CN101116874A - Reversible cold rolling mill flow quantity AGC band thickness control method - Google Patents
Reversible cold rolling mill flow quantity AGC band thickness control method Download PDFInfo
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- CN101116874A CN101116874A CNA2007100117195A CN200710011719A CN101116874A CN 101116874 A CN101116874 A CN 101116874A CN A2007100117195 A CNA2007100117195 A CN A2007100117195A CN 200710011719 A CN200710011719 A CN 200710011719A CN 101116874 A CN101116874 A CN 101116874A
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Abstract
The invention discloses a flow AGC strip thickness control method of a reversing cold rolling mill, which comprises detecting steps of strip thickness and speed at the input and output of the rolling mill, detecting and computating steps of stiffness coefficient of the rolling mill and plasticity coefficient of strip, control steps of precontrolling AGC, monitoring AGC and hydraulic pressure APC in the control of the hydraulic pressure AGC. The invention is characterized in that the flow AGC strip thickness control method of a reversing cold rolling mill, comprises a establishing steps of a mathematical model of the flow AGC control, computating steps of strip theoretical thickness difference at the output of the rolling mill, computating steps of gap compensation regulation of the rolling mill; the cap regulation of delta Sh of the flow AGCregulated by a PI regulator ,is used as the thickness control of the rolling mill, that is, steps of thickness closed ring control of gap compensation of the endocyclic hydraulic pressure AGC of the hydraulic pressure AGC. The invention has real-time thickness compensation without a time delay and is suited to being widely popularized in AGC system of strip single stand reversing cold rolling mill.
Description
Technical field
The present invention relates to a kind of metallurgy industry steel rolling equipment that is applied to, be used for the thickness of strip autocontrol method of single chassis reversable cold-rolling machine, relate in particular to a kind of reversible cold rolling mill flow quantity AGC band thickness control method.
Background technology
This century, a distinguishing feature of steel and iron industry development was, competition grows in intensity, and focus is the quality and the cost of steel.The strip material is mainly used in the various parts of punching out.In order to improve Life of Punch Die and punching precision height, require the thickness and precision height of strip material, plate shape good.So the plate sheet and strip of high-quality, low cost, high yield is the final goal that manufacturer is pursued.
Hydraulic AGC (Automatic Gauge Cortrol is that hydraulic thickness is controlled automatically), it comprises hydraulic pressure APC (control of hydraulic pressure automated location), pre-control AGC, monitoring AGC (thickness supervision control automatically) equal thickness control technology function, is the key technology that improves strip material thickness and precision, improves lumber recovery.In the last few years, this technology develops perfect constantly, having introduced flow quantity AGC (being that band flow thickness is controlled automatically) Thickness Control Technology in the Hydraulic AGC Control of the tandem mill of multimachine frame continuous rolling is used for, before rolling, employing rolls the constant principle of back mass flow, the control of realization thickness of strip, the product quality height does not also have the application of flow quantity AGC Thickness Control Technology in the control of the single chassis reversable cold-rolling machine still few in output, that quality is high.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, develop a kind of reference tandem mill flow quantity AGC THICKNESS CONTROL principle, on the single chassis reversable cold-rolling machine, adopt this thickness of strip control technology, promptly reversible cold rolling mill flow quantity AGC band Thickness Control Technology.Flow quantity AGC is that band flow thickness is controlled automatically, it is according to flowing into milling train and the constant principle of strip quality that flows out milling train in the operation of rolling, calculate just in rolling band exit thickness deviation, with this deviation is that benchmark is revised mill roll-gap, makes the band that shuts out keep desirable exit thickness.The technological means that the present invention adopts is as follows:
A kind of reversible cold rolling mill flow quantity AGC band thickness control method comprises that milling train goes out/enter the mouth the detection step of window of web velocities and thickness; The detection of mill stiffness coefficient and band plastic coefficient and calculation procedure; The control step of pre-control AGC in the control of hydraulic AGC, monitoring AGC and hydraulic pressure APC; It is characterized in that also comprising the steps:
A, set up the Mathematical Modeling of flow quantity AGC control, wherein the parameter of flow quantity AGC mathematics of control model is each detection signal, and Mathematical Modeling is as follows:
V
1×h
1×B
1＝V
0×h
0×B
0，
In the formula: B
0=B
1Band population, exit width, V
1---milling train outlet window of web velocities, V
0---milling train inlet window of web velocities, h
1---milling train outlet thickness of strip, h
0---milling train inlet thickness of strip;
B, the Mathematical Modeling that provides according to step a can draw the computing formula of the theoretical thick difference of milling train outlet side band, and detection signal and setting signal are brought in the formula of the theoretical thick difference of milling train outlet side band:
δh＝((h
0)V
0/V
1)-h
1g
In the formula: theoretical thick poor, the h of δ h---milling train outlet side band
1g---outlet band is set thickness, and it is theoretical thick poor to calculate milling train outlet side band;
C, the theoretical thick poor δ h of the milling train outlet side band that draws according to step b carry out the calculating of roll gap Compensation Regulation amount in conjunction with the self-characteristic of band and milling train, and computing formula is as follows:
δS
h＝δh(1+K
M/K
G)
In the formula: δ S
h---roll gap regulated quantity, K
G---mill stiffness coefficient, K
M---band plastic coefficient;
The roll gap regulated quantity δ S of d, flow quantity AGC that step c is drawn
hAfter the pi regulator adjusting, as the milling train THICKNESS CONTROL, promptly the roller of ring hydraulic pressure APC meets compensation rate to carry out closed loop thickness control in the hydraulic AGC.
Reversible cold rolling mill flow quantity AGC band thickness control method provided by the invention is to gather milling train entrance velocity and thickness, and muzzle velocity is carried out real-time thickness compensation as feedback signal, the not free hysteresis.So can implement effectively control to the factor that rise owing to mill milling speed, supplied materials thickness, roll footpath, tension fluctuation etc. disturb exit thickness.Be that other control technology function institute is irrealizable in the original hydraulic AGC thickness control system.Therefore, this technology is the indispensable key control technology function of reversable mill THICKNESS CONTROL, is to improve rolling mill thickness control accuracy, the basic guarantee that improves lumber recovery.
Description of drawings
Fig. 1 is flow quantity AGC and hydraulic AGC system control principle figure;
Fig. 2 is the flow quantity AGC control flow chart.
The specific embodiment
As shown in Figure 1 and Figure 2, flow quantity AGC THICKNESS CONTROL function is a part of hydraulic AGC milling train automatic gauge control system, is an outer shroud of mill roll-gap THICKNESS CONTROL.This control loop will detect inlet thickness, the speed of feedback, and it is δ S that muzzle velocity, the equational computing of thickness setting signal process flow quantity AGC Mathematical Modeling obtain the theoretical mill roll-gap bias adjustment amount that exports thick difference and will compensate accordingly
h, this regulated quantity δ S
hPass through the interior ring (being hydraulic pressure APC) of hydraulic AGC again and regulate output, the milling train servo-cylinder is changed, the corresponding variation also takes place by the controlled quentity controlled variable requirement in the roll gap of milling train and draught pressure so, thereby reduced the thickness deviation of band, reached the control purpose.
