CN108160724B - A kind of secondary cold-rolling unit emulsion spray frame top nozzle angle of heel optimization method - Google Patents

A kind of secondary cold-rolling unit emulsion spray frame top nozzle angle of heel optimization method Download PDF

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Publication number
CN108160724B
CN108160724B CN201711282257.0A CN201711282257A CN108160724B CN 108160724 B CN108160724 B CN 108160724B CN 201711282257 A CN201711282257 A CN 201711282257A CN 108160724 B CN108160724 B CN 108160724B
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nozzle
heel
optimization
emulsion
angle
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CN108160724A (en
Inventor
白振华
钱承
张立更
刘超智
刘亚星
崔亚亚
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Tangshan grano Metal Technology Co., Ltd
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Yanshan University
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21BROLLING OF METAL
    • B21B45/00Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B45/02Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
    • B21B45/0239Lubricating
    • B21B45/0245Lubricating devices
    • B21B45/0248Lubricating devices using liquid lubricants, e.g. for sections, for tubes
    • B21B45/0251Lubricating devices using liquid lubricants, e.g. for sections, for tubes for strips, sheets, or plates

Abstract

A kind of secondary cold-rolling unit emulsion spray frame top nozzle angle of heel optimization method, it is the following steps are included: technical parameter needed for the optimization of (A) collection nozzle angle of heel;(B) nozzle angle of heel optimization object function optimal value F is initializedy, and given optimization step-length;(C) optimization process parameter i=0 is initialized;(D) nozzle angle of heel is calculated;(E) emulsion of single-nozzle injection is calculated in strip width directional flow Density Distribution q1i(xj);(F) emulsion of N number of nozzle injection is calculated in the superimposed flow distribution q in strip width directionNi(xj);(G) secondary cold-rolling unit strip width range internal emulsification flow quantity cross direction profiles q is calculatedi(xj);(H) nozzle angle of heel optimization object function is calculated;(I) judgeIt is whether true;(J) judgeIt is whether true;(K) optimal value of secondary cold-rolling unit emulsion spray frame top nozzle angle of heel is exported.The present invention can be improved the uniformity of secondary cold-rolling unit belt steel surface emulsion flow distribution.

