CN104785539B - A kind of method compensated for the tension optimization of roll-force regulation - Google Patents
A kind of method compensated for the tension optimization of roll-force regulation Download PDFInfo
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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
- B21B37/48—Tension control; Compression control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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- 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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Abstract
A kind of method compensated for the tension optimization of roll-force regulation, relate to control equipment or the method being specially adapted for rolling mill for metal or its converted products, particularly relate to a kind of method that tension optimization being adjusted roll-force according to the iron powder concentration of rolling lubrication emulsion compensates, comprise the following steps: A. obtains emulsion iron powder monitoring on same day concentration from cold continuous rolling set control system, according to emulsion iron powder monitoring on same day concentration, calculate the coefficient of friction that each frame is corresponding；B. according to actual tension and the calculated coefficient of friction of each section strip steel, the setting tension force of each section strip steel is adjusted；According to setting tension force and the roll-force of each rolling machine frame, calculate each frame slip factor, with the minimum object function of incidence rate of skidding, be optimized compensation to setting tension force.The present invention passes through Optimal Setting tension force, it is achieved at utmost reduce the incidence rate of the defects such as the production cost increase caused because iron powder concentration abnormality raises and plate shape, it is ensured that the stability of the operation of rolling.
Description
Technical field
The present invention relates to be specially adapted for the control equipment of rolling mill for metal or its converted products or method, particularly relate to a kind of root
The method that the tension optimization being adjusted roll-force according to the iron powder concentration of rolling lubrication emulsion compensates.
Background technology
In cold breast breast process mathematical model system processed, rolling force model plays an important role.During Cold Rolling,
Coefficient of friction is the most important factor of influence of rolled power, directly determines the size of roll-force.Meanwhile, coefficient of friction model
With the computational accuracy that the computational accuracy of deformation resistance model determines rolling force model, it may be said that coefficient of friction is to cold rolling of strip steel
Thickness and the plate shape precision of process have large effect.Chinese invention patent application " a kind of belt steel rolling On-line Control friction
Modulus Model optimization method " (application number: 201210002100.9 application publication numbers: CN103191919A) disclose one
Plant belt steel rolling On-line Control coefficient of friction model optimization method, the actual measurement roll-force of belt steel rolling process is substituted into roll-force
In theoretical calculation model.Owing to roll-force is the function of coefficient of friction, therefore processed by variant and obtain containing with the system that rubs
Number is the nonlinear equation of independent variable.In addition to actual measurement rolling force value is substituted into roll-force theoretical calculation model, also will roll
During system, the data such as the actual entry thickness of strip steel, actual exit thickness, actual tension substitute into tube rolling simulation mould simultaneously
Type.The Practical Calculation value of coefficient of friction is obtained, based on actual coefficient of friction, to rubbing by solving this nonlinear equation
Wipe coefficient theoretical calculation model and carry out adaptive optimization.Although coefficient of friction on-line setup precision can be improved by the method,
But, owing to, in cold-rolling process, there is a certain degree of abrasion between roll and rolled piece, cause ferrous powder granules continuous
In the middle of entrance emulsion, have a strong impact on the spatter property of emulsion.Existing system is generally by cloth on emulsion closed circuit
Put the iron powder concentration that vacuum filter, magnetic bar filter, back-flushing filtering device etc. reduce in emulsion.Normal conditions
Under, by above measure, iron powder concentration can be controlled in a zone of reasonableness, it is ensured that rolling condition is stablized and product
Quality is good.But when equipment removes iron power removing scarce capacity or the harder steel grade of continuous rolling material, carry out rolling profit
The sliding iron powder concentration in the middle of emulsion can raise.So, on the one hand easily cause strip steel surface residual ferrum, reduce product matter
Amount；On the other hand can affect the lubricity of emulsion, cause coefficient of friction in the operation of rolling to increase, see Fig. 1, thus draw
Play roll-force to increase.Belt plate shape is easily caused to surpass by Rolling production practice and correlation theory it is recognised that roll-force increases
The most how the defects such as difference, surface quality reduction, control owing to iron powder concentration increases the abnormal increase of the roll-force caused, just
Become the emphasis of site technology tackling key problem.
