CN104289530B - Emulsion flow allocation method between the frame of two-shipper stand four-high rolling mill - Google Patents
Emulsion flow allocation method between the frame of two-shipper stand four-high rolling mill Download PDFInfo
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- CN104289530B CN104289530B CN201310304121.0A CN201310304121A CN104289530B CN 104289530 B CN104289530 B CN 104289530B CN 201310304121 A CN201310304121 A CN 201310304121A CN 104289530 B CN104289530 B CN 104289530B
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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
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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
- B21B2037/002—Mass flow control
Abstract
Present invention is disclosed emulsion flow allocation method between a kind of frame of two-shipper stand four-high rolling mill, including：Parameter acquisition step, the parameter gathered in parameter acquisition step includes：Device parameter, the parameter of band to be rolled, rolling technological parameter and technological lubrication parameter；Initialization step, is initialized to control variable；Assignment of traffic step, assignment of traffic step cycle is performed, and the first frame and the assignment of traffic of the emulsion of the second frame are adjusted with the slip factor of the second frame, Oscillating Coefficients, draught pressure and rolling power according to the first frame；Each assignment of traffic to the first frame and the emulsion of the second frame detects whether to meet exit criteria after being adjusted wherein in assignment of traffic step, current assignment of traffic continues cycling through traffic allocation step as optimal emulsification flow quantity if exit criteria is unsatisfactory for if exit criteria is met.
Description
Technical field
The present invention relates to band processing technology, more particularly to a kind of pair being used for during high level automobile sheet cold-rolling process
Emulsion optimum rate of flow distribution method between frame in the cold-rolled process of frame four-high mill.
Background technology
In recent years, with the fast development of auto industry, automobile production enterprise is to the quality of automobile board and wanting for yield
Seek more and more higher.For steel production enterprise and steel sale enterprise, in face of automobile production enterprise requirement and meaning
See, it is necessary to which quality and yield to automobile board are improved.Automobile board is to be processed to be formed by band, improves quality and yield
Major way by two kinds：Upgrading is carried out to production equipment or production process is improved.
Improvement cost height, transformation cycle for production equipment is long, often influences the market supply of enterprise, or even can make
Into the loss of client, so typically not considering to transform production equipment on a large scale easily.So, how to set not increasing
On the basis of standby improvement cost, existing equipment is made full use of, the high-grade automobile of unit is improved by improving production process
The production yields and quality of plate, meeting the demand that market expands day by day to high level automobile sheet just turns into iron and steel enterprise's research of technique
Focus.
In the cold-rolled process of two-shipper stand four-high rolling mill high level automobile sheet, in order to ensure rolling be smoothed out, it is necessary to
A certain amount of emulsion is sprayed into roll gap, for cooling down and lubricating.And the flow of the effect of cooling and lubrication then with emulsion
It is closely related.Correspond to therewith, the degree of the heat slid wound defect of the quality of emulsion cooling effect then during influence of rolled and general
Rate, and emulsion lubrication effect then has influence on the probability for skidding and vibrating in the operation of rolling and occur.Particularly, in rolling schedule
With the technological lubrication parameter such as quality, concentration, the temperature of the rolling technological parameter such as tension schedule and emulsion it is given on the premise of,
Lubrication and the effect of cooling then depend primarily on the flow of emulsion.That is can by reasonably setting the flow of emulsion
To be effectively reduced the probability that skidding, heat slid wound and vibration occur.For two-shipper stand four-high rolling mill, two frames share one
Set emulsification liquid supply system, General System only gives total flow, and to often basis before the distribution of flow between two frames
Experience uses arbitrary proportioning, reasonably distributes flow the characteristics of not according to two frames, causes that unit skids, heat slid wound shakes
The probability that the defect such as dynamic occurs is higher.So, two machines how reasonably to be distributed in the case where total emulsification flow quantity is given
Emulsification flow quantity between frame just turns into the emphasis of scene tackling key problem with the probability for reducing skidding, heat slid wound and vibration.
The content of the invention
The present invention is directed to propose emulsion flow allocation method between a kind of frame of two-shipper stand four-high rolling mill, including：
Parameter acquisition step, the parameter gathered in parameter acquisition step includes：The ginseng of device parameter, band to be rolled
Number, rolling technological parameter and technological lubrication parameter；
Initialization step, is initialized to control variable；
Assignment of traffic step, assignment of traffic step cycle is performed, and slip factor according to the first frame and the second frame, is shaken
Dynamic coefficient, draught pressure and rolling power are adjusted to the first frame and the assignment of traffic of the emulsion of the second frame；
The first frame and the assignment of traffic of the emulsion of the second frame are adjusted every time wherein in assignment of traffic step
Detect whether to meet exit criteria after whole, if exit criteria is met current assignment of traffic as optimal emulsification flow quantity,
Traffic allocation step is continued cycling through if exit criteria is unsatisfactory for.
