CN105268747A - Hot rolled strip convexity on-line closed loop control method - Google Patents
Hot rolled strip convexity on-line closed loop control method Download PDFInfo
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Abstract
The invention relates to a hot rolled strip convexity on-line closed loop control method. The method is characterized by comprising the following steps that (1) strip steel reaches an inlet of a finishing rolling unit, the required roll bending force set value of each rack of the finishing rolling unit is worked out through a finish rolling model according to temperature, thickness, width and materials of the strip steel and real-time roll shape of the rolls; (2) after each rack of the finishing rolling unit bites steel, the roll bending force of each rack is switched from balance force to the roll bending set value worked out through the finish rolling model; (3) during rolling of the finishing rolling unit, certain adjustment for the roll bending force is conducted according to change of the rolling force of each rack by means of the strip shape keeping function; and (4) the closed-loop control over strip steel convexity is added, during rolling of the finishing rolling unit, the adjustment value of the required roll bending force of each rack is worked out by means of a convexity-to-roll bending force conversion algorithm according to the deviation between the set value and a strip steel convexity feedback value real-timely detected by a finish rolling outlet profile gauge, the roll bending force of each rack of the finishing rolling unit is real-timely adjusted, and the closed-loop control over the strip steel convexity is achieved.
Description
Technical field
The present invention relates to a kind of closed loop control method, particularly a kind of hot rolled strip convexity line closed loop control method.
Background technology
Along with the demand in market, hot rolling enterprise is in order to realize profit, product is constantly to high-end expansion, and control of product quality precision is more and more higher, except paid close attention in the past thickness, except width control system precision, also require very strict to the Crown control precision of hot-rolled product, particularly for the high-end product such as Automobile Plate, silicon steel, it is except the control accuracy height requiring Total Product, also requires under the prerequisite that overall control accuracy is high, the homogeney of product is high, and namely control accuracy fluctuation is the smaller the better.But, the Crown control of current hot rolling enterprise strip is all realize controlling by the roll shifting (milling train had is cross roller) and roller of being with roll shape with finish rolling model, finish rolling model calculates the setting value of roll shifting amount (or angle of the crossing) and bending roller force needed for each frame of finish rolling according to being with the real-time roll shape of the supplied materials temperature of steel, thickness, width, material, roll, thus realizes the Crown control to product.So just there is following two problems, one, the control of finish rolling model to convexity is delayed.When the head Crown control of this block steel exceeds standard, it can only by optimizing bending roller force and the roll shifting position of each frame of finish rolling to the self study adjustment of next block steel, thus improve Crown control precision, this process often needs the continuous self study of several blocks of steel just can reach good effect; Two, finish rolling model is not that line closed loop controls to the control of convexity.For same steel, the bending roller force setting of model to each frame of finish rolling is disposable, can not change in the operation of rolling, to the adjustment of bending roller force be by plate shape keep function realize, namely according to the change of operation of rolling mid frame roll-force, certain adjustment is done to bending roller force, it be not the actual convexity detected with steel as a reference, facts have proved that this plate shape keeps function to the Crown control poor effect of the adjustment of bending roller force relative to band steel, even if the bending roller force of model specification makes the convexity precision of strip steel head fine, in the operation of rolling, due to strip length direction temperature, the change of the process conditions such as thickness, also afterbody convexity precision in band steel can be caused very poor.So, develop a kind of hot rolled strip convexity line closed loop control method, very necessary to the Crown control precision improving product.
Summary of the invention
The present invention, just for the technical problem existed in prior art, provides the method for a kind of hot rolled strip convexity closed-loop control, when solving this series products of rolling in current hot rolling enterprise, and the problem that product Crown control precision is not high.