Although iron powder concentration can be reduced by increasing filter plant or raising equipment intensity filter, but so must increase
Big equipment investment；It addition, be also adopted by the method more renewing emulsion, but now all other indexs of old emulsion may
Also within normal range, more renew emulsion and not only there is a certain degree of waste, also add the cost of production.
Summary of the invention
It is an object of the invention to provide a kind of method compensated for the tension optimization of roll-force regulation, solve due to emulsion
Middle iron powder concentration increases the abnormal increase of the roll-force caused, and causes the skill of the defects such as overproof, the surface quality reduction of belt plate shape
Art problem, to improve the utilization rate of emulsion, to reduce production cost, ensures that rolling is stablized and product quality simultaneously.
The present invention solves above-mentioned technical problem and be the technical scheme is that
A kind of method compensated for the tension optimization of roll-force regulation, for the control system of tandem mills, described cold
Continuous mill train possesses the most tactic multiple rolling machine frame；The control system of described tandem mills is according to cold continuous rolling
Organizing each device parameter and rolling technological parameter, before and after determining, the actual tension of each section strip steel between adjacent each frame, determines
The roll-force of each rolling machine frame；And
A. emulsion iron powder monitoring on same day concentration is obtained from cold continuous rolling set control system, according to emulsion iron powder monitoring on the same day
Concentration, calculates the coefficient of friction that each frame is corresponding；
B. according to actual tension and the calculated coefficient of friction of each section strip steel, the setting tension force of each section strip steel is adjusted；Root
According to setting tension force and the roll-force of each rolling machine frame, calculate each frame slip factor, with incidence rate of skidding minimum target letter
Number, is optimized compensation to setting tension force；
It is characterized in that the method that the described tension optimization for roll-force regulation compensates comprises the following steps:
S01: collect each device parameter and rolling technological parameter in the current operation of rolling, including each frame work roll diameter Dk、
Actual reduction ratio εk, actual tension Ts', the maximum tension T that allowed of unitmax, and strip material thickness h0, width B,
Exit thickness h5, steel grade SG；Wherein, k is each frame numbering, k=1,2,3,4,5；S is each section of tension force numbering,
S=0,1,2,3,4,5；
S02: given feature roll-force P*And safety coefficient α；
S03: given each section sets tension adjustment step value Δ Ts=Ts'/N, wherein, Ts' it is the actual tension of s section,
S=1,2,3,4, N is tension adjustment total step number, N=10～50；
S04: collect emulsion iron powder monitoring on same day concentration ρ from cold continuous rolling set control system；
S05: according to emulsion iron powder monitoring on same day concentration ρ, calculate the coefficientoffrictionμ that each frame is correspondingk, computation model isWherein, λkCoefficient, λ is affected for iron powder steel gradek=1 × e-6～1 × e-4, ωkFor iron powder influence of specification
Coefficient, ωk=100～300, γkCoefficient, γ is affected for equipmentk=0.008～0.15；
S06: according to work roll diameter D of each framek, actual reduction ratio εk, strip material thickness h0, width B, go out
Mouth thickness h5With steel grade SG, determine that actual tension is Ts' time each frame roll-force Pk；