In one embodiment, the device parameter gathered in the parameter acquisition step includes：First frame and the second machine
The work roll diameter of frameThe maximum draught pressure P of milling train of first frame and the second frame1max、P2max, the first frame
With the maximum rolling power F of milling train of the second frame1max、F2max.The parameter of the band to be rolled gathered in the parameter acquisition step
Including：The width B of band, the thickness h of band0', the elastic modulus E of band；The Poisson's ratio v of band；The initial deformation of band resists
Power σs0；Resistance of deformation coefficient of intensification k.The rolling technological parameter gathered in the parameter acquisition step includes：First frame and the
The reduction ratio ε of two frames1、ε2, the band exit thickness h of the first frame and the second frame1,h2, backward pull setting value T0, forward pull
Setting value T1, middle tension force setting value Tz；The mill speed V of first frame and the second frame1,V2, it is critical slip factor ψ *, critical
Slip injury indexThreshold vibration coefficient φ *.The technological lubrication parameter gathered in the parameter acquisition step includes：Emulsion is supplied
Give system total flow flow, the temperature T of emulsionwd, the concentration C of emulsion.
In one embodiment, initialization step includes：
Involved procedure parameter during setting emulsion assignment of traffic, including：Emulsify flow quantity control variable F；Control
The initial value of variable processed is F0；The emulsification flow quantity search procedure parameter flow of first frame and the second frame11,flow1、
flow22,flow2；The emulsion optimum flow distribution flow of first frame and the second frame1y、flow2y；The emulsification of first frame
Flow quantity accounts for the ratio lambda of emulsion total flow1；Step-size in search Δ λ；Search procedure parameter m；First frame is beaten with the second frame
Sliding factor ψ1,ψ2；The slip injury index of first frame and the second frameThe Oscillating Coefficients φ of first frame and the second frame1,
φ2；The friction coefficient μ of first frame and the second frame1,μ2；The resistance of deformation σ of first frame and the second frames1,σs2；First
The roll-force P of frame and the second frame1,P2；First frame and the second frame rolling power F1,F2；
Set F0=100000, m=0, Δ λ=0.01；
The emulsification flow quantity for setting the first frame accounts for the ratio lambda of emulsion total flow1=0.1+m Δs λ.
In one embodiment, in assignment of traffic step：
Calculate the emulsification flow quantity flow of the first frame and the second frame1=flow* λ1、flow2=flow* (1- λ1)；
Calculate the first frame and the resistance of deformation σ of the second frame strip under the conditions of current pressures1、σs2。
In one embodiment, in assignment of traffic step：
Calculate the coefficient of friction of the first frame and the second frame under current pressure condition, technological lubrication and mill speed
μ1,μ2；
Calculate the rolling pressure of the first frame and the second frame under currently pressure condition, tension force, technological lubrication and mill speed
Power P1,P2, the rolling power F of the first frame and the second frame1,F2；
Judge inequalityWhether set up simultaneously.
Calculate the skidding of the first frame and the second frame under current pressure condition, tension force, technological lubrication and mill speed because
Sub- ψ1,ψ2；Calculate slip factor model be：Wherein ψ is slip factor, T1、T0For front and rear
Power, R' is that working roll flattens radius, and P is total draught pressure, and μ is coefficient of friction, and Δ h is drafts；
The sliding injury for calculating the first frame and the second frame under current pressure condition, tension force, technological lubrication and mill speed refers to
NumberCalculate slip injury index model be：WhereinFor slip injury index, ξ is contact in rolling lubricating oil film equivalent
Thickness, the lubricating oil film equivalent depth of the critical heat slid wound states of ξ '；
Calculate the first frame and the second frame under currently pressure condition, tension schedule, technological lubrication system and mill speed
Oscillating Coefficients φ1,φ2, calculate Oscillating Coefficients model be：Wherein φ is Oscillating Coefficients,
E is modulus of elasticity, and v is rolled piece muzzle velocity, rmFor average reduction ratio, σcFor band yield limit, TcFor mean tension, L is phase
Distance between adjacent frame, h0For rolled piece inlet thickness, ω is system frequency, and R is working roll radius；
Judge inequalityWhether set up simultaneously.
In one embodiment, detect whether that meeting exit criteria includes：
Calculate slip factor average Fψav, slip injury index averageWith Oscillating Coefficients average Fφav,
Calculate emulsification flow quantity control variable F：
Wherein α, β are weight coefficient, α=0.15~0.45, β=0.15~0.45；；
Judge inequality F ＜ F0Whether set up, if inequality is set up, then it is assumed that meet exit criteria.
In one embodiment, the optimal emulsification flow quantity flow of the first frame is exported if exit criteria is met1y=
flow11, the optimal emulsification flow quantity flow of the second frame2y=flow22。
The present invention fully takes into account the equipment and technology feature of two-shipper stand four-high rolling mill high level automobile sheet rolling, with two-shipper
Skidding, heat slid wound and the vibration probability of happening all minimums of two frames of stand four-high rolling mill are used as object function, it is proposed that Yi Taoshi
The emulsion flow optimization establishing method rolled together in two-shipper stand four-high rolling mill high level automobile sheet.This method is rolled by Stand Mill
The integrated optimization and setting of flow quantity is emulsified between machine frame, skidding, heat slid wound and vibration failure can be farthest reduced
Probability of happening, so as to effectively improve product quality and production efficiency.
Brief description of the drawings
The embodiment to the present invention does further specific description in detail below in conjunction with the accompanying drawings.
