CN107008758B - Cold-strip steel high precision plates shape surface roughness On-Line Control Method and system - Google Patents
Cold-strip steel high precision plates shape surface roughness On-Line Control Method and system Download PDFInfo
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- CN107008758B CN107008758B CN201710187209.7A CN201710187209A CN107008758B CN 107008758 B CN107008758 B CN 107008758B CN 201710187209 A CN201710187209 A CN 201710187209A CN 107008758 B CN107008758 B CN 107008758B
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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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
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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
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
- B21B37/38—Control of flatness or profile during rolling of strip, sheets or plates using roll bending
-
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
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Abstract
The present invention relates to a kind of cold-strip steel high precision plates shape surface roughness On-Line Control Method and system, the deficiency of the method that belt steel surface roughness is monitored by sampling observation sampling, off-line analysis test, on-line tuning production technology routinely used at present is overcome.The present invention proposes one kind on cold-strip steel continuous processing unit, pass through on-line checking belt steel surface roughness, skin pass rolling power is adjusted in real time according to the deviation between surface roughness detected value and desired value, while in order to keep strip mechanical performance and plate shape to be substantially unaffected, smooth tension and smooth bending roller force are adjusted accordingly, realize the method that On-line Control is carried out to belt steel surface roughness, the control accuracy of Cold-strip Steel Surface roughness can be improved, the requirement of downstream user is preferably met.
Description
Technical field
The present invention relates to cold rolling of strip steel technical field, more particularly to a kind of cold-strip steel high precision plates shape surface is coarse
Spend online control model and control method and system.
Background technology
The downstream user of steel and iron industry is increasingly stringenter the quality requirement of cold-rolled steel strip products, and surface roughness is for cold
Roll it is most important for plate, it be influence steel plate formability key factor, be one of the important indicator of cold-rolled products quality.
Currently, in cold rolled strip steel production practice, it is to the usual mode that belt steel surface roughness is monitored, after relevant cold rolling
Machine set outlet (such as Continuous Hot Dip Galvanizing or skin pass mill group) is handled, sampling observation sampling is carried out to strip, is then tested in analysis
Laboratory carries out model the surface roughness parameter that off-line test obtains strip, and requires to be compared with the technology of downstream user
Compared with.If belt steel surface roughness is unsatisfactory for the requirement of downstream user, in the subsequent production production to similar strip in the works
Technological parameter carries out necessary adjustment, sampling, off-line analysis test, on-line tuning technological parameter etc. is then inspected by random samples again, until strip
Surface roughness fully meet downstream user require until.This method has hysteresis quality and noncontinuity, sampling point general
In head and tail, the roughness feature of monoblock steel plate can not be represented.
With being constantly progressive for technology, non-contacting roughness measurement method has obtained rapid development, and this method is with light
Measurement method is the most universal, includes mainly light cross-section method, optical interferometry, speckle method, scattering method etc..Measuring method has
Measuring speed is fast, not damaged, it can be achieved that the advantages that real-time online measuring, and rapid development has been obtained in nearest decades.Germany
The SORM 3plus systems of EMG Automation Co., Ltd exploitation, using the scattering principle of light, by the measurement to angle can not with
Strip measures the surface roughness of cold-strip steel in movement in the case of contacting.AMEPA companies are developed using light cross-section method principle
A kind of surface rough (SRM) is simultaneously applied in the production line of many companies in the Europe such as Germany, Belgium, and is obtained
Significant effect.Foreign countries have 50 a plurality of units (CGL, CAPL etc.) and install roughness on-line detector, and generation is realized in part
For offline sample detection.Domestic Shoudu Iron and Steel Co cold rolling mill and Jiangsu Zhangjiagang sand steel etc. have introduced the SRM systems of AMEPA companies
System, but non-contact type on-line measurement technology is not popularized yet at present, still prodigious development space from now on.
Siemens etc. is in exploitation formation process roughness Closed loop Control.The existing 10 a plurality of units' installations in the country are coarse
On-line detector is spent, but is currently only used for production process monitoring, not yet carries out the application technical researches such as roughness On-line Control.
Invention content
In order to solve the deficiency of offline inspection Cold-strip Steel Surface roughness, the fluctuation of belt steel surface roughness, this hair are reduced
Bright is designed to provide a kind of Cold-strip Steel Surface roughness On-Line Control Method, and the On-Line Control Method by examining online
The surface roughness of measuring tape steel, according to the deviation between surface roughness detected value and desired value to associated production technological parameter
(such as skin pass rolling power) is adjusted in real time, to realize the on-line automatic closed-loop control to Cold-strip Steel Surface roughness,
To improve the control accuracy of Cold-strip Steel Surface roughness, preferably meet the requirement of downstream user.