To achieve these goals, the technical solution used in the present invention is as follows, a kind of hot rolled strip convexity line closed loop control method, it is characterized in that, described method step is as follows, 1) be with steel to arrive mm finishing mill unit entrance, finish rolling model calculates the bending roller force setting value needed for each frame of finish rolling according to the real-time roll shape of the temperature of band steel, thickness, width, material, roll; 2), after each frame of finish rolling stings steel, the bending roller force of each frame is switched to the roller setting value of finish rolling model calculating from equilibrant force; 3) in the mm finishing mill unit operation of rolling, plate shape keeps function to carry out certain adjustment according to the roll-force change of each frame to bending roller force; 4) closed-loop control of strip profile is increased, in the mm finishing mill unit operation of rolling, the strip profile value of feedback detected in real time according to finish rolling outlet profile gauge and the deviation of setting value, a kind of convexity is relied on to change the algorithm of bending roller force, calculate the adjusted value of bending roller force needed for each frame, the bending roller force of each frame of mm finishing mill unit is adjusted in real time, realizes the closed-loop control of strip profile.
As a modification of the present invention, in described step 4, the closed-loop control concrete grammar of strip profile is as follows,
4.1) deviation of strip profile is calculated,
The convexity setting value that model issues: Pref unit um;
The belt steel thickness setting value that model issues: Href unit mm;
Convexity setting coefficient: Pref_k unit pu;
Pref_k＝Pref/1000/Href；
Crown feedback value: Pfbk unit um;
Crown feedback coefficient: Pfbk_k unit pu;
Pfbk_k＝Pfbk/1000/Href；
Convexity deviation: Perr unit pu;
Perr＝Pref_k-Pfbk_k；
4.2) the convexity deviation that reception model issues changes the coefficient of each frame bending roller force,
The convexity deviation that model issues changes the coefficient of each frame bending roller force: F1_P_B, F2_P_B, F3_P_B, F4_P_B, F5_P_B, F6_P_B, F7_P_B unit kn/pu;
This coefficient is calculated by the assumed load of model according to the temperature being with steel at mm finishing mill unit entrance, thickness, width, material and each frame;
4.3) the adjustable coefficient of unit bending roller force is calculated;
Each frame allows maximum bending roller force: F1_Mx_B, F2_Mx_B, F3_Mx_B, F4_Mx_B, F5_Mx_B, F6_Mx_B, F7_Mx_B unit kn;
Each frame allows minimum bending roller force: F1_Min_B, F2_Min_B, F3_Min_B, F4_Min_B, F5_Min_B, F6_Min_B, F7_Min_B unit kn;
Each frame roller value of feedback: F1_B_F, F2_B_F, F3_B_F, F4_B_F, F5_B_F, F6_B_F, F7_B_F unit kn;
The adjustable coefficient of each frame bending roller force: F1_B_K, F2_B_K, F3_B_K, F4_B_K, F5_B_K, F6_B_K, F7_B_K unit pu;
F1_B_K＝CLAMP((Perr*F1_P_B)、（F1_Mx_B-F1_B_F）、（F1_Min_B-F1_B_F））/(Perr*F1_P_B)；
Annotation: the A that is meant to of CLAMP (A, B, C) function is input variable, and B is maximum, and C is minimum of a value, as C≤A≤B, function-output is A, as A < C, function-output is C, and as A > B, function-output is B;
F2_B_K, F3_B_K, F4_B_K, F5_B_K, F6_B_K, F7_B_K in like manner calculate;
The adjustable coefficient of unit bending roller force: F_B_K unit pu;
F_B_K＝CLAMP(MIN(F1_B_K、F2_B_K、F3_B_K、F4_B_K、F5_B_K、F6_B_K、F7_B_K）、1、0）；
Annotation: MIN(A, B, C, D.......) function be meant to the minimum of a value that output valve is A, B, C, D.......;
Calculating the adjustable coefficient of unit bending roller force is to ensure in strip profile closed loop control process, and the bending roller force of each frame is all adjustable, avoids occurring that individual racks bending roller force arrives maximum or minimum of a value, and the phenomenon that can not regulate;
4.4) application factor that convexity deviation changes each frame bending roller force is set;
Convexity deviation changes application factor F1_P_B_K, F2_P_B_K, F3_P_B_K, F4_P_B_K, F5_P_B_K, F6_P_B_K, F7_P_B_K unit pu of each frame bending roller force;