Fig. 1 discloses the structural representation of the emulsion spray system of two-shipper stand four-high rolling mill.
Fig. 2 discloses emulsion assignment of traffic side between the frame according to the two-shipper stand four-high rolling mill of one embodiment of the invention
The flow chart implemented of method.
Embodiment
Fig. 1 discloses the structural representation of the emulsion spray system of two-shipper stand four-high rolling mill.In two-shipper stand four-high rolling mill
100 are disposed about several emulsion sprays first 102, and the first 102 sprinkling emulsion of these emulsion sprays is to the rolling of Stand Mill four
Band on machine 100 is cooled down and lubricated.
To the basic of distribution of flow between two frames in the conventional two-shipper stand four-high rolling mill high level automobile sheet operation of rolling
Experience uses arbitrary proportioning, reasonably distributes flow the characteristics of not according to two frames, causes that unit skids, heat slid wound shakes
The probability that the defect such as dynamic occurs is higher.The present invention provides one kind and is suitable for emulsion between two-shipper stand four-high rolling mill cold-rolled process frame
Optimum rate of flow distribution method, the generation that can farthest reduce skidding, heat slid wound and vibration failure by the technology is general
Rate, so as to effectively improve product quality and production efficiency.
In order to realize the above object the present invention proposes emulsion assignment of traffic side between a kind of frame of two-shipper stand four-high rolling mill
Method, including the steps：
Parameter acquisition step, the parameter gathered in parameter acquisition step includes：The ginseng of device parameter, band to be rolled
Number, rolling technological parameter and technological lubrication parameter.In one embodiment, the equipment ginseng gathered in the parameter acquisition step
Number includes：The work roll diameter of first frame and the second frameThe milling train maximum of first frame and the second frame is rolled
Pressing pressure P1max、P2max, the maximum rolling power F of milling train of the first frame and the second frame1max、F2max.The parameter acquisition step
The parameter of the band to be rolled of middle collection includes：The width B of band, the thickness h of band0', the elastic modulus E of band；Band
Poisson's ratio v；The initial deformation drag σ of bands0；Resistance of deformation coefficient of intensification k.The rolling work gathered in the parameter acquisition step
Skill parameter includes：The reduction ratio ε of first frame and the second frame1、ε2, the band exit thickness h of the first frame and the second frame1,
h2, backward pull setting value T0, forward pull setting value T1, middle tension force setting value Tz；The mill speed V of first frame and the second frame1,
V2, critical slip factor ψ *, critical slip injury indexThreshold vibration coefficient φ *.The work gathered in the parameter acquisition step
Skill lubrication parameter includes：Emulsify liquid supply system total flow flow, the temperature T of emulsionwd, the concentration C of emulsion.
Initialization step, is initialized to control variable.In one embodiment, initialization step includes：Setting breast
Change procedure parameter involved in flow quantity assigning process, including：Emulsify flow quantity control variable F；Control the initial value of variable
For F0；The emulsification flow quantity search procedure parameter flow of first frame and the second frame11,flow1、flow22,flow2；First machine
Frame and the emulsion optimum flow of the second frame distribution flow1y、flow2y；The emulsification flow quantity of first frame accounts for emulsion and always flowed
The ratio lambda of amount1；Step-size in search Δ λ；Search procedure parameter m；The slip factor ψ of first frame and the second frame1,ψ2；First machine
The slip injury index of frame and the second frameThe Oscillating Coefficients φ of first frame and the second frame1,φ2；First frame and second
The friction coefficient μ of frame1,μ2；The resistance of deformation σ of first frame and the second frames1,σs2；First frame is rolled with the second frame
Power P processed1,P2；First frame and the second frame rolling power F1,F2；Set F0=100000, m=0, Δ λ=0.01；Setting the
The emulsification flow quantity of one frame accounts for the ratio lambda of emulsion total flow1=0.1+m Δs λ.
Assignment of traffic step, assignment of traffic step cycle is performed, and slip factor according to the first frame and the second frame, is shaken
Dynamic coefficient, draught pressure and rolling power are adjusted to the first frame and the assignment of traffic of the emulsion of the second frame.One
In individual embodiment, in assignment of traffic step：
Calculate the emulsification flow quantity flow of the first frame and the second frame1=flow* λ1、flow2=flow* (1- λ1)；
Calculate the first frame and the resistance of deformation σ of the second frame strip under the conditions of current pressures1、σs2。
Calculate the coefficient of friction of the first frame and the second frame under current pressure condition, technological lubrication and mill speed
μ1,μ2；
Calculate the rolling pressure of the first frame and the second frame under currently pressure condition, tension force, technological lubrication and mill speed
Power P1,P2, the rolling power F of the first frame and the second frame1,F2；
Judge inequalityWhether set up simultaneously.