The technical scheme is that：A kind of cold-strip steel high precision plates shape surface roughness On-Line Control Method, it is described
On-Line Control Method includes the following steps：
S1:Calculate the measured value m of belt steel surface roughness mactWith the desired value m of the belt steel surface roughnessrefBetween
Belt steel surface roughness deviation △ m；
The belt steel surface roughness m is belt steel surface profile arithmetic average error RaOr ten point height of nao-and micro relief
RzOr peak density Pc。
S2：Determine belt steel flating roll-force regulated quantity：
The belt steel surface roughness deviation △ m obtained according to step S1, determine belt steel flating roll-force regulated quantity △ P,
To eliminate belt steel surface roughness deviation.
S3:Determine belt steel flating tension adjustment amount：
The skin pass rolling power regulated quantity △ P obtained according to step S2, determine smooth entrance tension adjustment amount △ T0Or it is flat
Whole outlet tension adjustment amount △ T1, to keep smooth elongation percentage constant so that strip mechanical performance is substantially unaffected.
S4:Determine belt steel flating bending roller force regulated quantity：
The belt steel flating roll-force regulated quantity △ P obtained according to step S2, determine smooth bending roller force regulated quantity △ S, to protect
The whole rear belt plate shape that maintains an equal level is substantially unaffected.
S5:Determine whether belt steel rolling power regulated quantity exports：
By the absolute value of the belt steel surface roughness deviation obtained in step S1 | △ m | with shown belt steel surface roughness
Corresponding closed-loop control threshold value △ mlimIt makes comparisons, wherein △ mlim>0。
When | △ m | >=△ mlim, go to step S2 adjustment belt steel flating roll-forces；When | △ m |<△mlimWhen, without adjustment
Belt steel flating roll-force.
Further, the △ P calculation formula of belt steel flating roll-force regulated quantity described in step S2 are as follows：
△ P=Gainm_P×△m/Km_P
In formula：Gainm_PFor skin pass rolling force control gain, 0<Gainm_P≤1.0；Km_PIt is skin pass rolling power to strip table
Surface roughness influences coefficient, For differential operator.
Further, smooth entrance tension adjustment amount △ T described in step S30Calculation formula is as follows：
In formula：For smooth entrance tension force gain, For smooth entrance
Power to skin pass rolling power carry-over factor,ε is smooth elongation percentage.
The smooth outlet tension adjustment amount △ T1Computational methods are as follows：
In formula：For smooth outlet tension force gain, For smooth outlet
Power to skin pass rolling power carry-over factor,ε is smooth elongation percentage.
Further, smooth bending roller force regulated quantity △ S=Gain described in step S4P_S×△P/KP_S
In formula：GainP_SFor smooth roller force control gain, 0<GainP_S≤1.0；KP_SIt is smooth bending roller force to leveling rolling
Power carry-over factor processed,C is strip profile.
The present invention also provides a kind of cold-strip steel high precision plates shape surface roughness on-line control systems, which is characterized in that
Including sequentially connected planisher and surface roughness instruments；The surface roughness instruments are thick for detecting belt steel surface
The measured value m of rugosity mact；The planisher is used for according to above-mentioned cold-strip steel high precision plates shape surface roughness On-line Control
Method controls Cold-strip Steel Surface roughness.
The beneficial effects of the present invention are：A kind of Cold-strip Steel Surface roughness On-Line Control Method is provided, it is described online
Control method can realize the line closed loop control to Cold-strip Steel Surface roughness, improve the control of Cold-strip Steel Surface roughness
Precision improves product quality.
Description of the drawings
Fig. 1 is Cold-strip Steel Surface roughness On-line Control equipment schematic diagram of the present invention；
Fig. 2 is the curve graph that skin pass rolling power of the present invention influences belt steel surface profile arithmetic average error；
Fig. 3 is the curve graph that skin pass rolling power of the present invention influences ten point height of belt steel surface nao-and micro relief；
Fig. 4 is Cold-strip Steel Surface roughness On-line Control flow chart of the present invention.