S07: ifThen proceed to step S08；Otherwise, each section is made to set tension force Ts=Ts', proceed to step
Rapid S22；Wherein, s=1,2,3,4；
S08: make skidding object function initial value f0(X)=1010, skidding judge process parameter beta=1；
S09: order sets tension force T1=T1', T1Adjustment process factor i=0；
S10: order sets tension force T2=T2', T2Adjustment process factor j=0；
S11: order sets tension force T3=T3', T3Adjustment process factor m=0；
S12: order sets tension force T4=T4', T4Adjustment process factor n=0；
S13: be D according to each frame work roll diameterk, actual reduction ratio εk, strip material thickness h0, width B, go out
Mouth thickness h5With steel grade SG, determine and set tension force as TsTime each frame roll-force Pk；
S14: ifThen proceed to step S15；Otherwise, step S18 is proceeded to；
S15: according to work roll diameter D of each framek, actual reduction ratio εk, the setting tension force T of front and back adjacent racksWith
Roll-force P of each framek, calculate each frame slip factor ψk；
S16: calculate the target function value f with the minimum target of skidding incidence rateβ(X)=A g1(X)+(1-A)·g2(X)；
Wherein,A is partition coefficient, 0 ＜ A ＜ 1；
X={T1,T2,T3,T4}；
S17: if fβ(X) ＜ fβ-1(X), then record is current sets tension force T1、T2、T3、T4, proceed to step S18；No
Then, f is madeβ(X)=fβ-1(X), β=β+1, proceed to step S18；
S18: if n is ＜ (Tmax-T4′)/ΔT4, then n=n+1, T are made4=T4′+n·ΔT4, proceed to step S13；Otherwise,
Proceed to step S19；
S19: if m is ＜ (Tmax-T3′)/ΔT3, then m=m+1, T are made3=T3′+m·ΔT3, proceed to step S12；Otherwise,
Proceed to step S20；
S20: if j is ＜ (Tmax-T2′)/ΔT2, then j=j+1, T are made2=T2′+j·ΔT2, proceed to step S11；Otherwise,
Proceed to step S21；
S21: if i is ＜ (Tmax-T1′)/ΔT1, then i=i+1, T are made1=T1′+i·ΔT1, proceed to step S10；Otherwise, turn
Enter step S22；
S22: output optimum setting tension force T1、T2、T3、T4；
S23: by tension force setting value T1、T2、T3、T4Send to cold continuous rolling set control system, regulate each interstand tension.
The invention has the beneficial effects as follows:
1. the method that the tension optimization for roll-force regulation of the present invention compensates, dense according to emulsion iron powder monitoring on the same day
Degree, calculates the coefficient of friction that each frame is corresponding；By Optimal Setting tension force, i.e. achieve and at utmost reduce because iron powder is dense
The incidence rate of the defects such as the production cost increase spending abnormal rising and cause and plate shape, in turn ensure that the steady of the operation of rolling simultaneously
Qualitative.
2. the method that the tension optimization for roll-force regulation of the present invention compensates, uses cold continuous rolling set control system existing
Emulsion iron powder monitoring concentration data, by computer program control realization tension optimization compensate control, can not increase
Improve operation of rolling control accuracy in the case of oil (gas) filling device investment, improve belt steel rolling product quality, can bring to enterprise
Bigger economic benefit.
Accompanying drawing explanation
Fig. 1 is the relation schematic diagram of emulsion iron powder concentration and coefficient of friction；
Fig. 2 is five Stands Cold Tandem Mill group tension force and roll-force layout drawing；
Fig. 3 and Fig. 4 is the control flow chart of the tension optimization compensation method that the present invention regulates for roll-force.
Detailed description of the invention
For better understanding of the technique scheme of the present invention, carry out the most detailed with embodiment below in conjunction with the accompanying drawings
Thin description.