Calculate the skidding of the first frame and the second frame under current pressure condition, tension force, technological lubrication and mill speed because
Sub- ψ1,ψ2；Calculate slip factor model be：Wherein ψ is slip factor, T1、T0For front and rear
Power, R' is that working roll flattens radius, and P is total draught pressure, and μ is coefficient of friction, and Δ h is drafts；
The sliding injury for calculating the first frame and the second frame under current pressure condition, tension force, technological lubrication and mill speed refers to
NumberCalculate slip injury index model be：WhereinFor slip injury index, ξ is contact in rolling lubricating oil film equivalent
Thickness, the lubricating oil film equivalent depth of the critical heat slid wound states of ξ '；
Calculate the first frame and the second frame under currently pressure condition, tension schedule, technological lubrication system and mill speed
Oscillating Coefficients φ1,φ2, calculate Oscillating Coefficients model be：Wherein φ is Oscillating Coefficients,
E is modulus of elasticity, and v is rolled piece muzzle velocity, rmFor average reduction ratio, σcFor band yield limit, TcFor mean tension, L is phase
Distance between adjacent frame, h0For rolled piece inlet thickness, ω is system frequency, and R is working roll radius；
Judge inequalityWhether set up simultaneously.
The first frame and the assignment of traffic of the emulsion of the second frame are adjusted every time wherein in assignment of traffic step
Detect whether to meet exit criteria after whole, if exit criteria is met current assignment of traffic as optimal emulsification flow quantity,
Traffic allocation step is continued cycling through if exit criteria is unsatisfactory for.In one embodiment, detect whether that satisfaction is exited
Condition includes：
Calculate slip factor average Fψav, slip injury index averageWith Oscillating Coefficients average Fφav,
Calculate emulsification flow quantity control variable F：
Wherein α, β are weight coefficient, α=0.15~0.45, β=0.15~0.45；；
Judge inequality F<F0Whether set up, if inequality is set up, then it is assumed that meet exit criteria.
In one embodiment, the optimal emulsification flow quantity flow of the first frame is exported if exit criteria is met1y=
flow11, the optimal emulsification flow quantity flow of the second frame2y=flow22。
The flow chart that Fig. 2 disclose this method one implements, at this in the specific implementation, performing following process：
(1) device parameter of the two-shipper stand four-high rolling mill of flow quantity optimization distribution to be emulsified is collected, including：First frame with
Second frame work roll diameterFirst frame and the maximum draught pressure P of the second machine frame rolling mill1max、P2max, the first machine
Frame and the maximum rolling power F of the second machine frame rolling mill1max、F2max。
(2) parameter of band to be rolled is collected, including：The width B of band；The thickness h of strip material0；The elasticity of band
Modulus E；The Poisson's ratio v of band；The initial deformation drag σ of bands0；Resistance of deformation coefficient of intensification k.
(3) rolling technological parameter, including the first frame, the second frame reduction ratio ε are collected1、ε2；First frame, the second frame
Band exit thickness h1,h2；Backward pull setting value T0, forward pull setting value T1, middle tension force setting value Tz；First frame, the second machine
Frame mill speed V1,V2；Critical slip factor ψ *, critical slip injury indexThreshold vibration coefficient φ *.
(4) collection process lubrication parameter, including：Emulsify liquid supply system total flow flow；The temperature T of emulsionwd；Emulsification
The concentration C of liquid.
(5) procedure parameter involved in setting emulsion optimization assigning process：Emulsify flow quantity control variable F；Control
The initial value of variable is F0；First frame and the flow search procedure parameter flow of the second frame emulsion11,flow1、flow22,
flow2；First frame and the optimum flow distribution flow of the second frame emulsion1y、flow2y；The flow of first frame emulsion
Account for the ratio lambda of emulsion total flow1；Step-size in search Δ λ；Search procedure parameter m；First frame, the second frame slip factor ψ1,
ψ2；First frame, the second frame slip injury indexFirst frame, the second frame vibration coefficient φ1,φ2；First frame,
Two frame friction coefficient μs1,μ2；First frame, the second stand stretch drag σs1,σs2；First frame, the second frame roll-force P1,
P2；First frame, the second frame rolling power F1,F2。
(6) F is set0=100000, m=0, Δ λ=0.01.
(7) consider in live actual production, the flow of the first frame emulsion accounts for total flow ratio and is not less than 0.1,
Therefore the flow of the first frame emulsion of setting accounts for the ratio lambda of emulsion total flow1=0.1+m Δs λ.
(8) the flow flow of each frame emulsion is calculated1=flow* λ1、flow2=flow* (1- λ1)。
(9) the first frame, the resistance of deformation σ of the second frame strip under the conditions of current pressure are calculateds1、σs2。
(10) the first frame under current pressure condition, technological lubrication system and mill speed, the second frame is calculated to rub
Wipe coefficient μ1,μ2.Calculate coefficient of friction and use following model：
(11) the first frame, the second machine under currently pressure condition, tension schedule, technological lubrication system and mill speed are calculated
The draught pressure P of frame1,P2, rolling power F1,F2。
The computation model of wherein draught pressure isWherein
R ' is flattening radius, qmFor equivalent tension force.
The computation model of wherein rolling power isWherein η is electric efficiency, vrFor roll rotational speed (m/
Min), R is roller diameter (m), and N is roll torque.
(12) inequality is judgedWhether set up simultaneously；If set up, step (13) is transferred to, is otherwise turned
Enter step (20)；
(13) the first frame, the second machine under currently pressure condition, tension schedule, technological lubrication system and mill speed are calculated
The slip factor ψ of frame1,ψ2；The basic model of wherein slip factor is：In formula ψ be skidding because
Son, T1、T0For front and rear tension force, R' is that working roll flattens radius, and P is total draught pressure, and μ is coefficient of friction, and Δ h is drafts.