Description

A kind of secondary cold-rolling unit emulsion spray frame top nozzle angle of heel optimization method
Technical field
The invention belongs to cold rolling technology field, in particular to a kind of secondary cold-rolling unit emulsion spray frame top nozzle rolls Angle and optimizing method.
Background technique
Secondary cold-rolling refer to will be cold rolled annealed after strip carry out secondary rolling, be usually used in producing the cold rolling plating of thinner thickness Sheet tin raw sheet, secondary cold-rolling unit frequently with Stand Mill form, according to the difference of product specification, strip the first rack with 10%~40% reduction ratio carries out rolling and is thinned, smooth with 0.5%~1.0% elongation percentage progress in the second rack.In order to It realizes the biggish reduction ratio of the first rack, carries out rolling lubrication frequently with emulsion direct-injection lubricating system.During secondary cold-rolling, Emulsion is injected in belt steel surface by the nozzle being mounted on spraying rack, forms one layer of lubricating oil film, lubricating oil in belt steel surface Film enters contact in rolling with strip and carries out rolling lubrication.Since the jet width of single-nozzle is limited and jet width internal emulsification Liquid stream metric density is not uniformly distributed, therefore, it is necessary to use multiple nozzles to be mounted on spraying rack with certain spacing, by more Flux density is overlapped mutually between a nozzle, to realize the emulsion all standing of strip width.At the same time, in order to avoid each Flow field interferes in emulsion course of injection between nozzle, needs each nozzle being mounted on spraying rack with certain angle of heel On.However, the size of nozzle angle of heel not only influences the interference situation in each nozzle emulsion injection flow field, also affect each The emulsion of nozzle injection influences strip width direction rolling profit in the superimposed uniformity of belt steel surface flux density The sliding uniformity with surface quality.As such, it is desirable to study secondary cold-rolling unit spraying rack top nozzle angle of heel and the emulsification of each nozzle The correlation of uniformity after the correlation and flux density superposition in liquid injection flow field, on this basis to nozzle angle of heel Setting is optimized, to improve the uniformity of secondary cold-rolling unit rolling lubrication and strip surface quality.
Summary of the invention
Under the premise of not interfered the purpose of the present invention is to provide a kind of each nozzle emulsion injection of guarantee flow field, most Big degree improves the secondary cold-rolling unit emulsion spray of the uniformity of secondary cold-rolling unit belt steel surface emulsion flow distribution Frame top nozzle angle of heel optimization method.Injection of the present invention mainly in conjunction with secondary cold-rolling unit direct-injection system spraying rack and nozzle Feature, influence of the analysis spraying rack top nozzle angle of heel to flux density uniformity after the injection emulsion superposition of each nozzle, is being protected It demonstrate,proves in the inclination angular region that each nozzle emulsion injection flow field does not interfere, with each nozzle injection emulsion in strip width model Flux density is uniformly most objective optimization emulsion spray frame top nozzle angle of heel after enclosing interior superposition, realizes secondary cold-rolling unit cream Change the optimal setting of liquid spraying rack top nozzle angle of heel.
The present invention includes following step performed by computer:
(A) technical parameter needed for collecting the optimization of secondary cold-rolling unit emulsion spray frame top nozzle angle of heel, packet It includes: nozzle quantity N, injector spacing L, nozzle jetting height H, nozzle spray direction angle α, nozzle spray angle θ, nozzle injection stream Measure Q, nozzle angle of heel minimum valueNozzle angle of heel maximum valueStrip width maximum value Bmax
(B) mouth inclinationization spray angle optimization object function optimal value F is initializedy, and given nozzle angle of heel optimizes step-length
(C) nozzle angle of heel optimization process parameter i is defined, and initializes i=0.
(D) the corresponding nozzle angle of heel of calculation optimization procedure parameter i
(E) emulsion of single-nozzle injection is calculated in strip width directional flow Density Distribution q1i(xj):
In formula, j is emulsification flow quantity in strip width direction item member Position Number;ψ is emulsification flow quantity in strip width Directional spreding influences coefficient,BLFor jet width on the left of single-nozzle emulsion spray centerline,BRFor jet width on the right side of single-nozzle emulsion spray centerline,nLFor the item member number of jet width on the left of single-nozzle emulsion spray centerline,nRFor the item member number of jet width on the right side of single-nozzle emulsion spray centerline,xj It is emulsification flow quantity in the corresponding position strip width direction item member Position Number j, xj=(j-nL-1)△x;△ x is emulsion Interval width of the flow in the strip width direction position Tiao Yuan.
(F) emulsion of N number of nozzle injection is calculated in the superimposed flow distribution q in strip width directionNi(xj):