Fig. 5 is the curve graph that skin pass rolling power of the present invention influences belt steel surface peak density；
In Fig. 1,1, uncoiler, 2, strip, 3, continuous annealing furnace, 4, planisher, 5, surface roughness instruments, 6, batch
Machine.
Specific implementation mode
Cold rolled strip steel production flow is：Pickling-cold rolling-annealing-is smooth-coating, shearing and packaging.Wherein, flattening process
There is larger impact to the surface roughness of cold-strip steel.
Surface roughness On-Line Control Method provided by the invention can be completed in equipment as shown in Figure 1.Such as Fig. 1 institutes
Show, by the strip 2 of the transmission of uncoiler 1 out after continuous annealing furnace 3 and planisher 4 are handled, by surface roughness
On-line computing model 5, the measured value of the belt steel surface roughness m detected by the surface roughness on-line computing model 5 is under
Desired value required by trip user is compared, if meeting downstream user requirement, strip 2 passes through surface roughness and exists
Line monitor 5 enters coating, shearing and packing stage into coiling machine 6；If not meeting downstream user requirement, then basis
The data of different surface roughness measured value will adjust the related process parameters of planisher 4, until follow-up belt steel surface roughness
M meets downstream user requirement.
The wherein described surface roughness on-line detector 5 is connected in series with planisher 4, the surface roughness on-line checking
Instrument 5 is based on optical detection principle, is contactless, is located at medium position on strip width direction.
The smooth main purpose of cold-strip steel is to improve belt steel surface roughness, control panel shape and mechanical performance.Cold
During rolling belt steel flating, by imposing smaller plastic deformation (i.e. smooth elongation percentage to the strip after recrystallization annealing
ε, mostly between 0.2%~3%), the surface roughness of strip after annealing can be improved to a certain extent, eliminate to surrender and put down
Platform.When smooth elongation percentage actual value deviates elongation percentage setting value, by adjusting skin pass rolling power or smooth entrance, outlet strip
Tension can make practical elongation percentage revert to setting value.It is smooth to prolong generally, for the harder strip of thinner thickness, material
It is more sensitive to smooth tension to stretch rate, generally use adjusts smooth tensionless mode and controls elongation percentage；, material thicker for thickness compared with
Soft strip, smooth elongation percentage are more sensitive to skin pass rolling power, and generally use adjustment skin pass rolling power mode controls elongation percentage.
The surface roughness on-line detector 5 is installed on machine set outlet section, is located at after planisher 4.With to passing through
Belt steel surface roughness (including surface profile arithmetic average deviation, ten point height of nao-and micro relief etc.) after smooth processing into
The function that row detects in real time.As strip is continuously moved forward according to certain speed, can detect to obtain strip table in real time
Surface roughness value (including surface profile arithmetic average deviation Ra, ten point height R of nao-and micro reliefz, peak density PcDeng) and its edge
The situation of change in strip length direction.
According to cold-strip steel skin pass rolling theory and production practices it is found that as shown in Fig. 2, Fig. 3, Fig. 5, usually, with
Skin pass rolling power increases in a certain range, and belt steel surface profile arithmetic average error, ten point height of nao-and micro relief, peak value are close
Degree is corresponding to be increased, and vice versa.
The strategy for automatically controlling belt steel surface roughness in the present invention by adjusting flattening technological parameter refers to, when surface is thick
The belt steel surface roughness measured value m that rugosity detector 5 detectsactLess than the belt steel surface roughness desired value m of settingrefIt is super
When crossing to a certain degree, it may be preferable that by increasing skin pass rolling power, until belt steel surface roughness measured value mactClose to surface
Roughness desired value mrefUntil；As the belt steel surface roughness measured value m that surface roughness instruments 5 detectactHigher than setting
Fixed belt steel surface roughness desired value mrefMore than to a certain degree when, it may be preferable that by reduce skin pass rolling power, until strip
Surface roughness measured value mactClose to surface roughness desired value mrefUntil.
With reference to Fig. 4, the realization step and implementation method of the on-line automatic control of belt steel surface roughness are illustrated.Step
It is rapid as follows：
(1) determination of belt steel surface roughness deviation
Surface roughness instruments 5 detect obtained belt steel surface roughness measured value mactSubtract the rough surface of setting
Spend desired value mref, obtain belt steel surface roughness deviation：
△ m=mact-mref
In formula：△ m are belt steel surface roughness deviation；mrefFor the belt steel surface roughness desired value of setting, machine is come from
Group process control computer, the requirement according to downstream user to product determine.The belt steel surface roughness m is belt steel surface wheel
Wide arithmetic average deviation RaOr ten point height R of nao-and micro reliefzOr peak density Pc。
(2) skin pass rolling power regulated quantity is determined
Preferentially, it is calculated according to surface roughness deviation and determines skin pass rolling power regulated quantity, by playing skin pass rolling
Power reaches to the adjustment effect of surface roughness and smoothly eliminates belt steel surface roughness deviation in time, realizes high-precision surface
The purpose of roughness closed-loop control.