(14) the first frame, the second machine under currently pressure condition, tension schedule, technological lubrication system and mill speed are calculated
The slip injury index of frameThe basic model of wherein slip injury index is：WhereinFor slip injury index, ξ is rolling deformation
Area's lubricating oil film equivalent depth, the lubricating oil film equivalent depth of the critical heat slid wound states of ξ '.
(15) the first frame, the second machine under currently pressure condition, tension schedule, technological lubrication system and mill speed are calculated
The Oscillating Coefficients φ of frame1,φ2, wherein Oscillating Coefficients basic model is：φ is vibration in formula
Coefficient, E is modulus of elasticity, and v is rolled piece muzzle velocity, rmFor average reduction ratio, σcFor band yield limit, TcFor mean tension,
L is distance, h between adjacent rack0For rolled piece inlet thickness, ω is system frequency, and R is working roll radius.
(16) inequality is judgedWhether set up simultaneously；If inequality is set up, step (17) is transferred to, otherwise
It is transferred to step (20).
(17) slip factor average F is calculatedψav, heat slid wound Mean value of indexWith Oscillating Coefficients average Fφav,
(18) emulsification flow quantity control variable F is calculated,
Wherein α, β are weight coefficient, α=0.15~0.45, β=0.15~0.45；
(19) inequality F ＜ F are judged0Whether set up；If inequality is set up, F is made0=F, flow11=flow1,
flow22=flow2, it is transferred to step (20)；If inequality is invalid, step (20) is transferred to.
(20) judge whether inequality m ＜ 80 set up；If inequality is set up, m=m+1 is made, step (g) is transferred to；Such as
Fruit inequality is invalid, then is transferred to step (21).
(21) the optimal emulsification flow quantity flow of the first frame is exported1y=flow11；The optimal pressure flow of second frame2y
=flow22, complete emulsion optimum rate of flow distribution between two-shipper stand four-high rolling mill cold-rolled process frame.
First implements
By taking certain milling train of Stand Mill 1420 as an example, the high level automobile sheet rolling pressure of specific standard is described by means of Fig. 2
Setting process.
In order to realize the above object the present invention uses following technical scheme：It is cold rolling that one kind is suitable for two-shipper stand four-high rolling mill
Emulsion optimum rate of flow distribution method between process frame, including it is following the step of can be performed by computer：
First, in step 1, the device parameter of the two-shipper stand four-high rolling mill of liquid optimization distribution to be emulsified is collected, including：The
One frame and the second frame work roll diameterFirst frame is maximum with the second machine frame rolling mill
Draught pressure P1max=1800t, P2max=1800t, the first frame and the maximum rolling power F of the second machine frame rolling mill1max=
4000Kw、F2max=4000Kw；
Then, in step 2, the parameter of band to be rolled is collected, including：The width B=1200mm of band；Strip material
Thickness h0=0.9mm；Elastic modulus E=2.1 × 10 of band5MPa；The Poisson's ratio v=0.3 of band；The initial deformation of band
Drag σs0=420MPa；Resistance of deformation coefficient of intensification k=1.3；
Then, rolling technological parameter is collected in step 3, including：First frame, the second frame reduction ratio ε1=0.254,
ε2=0.255；First frame, the second frame band exit thickness h1=0.6714, h2=0.5；Backward pull setting value T0=
80MPa, forward pull setting value T1=155MPa, middle tension force setting value Tz=160MPa；First frame, the second frame mill speed
V1=521m/min, V2=700m/min；Critical slip factor ψ *=0.4, critical slip injury indexThreshold vibration system
Number φ *=0.87；
Then, in step 4, collection process lubrication parameter, including：Emulsify liquid supply system total flow flow=6500L/
(min·m2)；The temperature T of emulsionwd=55 DEG C；Concentration C=2% of emulsion；
Then, in steps of 5, procedure parameter involved in setting emulsion optimization assigning process：Emulsify flow quantity excellent
Change distribution object function F；The initial value of object function is F0；First frame and the flow search procedure of the second frame emulsion are joined
Number flow11,flow1、flow22,flow2；First frame and the optimum flow distribution flow of the second frame emulsion1y、flow2y；
The flow of first frame emulsion accounts for the ratio lambda of emulsion total flow1；Step-size in search Δ λ；Search procedure parameter m；First machine
Frame, the second frame slip factor ψ1,ψ2；First frame, the second frame slip injury indexFirst frame, the second frame vibration
Coefficient φ1,φ2；First frame, the second frame friction coefficient μ1,μ2；First frame, the second stand stretch drag σs1,σs2；First
Frame, the second frame roll-force P1,P2；First frame, the second frame rolling power F1,F2；
Then, in step 6, F is made0=100000, m=0, Δ λ=0.01；
Then, in step 7, it is contemplated that in live actual production, the flow of the first frame emulsion accounts for total flow ratio
0.1 is not less than, therefore makes the flow of the first frame emulsion account for the ratio lambda of emulsion total flow1=0.1+m Δs λ=