The application factor that convexity deviation changes each frame bending roller force is artificially set by controllers, its principle is: consider that leading portion frame is the key that strip profile controls and in maintenance, afterbody plate shape is good, therefore the setting of the coefficient of front end frame is larger, rear end frame coefficient setting is less, and its size must between 0 ~ 1; The principle of setting like this is: the Crown control mainly front end frame of band steel, and rear end frame is mainly used for controlling glacing flatness; And in belt steel rolling process, particularly thin gauge strip, is rolled down to afer bay, the thickness of band steel is very thin, easily causes belt plate shape to suddenly change, cause steel scrap if afer bay bending roller force alters a great deal;
4.5) bending roller force of each frame convexity deviation conversion is calculated;
The bending roller force of each frame convexity deviation conversion: F1_err, F2_err, F3_err, F4_err, F5_err, F6_err, F7_err unit kn;
F1_err＝Perr*F1_P_B*F_B_K*F1_P_B_K；
F2_err, F3_err, F4_err, F5_err, F6_err, F7_err in like manner calculate;
4.6) each frame convexity closed loop bending roller force adjustment amount is calculated;
Each frame convexity closed loop bending roller force adjustment amount: F1_P_Cor, F2_P_Cor, F3_P_Cor, F4_P_Cor, F5_P_Cor, F6_P_Cor, F7_P_Cor unit kn;
F1_P_Cor=F1_P_Cor+F1_err, annotation: convexity closed loop bending roller force adjustment amount sum equation;
Strip profile closed-loop control is: band steel exports profile gauge time delay after 4 seconds by mm finishing mill unit, time delay 4 seconds is because strip steel head easily works instability of wafing, convexity detects inaccurate, avoid the adjustment of mistake, profile gauge detects the crown feedback of band steel, calculate the deviation of strip profile and the bending roller force of each frame convexity deviation conversion, and in the operation of rolling afterwards, periodically read a profile gauge every 2 seconds and the crown feedback being with steel detected, periodically calculate the deviation of strip profile and the bending roller force of each frame convexity deviation conversion, so, the bending roller force of each frame convexity deviation conversion calculated once every 2 seconds, each frame convexity closed loop bending roller force adjustment amount accumulated once every 2 seconds, until each frame throws steel, the convexity closed-loop control of corresponding frame terminates, and each frame convexity closed loop bending roller force adjustment amount is reset,
F2_P_Cor, F3_P_Cor, F4_P_Cor, F5_P_Cor, F6_P_Cor, F7_P_Cor in like manner calculate.
Relative to prior art, advantage of the present invention is as follows, this invention exploits a kind of strip profile closed loop control method, in the mm finishing mill unit operation of rolling, according to the strip profile value of feedback that profile gauge detects, calculate the deviation with convexity setting value in real time, periodically, and calculate the bending roller force adjusted value required for change convexity deviation corresponding to each frame of finish rolling by a kind of specific algorithm, constantly change each frame bending roller force, thus realize the closed-loop control of strip profile; This invention technology is compared with original technology, changing strip profile can not closed-loop control, the defect of Crown control low precision, especially when production phosphorus content is low, band structure of steel just enters ferrite area in finish rolling leading portion frame, and along with intermediate blank temperature reduces, roll-force progressively reduces on the contrary, and SM function reduces bending roller force before adopting, the convexity of product can be made to reduce.By application and the enforcement of convexity Closed loop Control of Crown control theory, achieve and carry out according to the deviation of strip profile the bending roller force that closed loop adjusts each frame, thus substantially increase the Crown control precision of band steel, especially low-carbon (LC) and ultra-low-carbon steel can be met, product quality demand as high-end in Automobile Plate, silicon steel etc., for the profit of enterprise provides technical guarantee.
Accompanying drawing explanation
Fig. 1 is Crown control flow chart of the present invention.
