CN106216409A - The establishing method of a kind of six-roll cold mill bending roller force and device - Google Patents

The establishing method of a kind of six-roll cold mill bending roller force and device Download PDF

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CN106216409A
CN106216409A CN201610637531.0A CN201610637531A CN106216409A CN 106216409 A CN106216409 A CN 106216409A CN 201610637531 A CN201610637531 A CN 201610637531A CN 106216409 A CN106216409 A CN 106216409A
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bending roller
roller force
roll
model
unit
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梁勋国
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CISDI Engineering Co Ltd
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CISDI Engineering Co Ltd
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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

Abstract

The present invention provides establishing method and the device of a kind of six-roll cold mill bending roller force, belong to Strip cold rolling technology field, the method comprise the steps that the acquisition device parameter of six-roll cold mill, band parameter and rolling technological parameter, and be inputted in bending roller force setting model, it is calculated the optimal bending roller force setting value of working roll and intermediate calender rolls respectively, and is exported；Optimal bending roller force setting value can be exported according to bending roller force setting model by said method, the present invention analyses in depth the physical relation between various influence factors and optimal bending roller force based on plate shape mechanism model, device parameter according to milling train determines mathematical relationship clear and definite between intermediate calender rolls bending roller force and work roll bending power, theorize rigorous, explicit physical meaning, fast and reliable, the most reasonably six-roll cold mill bending roller force setting model, and improve setup algorithm precision further by model adaptation, it is ensured that the strip shape quality that product is good.

Description

The establishing method of a kind of six-roll cold mill bending roller force and device
Technical field
The present invention relates to Strip cold rolling technology field, relate to a kind of six-roll cold mill bending roller force based on mechanism model Setting technique.
Background technology
Fig. 1 is the schematic diagram of six-roll cold mill, this six-roll cold mill include working roll 2 (the most each 1), intermediate calender rolls 3 (on Under each 1) and support roller 4 (the most each 1), roll roller includes that intermediate calender rolls roller and work roll bending, usual working roll have Positive and negative roller function, intermediate calender rolls has positive roller function, the effect of bending roller force setting model be exactly before every coiled strip steel 1 rolls to Go out the most reasonably work roll bending power and intermediate calender rolls bending roller force setting value.
Fig. 2 is that the production technology and equipments of the five frame six roller tandem mills being most widely used at present arranges signal Figure, band 1 is sent to inlet of rolling mill after uncoiler 5 uncoiling, and the rolling through five six-roll cold mills reaches the thickness of regulation Rear and be sent to coiling machine 6 and batch.For five frame six roller tandem mills, the setting of bending roller force includes that 1# frame works Roll bending power and intermediate calender rolls bending roller force, 2# frame work roll bending power and intermediate calender rolls bending roller force, 3# frame work roll bending power and Intermediate calender rolls bending roller force, 4# frame work roll bending power and intermediate calender rolls bending roller force, 5# frame work roll bending power and intermediate calender rolls roller Power；The i.e. setting of bending roller force is for single six-roll cold mill, and in the equipment including multiple six-roll cold mill, it is the most right to need The bending roller force of each six-roll cold mill is set.
At present, the establishing method of six-roll cold mill bending roller force predominantly organic reason model and empirical model two kinds.
Mechanism model is theoretical based on roll elastic deformation and metal plastic deformation is theoretical, by by the plastic deformation of band Being coupled together with Determination of Elastic Deformation of Roll System, the ratio convexity with band inlet/outlet is equal or rolls rear band horizontal residual stress and divides Cloth is uniformly the bending roller force that object solving is optimal.Mechanism model needs substantial amounts of iterative computation, and computationally intensive, speed is slow, calculate Time is long, and model there is likely to be the situation that iteration does not restrains in some cases；And, calculating process needs accurately to know and rolls The transverse gage distribution of machine entrance raw material strip or strip crown value accurately, this is difficult to obtain in actual production.Therefore, Such setting model is the best at practical application effect.
Empirical model is typically all based on theoretical analysis result or the experience of people, is returned by data statistic analysis, mathematics The method returned is to set up setup algorithm model, and this class model has the features such as form is simple, easily realize, calculating speed is fast.Mesh Before the empirical model that is applied various informative, but be the most all the experience intuition according to people, determine that several key factor is to curved After the impact of roller power, certain data are used to carry out returning using as setting model, in these models, nearly all by roller Relation between power and other influences factor treats as simple linear relationship, and physical significance is indefinite, it is impossible to disclose roller very well Inherent physical relation between power and each influence factor, the ginseng that some even cannot be obtained in actual production by some empirical model Number is as variable so that the error calculated of model is very big, and application effect is the most undesirable；And in these models, be all by Work roll bending power and intermediate calender rolls bending roller force carry out setup algorithm respectively as independent variable, and do not account for both Internal relation, not only increase the difficulty of model debugging and model maintenance, simultaneously reasonability and the essence to model specification result Degree all creates the biggest impact.
In a word, in existing bending roller force setting model between bending roller force and other influences factor and intermediate calender rolls bending roller force and Physical relation between work roll bending power is inaccurate, and lacks the most rigorous mathematical expression so that it is imitate in actual applications The most unsatisfactory.
