CN103544340A  Method for setting concentration of emulsion in rolling of fiverack cold continuous rolling unit extremely thin band  Google Patents
Method for setting concentration of emulsion in rolling of fiverack cold continuous rolling unit extremely thin band Download PDFInfo
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 CN103544340A CN103544340A CN201310446068.8A CN201310446068A CN103544340A CN 103544340 A CN103544340 A CN 103544340A CN 201310446068 A CN201310446068 A CN 201310446068A CN 103544340 A CN103544340 A CN 103544340A
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 238000005096 rolling process Methods 0.000 title claims abstract description 77
 239000000839 emulsion Substances 0.000 title claims abstract description 56
 238000000034 method Methods 0.000 claims abstract description 51
 238000005452 bending Methods 0.000 claims abstract description 41
 230000001050 lubricating Effects 0.000 claims abstract description 6
 206010022114 Injury Diseases 0.000 claims description 25
 238000005461 lubrication Methods 0.000 claims description 17
 229910000831 Steel Inorganic materials 0.000 claims description 12
 238000009826 distribution Methods 0.000 claims description 12
 239000010959 steel Substances 0.000 claims description 12
 239000010687 lubricating oil Substances 0.000 claims description 6
 238000004364 calculation method Methods 0.000 claims description 5
 238000004945 emulsification Methods 0.000 claims description 5
 239000007788 liquid Substances 0.000 claims description 5
 239000003921 oil Substances 0.000 claims description 5
 210000000481 Breast Anatomy 0.000 claims description 4
 230000035839 C max Effects 0.000 claims description 4
 230000037242 Cmax Effects 0.000 claims description 4
 230000037094 Cmin Effects 0.000 claims description 4
 230000005283 ground state Effects 0.000 claims description 4
 239000000463 material Substances 0.000 claims description 4
 238000005457 optimization Methods 0.000 claims description 4
 239000012530 fluid Substances 0.000 claims description 2
 230000001105 regulatory Effects 0.000 claims description 2
 230000005465 channeling Effects 0.000 abstract 1
 238000004519 manufacturing process Methods 0.000 description 6
 238000003801 milling Methods 0.000 description 4
 238000005097 cold rolling Methods 0.000 description 2
 206010017389 Frotteurism Diseases 0.000 description 1
 230000002411 adverse Effects 0.000 description 1
 230000000875 corresponding Effects 0.000 description 1
 238000005516 engineering process Methods 0.000 description 1
 238000005098 hot rolling Methods 0.000 description 1
Classifications

 B—PERFORMING OPERATIONS; TRANSPORTING
 B21—MECHANICAL METALWORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
 B21B—ROLLING OF METAL
 B21B37/00—Control devices or methods specially adapted for metalrolling mills or the work produced thereby
 B21B37/007—Control for preventing or reducing vibration, chatter or chatter marks

 B—PERFORMING OPERATIONS; TRANSPORTING
 B21—MECHANICAL METALWORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
 B21B—ROLLING OF METAL
 B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metalrolling mills
 B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metalrolling mills for lubricating, cooling, or cleaning
 B21B45/0239—Lubricating
 B21B45/0242—Lubricants

 B—PERFORMING OPERATIONS; TRANSPORTING
 B21—MECHANICAL METALWORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
 B21B—ROLLING OF METAL
 B21B1/00—Metalrolling methods or mills for making semifinished products of solid or profiled crosssection; Sequence of operations in milling trains; Layout of rollingmill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
 B21B1/22—Metalrolling methods or mills for making semifinished products of solid or profiled crosssection; Sequence of operations in milling trains; Layout of rollingmill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
 B21B1/24—Metalrolling methods or mills for making semifinished products of solid or profiled crosssection; Sequence of operations in milling trains; Layout of rollingmill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semicontinuous process
 B21B1/28—Metalrolling methods or mills for making semifinished products of solid or profiled crosssection; Sequence of operations in milling trains; Layout of rollingmill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semicontinuous process by coldrolling, e.g. Steckel cold mill