According to the belt steel surface roughness deviation △ m that step (1) determines, calculates and determine skin pass rolling power regulated quantity △ P：
△ P=Gainm_P×△m/Km_P
In formula：△ P are skin pass rolling power regulated quantity；Gainm_PFor skin pass rolling force control gain, 0<Gainm_P≤1.0；
Km_PCoefficient is influenced on belt steel surface roughness for skin pass rolling power,It is with steel material, specification and to put down
The function of whole technological parameter etc., can be calculated or be tested by theoretical model and obtain.
(3) smooth tension adjustment amount is determined
Due to adjusting skin pass rolling power, smooth elongation percentage can be caused to change, in turn result in the fluctuation of strip mechanical performance.In order to
Keep smooth elongation percentage constant so that strip mechanical performance is substantially unaffected, and it is smooth to calculate determination according to rolling force deviation value
Entrance tension adjustment amount or smooth outlet tension adjustment amount are reached by playing tension to the adjustment effect of smooth elongation percentage
While smoothly eliminating belt steel surface roughness deviation in time, realize the purpose of high-precision surface roughness closed-loop control, protect
It is constant to demonstrate,prove strip mechanical performance.
According to the skin pass rolling power regulated quantity that step (2) determines, calculates and determine smooth entrance tension adjustment amount △ T0Or
Smooth outlet tension adjustment amount △ T1：
In formula：For smooth entrance tension force gain, For smooth entrance
Power to skin pass rolling power carry-over factor,ε is smooth elongation percentage.
The smooth outlet tension adjustment amount △ T1Computational methods are as follows：
In formula：For smooth outlet tension force gain, For smooth outlet
Power to skin pass rolling power carry-over factor,ε is smooth elongation percentage.
(4) belt steel flating bending roller force regulated quantity is determined
Due to adjusting skin pass rolling power, smooth outlet belt plate shape can be caused to fluctuate.In order to keep smooth outlet band steel plate
Shape is basically unchanged, and is calculated according to rolling force deviation value and is determined smooth bending roller force regulated quantity, by playing bending roller force to smooth outlet
The adjustment effect of belt plate shape reaches and smoothly eliminates belt steel surface roughness deviation in time, realizes high-precision surface roughness
While the purpose of closed-loop control, ensure that smooth outlet belt plate shape is substantially unaffected.The leveling rolling determined according to step (2)
Power regulated quantity △ p processed calculate smooth bending roller force regulated quantity △ S：
△ S=GainP_S×△P/KP_S
In formula：GainP_SFor smooth roller force control gain, 0<GainP_S≤1.0；KP_SIt is smooth bending roller force to leveling rolling
Power carry-over factor processed,C is strip profile.
(5) determine whether belt steel flating tension adjustment amount or skin pass rolling power regulated quantity export, steps are as follows：
By the absolute value of the belt steel surface roughness deviation obtained in step (1) | △ m | it is coarse with shown belt steel surface
Spend corresponding closed-loop control threshold value △ mlimIt makes comparisons, wherein △ mlim>0。
When | △ m | >=△ mlim, step (2) adjustment belt steel flating roll-force, tension and bending roller force are gone to, and be output to flat
The corresponding executing agency of complete machine；When | △ m |<△mlimWhen, without adjusting belt steel flating roll-force, tension and bending roller force.
The line closed loop control of Cold-strip Steel Surface roughness may be implemented by the method for above-mentioned On-line Control in the present invention
System improves the control accuracy of Cold-strip Steel Surface roughness, improves product quality.