Summary of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of six-roll cold mill bending roller force Establishing method and device, for solving existing bending roller force setting model owing to lacking certain reliability and accuracy and then making it The problem of poor effect in actual applications.
For achieving the above object and other relevant purposes, the present invention provides techniques below scheme:
The establishing method of a kind of six-roll cold mill bending roller force, obtains the device parameter of six-roll cold mill, band parameter and rolls Technological parameter processed；By in described device parameter, band parameter and rolling technological parameter input bending roller force setting model, calculate respectively Obtain the optimal bending roller force setting value of working roll and intermediate calender rolls, and exported.
In a preferred embodiment, above-mentioned bending roller force setting model includes work roll bending power setting model and middle roll bending Roller power setting model, wherein, described work roll bending power setting model is:
FW=(c0+c1DW+c2DW 2+c3CW+c4CW 2+c5δ+c6δ2+c7p+c8p2)·(c9+c10B+c11B2)；
Wherein, c0～c11For model coefficient；DWFor working roll radius, unit is mm；CWFor work roll crown, unit is mm； δ is middle roll shift position, and unit is mm；P is unit width roll-force, and unit is kN/mm；B is strip width, and unit is mm；
Described intermediate calender rolls bending roller force setting model is: FI=(a0+a1B+a2B2+a3B3)FW；Wherein, FIFor intermediate calender rolls roller Power, unit is kN；B is strip width, and unit is mm；a0～a3For model coefficient.
Specifically, the foundation of above-mentioned work roll bending power setting model and intermediate calender rolls bending roller force setting model can by with Lower method realizes:
First, determine the parameter for simulation analysis
Determine the parameter using plate shape mechanism model to carry out simulation analysis, including:
1) device parameter of six-roll cold mill: work roll diameter DW, working roll barrel length LW, working roller bending hydraulic cylinder Centre-to-centre spacing dW, working roll elastic modulus EW, working roll Poisson's ratio vW, initial convexity C of working rollW, intermediate calender rolls diameter DI, intermediate calender rolls roller Body length LI, intermediate calender rolls bowed roller hydraulic cylinder centre-to-centre spacing dI, intermediate calender rolls elastic modulus EI, intermediate calender rolls Poisson's ratio vI, intermediate calender rolls is the most convex Degree CI, support roller diameter DB, support roller barrel length LB, support roll bending hydraulic cylinder centre-to-centre spacing dB, support roller elastic modulus EB, Support roller Poisson's ratio vB, support initial convexity C of rollerB；
2) band parameter: width B, ingoing ga(u)ge H, outgoing gauge h, initial convexity C of bandS, band elastic modulus ES, band Material Poisson's ratio vS；
3) rolling technological parameter: middle roll shift position initial value δ0, work roll bending power initial value FW0, intermediate calender rolls roller Power initial value FI0, special rolling force initial value p0, front tensile stress initial value tf0, rear tensile stress initial value tb0。
Second, determine the relation of optimal bending roller force and various major influence factors
Determine the relation of optimal bending roller force and various major influence factors, i.e. utilize six rollers based on influence function method cold rolling Machine plate shape mechanism model (including roll elastic deformation model and metal plastic deformation model, calculation process is as shown in Figure 3) divides Analysis includes strip width, roller diameter (working roll, intermediate calender rolls and support roller), roll crown (working roll, intermediate calender rolls and support Roller), band convexity, front tensile stress, rear tensile stress, middle roll shift position, the factor such as special rolling force and optimal roller The relation of power, step includes:
1) plate shape mechanism model is used to analyze when optimal bending roller force changes with work roll diameter and the relation of strip width, its In, optimal bending roller force calculation flow chart is referred to Fig. 4, finally determines between optimal bending roller force and work roll diameter and strip width There is obvious non-linear relation, may be used to lower formula and represent:
F = ( c R w 0 + c R w 1 R W + c R w 2 · R W 2 ) · ( b 0 + b 1 B + b 2 B 2 ) ;
2) plate shape mechanism model is used to analyze when optimal bending roller force changes with intermediate calender rolls diameter and the relation of strip width, Determine the linear relationship that there is approximation between optimal bending roller force and intermediate calender rolls diameter eventually, but and exist the most non-between strip width Linear relationship, may be used to lower formula and represents:
F=(cRi0+cRi1RI)·(b0+b1B+b2B2)；
3) plate shape mechanism model is used to analyze when optimal bending roller force changes with support roller diameter and the relation of strip width, Determine optimal bending roller force eventually and support the linear relationship that there is approximation between roller diameter, but and existing the most non-between strip width Linear relationship, may be used to lower formula and represents:
F=(cRb0+cRb1RB)·(b0+b1B+b2B2)；
4) plate shape mechanism model is used to analyze when optimal bending roller force changes with work roll crown and the relation of strip width, Determine eventually and there is non-linear relation between optimal bending roller force and work roll crown and strip steel, may be used to lower formula and represent:
F = ( c C w 0 + c C w 1 C W + c C w 2 C W 2 ) · ( b 0 + b 1 B + b 2 B 2 ) ;