 B—PERFORMING OPERATIONS; TRANSPORTING
 B21—MECHANICAL METALWORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
 B21B—ROLLING OF METAL
 B21B1/00—Metalrolling methods or mills for making semifinished products of solid or profiled crosssection; Sequence of operations in milling trains; Layout of rollingmill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
 B21B1/22—Metalrolling methods or mills for making semifinished products of solid or profiled crosssection; Sequence of operations in milling trains; Layout of rollingmill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
 B21B2001/221—Metalrolling methods or mills for making semifinished products of solid or profiled crosssection; Sequence of operations in milling trains; Layout of rollingmill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by coldrolling

 B—PERFORMING OPERATIONS; TRANSPORTING
 B21—MECHANICAL METALWORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
 B21B—ROLLING OF METAL
 B21B2261/00—Product parameters
 B21B2261/20—Temperature

 B—PERFORMING OPERATIONS; TRANSPORTING
 B21—MECHANICAL METALWORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
 B21B—ROLLING OF METAL
 B21B2265/00—Forming parameters
 B21B2265/12—Rolling load or rolling pressure; roll force

 B—PERFORMING OPERATIONS; TRANSPORTING
 B21—MECHANICAL METALWORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
 B21B—ROLLING OF METAL
 B21B2265/00—Forming parameters
 B21B2265/20—Slip
Abstract
The invention discloses a method for setting concentration of emulsion in rolling of a fiverack cold continuous rolling unit extremely thin band. The method includes the following steps: (1) collecting characteristic parameters of main devices of a unit and toberolled bands, main rolling process parameters and process lubricating system parameters, (2) defining related process parameters, (3) computing roll bending force and the roll channeling amount, (4) assigning related search process parameters, (6) computing concentration process parameters, (6) computing the search process speed of the highest rolling speed, (7) computing friction coefficients of various racks under the current condition, (8) computing rolling force, rolling power, slip factors, heat slip damage indexes and vibration coefficients of the various racks under the current condition, (9) computing heat convexity degrees of working rollers of the various racks, (10) computing an exit plate shape and the pressing width, and (11) obtaining and outputting the optimum proportion concentration. The steps are executed by a computer. According to the method, the rolling speed can be quickened, the rolling efficiency can be guaranteed, slip, heat slip damage and vibration are avoided, and it is guaranteed that the exit plate shape of the final rack and the pressing width of the roller ends of the working rollers are the smallest.
Description
Technical field
The present invention relates to metallurgical cold rolling field, be particularly suitable for the establishing method of concentration of emulsion used in a kind of five Stands Cold Tandem Mill group strip in razorthin rollings.
Background technology
Along with market competition aggravation, user is constantly strong to the demand of belt steel thickness attenuate, requires producer that the even thinner product of 0.17mm is provided.But according to onthespot practical experience, along with reducing of belt steel thickness, very easily produce in process of production vibration, skid and the related defects such as hot sliding injury, especially particularly evident on the impact of rolling mill vibration, rolling mill vibration again can strip surface be formed with perpendicular to roll to the striped that replaces of light and shade or cause exit thickness deviation excessive, affect the quality of product.In the situation that other factors cannot change, scene can only alleviate the vibration of milling train by reduction of speed, make production restoration normal, so great production efficiency that affects unit.By research, find, rolling mill vibration except with mill speed mutually outside the Pass, also closely related with the Frotteurism of roll gap, on the one hand, the lubricating oil film in roll gap plays a kind of damping action for the Vertical Vibrating kinetic energy of rolling machine system, and the friction factor of oil film is lower, its damping action is poorer, the stability of system is