Detailed description of the invention
In order to deepen the understanding of the present invention and understanding, below in conjunction with accompanying drawing, the invention will be further described and introduce.
embodiment 1: see Fig. 1, a kind of hot rolled strip convexity line closed loop control method, to produce thickness Href=2.5mm, the band steel of convexity setting value Pref=20um is example:
1, be with steel to arrive mm finishing mill unit entrance, finish rolling model calculates the bending roller force setting value needed for each frame of finish rolling according to the real-time roll shape of the temperature of band steel, thickness, width, material, roll.The roller setting value of F1 ~ 7 frame: 850kn, 670kn, 950kn, 540kn, 640kn, 720kn, 814kn;
2, after each frame of finish rolling stings steel, the bending roller force of each frame is switched to the roller setting value of finish rolling model calculating from equilibrant force;
The bending roller force of F1 ~ 7 frame is switched to roller setting value from stable equilibrium power 800kn, and the bending roller force value of feedback of each frame is setting value: F1_B_F=850kn, F2_B_F=670kn, F3_B_F=950kn, F4_B_F=540kn, F5_B_F=640kn, F6_B_F=720kn, F7_B_F=814kn
3, in the mm finishing mill unit operation of rolling, plate shape keeps function to carry out certain adjustment according to the roll-force change of each frame to bending roller force;
In the mm finishing mill unit operation of rolling, under plate shape keeps function, the bending roller force of each frame changes with the change of frame roll-force, roll-force increases, bending roller force increases, roll-force reduces bending roller force and reduces, that is: plate shape keeps the adjustment amount of function to bending roller force to be increase with roll-force and increase, reduce with roll-force and reduce, it does not change with the change of error of strip profile value of feedback and desired value, and the theory that bending roller force controls strip profile is: crown feedback value is less than desired value, need to increase bending roller force, crown feedback value is greater than desired value, need to reduce bending roller force, so, plate shape keeps function to there is contrary situation theoretical with Crown control to the adjustment amount of bending roller force, the defect that plate shape maintenance function that Here it is exists Crown control.
4, strip profile closed-loop control:
4.1, strip profile deviation is calculated:
Convexity setting FACTOR P ref_k=Pref/1000/Href=20/1000/2.5=0.008
The strip profile value of feedback that first time detects is: Pfbk=30um
Crown feedback FACTOR P fbk_k=Pfbk/1000/Href=30/1000/2.5=0.012
Convexity deviation Perr=Pref_k-Pfbk_k=0.008-0.012=-0.004
4.2, the convexity deviation that reception model issues changes the coefficient of each frame bending roller force
Receive model to change the coefficient of each frame bending roller force according to band steel in the convexity deviation that the carry calculation of the temperature of finish rolling entrance, thickness, material and each frame draws (this coefficient is calculated by model, the data that every block steel calculates are all different, are not explained in detail herein):
F1_P_B＝316821、F2_P_B＝272216、F3_P_B＝228111
F4_P_B＝184563、F5_P_B＝144704、F6_P_B＝131925、F7_P_B＝91849
4.3, the adjustable coefficient of unit bending roller force is calculated
Each frame allows maximum bending roller force: F1_Mx_B=F2_Mx_B=F3_Mx_B=F4_Mx_B=F5_Mx_B=F6_Mx_B=F7_Mx_B=2140kn
Each frame allows minimum bending roller force: F1_Min_B=F2_Min_B=F3_Min_B=F4_Min_B=F5_Min_B, F6_Min_B=F7_Min_B=200kn
Each frame roller value of feedback:
F1_B_F＝850kn、F2_B_F＝670kn、F3_B_F＝950kn