5) plate shape mechanism model is used to analyze when optimal bending roller force changes with intermediate calender rolls convexity and the relation of strip width, Determine eventually and there is non-linear relation between optimal bending roller force and intermediate calender rolls convexity and strip steel, may be used to lower formula and represent:
F = ( c C i 0 + c C i 1 C I + c C i 2 C I 2 ) · ( b 0 + b 1 B + b 2 B 2 ) ;
6) plate shape mechanism model is used to analyze when optimal bending roller force changes with support roll crown and the relation of strip width, Determine optimal bending roller force eventually and support the linear relationship presenting approximation between roll crown, but and between strip steel, there is nonlinear dependence System, may be used to lower formula and represents:
F=(cCb0+cCb1CB)·(b0+b1B+b2B2)；
7) plate shape mechanism model is used to analyze when optimal bending roller force changes and the pass of strip width with band access panel convexity System, finally determines and all there is non-linear relation between optimal bending roller force and band entrance convexity and strip width, may be used to lower formula Represent:
F = ( c C s 0 + c C s 1 C S + c C s 2 C S 2 ) · ( b 0 + b 1 B + b 2 B 2 ) ;
8) use plate shape mechanism model analyze optimal bending roller force with during front tensile stress variations with the relation of strip width, finally Determine and between optimal bending roller force and front tensile stress and strip width, all there is non-linear relation, may be used to lower formula and represent:
F = ( c t f 0 + c t f 1 T f + c t f 2 T f 2 ) · ( b 0 + b 1 B + b 2 B 2 ) ;
9) with the relation of strip width when using plate shape mechanism model to analyze optimal bending roller force tensile stress variations subsequently, finally Determine and between optimal bending roller force and rear tensile stress and strip width, all there is non-linear relation, may be used to lower formula and represent:
F = ( c t b 0 + c t b 1 T b + c t b 2 T b 2 ) · ( b 0 + b 1 B + b 2 B 2 ) ;
10) plate shape mechanism model is used to analyze optimal bending roller force with during middle roll shift change in location and the pass of strip width System, finally determines and all there is non-linear relation between optimal bending roller force and middle roll shift position and strip width, may be used to following formula Son represents:
F=(cs0+cs1δ+cs2δ2)·(b0+b1B+b2B2)；
11) plate shape mechanism model is used to analyze when optimal bending roller force changes and the pass of strip width with special rolling force System, finally determines and all there is non-linear relation between optimal bending roller force and special rolling force and strip width, may be used to following formula Son represents:
F=(cp0+cp1p+cp2p2)·(b0+b1B+b2B2)。
Comprehensive above 1) analysis result-11), intermediate calender rolls diameter and support roller diameter on the impact of optimal bending roller force relatively Little, front and back tensile stress affects bending roller force by influence of rolled power, therefore can ignore；For six-roll cold mill, intermediate calender rolls and Supporting roller and generally use flat rolling, its convexity is zero；Band entrance convexity is bigger on the impact of bending roller force, it is contemplated that actual raw In product, generally cannot survey the strip crown size of supplied materials, thus by its on the impact of bending roller force (and other immeasurability because of Element) comprehensive consideration in the constant term of model, therefore the setting model of optimal bending roller force is represented by:
FW=(c0+c1DW+c2DW 2+c3CW+c4CW 2+c5δ+c6δ2+c7p+c8p2)·(c9+c10B+c11B2)。
3rd, determine the relation of optimal intermediate calender rolls bending roller force and best effort roll bending power
Six-roll cold mill plate shape mechanism model is utilized to analyze between optimal intermediate calender rolls bending roller force and best effort roll bending power The functional relationship determined, there is obvious non-linear relation with strip width, can be expressed as in it:
FI=(a0+a1B+a2B2+a3B3)FW。
4th, the determination of bending roller force setting model coefficient
Determine the coefficient of bending roller force setting model, including: (1) six-roll cold mill is divided into 1200mm, 1450mm, Four series such as 1700mm, 2030mm, use the actual measurement bending roller force data of corresponding milling train, through screening, process, will not meet and want After the bad data asked is rejected, determine work roll bending power setting model coefficient c by the method for mathematical regression0～c11；(2) use The relevant device parameter of six-roll cold mill and the parameter of institute's rolled strip, according to the result of calculation of plate shape mechanism model, pass through back Intermediate calender rolls bending roller force setting model coefficient a is determined after returning process0～a3。
5th, calculate bending roller force setting value according to device parameter, band parameter and the rolling technological parameter of six-roll cold mill
Determine that the work roll bending power setting model obtained and intermediate calender rolls bending roller force setting model i.e. can be counted according to above-mentioned Calculate the optimal bending roller force of six-roll cold mill.
Concrete, the input device parameter of six-roll cold mill, band parameter and rolling technological parameter calculate bending roller force and set Value, specifically may include that work roll diameter, work roll crown, middle roll shift position, strip width, rolling force setup value.So After be calculated the optimal bending roller force of six-roll cold mill by above-mentioned model.
6th, by model adaptation, improve model specification precision
On the basis of the work roll bending power setting model obtained in above-mentioned foundation and intermediate calender rolls bending roller force setting model, also may be used To be improved the setup algorithm precision of model further by self adaptation.