The method that the tension optimization for roll-force regulation of the present invention compensates, for the tandem mills of tandem mills
Control system.The present invention fully combines five Stands Cold Tandem Mill group equipment feature and process characteristics, utilizes tension force before and after milling train
Impact on roll-force, to reduce roll-force and stable rolling as target, proposes one and is suitable for five Stands Cold Tandem Mill groups
, carry out the tension optimization compensation technique of roll-force regulation due to emulsion iron powder concentration abnormality.This technology implementation process
In, calculated the coefficient of friction of corresponding each frame by the iron powder concentration monitoring every day, and calculate the average of corresponding roll-force
Value, if this value of calculation exceedes certain sets the limit, then stepping increases interstand tension setting value, recalculates, is simultaneously introduced
The object function that suppression is skidded, before and after finally finding out each frame meeting condition in tension force allows set point, tension force is optimal
Setting value.As in figure 2 it is shown, be divided into six tension sections, wherein T before and after five Stands Cold Tandem Mill groups0And T5According to rolling
Process conditions processed have been given by, and the most optimizable tension force includes T1、T2、T3、T4Four sections.The control of described tandem mills
System processed according to each device parameter of tandem mills and rolling technological parameter, each section of band between adjacent each frame before and after determining
The actual tension of steel, determines the roll-force of each rolling machine frame, it is characterised in that the method that described tension optimization compensates also is wrapped
Include following steps:
A. emulsion iron powder monitoring on same day concentration is obtained from cold continuous rolling set control system, according to emulsion iron powder monitoring on the same day
Concentration, calculates the coefficient of friction that each frame is corresponding；
B. according to actual tension and the calculated coefficient of friction of each section strip steel, the setting tension force of each section strip steel is adjusted；Root
According to setting tension force and the roll-force of each rolling machine frame, calculate each frame slip factor, with incidence rate of skidding minimum target letter
Number, is optimized compensation to setting tension force.
Reflect in cold continuous rolling process that a certain frame is skidded the probability and the degree of skidding occurred in order to comprehensive, scientifical, this
Invention introduces slip factor ψ.The physical significance of slip factor is the neutral surface relative position in deformed area.Slip factor ψ
The least, represent neutral surface in the middle part of deformed area more close to, skid occur probability the least, occurrence degree is the lightest；And skid because of
Sub-ψ is the biggest, then it represents that neutral surface in the middle part of deformed area more away from, skid occur probability the biggest, occurrence degree is the heaviest, rolls
Process processed is the most unstable.Slip factor is a relative value, and when slip factor ψ is equal to zero, neutral surface is just in deformed area
Middle part, now change suddenly if there is certain rolling factor, such as, forward and backward tension force increase or reduce, can
To make the operation of rolling proceed under new poised state by zone of slippage on the delivery side change relative with zone of slippage on the entry side, and less hold
The phenomenon that unstability is skidded easily occur, in other words, the probability occurred that now skids is minimum, sees " the cold continuous rolling of Bai Zhenhua
High speed manufacturing processes core process mathematical model ", China Machine Press, 2009.For a cold continuous rolling process,
The slip factor ψ of frame kkCan be represented by the formula:
ψk=1/4 μk*[(Δh/R')1/2+(Tf-Tr)/Pk]
In formula: Δ h is passage absolute draft amount, R' is that working roll flattens radius；PkFor the roll-force of frame k, it calculates mould
Type can be found in " cold rolled strip steel production " of W.L. Luo Baici, metallurgical industry publishing house, and 1985.3；TfAnd TrIt is respectively frame
K leading portion and the tension force of back segment, μkFor the coefficient of friction of frame k,Wherein, λkFor iron powder steel grade
Affect coefficient, λk=1 × e-6～1 × e-4, ωkFor iron powder influence of specification coefficient, ωk=100～300, γkCoefficient is affected for equipment,
γk=0.008～0.15.
Embodiment one
Fig. 3 and Fig. 4 is an embodiment of the tension optimization compensation method that the present invention regulates for roll-force, at Fig. 3 and
In control flow chart shown in Fig. 4, the method that the tension optimization of the present invention compensates comprises the following steps:
S01: collect each equipment and rolling technological parameter in the current operation of rolling, including each frame work roll diameter
D1=513mm, D2=486.5mm, D3=532mm, D4=532.5mm, D5=493.3mm；Actual reduction ratio
ε1=24.64748%, ε2=37.26682%, ε3=31.95121%, ε4=32.04431%, ε5=24.91337%；Actual
Power:
T0'=132.57kN,
T1'=255,64kN,
T2'=156.84kN,
T3'=105.24kN,
T4'=75.6kN,
T5'=29.55kN；
The maximum tension T that unit is allowedmax=300kN, and strip material thickness h0=2.82mm, width
B=955mm, exit thickness h5=0.455mm, steel grade are SPHC；See Fig. 2.