also just poorer, and under kindred circumstances, the probability that vibration occurs milling train is also larger; On the other hand, in roll gap, friction factor is less, and friction is just less on the impact of draught pressure, relative tension force is just lower on the impact of draught pressure, cause the selfexcitation relation of entrance tension force and draught pressure to strengthen, system stability reduces, and milling train more easily vibrates.In addition,, if roll gap lubrication is too abundant, under labile factor is disturbed, the state fluctuation of roll gap can be larger, also the stability of system produced to adverse influence, increases the probability (document [1]) that rolling mill vibration occurs.And the concentration of friction factor in roll gap and lubricating status and emulsion is closely related, along with the increase of concentration, oil film thickness can increase, and friction factor can reduce, and is unfavorable for like this rolling mill vibration and the control of skidding, but is conducive to the control of hot sliding injury defect; When the concentration of emulsion surpasses certain value, it is more remarkable that the coefficient of heat transfer of emulsion declines, contact region temperaturerise ratio is very fast, thereby the kinetic viscosity that causes lubricating oil reduce also than comparatively fast, oil film thickness can reduce, friction factor can increase, and is conducive to like this rolling mill vibration and the control of skidding, but is unfavorable for the control of hot sliding injury.In addition, the concentration change of emulsion can also affect heat transfer coefficient, changes the hotrolling type of each frame working roll, and what cause milling train exit plate shape and working roll presses width change (document [2,3]).The variation of concentration of emulsion used can be skidded in influence of rolled process in other words, the probability of happening of the defect such as hot sliding injury, vibration and last frame exit plate shape and working roll press width, thus final influence of rolled speed.If it is unreasonable that the concentration of emulsion is set, will likely make unit mill speed not increase, influence of rolled efficiency.In the past, the onthespot setting for concentration of emulsion used relied on operative employee's experience to complete substantially, the band steel to all specifications, all adopt same concentration, cause in the paperthin strip operation of rolling, mill speed is on the low side or strip surface quality is not good, to unit, brings larger economic loss.
(list of references: [1] Zou Jiaxiang, Xu Lejiang. cold continuous rolling system vibration is controlled [M]. metallurgical industry publishing house, 2006.[2] Bai Zhenhua. cold continuous rolling highspeed production process core mathematics model [M]. China Machine Press, 2009.[3] Lian Jiachuan, Liu Hongmin. gauge and shape is controlled [M]. weapon industry publishing house, 1995.)
Summary of the invention
The object of the present invention is to provide a kind ofly can improve mill speed, guarantee rolling efficiency, avoid skidding, the establishing method of concentration of emulsion used in five Stands Cold Tandem Mill group paperthin strip rollings that the defect such as hot sliding injury and vibration occurs.
Technical scheme of the present invention is as follows:
An establishing method for concentration of emulsion used in five Stands Cold Tandem Mill group paperthin strip rollings, comprises the following step of being carried out by computing machine:
(a) collect major equipment and the technological parameter of five Stands Cold Tandem Mill groups, mainly comprise 15# machine frame rolling mill maximum draught pressure setting value P allowable
_{imax}i=1,2 ... 5,15# machine frame rolling mill maximum rolling power setting value F allowable
_{imax}, 15# frame intermediate calender rolls maximum shifting amount δ allowable
_{imax}, the maximum positive bending roller force of 15# frame working roll
the maximum negative bending roller force of 15# frame working roll
the maximum positive bending roller force of 15# frame intermediate calender rolls
the maximum negative bending roller force of 15# frame intermediate calender rolls
the maximum that end frame allows presses length
end frame outlet allows maximum plate shape value
15# working roll roller footpath D