0.1；
Then, in step 8, the flow flow of each frame emulsion is calculated1=flow* λ1=650L/ (minm2)、
flow2=flow* (1- λ1)=5850L/minm2；
Then, in step 9, the first frame, the resistance of deformation σ of the second frame strip under the conditions of current pressure are calculateds1
=635.22MPa, σs2=709.48MPa；
Then, in step 10, calculate the first frame under current pressure condition, technological lubrication system and mill speed,
The friction coefficient μ of second frame1=0.116, μ2=0.0255；
Then, in a step 11, the is calculated under current pressure condition, tension schedule, technological lubrication system and mill speed
The draught pressure P of one frame, the second frame1=1151.43t, P2=648.85t, rolling power F1=3551.82Kw, F2=
2358.15Kw；
Then, in step 12, inequality is judgedWhether set up simultaneously；Obvious inequality is set up, and is transferred to
Step 13；
Then, in step 13, the is calculated under current pressure condition, tension schedule, technological lubrication system and mill speed
The slip factor ψ of one frame, the second frame1=0.06, ψ2=0.45；
Then, at step 14, the is calculated under current pressure condition, tension schedule, technological lubrication system and mill speed
The slip injury index of one frame, the second frame
Then, in step 15, current pressure condition, tension schedule, technological lubrication system are calculated
And under mill speed the first frame, the second frame Oscillating Coefficients φ1=0.05, φ2=0.48；
Then, in step 16, inequality is judgedWhether set up simultaneously；Obvious inequality is invalid, is transferred to step
Rapid 20；
Then, in step 17, it is respectively F to calculate slip factor, heat slid wound index, Oscillating Coefficients mean value functionψav、Fφav；
Then, in step 18, emulsion optimum rate of flow distribution object function is calculated
,
Wherein α, β are weight coefficient, α=0.4, β=0.3；
Then, in step 19, inequality F ＜ F are judged0Whether set up；If inequality is set up, F is made0=F,
flow11=flow1, flow22=flow2, it is transferred to step 20；If inequality is invalid, step 20 is directly transferred to；
Then, in step 20, judge whether inequality m ＜ 80 set up；Obvious inequality is set up, and makes m=m+1=1, is turned
Enter step 7；
Then, in step 21, the optimal emulsification flow quantity flow of the first frame is exported1y=flow11=3800L/
(min·m2), the optimal emulsification flow quantity flow of the second frame2y=flow22=2700L/ (minm2), complete Stand Mill four
Emulsion optimum rate of flow distribution between roller mill cold-rolled process frame.
Compare for convenience, as shown in table 1, the emulsification drawn using the method for the invention and conventional method is provided respectively
Flow quantity distribution condition, and the contrast that the front and rear slip factor of optimization, slip injury index, Oscillating Coefficients are carried out respectively；Can from table
To find out, the object function for characterizing the probability of happening of skidding, heat slid wound and vibration failure drops to 0.0532 from 0.150, under
64.5% has been dropped, the probability that defect occurs in production process is controlled well.
The relevant parameter contrast table that certain milling train of Stand Mill 1420 present invention of table 1 is obtained with conventional method
Second implements
For the implementation process of further instruction this patent, then by taking certain milling train of Stand Mill 1550 as an example, come by means of Fig. 2
Emulsion optimum rate of flow distribution process between two-shipper stand four-high rolling mill cold-rolled process frame is described.
First, in step 1, the device parameter of the four-high mill of Stand Mill 1550 of distribution to be optimized is collected, including：First
Frame and the second frame work roll diameterFirst frame is rolled with the second machine frame rolling mill maximum
Pressing pressure P1max=2000t, P2max=2000t, the first frame and the maximum rolling power F of the second machine frame rolling mill1max=4500Kw,
F2max=4500Kw；
Then, in step 2, the parameter of band to be rolled is collected, including：The width B=1320mm of band；Strip material
Thickness h0=1.20mm；Elastic modulus E=2.1 × 10 of band5MPa；The Poisson's ratio v=0.3 of band；The initial change of band
Shape drag σs0=350MPa；Resistance of deformation coefficient of intensification k=1.3；
Then, rolling technological parameter is collected in step 3, including：First frame, the second frame reduction ratio ε1=0.286,
ε2=0.241；First frame, the second frame band exit thickness h1=0.8568, h2=0.65；Backward pull setting value T0=
100MPa, forward pull setting value T1=190MPa, middle tension force setting value Tz=165MPa；First frame, the second frame mill speed
V1=455m/min, V2=600m/min；Critical slip factor ψ *=0.38, critical slip injury indexThreshold vibration system
Number φ *=0.85；
Then, in step 4, collection process lubrication parameter, including：Emulsify liquid supply system total flow flow=7000L/
(min·m2)；The temperature T of emulsionwd=55 DEG C；Concentration C=2% of emulsion；
Then, in steps of 5, procedure parameter involved in emulsion optimization assigning process is defined：Emulsify flow quantity excellent