S02: given feature roll-force P*=6455.828kN and safety coefficient α=1.2；
S03: given each section sets tension adjustment step value Δ Ts=Ts'/N, in the present embodiment, s=1,2,3,4；Tension force
Adjust total step number N=20,
ΔT1=T1'/20=12.782kN,
ΔT2=T2'/20=7.842kN,
ΔT3=T3'/20=5.262kN,
ΔT4=T4'/20=3.78kN；
S04: collect emulsion iron powder monitoring on same day concentration ρ=1081mg/L from cold continuous rolling set control system；
S05: calculate each frame correspondence coefficientoffrictionμ1,μ2,μ3,μ4,μ5, result of calculation is as follows:
μ1=7.1347 × 10-6e1081/153.55893+ 0.12302=0.131161；
μ2=0.00004e1081/191.74638+ 0.05005=0.061282；
μ3=0.00001e1081/141.65468+ 0.02019=0.040806；
μ4=0.00002e1081/157.02089+ 0.01358=0.033119；
μ5=0.00006e1081/195.39818+ 0.01033=0.025493；
S06: calculate roll-force P in each framek, wherein:
P1=8188.199kN,
P2=8950.568kN,
P3=8456.153kN,
P4=8364.541kN,
P5=6270.214kN:
S07: judge inequalityWhether set up？Due to
α·P*=7746.993kN, so inequalitySet up, therefore proceed to step S08；Otherwise, order
T1=T1′、T2=T2′、T3=T3′、T4=T4', proceed to step S22；
S08: make skidding object function initial value f0(X)=1010, skidding judge process parameter beta=1；
S09: order sets tension force T1=T1′+ΔT1=255.64kN+12.782kN=268.422kN, T1Adjustment process factor
I=1；
S10: order sets tension force T2=T2′+ΔT2=156.84kN+7.842kN=164.682kN, T2Adjustment process factor
J=1；
S11: order sets tension force T3=T3′+ΔT3=105.24kN+5.262kN=110.502kN, T3Adjustment process factor
M=1；
S12: order sets tension force T4=T4′+ΔT4=75.6kN+3.78kN=79.38kN, T4Adjustment process factor n=1；
S13: again calculate roll-force P of each framek, wherein:
P1=7334.124kN,
P2=7858.372kN,
P3=7582.162kN,
P4=7516.032kN,
P5=7225.866kN；
S14: judge inequalityWhether set up？Due to
α·P*=7746.993kN, so inequalitySet up, therefore proceed to step S15；Otherwise, turn
Enter step S18；
S15: calculate each frame slip factor, ψ1=0.31, ψ2=0.24, ψ3=0.27, ψ4=0.23, ψ5=0.21；
S16: calculating is with the target function value of the minimum target of skidding incidence rate:
fβ(X)=A g1(X)+(1-A)·g2(X)=0.18239；
Wherein,In this example, A=0.4；
S17: judge inequality fβ(X) ＜ fβ-1(X) whether set up？Due to fβ-1(X)=0.31371, so inequality
0.18239 ＜ 0.31371 sets up, and record is current sets tension force T1=268.422kN, T2=164.682kN,
T3=110.502kN, T4=79.38kN, proceeds to step S18；
S18: judge inequality n ＜ (Tmax-T4′)/ΔT4Whether set up？If setting up, then make n=n+1,
T4=T4′+n·ΔT4, proceed to step S13；Otherwise, step S19 is proceeded to；
S19: judge inequality m ＜ (Tmax-T3′)/ΔT3Whether set up？If setting up, then make m=m+1,
T3=T3′+m·ΔT3, proceed to step S12；Otherwise, step S20 is proceeded to；
S20: judge inequality j ＜ (Tmax-T2′)/ΔT2Whether set up？If setting up, then make j=j+1,
T2=T2′+j·ΔT2, proceed to step S11；Otherwise, step S21 is proceeded to；
S21: judge inequality i ＜ (Tmax-T1′)/ΔT1Whether set up？If setting up, then make i=i+1, T1=T1′+i·ΔT1,
Proceed to step S10；Otherwise, step S22 is proceeded to；
S22: output optimum setting tension force T1=268.422kN, T2=164.682kN, T3=110.502kN, T4=79.38kN；
S23: tension force setting value is sent to five Stands Cold Tandem Mill set control systems, regulates each interstand tension.