In formula, k is emulsification flow quantity in strip width direction additive process parameter;nMFor the corresponding item member of injector spacing Number,nNFor the corresponding item member of jet width after the emulsion flow summation of N number of nozzle in belt steel surface Number, nN=nL+(N-1)nM+nR+1;M is emulsification flow quantity in the strip width direction position Tiao Yuan xjCorresponding emulsification flow quantity is folded Add coefficient,
(G) secondary cold-rolling unit strip width range internal emulsification flow quantity cross direction profiles q is calculatedi(xj):
In formula, nSFor strip width maximum value BmaxCorresponding Cross slat member number,
(H) nozzle angle of heel optimization object function is calculated
In formula, λ is weight coefficient, 0 < λ < 1.
(I) judgeIt is whether true? if so, then enable the optimal value of nozzle angle of heel optimization object functionThe optimal value of nozzle angle of heelIt is transferred to step (J);If not, directly it is transferred to step (J).
(J) judgeIt is whether true? if so, i=i+1 is then enabled, step (D) is transferred to;If not, then it is transferred to Step (K).
(K) optimal value of secondary cold-rolling unit emulsion spray frame top nozzle angle of heel is exportedComplete secondary cold rolling The optimization of group emulsion spray frame top nozzle angle of heel.
The invention has the following advantages over the prior art:
By optimizing and revising emulsion spray frame top nozzle angle of heel, do not occur in each nozzle emulsion injection of guarantee flow field Under the premise of interference, the uniformity of secondary cold-rolling unit belt steel surface emulsion flow distribution is utmostly improved.
Detailed description of the invention
Fig. 1 is total calculation flow chart of the invention;
Fig. 2 is emulsification flow quantity cross direction profiles figure before the optimization of the corresponding nozzle angle of heel of embodiment 1;
Fig. 3 is emulsification flow quantity cross direction profiles figure after the optimization of the corresponding nozzle angle of heel of embodiment 1;
Fig. 4 is emulsification flow quantity cross direction profiles figure before the optimization of the corresponding nozzle angle of heel of embodiment 2;
Fig. 5 is emulsification flow quantity cross direction profiles figure after the optimization of the corresponding nozzle angle of heel of embodiment 2.
Specific embodiment
Embodiment 1:
By taking certain secondary cold-rolling unit as an example, rolled according to secondary cold-rolling unit emulsion spray frame top nozzle shown in FIG. 1 The total calculation flow chart of angle and optimizing method:
Firstly, collecting and being set needed for the optimization of secondary cold-rolling unit emulsion spray frame top nozzle angle of heel in step (A) Standby technological parameter, comprising: nozzle quantity N=10, injector spacing L=120mm, nozzle jetting height H=225mm, nozzle injection Direction angle alpha=57 °, nozzle spray angle θ=71 °, nozzle injection flow Q=1.03L/min, nozzle angle of heel minimum valueNozzle angle of heel maximum valueStrip width maximum value Bmax=1000mm.
Then, in step (B), nozzle angle of heel optimization object function optimal value F is initializedy=1000, and given spray Mouth rolls angle and optimizing step-length
Then, in step (C), nozzle angle of heel optimization process parameter i is defined, and initialize i=0.
Then, in step (D), the corresponding nozzle angle of heel of calculation optimization procedure parameter i
Then, in step (E), emulsification flow quantity is chosen in the interval width △ x=of the strip width direction position Tiao Yuan 1.0mm calculates the emulsion of single-nozzle injection in strip width directional flow Density Distribution q1i(xj):
In formula, j is emulsification flow quantity in strip width direction item member Position Number;ψ is emulsification flow quantity in strip width Directional spreding influences coefficient,BLIt is wide for injection on the left of single-nozzle emulsion spray centerline Degree,BRFor jet width on the right side of single-nozzle emulsion spray centerline,nLFor the item member of jet width on the left of single-nozzle emulsion spray centerline Number,nRFor the item member number of jet width on the right side of single-nozzle emulsion spray centerline,xj It is emulsification flow quantity in the corresponding position strip width direction item member Position Number j, xj=(j-nL-1)△x。
Then, in step (F), the emulsion of N number of nozzle injection is calculated in the superimposed flow in strip width direction point Cloth qNi(xj):
In formula, k is emulsification flow quantity in strip width direction additive process parameter;nMFor the corresponding item member of injector spacing Number,nNFor the corresponding item of jet width after the emulsion flow summation of N number of nozzle in belt steel surface First number, nN=nL+(N-1)nM+nR+1;M is emulsification flow quantity transverse injection width item member position xjCorresponding emulsification flow quantity Coefficient is superimposed,
Then, in step (G), strip width maximum value BmaxCorresponding Cross slat member number Calculate secondary cold-rolling process strip width range internal emulsification flow quantity cross direction profiles qi(xj):
Then, in step (H), weight selection coefficient lambda=0.6 calculates nozzle angle of heel optimization object function
Then, in step (I), judgementIt sets up, then enables the optimal value of nozzle angle of heel optimization object functionThe optimal value of nozzle angle of heelIt is transferred to step (J).