Concrete, use actual measurement bending roller force, improved the precision of model specification result of calculation by model adaptation, specifically Implementation method includes:
1) exponential smoothing is used to calculate new bending roller force, F according to actual measurement bending roller forcenew=(1-ks)Fold+ksFmes, its In, FoldFor last bending roller force setting value, FmesCurrently survey bending roller force, FnewNew roller force value, ksFor Smoothness Index, Determine according to error between the setting value calculated and measured value, span 0～1.0；
2) adaptation coefficient is calculated,
3) adaptation coefficient is used in setting model, and then obtains:
Work roll bending power setting model:
FW=kaW(c0+c1DW+c2DW 2+c3CW+c4CW 2+c5δ+c6δ2+c7p+c8p2)·(c9+c10B+c11B2)；
Intermediate calender rolls bending roller force setting model:
FI=kaI(a0+a1B+a2B2+a3B3)FW；
Wherein, kaW、kaIIt is respectively work roll bending power and intermediate calender rolls bending roller force adaptation coefficient.
As it has been described above, the present invention analyses in depth the thing between various influence factors and optimal bending roller force based on plate shape mechanism model Reason relation, determines mathematical relationship clear and definite between intermediate calender rolls bending roller force and work roll bending power according to the device parameter of milling train, builds Vertical theoretical rigorous, explicit physical meaning, fast and reliable, the most reasonably six-roll cold mill bending roller force setting model, and pass through mould Type self adaptation improves setup algorithm precision further, it is ensured that the strip shape quality that product is good.
Accompanying drawing explanation
Fig. 1 is six-roll cold mill schematic diagram；
Fig. 2 is that the production technology and equipments of five frame six roller tandem mills arranges schematic diagram；
Fig. 3 is the calculation flow chart of plate shape mechanism model of the present invention；
Fig. 4 is six-roll cold mill optimal bending roller force calculation flow chart；
Fig. 5 is bending roller force measured value and the comparison diagram of setting value after the establishing method using the present invention；
The a kind of of the setting device of a kind of six-roll cold mill bending roller force that Fig. 6 provides for the present invention implements schematic diagram；
The another kind of of the setting device of a kind of six-roll cold mill bending roller force that Fig. 7 provides for the present invention implements schematic diagram.
Drawing reference numeral explanation
100 parameter acquisition module
200 bending roller force computing modules
300 adaptation modules
Detailed description of the invention
Below by way of specific instantiation, embodiments of the present invention being described, those skilled in the art can be by this specification Disclosed content understands other advantages and effect of the present invention easily.The present invention can also be by the most different concrete realities The mode of executing is carried out or applies, the every details in this specification can also based on different viewpoints and application, without departing from Various modification or change is carried out under the spirit of the present invention.It should be noted that, in the case of not conflicting, following example and enforcement Feature in example can be mutually combined.
It should be noted that the diagram provided in following example illustrates the basic structure of the present invention the most in a schematic way Think, the most graphic in component count, shape and size time only display with relevant assembly in the present invention rather than is implemented according to reality Drawing, during its actual enforcement, the kenel of each assembly, quantity and ratio can be a kind of random change, and its assembly layout kenel is also It is likely more complexity.
The present embodiment, as a example by 1450mm five frame six roller tandem mills, carries out principle to the summary of the invention of the present invention Illustrate and verify.
First, the relevant parameter related to
Device parameter includes: work roll diameter DW=385mm～425mm, working roll barrel length LW=1450mm, work Roll bending hydraulic cylinder centre-to-centre spacing dW=2400mm, working roll elastic modulus EW=210000MPa, working roll Poisson's ratio vW=0.3, Initial convexity C of working rollW=0, intermediate calender rolls diameter DI=440mm～490mm, intermediate calender rolls barrel length LI=1437.5mm, middle Roll bending hydraulic cylinder centre-to-centre spacing dI=2850mm, intermediate calender rolls elastic modulus EI=210000MPa, intermediate calender rolls Poisson's ratio vI=0.3, Initial convexity C of intermediate calender rollsI=0, support roller diameter DB=1150mm～1300mm, supports roller barrel length LB=1450mm, supports Roll bending hydraulic cylinder centre-to-centre spacing dB=2650mm, supports roller elastic modulus EB=210000MPa, supports roller Poisson's ratio vB=0.3, Support initial convexity C of rollerB=0；
Band parameter includes: the raw material trade mark is SPCC, width B=1000mm, ingoing ga(u)ge H=2.0mm, finished product thickness h =0.5mm, initial convexity C of bandS=0.03mm, band elastic modulus ES=208000MPa, band Poisson's ratio vS=0.28；
Rolling technological parameter includes: middle roll shift position initial value δ0=50mm, work roll bending power initial value FW0= 0, intermediate calender rolls bending roller force initial value FI0=0, front tensile stress initial value tf0=145MPa, rear tensile stress initial value tb0=40MPa.