Embodiment two
S01: collect each equipment and rolling technological parameter in the current operation of rolling, including each frame work roll diameter
D1=514.4mm, D2=488.1mm, D3=535.2mm, D4=525mm, D5=509.8mm；Actual reduction ratio
ε1=32.74609%, ε2=40.12407%, ε3=38.78635%, ε4=36.42558%, ε5=32.1913%；Actual
Tension force:
T0'=74.06001kN,
T1'=122.8kN,
T2'=80.2N,
T3'=49.76kN,
T4'=37.6kN,
T5'=12.05kN；
The maximum tension T that unit is allowedmax=300kN, and strip material thickness h0=1.82mm, width
B=839mm, exit thickness h5=0.19mm, steel grade are MRT4CA；
S02: given feature roll-force P*=6569.932kN, safety coefficient α=1.2；
S03: given each section sets tension adjustment step value Δ Ts=Ts'/N, in the present embodiment, tension adjustment total step number
N=20,
ΔT1=T1/ 20=6.14kN,
ΔT2=T2/ 20=4.01kN,
ΔT3=T3/ 20=2.488kN,
ΔT4=T4/ 20=1.88kN；
S04: collect emulsion iron powder monitoring on same day concentration ρ=1147mg/L from cold continuous rolling set control system；
S05: calculate each frame correspondence coefficientoffrictionμ1,μ2,μ3,μ4,μ5, result of calculation is as follows:
μ1=7.1347 × 10-6e1147/153.55893+ 0.12302=0.135532；
μ2=0.00004e1147/191.74638+ 0.05005=0.065897；
μ3=0.00001e1147/141.65468+ 0.02019=0.053041；
μ4=0.00002e1147/157.02089+ 0.01358=0.043327；
μ5=0.00006e1147/195.39818+ 0.01033=0.031586；
S06: calculate roll-force P in each framek, wherein:
P1=8212.371kN,
P2=7898.426kN,
P3=8075.072kN,
P4=7982.928kN,
P5=7798.472kN:
S07: judge inequalityWhether set up？Due to
α·P*=7883.918kN, so inequalitySet up, therefore proceed to step S08；Otherwise, order
T1=T1′、T2=T2′、T3=T3′、T4=T4', proceed to step S22；
S08: make skidding object function initial value f0(X)=1010, skidding judge process parameter beta=1；
S09: order sets tension force T1=T1′+ΔT1=122.8kN+6.14kN=128.94kN, T1Adjustment process factor i=1；
S10: order sets tension force T2=T2′+ΔT2=80.2kN+4.01kN=84.21kN, T2Adjustment process factor j=1；
S11: order sets tension force T3=T3′+ΔT3=49.76kN+2.488kN=52.248kN, T3Adjustment process factor
M=1；
S12: order sets tension force T4=T4′+ΔT4=75.6kN+1.88kN=39.48kN, T4Adjustment process factor n=1；
S13: again calculate roll-force P of each framek, wherein:
P1=7937.219kN,
P2=7793.632kN,
P3=7683.072kN,
P4=7704.842kN,
P5=7582.963kN；
S14: judge inequalityWhether set up？Due to
α·P*=7883.918kN, so inequalitySet up, therefore proceed to step S15；Otherwise, turn
Enter step S18；
S15: calculate each frame slip factor, ψ1=0.29, ψ2=0.23, ψ3=0.26, ψ4=0.24, ψ5=0.22；
S16: calculate the target function value with the minimum target of skidding incidence rate
fβ(X)=A g1(X)+(1-A)·g2(X)=0.170999；
Wherein,In this example, A=0.4；
S17: judge inequality fβ(X) ＜ fβ-1(X) whether set up？Due to fβ-1(X)=0.287308, so inequality
0.170999 ＜ 0.287308 sets up, then record is current sets tension force T1=128.94kN, T2=84.21kN, T3=52.248kN,
T4=39.48kN, proceeds to step S18；
S18: judge inequality n ＜ (Tmax-T4′)/ΔT4Whether set up？If setting up, then make n=n+1,
T4=T4′+n·ΔT4, proceed to step S13；Otherwise, step S19 is proceeded to；
S19: judge inequality m ＜ (Tmax-T3′)/ΔT3Whether set up？If setting up, then make m=m+1,
T3=T3′+m·ΔT3, proceed to step S12；Otherwise, step S20 is proceeded to；
S20: judge inequality j ＜ (Tmax-T2′)/ΔT2Whether set up？If setting up, then make j=j+1,
T2=T2′+j·ΔT2, proceed to step S11；Otherwise, step S21 is proceeded to；
S21: judge inequality i ＜ (Tmax-T1′)/ΔT1Whether set up？If setting up, then make i=i+1, T1=T1′+i·ΔT1,