F4_B_F＝540kn、F5_B_F＝640kn、F6_B_F＝720kn、F7_B_F＝814kn
The adjustable coefficient of each frame bending roller force:
F1_B_K＝CLAMP((Perr*F1_P_B)、（F1_Mx_B-F1_B_F）、（F1_Min_B-F1_B_F））/(Perr*F1_P_B)
＝CLAMP((-0.004*316821)、（2140-850）、（200-850））/(-0.004*316821)
＝CLAMP(-1267.284、1290、-650）/(-1267.284)
＝（-650）/(-1267.284)
＝0.5129
In like manner calculate:
F2_B_K=0.4316、F3_B_K=0.8219、F4_B_K=0.4605
F5_B_K＝0.7601、F6_B_K＝0.9854、F7_B_K＝1.6712
The adjustable coefficient of unit bending roller force:
F_B_K＝CLAMP(MIN(F1_B_K、F2_B_K、F3_B_K、F4_B_K、F5_B_K、F6_B_K、F7_B_K）、1、0）
＝CLAMP(MIN(0.5129、0.4316、0.8219、0.4605、0.7601、0.9854、1.6712）、1、0）
＝CLAMP(0.4316、1、0）
＝0.4316
4.4, the application factor that convexity deviation changes each frame bending roller force is set
Convexity deviation changes the application factor of each frame bending roller force:
F1_P_B_K＝0.85、F2_P_B_K＝0.65、F3_P_B_K＝0.55
F4_P_B_K＝0.45、F5_P_B_K＝0.35、F6_P_B_K＝0.3、F7_P_B_K＝0.25
4.5, each frame bending roller force of convexity deviation conversion is calculated:
Each frame bending roller force of convexity deviation conversion:
F1_err＝Perr*F1_P_B*F_B_K*F1_P_B_K
＝-0.004*316821*0.4316*0.85
＝-464.9kN
In like manner calculate:
F2_err＝-305.4kN、F3_err＝-216.5kN、F4_err＝-143.3kN
F5_err＝-87.4kN、F6_err＝-68.3kN、F7_err＝-39.6kN
4.6, each frame convexity closed loop bending roller force adjustment amount is calculated
Because this calculates each frame convexity closed loop bending roller force adjustment amount, so the initial value of F1_P_Cor, F2_P_Cor, F3_P_Cor, F4_P_Cor, F5_P_Cor, F6_P_Cor, F7_P_Cor is 0 at first time
F1_P_Cor＝F1_P_Cor＋F1_err
＝0＋-305.4
＝-305.4kN
In like manner calculate:
F2_P_Cor＝-305.4kN、F3_P_Cor＝-216.5kN、F4_P_Cor＝-143.3kN
F5_P_Cor＝-87.4kN、F6_P_Cor＝-68.3kN、F7_P_Cor＝-39.6kN
Result of calculation according to each frame bending roller force adjustment amount of above-mentioned convexity closed-loop control calculating draws: when the crown feedback of band steel is 30um, when being greater than convexity desired value 20um, the bending roller force regulated quantity of F1 ~ 7 frame is all negative value;
In like manner: according to bending roller force regulated quantity computing formula: Perr*F1_P_B*F_B_K*F1_P_B_K, when strip profile feedback is less than convexity desired value, convexity deviation Perr become on the occasion of, and, the application factor F1_P_B_K that the convexity deviation that model issues changes coefficient F1_P_B, the unit bending roller force adjustable coefficient F_B_K of each frame bending roller force, convexity deviation changes each frame bending roller force all permanent on the occasion of, so, the bending roller force regulated quantity of F1 ~ 7 frame be also on the occasion of.
So the adjustment amount of each frame bending roller force that convexity closed-loop control calculates meets the theory that bending roller force controls strip profile: crown feedback value is less than desired value, need to increase bending roller force, crown feedback value is greater than desired value, needs reduction bending roller force.And be adjustment aim according to convexity deviation.
Be separated by 2 seconds later, convexity closed-loop control is according to the strip profile value of feedback of profile gauge detection at that time, repeat the calculation procedure of above 1 ~ 5, calculate each frame bending roller force of convexity deviation conversion at that time, and calculate each frame convexity closed loop bending roller force adjustment amount according to the totalization formula of step 6, until each frame throws steel, the convexity closed-loop control of corresponding frame terminates, and each frame convexity closed loop bending roller force adjustment amount is reset, wait in next block belt steel rolling process and recalculating.