Second, analysis that optimal bending roller force is affected by various influence factors and the foundation of bending roller force setting model
In conjunction with Fig. 3 and 4, the present embodiment uses plate shape mechanism model to analyze each factor and advises the impact of optimal bending roller force Rule, before this, it is thus necessary to determine that some other parameter required for model calculating, including: band entrance transverse gage is distributed Represent by quadratic polynomialWherein, H0For band donor center dot thickness, mm, B are strip steel Width, mm, x are coordinate on strip width direction, mm, and with strip steel central point as initial point, C is strip material plate convexity, and mm, d are convexity Calculating reference point distance steel edge portion distance, d=100mm, band division unit size delta x=20mm, roll force distribution meter Calculate error precision ε1=10-3KN, between roller, gross pressure calculates error precision ε2=10-1KN, thickness distribution calculates error precision ε3= 10-4Mm, toe-out stress distribution calculates error precision ε4=10-2MPa。
Further, keeping other design conditions constant, evaluation work roller diameter is respectively DW1=400mm, DW2= 420mm and DW3During=440mm, strip width be respectively 700mm, 800mm, 900mm, 1000mm, 1100mm, 1200mm and Optimal bending roller force during 1300mm, by the method using mathematical regression, determines optimal bending roller force and work roll diameter and band Functional relationship between width:
F = ( c R w 0 + c R w 1 R W + c R w 2 · R W 2 ) · ( b 0 + b 1 B + b 2 B 2 ) .
In like manner, keep other design conditions constant, respectively change intermediate calender rolls diameter, support roller diameter, work roll crown, in Between roll crown, support roll crown, band access panel convexity, front tensile stress, rear tensile stress, middle roll shift position and unit width The size of degree roll-force, calculate corresponding strip width be respectively 700mm, 800mm, 900mm, 1000mm, 1100mm, 1200mm and Optimal bending roller force during 1300mm, the method using mathematical regression, determine the functional relationships between each influence factor and optimal bending roller force It it is formula.
Finally, finding after being analyzed the calculated results, intermediate calender rolls diameter and support roller diameter are to optimal bending roller force Impact less, front and back tensile stress affects bending roller force by influence of rolled power, therefore can ignore；In view of six-roll cold mill Intermediate calender rolls and support roller generally use flat rolling, its convexity is zero, the two influence factor is removed in a model；Band Entrance convexity is relatively big on the impact of bending roller force, but in view of in actual production, generally cannot survey the strip crown size of supplied materials, institute With by its comprehensive consideration in the constant term of model of impact (and other immeasurability factor) on bending roller force, then the most curved The setting model of roller power can be expressed as:
F W = ( c 0 + c 1 D W + c 2 D W 2 + c 3 C W + c 4 C W 2 + c 5 δ + C 6 δ 2 + c 7 p + c 8 p 2 ) · ( c 9 + c 10 B + c 11 B 2 ) Wherein, c0～c11For model coefficient；DWFor work roll diameter, mm；CWFor work roll crown, CW=CWg+CWt+CWwear, wherein CWg For working roll original grinding convexity, mm, CWtFor work roll thermal crown, roller heat convex degree learning setting model it is calculated, mm, CWwearFor working roller abrasion convexity, roll wear model it is calculated, mm；δ is middle roll shift position, mm；P is unit width Degree roll-force, kN/mm；B is strip width, mm.
Further, by above-mentioned various influence factors, the analysis result that optimal bending roller force affects be can be seen that optimal centre There is certain relation between roll bending power and best effort roll bending power, this relation is by strip width, roller diameter (work Roller diameter, intermediate calender rolls diameter, support roller diameter), roll crown (work roll crown, intermediate calender rolls convexity, support roll crown), entrance The impact of the factor such as strip profile, front and back tensile stress, middle roll shift position, special rolling force, but impact maximum is Strip width, and this impact is non-linear relation, after mathematical regression is analyzed, can represent by below equation:
FI=(a0+a1B+a2B2+a3B3)FW；
Wherein, a0=-0.06013, a1=0.004359, a2=-5.25 × 10-6, a3=2.13 × 10-9。
3rd, determine the coefficient of work roll bending power setting model
In order to determine work roll bending power setting model coefficient, the present embodiment can use the cold company of 1450mm five frame six roller The actual measurement work roll bending force value of milling train group, rolled strip specification includes, thickness 0.20mm～2.0mm, width 1000mm～ 1300mm, product level has CQ, DQ and DDQ, totally 9000 coiled strip steel data, through measured data carrying out validity check and picking After bad data, take volume 2000 after totally 10000 bending roller force measured values carry out mathematical nonlinear regression therein, Work roll bending power setting model coefficient, wherein, c are arrived0=4574.37, c1=-43.995, c2=0.1042, c3= 463.112, c4=-1294.8, c5=0.476, c6=0.0113, c7=145.202, c8=-9.132, c9=-0.355, c10= 0.00107, c11=5.056 × 10-7。
4th, bending roller force setting model is carried out experimental verification
Device parameter, band parameter and other rolling technological parameter according to 1450mm five frame six roller tandem mills, Utilizing the model coefficient determined i.e. can solve the bending roller force setting value of 1#～5# frame, as shown in table 1, wherein working roll is convex Degree is original grinding convexity and the calculated roll thermal crown of setting model and abrasion convexity sum.
