宝山钢铁股份有限公司 Method for setting roller gap of coarse straightening machine
CN101829687B (en) * 2009-03-13 2013-04-03 鞍钢股份有限公司 Method for controlling roll gap of strip steel finishing mill to eliminate influence of specification change
CN103056168A (en) * 2013-01-10 2013-04-24 河北省首钢迁安钢铁有限责任公司 Method for controlling deviation of intermediate billet of coil box
CN103464473A (en) * 2013-08-23 2013-12-25 安阳钢铁股份有限公司 Automatic adjustment method of finishing roll gap level
CN103551398B (en) * 2013-11-06 2015-09-30 北京首钢股份有限公司 A kind of non-orientation silicon steel hot rolled coil Wedge Control
CN105013835A (en) * 2014-04-23 2015-11-04 宝山钢铁股份有限公司 Original roller seam setting method based on thermal crown in ultra-thin strip rolling conducted by cold continuous rolling unit
CN105665451A (en) * 2016-03-15 2016-06-15 山东钢铁股份有限公司 Calibration method for finishing mill
CN107583961A (en) * 2017-10-16 2018-01-16 辽宁科技大学 A kind of cold continuous rolling is without strip roll gap calibration control method
CN109604349A (en) * 2018-12-28 2019-04-12 中铝瑞闽股份有限公司 A kind of aluminum alloy hot rolling band method for controlling shape
CN110227721A (en) * 2019-05-31 2019-09-13 宝钢湛江钢铁有限公司 A kind of control method for mill roll-gap in speed-change process

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100421839C (en) * 2005-06-30 2008-10-01 宝山钢铁股份有限公司 Double roller continuous thin-belt casting method
CN101588876B (en) * 2007-01-23 2011-08-17 西门子公司 Regulation device for a rolling stand and items corresponding thereto
CN101829687B (en) * 2009-03-13 2013-04-03 鞍钢股份有限公司 Method for controlling roll gap of strip steel finishing mill to eliminate influence of specification change
CN101869914B (en) * 2009-04-22 2012-03-28 宝山钢铁股份有限公司 Thickness control method of finish roller strip steel and device
CN101930225B (en) * 2009-06-23 2012-05-30 宝山钢铁股份有限公司 Hot rolling reeling width automatic control method and device thereof
CN102120224B (en) * 2010-01-08 2012-10-10 宝山钢铁股份有限公司 Control method of automatic deviation correction during rolling of hot continuous rolling mill
CN102189102B (en) * 2010-03-09 2013-02-06 中冶东方工程技术有限公司秦皇岛研究设计院 Method for rolling liquid core under heavy reduction rate by virtue of online thickness regulating roll by utilizing continuous casting machine
CN102189102A (en) * 2010-03-09 2011-09-21 中冶东方工程技术有限公司上海分公司 Method for rolling liquid core under heavy reduction rate by virtue of online thickness regulating roll by utilizing continuous casting machine
CN102233358B (en) * 2010-04-20 2013-02-06 宝山钢铁股份有限公司 Method for correcting roll gaps of hot finishing mill set by threading self-adaption
CN102233358A (en) * 2010-04-20 2011-11-09 宝山钢铁股份有限公司 Adaptive strip threading correction method for roll gaps of hot finishing mill set
CN102921771B (en) * 2011-08-08 2014-12-24 宝山钢铁股份有限公司 Method for setting roller gap of coarse straightening machine
CN102921771A (en) * 2011-08-08 2013-02-13 宝山钢铁股份有限公司 Method for setting roller gap of coarse straightening machine
CN102896156A (en) * 2012-09-29 2013-01-30 鞍钢股份有限公司 Optimization method for hot rolled strip steel roll gap model
CN103056168A (en) * 2013-01-10 2013-04-24 河北省首钢迁安钢铁有限责任公司 Method for controlling deviation of intermediate billet of coil box
CN103056168B (en) * 2013-01-10 2015-09-30 北京首钢股份有限公司 A kind of method controlling deviation of intermediate billet of coil box
CN103464473A (en) * 2013-08-23 2013-12-25 安阳钢铁股份有限公司 Automatic adjustment method of finishing roll gap level
CN103551398B (en) * 2013-11-06 2015-09-30 北京首钢股份有限公司 A kind of non-orientation silicon steel hot rolled coil Wedge Control
CN105013835A (en) * 2014-04-23 2015-11-04 宝山钢铁股份有限公司 Original roller seam setting method based on thermal crown in ultra-thin strip rolling conducted by cold continuous rolling unit
CN105665451A (en) * 2016-03-15 2016-06-15 山东钢铁股份有限公司 Calibration method for finishing mill
CN105665451B (en) * 2016-03-15 2017-06-23 山东钢铁股份有限公司 Finishing mill scaling method
CN107583961A (en) * 2017-10-16 2018-01-16 辽宁科技大学 A kind of cold continuous rolling is without strip roll gap calibration control method
CN107583961B (en) * 2017-10-16 2018-11-16 辽宁科技大学 A kind of cold continuous rolling is without strip roll gap calibration control method
CN109604349A (en) * 2018-12-28 2019-04-12 中铝瑞闽股份有限公司 A kind of aluminum alloy hot rolling band method for controlling shape
CN109604349B (en) * 2018-12-28 2020-08-07 中铝瑞闽股份有限公司 Control method for plate shape of aluminum alloy hot rolled strip
CN110227721A (en) * 2019-05-31 2019-09-13 宝钢湛江钢铁有限公司 A kind of control method for mill roll-gap in speed-change process

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