It should be noted that above-described embodiment, be not used for limiting protection scope of the present invention, equivalents done on the basis of technique scheme or the alternative scope all falling into the claims in the present invention and protect.
Claims (2)
1. a hot rolled strip convexity line closed loop control method, it is characterized in that, described method step is as follows, 1) band steel arrives mm finishing mill unit entrance, and finish rolling model calculates the bending roller force setting value needed for each frame of finish rolling according to the real-time roll shape of the temperature of band steel, thickness, width, material, roll; 2), after each frame of finish rolling stings steel, the bending roller force of each frame is switched to the roller setting value of finish rolling model calculating from equilibrant force; 3) in the mm finishing mill unit operation of rolling, plate shape keeps function to carry out certain adjustment according to the roll-force change of each frame to bending roller force; 4) closed-loop control of strip profile is increased, in the mm finishing mill unit operation of rolling, the strip profile value of feedback detected in real time according to finish rolling outlet profile gauge and the deviation of setting value, a kind of convexity is relied on to change the algorithm of bending roller force, calculate the adjusted value of bending roller force needed for each frame, the bending roller force of each frame of mm finishing mill unit is adjusted in real time, realizes the closed-loop control of strip profile.
2. a kind of hot rolled strip convexity line closed loop control method as claimed in claim 1, it is characterized in that, in described step 4, the closed-loop control concrete grammar of strip profile is as follows,
4.1) deviation of strip profile is calculated,
The convexity setting value that model issues: Pref unit um;
The belt steel thickness setting value that model issues: Href unit mm;
Convexity setting coefficient: Pref_k unit pu;
Pref_k＝Pref/1000/Href；
Crown feedback value: Pfbk unit um;
Crown feedback coefficient: Pfbk_k unit pu;
Pfbk_k＝Pfbk/1000/Href；
Convexity deviation: Perr unit pu;
Perr＝Pref_k-Pfbk_k；
4.2) the convexity deviation that reception model issues changes the coefficient of each frame bending roller force,
The convexity deviation that model issues changes the coefficient of each frame bending roller force: F1_P_B, F2_P_B, F3_P_B, F4_P_B, F5_P_B, F6_P_B, F7_P_B unit kn/pu;
This coefficient is calculated by the assumed load of model according to the temperature being with steel at mm finishing mill unit entrance, thickness, width, material and each frame;
4.3) the adjustable coefficient of unit bending roller force is calculated;
Each frame allows maximum bending roller force: F1_Mx_B, F2_Mx_B, F3_Mx_B, F4_Mx_B, F5_Mx_B, F6_Mx_B, F7_Mx_B unit kn;
Each frame allows minimum bending roller force: F1_Min_B, F2_Min_B, F3_Min_B, F4_Min_B, F5_Min_B, F6_Min_B, F7_Min_B unit kn;
Each frame roller value of feedback: F1_B_F, F2_B_F, F3_B_F, F4_B_F, F5_B_F, F6_B_F, F7_B_F unit kn;
The adjustable coefficient of each frame bending roller force: F1_B_K, F2_B_K, F3_B_K, F4_B_K, F5_B_K, F6_B_K, F7_B_K unit pu;
F1_B_K＝CLAMP((Perr*F1_P_B)、（F1_Mx_B-F1_B_F）、（F1_Min_B-F1_B_F））/(Perr*F1_P_B)；
Annotation: the A that is meant to of CLAMP (A, B, C) function is input variable, and B is maximum, and C is minimum of a value, as C≤A≤B, function-output is A, as A < C, function-output is C, and as A > B, function-output is B;
F2_B_K, F3_B_K, F4_B_K, F5_B_K, F6_B_K, F7_B_K in like manner calculate;
The adjustable coefficient of unit bending roller force: F_B_K unit pu;