Proceed to step S10；Otherwise, step S22 is proceeded to；
S22: output optimum setting tension force T1=128.94kN, T2=84.21kN, T3=52.248kN, T4=39.48kN；
S23: tension force setting value is sent to five Stands Cold Tandem Mill set control systems, regulates each interstand tension.
Those of ordinary skill in the art is it should be appreciated that above embodiment is intended merely to illustrate the skill of the present invention
Art scheme, and it is not used as limitation of the invention, any connotation based on the present invention is to embodiment described above
The change made, modification, all will fall in the scope of the claims of the present invention.
Claims (1)
1. the method compensated for the tension optimization of roll-force regulation, for the control system of tandem mills, described cold
Continuous mill train possesses the most tactic multiple rolling machine frame；The control system of described tandem mills is according to cold company
The each device parameter of milling train group and rolling technological parameter, before and after determining, the reality of each section strip steel between adjacent each frame is opened
Power, determines the roll-force of each rolling machine frame；And
A. emulsion iron powder monitoring on same day concentration is obtained from cold continuous rolling set control system, according to emulsion iron powder prison on the same day
Survey concentration, calculate the coefficient of friction that each frame is corresponding；
B. according to actual tension and the calculated coefficient of friction of each section strip steel, the setting tension force of each section strip steel is adjusted；
According to setting tension force and the roll-force of each rolling machine frame, calculate each frame slip factor, minimum with incidence rate of skidding
Object function, is optimized compensation to setting tension force；
It is characterized in that the method that the described tension optimization for roll-force regulation compensates comprises the following steps:
S01: collect each device parameter and rolling technological parameter in the current operation of rolling, including each frame work roll diameter Dk、
Actual reduction ratio εk, actual tension Ts', the maximum tension T that allowed of unitmax, and strip material thickness h0, wide
Degree B, exit thickness h5, steel grade SG；Wherein, k is each frame numbering, k=1,2,3,4,5；S is each section
Power is numbered, s=0, and 1,2,3,4,5；
S02: given feature roll-force P*And safety coefficient α；
S03: given each section sets tension adjustment step value Δ Ts=Ts'/N, wherein, Ts' it is the actual tension of s section,
S=1,2,3,4, N is tension adjustment total step number, N=10～50；
S04: collect emulsion iron powder monitoring on same day concentration ρ from cold continuous rolling set control system；
S05: according to emulsion iron powder monitoring on same day concentration ρ, calculate the coefficientoffrictionμ that each frame is correspondingk, computation model
ForWherein, λkCoefficient, λ is affected for iron powder steel gradek=1 × e-6～1 × e-4, ωkAdvise for iron powder
Lattice affect coefficient, ωk=100～300, γkCoefficient, γ is affected for equipmentk=0.008～0.15；
S06: according to work roll diameter D of each framek, actual reduction ratio εk, strip material thickness h0, width B, go out