_{iw}, 15# frame intermediate calender rolls diameter D
_{im}, 15# frame support roller diameter D
_{ib}, 15# frame working roller Distribution Value Δ D
_{wij}, 15# frame intermediate calender rolls roll shape Distribution Value Δ D
_{mij}, 15# frame support roller roll shape Distribution Value Δ D
_{bij}, 15# frame working roll barrel length L
_{wi}, 15# frame intermediate calender rolls barrel length L
_{mi}, 15# frame support roller barrel length L
_{bi}, 15# frame working roll bending cylinder centre distance l
_{wi}, 15# frame intermediate calender rolls rollbending cylinder centre distance l
_{mi}, 15# frame support roller housing screw centre distance l
_{bi};
(b) collect the characteristic parameter for the treatment of rolled strip, mainly comprise: the width B of band; The thickness h of band supplied materials
_{0}; The exit thickness h of 15 machine frame rolling mill band steel
_{i}; The elastic modulus E of band; The Poisson ratio v of band; The initial deformation drag σ of band
_{s0}; Resistance of deformation coefficient of intensification k
_{s};
(c) collect main rolling technological parameter, mainly comprise critical slip factor value ψ *; Critical slip injury index
threshold vibration coefficient φ
^{*}; Safety coefficient η; Uncoiler uncoiling tension T
_{0}, the outlet tension force T of 15# machine frame rolling mill band steel
_{i};
(d) collect main technique lubricating regime parameter, mainly comprise the flow W of 15# frame emulsion
_{i}; The temperature T of emulsion
_{c}; Emulsion system license Cmin C
_{min}, emulsion system license Cmax C
_{max};
(e) maximum mill speed search procedure parameter m in definition concentration of emulsion used Optimal Setting process; The search procedure speed V of maximum mill speed
_{max0}; Concentration of emulsion used search procedure parameter j; Concentration of emulsion used search procedure variable C
_{1}, C
_{2}; Best matched proportion density C
_{y}; Concentration stepsize in search Δ C; 15# frame coefficientoffrictionμ
_{i}, draught pressure F
_{i}, rolling power P
_{i}, slip factor ψ
_{i}, slip injury index
oscillating Coefficients φ
_{i}; Tandem mills i rolling mill work roll bending power S
_{iw}, intermediate calender rolls bending roller force S
_{im}; 15# frame intermediate calender rolls shifting amount δ
_{i}; Work roll thermal crown value Δ TD
_{iw}; End breast roll side pressure is by amount L
_{y}, last frame exit plate shape value σ
_{y};
(f) in order to improve to greatest extent the regulating power of unit to exit plate shape, make i machine frame rolling mill work roll bending power
15# frame intermediate calender rolls bending roller force
15 frame intermediate calender rolls shifting amount is set to ground state δ
_{i}=0;
(g) in definition paperthin strip coldrolled process, the initial value of maximum mill speed is V
_{0max}, and make V
_{0max}=100m/min, concentration search procedure parameter j=0, stepsize in search Δ C=0.001%;
(h) calculating concentration procedure parameter C
_{1}=C
_{min}+ j Δ C;
(i) make maximum mill speed search procedure parameter m=0;
(j) calculate the search procedure speed V of maximum mill speed
_{max0}=V
_{0max}+ 0.5m;
(k) calculate current technological lubrication system and mill speed V
_{max0}the coefficientoffrictionμ of lower each frame
_{i}, wherein the computation model of friction factor is:
in formula, μ is friction factor, and a is fluid friction influence coefficient, and b is dry friction influence coefficient, B
_{ξ}for friction factor damped expoential, ξ
_{0}for the oil film thickness under current working, a, b, B
_{ξ}value relevant with unit equipment;
(l) with the coefficientoffrictionμ under current working
_{i}, each interstand tension setting value T
_{i}, each frame exit thickness h
_{i}, band initial deformation drag σ
_{s0}, resistance of deformation coefficient of intensification k
_{s}for starting condition, calculate current technological lubrication system and mill speed V
_{max0}the draught pressure P of lower 15# frame
_{i}, rolling power F
_{i}, slip factor ψ
_{i}, slip injury index
oscillating Coefficients φ
_{i}; Wherein Rolling Pressure Calculation basic model is:
$P=({\mathrm{\σ}}_{s}{q}_{m})B\sqrt{{R}^{\text{'}}{H}_{0}\mathrm{\ϵ}}(1.08+1.79\mathrm{\μ\ϵ}\sqrt{\frac{{R}^{\text{'}}}{{H}_{0}(1\mathrm{\ϵ})}}1.02\mathrm{\ϵ}),$ Rolling power calculates basic model:
the basic model of slip factor is:
the basic model of slip injury index is:
oscillating Coefficients basic model is:
wherein P is rollforce, and R ' is for flattening radius, q
_{m}for equivalent tension force, σ
_{s}for average deformation drag, B is strip width, and μ is friction factor, and ε is reduction ratio, H
_{0}for inlet thickness; F
_{f}for rolling power, η is electric efficiency, v
_{r}for roll rotational speed (m/min), R is roller radius (m), and N is roll torque; ψ is slip factor, T
_{1}, T
_{0}for front and back tension force, Δ h is drafts;
for slip injury index, ξ is contact in rolling lubricating oil film equivalent depth, the lubricating oil film equivalent depth of ξ ' critical heat sliding injury state; φ is Oscillating Coefficients, and E is elastic modulus, and v is rolled piece velocity of discharge, T
_{c}for mean tension, L is adjacent frame spacing, and ω is system frequency;
(m) judgement inequality
whether set up simultaneously? if inequality is set up, proceed to step (n), otherwise proceed to step (r);
(n) calculate under current tension schedule, reduction system, technological lubrication system the hot convexity Δ TD of each frame working roll
_{iw};
(o) calculate under current tension schedule, reduction system, technological lubrication system the exit plate shape of last frame value σ
_{y}press segment length L with last frame
_{y};
(p) judgement inequality
set up? if inequality is set up, proceed to step (q); If inequality is false, proceed to step (r);
(q) make m=m+1, proceed to step (j);
(r) judgement inequality
set up? if inequality is set up, V
_{0max}=V
_{max0}0.5, C
_{2}=C
_{1}, proceed to step (s); If inequality is false, directly proceed to step (s);
(s) judgement inequality
set up? as inequality, set up, make j=j+1, proceed to step (h); If inequality is false, proceed to step (t);
(t) obtain optimum emulsification liquid matched proportion density C
_{y}=C
_{2}, and maximum mill speed V
_{max0}, complete the concentration of emulsion used integrated optimization and setting in five Stands Cold Tandem Mill group paperthin strip rollings.
The present invention compared with prior art tool has the following advantages:
(1) farthest improve mill speed, guarantee rolling efficiency;
(2) farthest avoid skidding, the generation of the defect such as hot sliding injury and vibration;
(3) guarantee that last frame exit plate shape minimum and working roll roller end press width minimum.
Adopt concentration of emulsion used optimized calculation method in the paperthin strip operation of rolling of the present invention, different size adopted to its corresponding optimum emulsification liquid concentration with steel, with domestic certain cold rolling mill cooperation, through onthespot, use, the present invention reduced rolling mill vibration in the onthespot strip in razorthin operation of rolling, skid and probability that hot sliding injury defect occurs, compare mill speed with classic method and improved 9.2314.39%, brought very large economic benefit, there is the value of further applying.
Accompanying drawing explanation
Fig. 1 is the total calculation flow chart of the present invention;
Fig. 2 is each machine frame rolling mill working roller curve figure in the embodiment of the present invention 1;
Fig. 3 is last frame exit plate shape correlation curve figure before and after optimizing in the embodiment of the present invention 1;
Each machine frame rolling mill working roller curve figure in Fig. 4 embodiment of the present invention 2;
Fig. 5 is last frame exit plate shape correlation curve figure before and after optimizing in the embodiment of the present invention 2.
Embodiment
Embodiment 1
In five Stands Cold Tandem Mill group paperthin strip rollings shown in Fig. 1 in total calculation flow chart of the establishing method of concentration of emulsion used, first, in step 1, collect major equipment and the technological parameter of five Stands Cold Tandem Mill groups, 15 machine frame rolling mill maximum draught pressure setting value P allowable
_{imax}=(1800t, 1800t, 1800t, 1800t, 1800t) i=1,2 ... 5,15 machine frame rolling mill maximum rolling power setting value F allowable
_{imax}=(2680kw, 4000kw, 4000kw, 4000kw, 4000kw), 15# frame intermediate calender rolls maximum shifting amount δ allowable
_{imax}=80mm, the maximum positive bending roller force of 15# frame working roll
the maximum negative bending roller force of 15# frame working roll