Shelf number DW/mm CW/mm δ/mm p/kN/mm B/mm FW/kN FI/kN
1# 392 0.06 50 7.5 1200 120.3 155.9
2# 390 0.042 50 8.2 1200 120.1 155.5
3# 398 0.09 50 8.6 1200 119.8 155.3
4# 386 0.04 50 8.3 1200 121.2 157.0
5# 397 0.021 50 7.9 1200 116.5 150.9
Table 1:1450mm five frame six roller tandem mills bending roller force setting value
5th, the self adaptation checking of bending roller force setting model
Front four frames of five frame six roller tandem mills use bending roller force setting value, and 5# frame bending roller force is with setting value On the basis of, it is adjusted according to the plate shape situation of outlet band, is configured with in the tandem mill of plate shape roller at 5# rack outlet, roller Power mainly regulates in real time according to actual measurement strip flatness；In the tandem mill being not configured with plate shape roller, then according to operative employee Judgement carry out manual adjustment.
Therefore, when actually used, the adaptation coefficient of 1#～4# frame bending roller force setting model is set to 1, and 5# frame Bending roller force setting model adaptation coefficient then change according to the change of measured value.Such as table 2, cold for 1450mm five frame six roller Continuous mill train is the bending roller force model adaptation coefficient of 5# frame after 902 coiled strip rollings, and it is mainly according to institute's strip Width and thickness divide.
The adaptation coefficient of table 2:1450mm five frame six roller tandem mills 5# frame bending roller force setting model
The bending roller force of 1333 coiled strip steels taking actual production is analyzed, and 5# frame bending roller force measured value contrasts with setting value Coincide very well as it is shown in figure 5, set bending roller force with actual measurement bending roller force, overwhelming majority errors all fall within ± 20% in the range of, only The bending roller force absolute error having 4.76% has exceeded 20%.Consider the bending roller force deviation situation of 5 frames, if definition sets Determine bending roller force and actual measurement bending roller force between deviation exceed ± 20.0% time carry out manual intervention, then manual intervention rate is 0.94%；If deviation is not in the range of ± 5% between definition measured value and setting value, carry out manual adjustment, then manually do Pre-rate is 7.99%, illustrates that the model that the present invention sets up has high setting accuracy.
See Fig. 6, in being embodied as, a kind of six rollers can be provided cold rolling according to the bending roller force setting model of above-mentioned foundation The setting device of machine bending roller force, it may include that parameter acquisition module 100, for obtaining the device parameter of six-roll cold mill, band Material parameter and rolling technological parameter；Bending roller force computing module 200, for by described device parameter, band parameter and rolling mill practice In parameter input bending roller force setting model, it is calculated the optimal bending roller force setting value of working roll and intermediate calender rolls respectively, and gives Output.
In being embodied as, described bending roller force setting model is the mathematical model set up by said method, can be in order to With computer program, this mathematical model is configured to a software function module, and is written into processor, specifically may be used Being to be written in the storage medium of processor, and then read the computer program at this software function module place by processor Instruct and perform corresponding calculation procedure, finally realize the output of optimal bending roller force.
Specifically, described bending roller force setting model may include that
Work roll bending power setting model:
,
Wherein, c0～c11For model coefficient；DWFor working roll radius, unit is mm；CWFor work roll crown, unit is mm； δ is middle roll shift position, and unit is mm；P is unit width roll-force, and unit is kN/mm；B is strip width, and unit is mm；
Intermediate calender rolls bending roller force setting model:
FI=(a0+a1B+a2B2+a3B3)FW, wherein, FIFor intermediate calender rolls bending roller force, unit is kN；B is strip width, unit For mm；a0～a3For model coefficient.
More specifically, the band parameter inputted in parameter acquisition module 100 can be strip width；Described equipment is joined Number can be work roll diameter, work roll crown, middle roll shift position；Described rolling technological parameter can be rolling force setup Value.
See Fig. 7, in being embodied as, it is also possible to including:
Adaptation module 300, for obtaining the actual measurement roller of presently described six-roll cold mill when six-roll cold mill works Power, by described actual measurement bending roller force input adaptive model, is calculated adaptation coefficient, makes described bending roller force setting model depend on Recalculate the optimal bending roller force setting value of described working roll and intermediate calender rolls according to described adaptation coefficient, and exported.
Specifically, described adaptive model includes:
k a = F n e w F o l d ;
Fnew=(1-ks)Fold+ksFmes；
Wherein, kaFor adaptation coefficient；FoldFor last bending roller force setting value, FmesCurrently survey bending roller force, FnewNewly Roller force value, ksFor Smoothness Index；
After described adaptation coefficient is inputted described bending roller force setting model, described bending roller force setting model is just provided with certainly Adaptive functions, i.e. bending roller force setting model is just updated to:
Work roll bending power setting model:
FW=kaW(c0+c1DW+c2DW 2+c3CW+c4CW 2+c5δ+c6δ2+c7p+c8p2)·(c9+c10B+c11B2)；
Wherein, c0～c11For model coefficient；DWFor working roll radius, unit is mm；CWFor work roll crown, unit is mm； δ is middle roll shift position, and unit is mm；P is unit width roll-force, and unit is kN/mm；B is strip width, and unit is mm；
Intermediate calender rolls bending roller force setting model:
FI=kaI(a0+a1B+a2B2+a3B3)FW, wherein, FIFor intermediate calender rolls bending roller force, unit is kN；B is strip width, single Position is mm；a0～a3For model coefficient.