Then, in step (J), judgementIt sets up, then enables i=i+1, be transferred to step (D);Calculating is circuited sequentially, UntilIt is invalid, then it is transferred to step (K).
Finally, exporting the optimal value of secondary cold-rolling unit emulsion spray frame top nozzle angle of heel in step (K)Complete the optimization of secondary cold-rolling unit emulsion spray frame top nozzle angle of heel.
As shown in table 1, it can be seen that optimization rear nozzle angle of heel optimization object function under 0.1596 in conjunction with Fig. 2, Fig. 3 It is reduced to 0.1342, emulsion flux density undulate quantity drops to 2.23L/min/m from 2.40L/min/m, improves secondary cold-rolling The uniformity of unit belt steel surface emulsion flow distribution.
1 embodiment of table, 1 corresponding nozzle angle of heel optimization front and back emulsification flow quantity cross direction profiles comparison
Before optimization After optimization
Nozzle angle of heel (°) 25.0 6.8
Nozzle angle of heel optimization object function 0.1596 0.1342
Emulsion flux density maximum value (L/min/m) 9.22 8.80
Emulsion flux density minimum value (L/min/m) 6.82 6.57
Emulsion flux density average value (L/min/m) 8.52 8.50
Emulsion flux density undulate quantity (L/min/m) 2.40 2.23
Embodiment 2:
By taking certain secondary cold-rolling unit as an example:
Firstly, collecting and being set needed for the optimization of secondary cold-rolling unit emulsion spray frame top nozzle angle of heel in step (A) Standby technological parameter, comprising: nozzle quantity N=10, injector spacing L=120mm, nozzle jetting height H=280mm, nozzle injection Direction angle alpha=45 °, nozzle spray angle θ=65 °, nozzle injection flow Q=0.80L/min, nozzle angle of heel minimum valueNozzle angle of heel maximum valueStrip width maximum value Bmax=1000mm.
Then, in step (B), nozzle angle of heel optimization object function optimal value F is initializedy=1000, and given spray Mouth rolls angle and optimizing step-length
Then, in step (C), nozzle angle of heel optimization process parameter i is defined, and initialize i=0.
Then, in step (D), the corresponding nozzle angle of heel of calculation optimization procedure parameter i
Then, in step (E), emulsification flow quantity is chosen in the interval width △ x=of the strip width direction position Tiao Yuan 1.0mm calculates the emulsion of single-nozzle injection in strip width directional flow Density Distribution q1i(xj):
In formula, j is emulsification flow quantity in strip width direction item member Position Number;ψ is emulsification flow quantity in strip width Directional spreding influences coefficient,BLIt is wide for injection on the left of single-nozzle emulsion spray centerline Degree,BRFor jet width on the right side of single-nozzle emulsion spray centerline,nLFor the item member of jet width on the left of single-nozzle emulsion spray centerline Number,nRFor the item member number of jet width on the right side of single-nozzle emulsion spray centerline, xjIt is emulsification flow quantity in the corresponding position strip width direction item member Position Number j, xj=(j-nL-1)△x。
Then, in step (F), the emulsion of N number of nozzle injection is calculated in the superimposed flow in strip width direction point Cloth qNi(xj):
In formula, k is emulsification flow quantity in strip width direction additive process parameter;nMFor the corresponding item member of injector spacing Number,nNFor the corresponding item of jet width after the emulsion flow summation of N number of nozzle in belt steel surface First number, nN=nL+(N-1)nM+nR+1;M is emulsification flow quantity transverse injection width item member position xjCorresponding emulsification flow quantity Coefficient is superimposed,
Then, in step (G), strip width maximum value BmaxCorresponding Cross slat member number Calculate secondary cold-rolling process strip width range internal emulsification flow quantity cross direction profiles qi(xj):
Then, in step (H), weight selection coefficient lambda=0.6 calculates nozzle angle of heel optimization object function
Then, in step (I), judgementIt sets up, then enables the optimal value of nozzle angle of heel optimization object functionThe optimal value of nozzle angle of heelIt is transferred to step (J).
Then, in step (J), judgementIt sets up, then enables i=i+1, be transferred to step (D);Calculating is circuited sequentially, UntilIt is invalid, then it is transferred to step (K).
Finally, exporting the optimal value of secondary cold-rolling unit emulsion spray frame top nozzle angle of heel in step (K)Complete the optimization of secondary cold-rolling unit emulsion spray frame top nozzle angle of heel.
As shown in table 2, it can be seen that optimization rear nozzle angle of heel optimization object function under 0.1919 in conjunction with Fig. 4, Fig. 5 It is reduced to 0.1448, emulsion flux density undulate quantity drops to 1.71L/min/m from 2.41L/min/m, improves secondary cold-rolling The uniformity of unit belt steel surface emulsion flow distribution.
2 embodiment of table, 2 corresponding nozzle angle of heel optimization front and back emulsification flow quantity cross direction profiles comparison
Before optimization After optimization
Nozzle angle of heel (°) 25.0 13.3
Nozzle angle of heel optimization object function 0.1919 0.1448
Emulsion flux density maximum value (L/min/m) 7.02 6.84
Emulsion flux density minimum value (L/min/m) 4.61 5.13
Emulsion flux density average value (L/min/m) 6.52 6.49
Emulsion flux density undulate quantity (L/min/m) 2.41 1.71