Mouth thickness h5With steel grade SG, determine that actual tension is Ts' time each frame roll-force Pk；
S07: ifThen proceed to step S08；Otherwise, each section is made to set tension force Ts=Ts', proceed to
Step S22；Wherein, s=1,2,3,4；
S08: make skidding object function initial value f0(X)=1010, skidding judge process parameter beta=1；
S09: order sets tension force T1=T1', T1Adjustment process factor i=0；
S10: order sets tension force T2=T2', T2Adjustment process factor j=0；
S11: order sets tension force T3=T3', T3Adjustment process factor m=0；
S12: order sets tension force T4=T4', T4Adjustment process factor n=0；
S13: be D according to each frame work roll diameterk, actual reduction ratio εk, strip material thickness h0, width B, go out
Mouth thickness h5With steel grade SG, determine and set tension force as TsTime each frame roll-force Pk；
S14: ifThen proceed to step S15；Otherwise, step S18 is proceeded to；
S15: according to work roll diameter D of each framek, actual reduction ratio εk, the setting tension force T of front and back adjacent racksWith
Roll-force P of each framek, calculate each frame slip factor ψk；
S16: calculate the target function value with the minimum target of skidding incidence rate
fβ(X)=A g1(X)+(1-A)·g2(X)；
Wherein:A is partition coefficient, 0 ＜ A ＜ 1；
X={T1,T2,T3,T4}；
S17: if fβ(X) ＜ fβ-1(X), then record is current sets tension force T1、T2、T3、T4, proceed to step S18；No
Then, f is madeβ(X)=fβ-1(X), β=β+1, proceed to step S18；
S18: if n is ＜ (Tmax-T4′)/ΔT4, then n=n+1, T are made4=T4′+n·ΔT4, proceed to step S13；Otherwise,
Proceed to step S19；
S19: if m is ＜ (Tmax-T3′)/ΔT3, then m=m+1, T are made3=T3′+m·ΔT3, proceed to step S12；Otherwise,
Proceed to step S20；
S20: if j is ＜ (Tmax-T2′)/ΔT2, then j=j+1, T are made2=T2′+j·ΔT2, proceed to step S11；Otherwise,
Proceed to step S21；
S21: if i is ＜ (Tmax-T1′)/ΔT1, then i=i+1, T are made1=T1′+i·ΔT1, proceed to step S10；Otherwise, turn
Enter step S22；
S22: output optimum setting tension force T1、T2、T3、T4；
S23: by tension force setting value T1、T2、T3、T4Send to cold continuous rolling set control system, regulate each interstand tension.
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| CN106707742A (en) * | 2015-12-01 | 2017-05-24 | 江苏九天光电科技有限公司 | Method for optimizing front and back tensions of turning roll suitable for nickel-plating continuous production line |
| CN106529037B (en) * | 2016-11-10 | 2019-05-28 | 燕山大学 | Continuous annealing process is to drop tension compensating method of the furnace roller roughness influence of fading as target |
| CN107695108B (en) * | 2017-09-28 | 2019-03-01 | 北京首钢自动化信息技术有限公司 | A kind of tensile stress dynamic compensation method improving rolling process stability |
| CN108787758A (en) * | 2018-04-17 | 2018-11-13 | 燕山大学 | Rolling technological parameter optimal setting method under the conditions of secondary cold-rolling unit small deformation |
| CN110756593B (en) * | 2018-07-26 | 2020-10-27 | 宝山钢铁股份有限公司 | Tension system optimization method for inhibiting vibration of cold continuous rolling unit |
| CN109877167B (en) * | 2019-03-28 | 2020-06-26 | 北京科技大学设计研究院有限公司 | Tension influence coefficient analysis method for improving rolling stability of degree of freedom |
| CN112588840B (en) * | 2020-11-26 | 2022-01-14 | 燕山大学 | Rolling force compensation method and system suitable for cold continuous rolling unit |
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