In sum, the present invention analyses in depth the thing between various influence factors and optimal bending roller force based on plate shape mechanism model Reason relation, determines mathematical relationship clear and definite between intermediate calender rolls bending roller force and work roll bending power according to the device parameter of milling train, builds Vertical theoretical rigorous, explicit physical meaning, fast and reliable, the most reasonably six-roll cold mill bending roller force setting model, and pass through mould Type self adaptation improves setup algorithm precision further, it is ensured that the strip shape quality that product is good.So, the present invention effectively overcomes existing The various shortcoming in technology is had to have high industrial utilization.
The principle of above-described embodiment only illustrative present invention and effect thereof, not for limiting the present invention.Any ripe Above-described embodiment all can be modified under the spirit and the scope of the present invention or change by the personage knowing this technology.Cause This, have usually intellectual such as complete with institute under technological thought without departing from disclosed spirit in art All equivalences become are modified or change, and must be contained by the claim of the present invention.

Claims (10)

1. the establishing method of a six-roll cold mill bending roller force, it is characterised in that described establishing method includes:
Obtain the device parameter of six-roll cold mill, band parameter and rolling technological parameter；
By in described device parameter, band parameter and rolling technological parameter input bending roller force setting model, it is calculated work respectively Make the optimal bending roller force setting value of roller and intermediate calender rolls, and exported.
The establishing method of six-roll cold mill bending roller force the most according to claim 1, it is characterised in that described bending roller force sets Model is the mathematical model pre-build, comprising:
Work roll bending power setting model:
FW=(c0+c1DW+c2DW 2+c3CW+c4CW 2+c5δ+c6δ2+c7p+c8p2)·(c9+c10B+c11B2)；
Wherein, c0～c11For model coefficient；DWFor working roll radius, unit is mm；CWFor work roll crown, unit is mm；δ is Middle roll shift position, unit is mm；P is unit width roll-force, and unit is kN/mm；B is strip width, and unit is mm；
Intermediate calender rolls bending roller force setting model:
FI=(a0+a1B+a2B2+a3B3)FW, wherein, FIFor intermediate calender rolls bending roller force, unit is kN；B is strip width, and unit is mm；a0～a3For model coefficient.
The establishing method of six-roll cold mill bending roller force the most according to claim 2, it is characterised in that described band parameter bag Include strip width；Described device parameter includes work roll diameter, work roll crown, middle roll shift position；Described rolling mill practice Parameter includes rolling force setup value.
The establishing method of six-roll cold mill bending roller force the most according to claim 1, it is characterised in that further comprise the steps of:
When six-roll cold mill works, obtain the actual measurement bending roller force of presently described six-roll cold mill；
By in described actual measurement bending roller force input adaptive model, it is calculated adaptation coefficient, makes described bending roller force setting model Recalculate the optimal bending roller force setting value of described working roll and intermediate calender rolls according to described adaptation coefficient, and exported.
The establishing method of six-roll cold mill bending roller force the most according to claim 4, it is characterised in that described adaptive model Including:
k a = F n e w F o l d ;
Fnew=(1-ks)Fold+ksFmes；
Wherein, kaFor adaptation coefficient；FoldFor last bending roller force setting value, FmesCurrently survey bending roller force, FnewNew is curved Roller force value, ksFor Smoothness Index；
Wherein, described bending roller force setting model includes:
Work roll bending power setting model:
FW=kaW(c0+c1DW+c2DW 2+c3CW+c4CW 2+c5δ+c6δ2+c7p+c8p2)·(c9+c10B+c11B2)；
Wherein, c0～c11For model coefficient；DWFor working roll radius, unit is mm；CWFor work roll crown, unit is mm；δ is Middle roll shift position, unit is mm；P is unit width roll-force, and unit is kN/mm；B is strip width, and unit is mm, kaW For work roll bending force adaptive coefficient；
Intermediate calender rolls bending roller force setting model:
FI=(a0+a1B+a2B2+a3B3)FW, wherein, FIFor intermediate calender rolls bending roller force, unit is kN；B is strip width, and unit is mm；a0～a3For model coefficient, kaIFor intermediate calender rolls bending roller force adaptation coefficient.
6. the setting device of a six-roll cold mill bending roller force, it is characterised in that including:
Parameter acquisition module, for obtaining the device parameter of six-roll cold mill, band parameter and rolling technological parameter；
Bending roller force computing module, for setting mould by described device parameter, band parameter and rolling technological parameter input bending roller force In type, it is calculated the optimal bending roller force setting value of working roll and intermediate calender rolls respectively, and is exported.