Set up the Mathematical Modeling of flow quantity AGC control, wherein the parameter of flow quantity AGC mathematics of control model is each detection signal, and flow quantity AGC is based on following fundamental formular:
V
1×h
1×B
1＝V
0×h
0×B
0
In the formula: B
0=B
1Band population, exit width
V
1---milling train outlet window of web velocities
V
0---milling train inlet window of web velocities
h
1---milling train outlet thickness of strip
h
0---milling train inlet thickness of strip
The Mathematical Modeling that provides according to step a can draw the computing formula of the theoretical thick difference of milling train outlet side band, and detection signal and setting signal are brought in the formula of the theoretical thick difference of milling train outlet side band:
δ?h＝((h
0)V
0/V
1)-h
1g
In the formula: δ h---milling train outlet side band is theoretical thick poor
h
1g---outlet band is set thickness, and it is theoretical thick poor to calculate milling train outlet side band;
The theoretical thick poor δ h of milling train outlet side band carries out the calculating of roll gap Compensation Regulation amount in conjunction with the self-characteristic of band and milling train, and computing formula is as follows:
δS
h＝δh(1+K
M/K
G)
In the formula: δ S
h---roll gap regulated quantity,
K
G---mill stiffness coefficient,
K
M---band plastic coefficient;
V
0And V
1Inlet/outlet speed is measured feedback by the laser velocimeter that is arranged at milling train inlet/outlet side (or be installed on the slewing rollers speed measuring coder); h
0Milling train inlet thickness of strip is measured feedback by the X-ray thickness gauge that is arranged at the milling train entrance side; h
1gBe the exit thickness setting value, come from process control computer; The mill stiffness COEFFICIENT K
GUnder off-line state, measure; Band plastic coefficient K
MCalculate by the automatic control system real-time sampling.V
0, V
1, h
0, h
1g, K
G, K
MThese signals are real the collection during by computer control system, is used for the flow quantity AGC control loop and regulates control, the roll gap regulated quantity δ S of flow quantity AGC
hAfter the pi regulator adjusting, as the milling train THICKNESS CONTROL is that the roller that encircles hydraulic pressure APC in the hydraulic AGC meets compensation rate to carry out closed loop thickness control, the signals collecting of flow quantity AGC control function, the enforcement of control model, the adjusting calculating of control compensation rate all is to realize by the industrial control computer software program of fast precise.
The reversible cold rolling mill flow quantity AGC band Thickness Control Technology, the THICKNESS CONTROL effect is very obvious.Therefore, this technology is the indispensable key control technology function of reversable mill THICKNESS CONTROL, is to improve rolling mill thickness control accuracy, the basic guarantee that improves lumber recovery.
The above; only be the preferable specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or change according to technical scheme of the present invention and inventive concept thereof, all should be encompassed within protection scope of the present invention.
Claims (1)
1. a reversible cold rolling mill flow quantity AGC band thickness control method comprises that milling train goes out/enter the mouth the detection step of window of web velocities and thickness; The detection of mill stiffness coefficient and band plastic coefficient and calculation procedure; The control step of pre-control AGC in the control of hydraulic AGC, monitoring AGC and hydraulic pressure APC; It is characterized in that also comprising the steps:
A, set up the Mathematical Modeling of flow quantity AGC control, wherein the parameter of flow quantity AGC mathematics of control model is each detection signal, and Mathematical Modeling is as follows:
V
1×h
1×B
1＝V
0×h
0×B
0，
In the formula: B
0=B
1Band population, exit width, V
1---milling train outlet window of web velocities, V
0---milling train inlet window of web velocities, h
1---milling train outlet thickness of strip, h
0---milling train inlet thickness of strip;
B, the Mathematical Modeling that provides according to step a can draw the computing formula of the theoretical thick difference of milling train outlet side band, and detection signal and setting signal are brought in the formula of the theoretical thick difference of milling train outlet side band:
δh＝((h
0)V
0/V
1)-h
1g
In the formula: theoretical thick poor, the h of δ h---milling train outlet side band
1g---outlet band is set thickness, and it is theoretical thick poor to calculate milling train outlet side band;
C, the theoretical thick poor δ h of the milling train outlet side band that draws according to step b carry out the calculating of roll gap Compensation Regulation amount in conjunction with the self-characteristic of band and milling train, and computing formula is as follows:
δS
h＝δh(1+K
M/K
G)
In the formula: δ S
h---roll gap regulated quantity, K
G---mill stiffness coefficient, K
M---band plastic coefficient;
The roll gap regulated quantity δ S of d, flow quantity AGC that step c is drawn
hAfter the pi regulator adjusting, as the milling train THICKNESS CONTROL, promptly the roller of ring hydraulic pressure APC meets compensation rate to carry out closed loop thickness control in the hydraulic AGC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100117195A CN101116874A (en) | 2007-06-15 | 2007-06-15 | Reversible cold rolling mill flow quantity AGC band thickness control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100117195A CN101116874A (en) | 2007-06-15 | 2007-06-15 | Reversible cold rolling mill flow quantity AGC band thickness control method |
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| Publication Number | Publication Date |
|---|---|
| CN101116874A true CN101116874A (en) | 2008-02-06 |
Family
ID=39053221
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100117195A Pending CN101116874A (en) | 2007-06-15 | 2007-06-15 | Reversible cold rolling mill flow quantity AGC band thickness control method |
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|---|---|---|---|---|
| CN102145346A (en) * | 2010-12-09 | 2011-08-10 | 湖南华菱湘潭钢铁有限公司 | Method for rolling wide and thick steel plate by adopting complete negative allowance |
| CN102172637A (en) * | 2010-12-17 | 2011-09-07 | 中冶南方工程技术有限公司 | High-accuracy automatic thickness control method and equipment based on thickness gauge subsection monitoring |
| CN102300652A (en) * | 2009-01-30 | 2011-12-28 | Sms西马格股份公司 | Device and method for winding a band having a variable band thickness, particularly a metal band |
| CN102343365A (en) * | 2011-09-16 | 2012-02-08 | 中冶南方工程技术有限公司 | Method and system for automatic thickness control over high-precision strip steel rolling under monitoring |
| CN101992220B (en) * | 2009-08-20 | 2012-09-19 | 宝山钢铁股份有限公司 | Method for controlling rigidity of mill housing |
| CN102672999A (en) * | 2011-03-16 | 2012-09-19 | 上海板机电气制造有限公司 | Method, device and system for controlling thickness of plate blank |
| CN102764771A (en) * | 2012-07-31 | 2012-11-07 | 中冶赛迪电气技术有限公司 | Second-flow based self-adaptive method for controlling thickness of plate of single-stand reversing rolling mill |
| CN102950155A (en) * | 2012-10-16 | 2013-03-06 | 河北钢铁股份有限公司唐山分公司 | AGC (Automatic Gain Control) method capable of calculating thickness based on second flow |
| CN103316927A (en) * | 2012-03-19 | 2013-09-25 | 株式会社日立制作所 | Rolling control device and rolling control method |
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| CN103639207A (en) * | 2013-12-19 | 2014-03-19 | 西南铝业（集团）有限责任公司 | Second-flow thickness control method and system for single-frame four-roll high-speed cold-rolling mill |
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| CN104324947A (en) * | 2014-11-13 | 2015-02-04 | 广东华冠钢铁有限公司 | Roll plate thickness control method and roll plate thickness control system |
| CN105195524A (en) * | 2015-10-21 | 2015-12-30 | 东北大学 | Plate and strip thickness compensation control method in speeding up or down rolling process during cold rolling |
| CN105312329A (en) * | 2014-07-16 | 2016-02-10 | 宝山钢铁股份有限公司 | Method for conducting automatic monitoring on states of cold continuous mill thickness meters |
| CN105583236A (en) * | 2015-12-22 | 2016-05-18 | 中冶南方工程技术有限公司 | Method for online acquisition of plasticity coefficient of cold-rolled strip steel |
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-
2007
- 2007-06-15 CN CNA2007100117195A patent/CN101116874A/en active Pending
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| CN102172637A (en) * | 2010-12-17 | 2011-09-07 | 中冶南方工程技术有限公司 | High-accuracy automatic thickness control method and equipment based on thickness gauge subsection monitoring |
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