Change distribution object function F；The initial value of object function is F0；First frame and the flow search procedure of the second frame emulsion are joined
Number flow11,flow1、flow22,flow2；First frame and the optimum flow distribution flow of the second frame emulsion1y、flow2y；
The flow of first frame emulsion accounts for the ratio lambda of emulsion total flow1；Step-size in search Δ λ；Search procedure parameter m；First machine
Frame, the second frame slip factor ψ1,ψ2；First frame, the second frame slip injury indexFirst frame, the second frame vibration
Coefficient φ1,φ2；First frame, the second frame friction coefficient μ1,μ2；First frame, the second stand stretch drag σs1,σs2；First
Frame, the second frame roll-force P1,P2；First frame, the second frame rolling power F1,F2；
Then, in step 6, F is made0=100000, m=0, Δ λ=0.01；
Then, in step 7, it is contemplated that in live actual production, the flow of the first frame emulsion accounts for total flow ratio
0.1 is not less than, therefore makes the flow of the first frame emulsion account for the ratio lambda of emulsion total flow1=0.1+m Δs λ=
0.1；
Then, in step 8, the flow flow of each frame emulsion is calculated1=flow* λ1=700L/ (minm2)、
flow2=flow* (1- λ1)=6300L/minm2；
Then, in step 9, the first frame, the resistance of deformation σ of the second frame strip under the conditions of current pressure are calculateds1
=575.63MPa, σs2=645.02MPa；
Then, in step 10, calculate the first frame under current pressure condition, technological lubrication system and mill speed,
The friction coefficient μ of second frame1=0.118, μ2=0.032；
Then, in a step 11, the is calculated under current pressure condition, tension schedule, technological lubrication system and mill speed
The draught pressure P of one frame, the second frame1=1032.35t, P2=648.22t, rolling power F1=3954.67Kw, F2=
2840.73Kw；
Then, in step 12, inequality is judgedWhether set up simultaneously；Obvious inequality is set up, and is transferred to
Step 13；
Then, in step 13, the is calculated under current pressure condition, tension schedule, technological lubrication system and mill speed
The slip factor ψ of one frame, the second frame1=0.07, ψ2=0.34；
Then, at step 14, the is calculated under current pressure condition, tension schedule, technological lubrication system and mill speed
The slip injury index of one frame, the second frame
Then, in step 15, the is calculated under current pressure condition, tension schedule, technological lubrication system and mill speed
The Oscillating Coefficients φ of one frame, the second frame1=0.05, φ2=0.53；
Then, in step 16, inequality is judgedWhether set up simultaneously；Obvious inequality is invalid, is transferred to
Step 20；
Then, in step 17, it is respectively F to calculate slip factor, heat slid wound index, Oscillating Coefficients mean value functionψav、Fφav；
Then, in step 18, emulsion optimum rate of flow distribution object function is calculated
Wherein α, β are weight coefficient, α=0.4, β=0.3；
Then, in step 19, inequality F ＜ F are judged0Whether set up；If inequality is set up, F is made0=F,
flow11=flow1, flow22=flow2, it is transferred to step 20；If inequality is invalid, step 20 is directly transferred to；
Then, in step 20, judge whether inequality m ＜ 80 set up；Obvious inequality is set up, and makes m=m+1=1, is turned
Enter step 7；
Then, in step 21, the optimal emulsification flow quantity flow of the first frame is exported1y=flow11=4000L/
(min·m2), the optimal emulsification flow quantity flow of the second frame2y=flow22=3000L/ (minm2), complete Stand Mill four
Emulsion optimum rate of flow distribution between roller mill cold-rolled process frame.
Compare for convenience, as shown in table 2, the emulsification drawn using the method for the invention and conventional method is provided respectively
Flow quantity distribution condition, and the contrast that the front and rear slip factor of optimization, slip injury index, Oscillating Coefficients are carried out respectively；Can from table 2
To find out, the object function for characterizing the probability of happening of skidding, heat slid wound and vibration failure drops to 0.103, decline from 0.219
53.0%, well control the probability that defect occurs in production process.
The relevant parameter contrast table that certain milling train of Stand Mill 1550 present invention of table 2 is obtained with conventional method
The present invention fully takes into account the equipment and technology feature of two-shipper stand four-high rolling mill high level automobile sheet rolling, with two-shipper
Skidding, heat slid wound and the vibration probability of happening all minimums of two frames of stand four-high rolling mill are used as object function, it is proposed that Yi Taoshi
The emulsion flow optimization establishing method rolled together in two-shipper stand four-high rolling mill high level automobile sheet.This method is rolled by Stand Mill
The integrated optimization and setting of flow quantity is emulsified between machine frame, skidding, heat slid wound and vibration failure can be farthest reduced
Probability of happening, so as to effectively improve product quality and production efficiency.