Claims (1)

1. a kind of secondary cold-rolling unit emulsion spray frame top nozzle angle of heel optimization method, it is characterised in that: it includes following Step performed by computer:
(A) technical parameter needed for collecting the optimization of secondary cold-rolling unit emulsion spray frame top nozzle angle of heel, comprising: spray Unrounded number N, injector spacing L, nozzle jetting height H, nozzle spray direction angle α, nozzle spray angle θ, nozzle injection flow Q, Nozzle angle of heel minimum valueNozzle angle of heel maximum valueStrip width maximum value Bmax
(B) nozzle angle of heel optimization object function optimal value F is initializedy, and given nozzle angle of heel optimizes step-length
(C) nozzle angle of heel optimization process parameter i is defined, and initializes i=0;
(D) the corresponding nozzle angle of heel of calculation optimization procedure parameter i
(E) emulsion of single-nozzle injection is calculated in strip width directional flow Density Distribution q1i(xj):
In formula, j is emulsification flow quantity in strip width direction item member Position Number;ψ is emulsification flow quantity in strip width direction Distribution influences coefficient,BLFor jet width on the left of single-nozzle emulsion spray centerline,BRFor jet width on the right side of single-nozzle emulsion spray centerline,nLFor the item member number of jet width on the left of single-nozzle emulsion spray centerline,nRFor the item member number of jet width on the right side of single-nozzle emulsion spray centerline,xj It is emulsification flow quantity in the corresponding position strip width direction item member Position Number j, xj=(j-nL-1)△x;△ x is emulsion Interval width of the flow in the strip width direction position Tiao Yuan;
(F) emulsion of N number of nozzle injection is calculated in the superimposed flow distribution q in strip width directionNi(xj):
In formula, k is emulsification flow quantity in strip width direction additive process parameter;nMFor the corresponding item member number of injector spacing,nNFor the corresponding item member number of jet width after the emulsion flow summation of N number of nozzle in belt steel surface, nN=nL+(N-1)nM+nR+1;M is emulsification flow quantity in the strip width direction position Tiao Yuan xjCorresponding emulsion flow summation system Number,
(G) secondary cold-rolling unit strip width range internal emulsification flow quantity cross direction profiles q is calculatedi(xj):
In formula, nSFor strip width maximum value BmaxCorresponding Cross slat member number,
(H) nozzle angle of heel optimization object function is calculated
In formula, λ is weight coefficient, 0 < λ < 1;
(I) judgeIt is whether true? if so, then enable the optimal value of nozzle angle of heel optimization object function The optimal value of nozzle angle of heelIt is transferred to step (J);If not, directly it is transferred to step (J);
(J) judgeIt is whether true? if so, i=i+1 is then enabled, step (D) is transferred to;If not, then it is transferred to step (K);
(K) optimal value of secondary cold-rolling unit emulsion spray frame top nozzle angle of heel is exportedComplete secondary cold-rolling unit cream Change the optimization of liquid spraying rack top nozzle angle of heel.
CN201711282257.0A 2017-12-07 2017-12-07 A kind of secondary cold-rolling unit emulsion spray frame top nozzle angle of heel optimization method Expired - Fee Related CN108160724B (en)

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Publication number Priority date Publication date Assignee Title
JP2009248170A (en) * 2008-04-09 2009-10-29 Sumitomo Metal Ind Ltd Method and system for cooling t-shape steel
CN102189126A (en) * 2010-03-12 2011-09-21 宝山钢铁股份有限公司 Injection device and method for uniformly lubricating roll gap of rolling mill
CN104289530A (en) * 2013-07-18 2015-01-21 上海宝钢钢材贸易有限公司 Between-rack emulsified liquid flow distribution method of double-rack four-roller mill
CN106552828A (en) * 2015-09-30 2017-04-05 宝山钢铁股份有限公司 The manufacture method of the nozzle and the nozzle of secondary cold-rolling unit spray system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009248170A (en) * 2008-04-09 2009-10-29 Sumitomo Metal Ind Ltd Method and system for cooling t-shape steel
CN102189126A (en) * 2010-03-12 2011-09-21 宝山钢铁股份有限公司 Injection device and method for uniformly lubricating roll gap of rolling mill
CN104289530A (en) * 2013-07-18 2015-01-21 上海宝钢钢材贸易有限公司 Between-rack emulsified liquid flow distribution method of double-rack four-roller mill
CN106552828A (en) * 2015-09-30 2017-04-05 宝山钢铁股份有限公司 The manufacture method of the nozzle and the nozzle of secondary cold-rolling unit spray system

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