F_B_K＝CLAMP(MIN(F1_B_K、F2_B_K、F3_B_K、F4_B_K、F5_B_K、F6_B_K、F7_B_K）、1、0）；
Annotation: MIN(A, B, C, D.......) function be meant to the minimum of a value that output valve is A, B, C, D.......;
Calculating the adjustable coefficient of unit bending roller force is to ensure in strip profile closed loop control process, and the bending roller force of each frame is all adjustable, avoids occurring that individual racks bending roller force arrives maximum or minimum of a value, and the phenomenon that can not regulate;
4.4) application factor that convexity deviation changes each frame bending roller force is set;
Convexity deviation changes application factor F1_P_B_K, F2_P_B_K, F3_P_B_K, F4_P_B_K, F5_P_B_K, F6_P_B_K, F7_P_B_K unit pu of each frame bending roller force;
The application factor that convexity deviation changes each frame bending roller force is artificially set by controllers, its principle is: consider that leading portion frame is the key that strip profile controls and in maintenance, afterbody plate shape is good, therefore the setting of the coefficient of front end frame is larger, rear end frame coefficient setting is less, and its size must between 0 ~ 1; The principle of setting like this is: the Crown control mainly front end frame of band steel, and rear end frame is mainly used for controlling glacing flatness; And in belt steel rolling process, particularly thin gauge strip, is rolled down to afer bay, the thickness of band steel is very thin, easily causes belt plate shape to suddenly change, cause steel scrap if afer bay bending roller force alters a great deal;
4.5) bending roller force of each frame convexity deviation conversion is calculated;
The bending roller force of each frame convexity deviation conversion: F1_err, F2_err, F3_err, F4_err, F5_err, F6_err, F7_err unit kn;
F1_err＝Perr*F1_P_B*F_B_K*F1_P_B_K；
F2_err, F3_err, F4_err, F5_err, F6_err, F7_err in like manner calculate;
4.6) each frame convexity closed loop bending roller force adjustment amount is calculated;
Each frame convexity closed loop bending roller force adjustment amount: F1_P_Cor, F2_P_Cor, F3_P_Cor, F4_P_Cor, F5_P_Cor, F6_P_Cor, F7_P_Cor unit kn;
F1_P_Cor=F1_P_Cor+F1_err, annotation: convexity closed loop bending roller force adjustment amount sum equation;
Strip profile closed-loop control is: band steel exports profile gauge time delay after 4 seconds by mm finishing mill unit, profile gauge detects the crown feedback of band steel, calculate the deviation of strip profile and the bending roller force of each frame convexity deviation conversion, and in the operation of rolling afterwards, periodically read a profile gauge every 2 seconds and the crown feedback being with steel detected, periodically calculate the deviation of strip profile and the bending roller force of each frame convexity deviation conversion, so, the bending roller force of each frame convexity deviation conversion calculated once every 2 seconds, each frame convexity closed loop bending roller force adjustment amount accumulated once every 2 seconds, until each frame throws steel, the convexity closed-loop control of corresponding frame terminates, and each frame convexity closed loop bending roller force adjustment amount is reset,
F2_P_Cor, F3_P_Cor, F4_P_Cor, F5_P_Cor, F6_P_Cor, F7_P_Cor in like manner calculate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410297832.4A CN105268747B (en) | 2014-06-29 | 2014-06-29 | Hot rolled strip convexity on-line closed loop control method |
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| CN106475421A (en) * | 2016-09-30 | 2017-03-08 | 首钢总公司 | A kind of control method of middle base supplied materials convexity and device |