Claims (4)
1. emulsion flow allocation method between a kind of frame of two-shipper stand four-high rolling mill, it is characterised in that including：
Parameter acquisition step, the parameter gathered in parameter acquisition step includes：Device parameter, the parameter of band to be rolled, roll
Technological parameter processed and technological lubrication parameter；
Initialization step, is initialized to control variable；
Assignment of traffic step, assignment of traffic step cycle is performed, slip factor, vibration system according to the first frame with the second frame
Number, draught pressure and rolling power are adjusted to the first frame and the assignment of traffic of the emulsion of the second frame；
After each assignment of traffic to the first frame and the emulsion of the second frame is adjusted wherein in assignment of traffic step
Detect whether to meet exit criteria, if exit criteria is met current assignment of traffic as optimal emulsification flow quantity, if
It is unsatisfactory for exit criteria and then continues cycling through traffic allocation step；
The device parameter gathered in the parameter acquisition step includes：The work roll diameter of first frame and the second frameThe maximum draught pressure P of milling train of first frame and the second frame1max、P2max, the first frame rolls with the second frame
Machine maximum rolling power F1max、F2max；
The parameter of the band to be rolled gathered in the parameter acquisition step includes：The width B of band, the thickness h of band0', band
The elastic modulus E of material；The Poisson's ratio v of band；The initial deformation drag σ of bands0；Resistance of deformation coefficient of intensification k；
The rolling technological parameter gathered in the parameter acquisition step includes：The reduction ratio ε of first frame and the second frame1、ε2,
The band exit thickness h of first frame and the second frame1,h2, backward pull setting value T0, forward pull setting value T1, the setting of middle tension force
Value Tz；The mill speed V of first frame and the second frame1,V2, critical slip factor ψ *, critical slip injury indexThreshold vibration
Coefficient φ *；
The technological lubrication parameter gathered in the parameter acquisition step includes：Emulsify liquid supply system total flow flow, emulsion
Temperature Twd, the concentration C of emulsion.
2. emulsion flow allocation method between the frame of two-shipper stand four-high rolling mill as claimed in claim 1, it is characterised in that institute
Stating initialization step includes：
Involved procedure parameter during setting emulsion assignment of traffic, including：Emulsify flow quantity control variable F；Control becomes
The initial value of amount is F0；The emulsification flow quantity search procedure parameter flow of first frame and the second frame11,flow1、flow22,
flow2；The emulsion optimum flow distribution flow of first frame and the second frame1y、flow2y；The emulsification flow quantity of first frame
Account for the ratio lambda of emulsion total flow1；Step-size in search Δ λ；Search procedure parameter m；The slip factor of first frame and the second frame
ψ1,ψ2；The slip injury index of first frame and the second frameThe Oscillating Coefficients φ of first frame and the second frame1,φ2；The
The friction coefficient μ of one frame and the second frame1,μ2；The resistance of deformation σ of first frame and the second frames1,σs2；First frame with
The roll-force P of second frame1,P2；First frame and the second frame rolling power F1,F2；
Set F0=100000, m=0, Δ λ=0.01；
The emulsification flow quantity for setting the first frame accounts for the ratio lambda of emulsion total flow1=0.1+m Δs λ.
3. emulsion flow allocation method between the frame of two-shipper stand four-high rolling mill as claimed in claim 2, it is characterised in that stream
Measure in allocation step：
Calculate the emulsification flow quantity flow of the first frame and the second frame1=flow* λ1、flow2=flow* (1- λ1)；
Calculate the first frame and the resistance of deformation σ of the second frame strip under the conditions of current pressures1、σs2。
4. emulsion flow allocation method between the frame of two-shipper stand four-high rolling mill as claimed in claim 3, it is characterised in that stream
Measure in allocation step：
Calculate the friction coefficient μ of the first frame and the second frame under current pressure condition, technological lubrication and mill speed1,μ2；
Calculate the draught pressure P of the first frame and the second frame under currently pressure condition, tension force, technological lubrication and mill speed1,
P2, the rolling power F of the first frame and the second frame1,F2；
Judge inequalityWhether set up simultaneously；
If the inequality is set up simultaneously, calculate under current pressure condition, tension force, technological lubrication and mill speed the first frame with
The slip factor ψ of second frame1,ψ2；Calculate slip factor model be：Wherein ψ is skidding
The factor, T1、T0For front and rear tension force, R' is that working roll flattens radius, and P is total draught pressure, and μ is coefficient of friction, and Δ h is drafts；
Calculate the slip injury index of the first frame and the second frame under currently pressure condition, tension force, technological lubrication and mill speed
Calculate slip injury index model be：WhereinFor slip injury index, ξ is contact in rolling lubricating oil film equivalent depth, ξ '
The lubricating oil film equivalent depth of critical heat slid wound state；Calculate current pressure condition, tension schedule, technological lubrication system and rolling
The Oscillating Coefficients φ of first frame and the second frame under speed1,φ2, calculate Oscillating Coefficients model be：Wherein φ is Oscillating Coefficients, and E is modulus of elasticity, and v is rolled piece muzzle velocity, rmFor mean pressure
Lower rate, σcFor band yield limit, TcFor mean tension, L is distance, h between adjacent rack0For rolled piece inlet thickness, ω is system
Intrinsic frequency, R is working roll radius；
If the inequality is set up when different, judge whether inequality m ＜ 80 set up；If inequality is set up, m=m+1 is made,
And still calculate the flow proportional λ of the first frame emulsion1；If inequality is invalid, the optimal emulsification of the first frame is exported
Flow quantity flow1y=flow11；The optimal pressure flow of second frame2y=flow22, complete two-shipper stand four-high rolling mill cold-rolled process
Emulsion optimum rate of flow distribution between frame.
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| CN111036691A (en) * | 2018-10-14 | 2020-04-21 | 何定武 | Intelligent liquid supply control system for rolling mill |
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