The setting device of six-roll cold mill bending roller force the most according to claim 6, it is characterised in that described bending roller force sets Model is the mathematical model pre-build, comprising:
Work roll bending power setting model:
FW=(c0+c1DW+c2DW 2+c3CW+c4CW 2+c5δ+c6δ2+c7p+c8p2)·(c9+c10B+c11B2)；
Wherein, c0～c11For model coefficient；DWFor working roll radius, unit is mm；CWFor work roll crown, unit is mm；δ is Middle roll shift position, unit is mm；P is unit width roll-force, and unit is kN/mm；B is strip width, and unit is mm；
Intermediate calender rolls bending roller force setting model:
FI=(a0+a1B+a2B2+a3B3)FW, wherein, FIFor intermediate calender rolls bending roller force, unit is kN；B is strip width, and unit is mm；a0～a3For model coefficient.
The setting device of six-roll cold mill bending roller force the most according to claim 7, it is characterised in that described band parameter bag Include strip width；Described device parameter includes work roll diameter, work roll crown, middle roll shift position；Described rolling mill practice Parameter includes rolling force setup value.
The setting device of six-roll cold mill bending roller force the most according to claim 6, it is characterised in that also include:
Adaptation module, for obtaining the actual measurement bending roller force of presently described six-roll cold mill, by institute when six-roll cold mill works State in actual measurement bending roller force input adaptive model, be calculated adaptation coefficient, make described bending roller force setting model according to described Adaptation coefficient recalculates the optimal bending roller force setting value of described working roll and intermediate calender rolls, and is exported.
The setting device of six-roll cold mill bending roller force the most according to claim 9, it is characterised in that described adaptive mode Type includes:
k a = F n e w F o l d ;
Fnew=(1-ks)Fold+ksFmes；
Wherein, kaFor adaptation coefficient；FoldFor last bending roller force setting value, FmesCurrently survey bending roller force, FnewNew is curved Roller force value, ksFor Smoothness Index；
Wherein, described bending roller force setting model includes:
Work roll bending power setting model:
FW=kaW(c0+c1DW+c2DW 2+c3CW+c4CW 2+c5δ+c6δ2+c7p+c8p2)·(c9+c10B+c11B2)；
Wherein, c0～c11For model coefficient；DWFor working roll radius, unit is mm；CWFor work roll crown, unit is mm；δ is Middle roll shift position, unit is mm；P is unit width roll-force, and unit is kN/mm；B is strip width, and unit is mm, kaW For work roll bending force adaptive coefficient；
Intermediate calender rolls bending roller force setting model:
FI=kaI(a0+a1B+a2B2+a3B3)FW, wherein, FIFor intermediate calender rolls bending roller force, unit is kN；B is strip width, and unit is mm；a0～a3For model coefficient, kaIFor intermediate calender rolls bending roller force adaptation coefficient.
CN201610637531.0A 2016-08-05 2016-08-05 The establishing method of a kind of six-roll cold mill bending roller force and device Pending CN106216409A (en)

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CN111790761A (en) * 2020-08-11 2020-10-20 中铝瑞闽股份有限公司 Method for optimizing hot roller bending value of four-roller aluminum rolling mill
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CN116174497A (en) * 2023-01-06 2023-05-30 北京科技大学 Cold continuous rolling bending roll force online prediction method based on data driving

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CN109351781A (en) * 2018-10-10 2019-02-19 首钢京唐钢铁联合有限责任公司 A kind of strip seam side wave control method and device
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
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
CN111790761A (en) * 2020-08-11 2020-10-20 中铝瑞闽股份有限公司 Method for optimizing hot roller bending value of four-roller aluminum rolling mill
CN111790761B (en) * 2020-08-11 2022-03-08 中铝瑞闽股份有限公司 Method for optimizing hot roller bending value of four-roller aluminum rolling mill
CN112207139A (en) * 2020-11-04 2021-01-12 攀枝花学院 Method for calculating rolling force of six-roller temper mill
CN112588839A (en) * 2020-11-26 2021-04-02 燕山大学 Method and system for compensating bending roller by taking shape control as target
CN112588839B (en) * 2020-11-26 2021-11-23 燕山大学 Method and system for compensating bending roller by taking shape control as target
CN113787099A (en) * 2021-07-20 2021-12-14 马鞍山钢铁股份有限公司 Acid pickling cold rolling method for 780 MPa-grade high-strength automobile plate
CN113787099B (en) * 2021-07-20 2022-12-27 马鞍山钢铁股份有限公司 Acid pickling cold rolling method for 780 MPa-grade high-strength automobile plate
CN113578977A (en) * 2021-07-21 2021-11-02 张家港扬子江冷轧板有限公司 Method for eliminating press-in defect of high-strength automobile steel point-like foreign matter
CN116174497A (en) * 2023-01-06 2023-05-30 北京科技大学 Cold continuous rolling bending roll force online prediction method based on data driving
CN116140375A (en) * 2023-02-15 2023-05-23 北京科技大学 Roll bending and shifting cooperative control method for variable convexity working roll aiming at local high point of strip steel
CN116140375B (en) * 2023-02-15 2024-04-16 北京科技大学 Roll bending and shifting cooperative control method for variable convexity working roll aiming at local high point of strip steel
CN115971258A (en) * 2023-03-20 2023-04-18 山西建龙实业有限公司 Control method for strip shape and plate convexity of narrow strip steel hot continuous rolling mill
CN115971258B (en) * 2023-03-20 2023-05-16 山西建龙实业有限公司 Control method for strip shape and convexity of hot continuous strip mill

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