| CN110624959A (en) * | 2019-09-30 | 2019-12-31 | 攀钢集团西昌钢钒有限公司 | Leveling method for improving side bending defect of hot-rolled high-strength strip steel |
| CN111229838A (en) * | 2018-11-28 | 2020-06-05 | 上海梅山钢铁股份有限公司 | Method for solving wave shape between frames through proportional convexity change coefficient |
| CN111250551A (en) * | 2020-01-15 | 2020-06-09 | 首钢京唐钢铁联合有限责任公司 | Method and system for controlling bending force of finishing machine |
| CN112007957A (en) * | 2019-05-30 | 2020-12-01 | 上海梅山钢铁股份有限公司 | Self-learning control method for comprehensive convexity compensation of hot-rolled finishing roll system |
| CN112439791A (en) * | 2019-08-29 | 2021-03-05 | 宝山钢铁股份有限公司 | Thickness control method in finish rolling threading process |
| CN113020284A (en) * | 2021-03-18 | 2021-06-25 | 鞍钢股份有限公司 | Method for controlling convexity of hot-rolled raw plate for cold rolling galvanization |
| CN114798729A (en) * | 2022-03-15 | 2022-07-29 | 宝信软件(山西)有限公司 | Real-time screw-down adjusting device of finishing mill and control method |
| CN115007657A (en) * | 2022-06-17 | 2022-09-06 | 首钢智新迁安电磁材料有限公司 | Control method of strip steel rolling equipment |
| CN115213236A (en) * | 2021-04-21 | 2022-10-21 | 宝山钢铁股份有限公司 | Edge roll-bending-reducing control method and system |
| CN115415331A (en) * | 2022-10-10 | 2022-12-02 | 日照钢铁控股集团有限公司 | Hot continuous rolling stand outlet strip steel convexity distribution method, system and computing terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106475421A (en) * | 2016-09-30 | 2017-03-08 | 首钢总公司 | A kind of control method of middle base supplied materials convexity and device |
| CN106475421B (en) * | 2016-09-30 | 2019-02-22 | 首钢集团有限公司 | A kind of control method and device of intermediate base supplied materials convexity |
| CN111229838B (en) * | 2018-11-28 | 2021-07-09 | 上海梅山钢铁股份有限公司 | Method for solving wave shape between frames through proportional convexity change coefficient |
| CN111229838A (en) * | 2018-11-28 | 2020-06-05 | 上海梅山钢铁股份有限公司 | Method for solving wave shape between frames through proportional convexity change coefficient |
| CN112007957A (en) * | 2019-05-30 | 2020-12-01 | 上海梅山钢铁股份有限公司 | Self-learning control method for comprehensive convexity compensation of hot-rolled finishing roll system |
| CN112439791A (en) * | 2019-08-29 | 2021-03-05 | 宝山钢铁股份有限公司 | Thickness control method in finish rolling threading process |
| CN112439791B (en) * | 2019-08-29 | 2022-11-18 | 宝山钢铁股份有限公司 | Thickness control method in finish rolling threading process |
| CN110624959B (en) * | 2019-09-30 | 2021-04-27 | 攀钢集团西昌钢钒有限公司 | Leveling method for improving side bending defect of hot-rolled high-strength strip steel |
| CN110624959A (en) * | 2019-09-30 | 2019-12-31 | 攀钢集团西昌钢钒有限公司 | Leveling method for improving side bending defect of hot-rolled high-strength strip steel |
| CN111250551A (en) * | 2020-01-15 | 2020-06-09 | 首钢京唐钢铁联合有限责任公司 | Method and system for controlling bending force of finishing machine |
| CN113020284A (en) * | 2021-03-18 | 2021-06-25 | 鞍钢股份有限公司 | Method for controlling convexity of hot-rolled raw plate for cold rolling galvanization |
| CN115213236A (en) * | 2021-04-21 | 2022-10-21 | 宝山钢铁股份有限公司 | Edge roll-bending-reducing control method and system |
| CN114798729A (en) * | 2022-03-15 | 2022-07-29 | 宝信软件(山西)有限公司 | Real-time screw-down adjusting device of finishing mill and control method |
| CN115007657A (en) * | 2022-06-17 | 2022-09-06 | 首钢智新迁安电磁材料有限公司 | Control method of strip steel rolling equipment |
| CN115415331A (en) * | 2022-10-10 | 2022-12-02 | 日照钢铁控股集团有限公司 | Hot continuous rolling stand outlet strip steel convexity distribution method, system and computing terminal |
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