Claims (6)
1. a kind of cold-strip steel high precision plates shape surface roughness On-Line Control Method, which is characterized in that include the following steps：
S1:Calculate the measured value m of belt steel surface roughness mactWith the desired value m of belt steel surface roughnessrefBetween strip table
Surface roughness deviation △ m；
S2：Determine belt steel flating roll-force regulated quantity：
The belt steel surface roughness deviation △ m obtained according to step S1, determine belt steel flating roll-force regulated quantity △ P；
S3：Determine belt steel flating tension adjustment amount：
The belt steel flating roll-force regulated quantity △ P obtained according to step S2, determine smooth entrance tension adjustment amount △ T0Or it is flat
Whole outlet tension adjustment amount △ T1；
S4：Determine belt steel flating bending roller force regulated quantity：
The belt steel flating roll-force regulated quantity △ P obtained according to step S2, determine smooth bending roller force regulated quantity △ S；S5：Determine band
Whether steel rolling power regulated quantity exports：
By the absolute value of the belt steel surface roughness deviation obtained in step S1 | △ m | it is corresponding with belt steel surface roughness to close
Ring control threshold △ mlimIt makes comparisons, wherein △ mlim>0；
When | △ m | >=△ mlim, go to step S2 adjustment belt steel flating roll-forces；When | △ m |<△mlimWhen, without adjusting strip
Skin pass rolling power.
2. a kind of cold-strip steel high precision plates shape surface roughness On-Line Control Method according to claim 1, feature
It is, the belt steel surface roughness m is belt steel surface profile arithmetic average error RaOr ten point height R of nao-and micro reliefzOr
Peak density Pc。
3. a kind of cold-strip steel high precision plates shape surface roughness On-Line Control Method according to claim 1, feature
It is, in step S2, the belt steel flating roll-force regulated quantity △ P computational methods are as follows：
△ P=Gainm_P×△m/Km_P
In formula：Gainm_PFor skin pass rolling force control gain, 0<Gainm_P≤1.0；Km_PIt is thick to belt steel surface for skin pass rolling power
Rugosity influences coefficient, For differential operator.
4. a kind of cold-strip steel high precision plates shape surface roughness On-Line Control Method according to claim 1, feature
It is, in step S3, the smooth entrance tension adjustment amount △ T0Computational methods are as follows：
In formula：For smooth entrance tension force gain,Skin pass rolling power is transmitted for smooth entrance tension and is
Number,ε is smooth elongation percentage
The smooth outlet tension adjustment amount △ T1Computational methods are as follows：
In formula：For smooth outlet tension force gain, It is smooth outlet tension to flat
Whole roll-force carry-over factor,ε is smooth elongation percentage.
5. a kind of cold-strip steel high precision plates shape surface roughness On-Line Control Method according to claim 1, feature
It is, in step S4, the smooth bending roller force regulated quantity △ S computational methods are as follows：
△ S=GainP_S×△P/KP_S
In formula：GainP_SFor smooth roller force control gain, 0<GainP_S≤1.0；KP_SIt is smooth bending roller force to skin pass rolling power
Carry-over factor,C is strip profile.
6. a kind of cold-strip steel high precision plates shape surface roughness on-line control system, which is characterized in that including sequentially connected
Planisher and surface roughness instruments；The surface roughness instruments are used to detect the measured value of belt steel surface roughness m
mact；The planisher is used for online according to claim 1-5 any one of them cold-strip steel high precision plates shape surface roughnesses
Control method controls Cold-strip Steel Surface roughness.
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| CN109821903A (en) * | 2019-02-20 | 2019-05-31 | 攀钢集团攀枝花钢铁研究院有限公司 | The control method of high-strength steel hot rolled plate shape |
| CN110732558B (en) * | 2019-10-29 | 2020-09-08 | 燕山大学 | Online three-dimensional monitoring method for cold-rolled strip shape |
| CN113927487A (en) * | 2020-06-29 | 2022-01-14 | 宝山钢铁股份有限公司 | Online control method for surface roughness of cold-rolled strip steel |
| CN114101341B (en) * | 2021-11-16 | 2024-03-19 | 鞍钢联众(广州)不锈钢有限公司 | Method for eliminating ferrite stainless steel cold rolling yield platform |
| CN113838055B (en) * | 2021-11-29 | 2022-02-22 | 惠民万顺节能新材料有限公司 | System and method for detecting surface roughness uniformity of cold-rolled plate |
| CN114952438A (en) * | 2022-05-30 | 2022-08-30 | 首钢京唐钢铁联合有限责任公司 | Finishing manufacturing method and device for cold-rolled strip steel |
| WO2024013366A1 (en) | 2022-07-14 | 2024-01-18 | Tata Steel Ijmuiden B.V. | Method for producing cold rolled steel strip |
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