the maximum positive bending roller force of 15# frame intermediate calender rolls
the maximum negative bending roller force of 15# frame intermediate calender rolls
the maximum that end frame allows presses length
end frame outlet allows maximum plate shape value
15# working roll roller footpath D
_{iw}={ 482.89,486.32,459.24,386.21,394.5}mm, 15# frame intermediate calender rolls diameter D
_{im}={ 510.68,527.35,508.56,526.29,537.34}mm, 15# frame support roller diameter D
_{ib}={ 1231.99,1179.48,1176.12,1241.3,1241.3}mm, 15# frame working roller Distribution Value Δ D
_{wij}=0,15# frame support roller roll shape Distribution Value Δ D
_{bij}=0,15# frame intermediate calender rolls roll shape Distribution Value Δ D
_{mij}={ 78.181 ,23.081,18.626,48.241,67.067,76.403,77.552,71.815,60.494,44.889,26.302,6.035,14.612 ,34.336 ,51.837 ,65.813,74.963 ,77.985 ,73.578 ,60.441,37.272 ,2.769, the μ m of 44.367}(unit), 15# frame working roll barrel length L
_{wi}=1350mm, 15# frame intermediate calender rolls barrel length L
_{mi}=1510mm, 15# frame support roller barrel length L
_{bi}=1350mm, 15# frame working roll bending cylinder centre distance l
_{wi}=2500mm, 15# frame intermediate calender rolls rollbending cylinder centre distance l
_{mi}=2500mm, 15# frame support roller housing screw centre distance l
_{bi}=2500mm;
Subsequently, in step 2, collect the characteristic parameter for the treatment of rolled strip, mainly comprise: the width B=812mm of band; The thickness h of band supplied materials
_{0}=2.01mm; The exit thickness h of 15 machine frame rolling mill band steel
_{i}={ 1.186,0.68,0.472,0.271,0.182}mm; Elastic modulus E=2.1 * the 105MPa of band; The Poisson ratio v=0.3 of band; The initial deformation drag σ of band
_{s0}=350MPa; Resistance of deformation coefficient of intensification k
_{s}=1.3;
Subsequently, in step 3, collect main rolling technological parameter, mainly comprise critical slip factor ψ
^{*}=0.4, critical heat slip injury index
threshold vibration coefficient φ
^{*}=0.9, safety coefficient η=0.9; Uncoiler uncoiling tension T
_{0}=65MPa, the outlet tension force T of 15 machine frame rolling mill band steel
_{i}={ 110,125,132,125,68}MPa;
Subsequently, in step 4, collect main technique lubricating regime parameter, mainly comprise the flow W of 15 frame emulsion
_{i}={ 1010,1250,1100,950,1200}L/min; The temperature T of emulsion
_{c}=58 ℃; Emulsion system license Cmin C
_{min}=1%, emulsion system license Cmax C
_{max}=6%;
Subsequently, in step 5, maximum mill speed search procedure parameter m in definition concentration of emulsion used Optimal Setting process; The search procedure speed V of maximum mill speed
_{max0}; Concentration of emulsion used search procedure parameter j; Concentration of emulsion used search procedure variable C
_{1}, C
_{2}; Best matched proportion density C
_{y}; Concentration stepsize in search Δ C; 15 frame coefficientoffrictionμ
_{i}, draught pressure F
_{i}, rolling power P
_{i}, slip factor ψ
_{i}, slip injury index
oscillating Coefficients φ
_{i}; Tandem mills i rolling mill work roll bending power S
_{iw}, intermediate calender rolls bending roller force S
_{im}; 15 frame intermediate calender rolls shifting amount δ
_{i}; Work roll thermal crown value Δ TD
_{iw}; End breast roll side pressure is by amount L
_{y}, last frame exit plate shape value σ
_{y};
Subsequently, in step 6, make i machine frame rolling mill work roll bending power
i frame intermediate calender rolls bending roller force
15 frame intermediate calender rolls shifting amount is set to ground state δ
_{i}=0;
Subsequently, in step 7, in definition paperthin strip coldrolled process, the initial value of maximum mill speed is V
_{0max}, and make V
_{0max}=100m/min, concentration search procedure parameter i=0, stepsize in search Δ C=0.01%;
Subsequently, in step 8, calculate concentration of emulsion used procedure parameter C
_{1}=C
_{min}+ j Δ C=1%;
Subsequently, in step 9, make maximum mill speed search procedure parameter m=0;
Subsequently, in step 10, calculate the search procedure speed V of maximum mill speed
_{max0}=V
_{0max}+ 0.5m=100m/min;
Subsequently, in step 11, calculate current technological lubrication system and mill speed V
_{max0}the coefficientoffrictionμ of lower each frame
_{i}={ 0.0870,0.0635,0.0470,0.0413,0.0329};
Subsequently, in step 12, with the coefficientoffrictionμ under current working
_{i}, each interstand tension setting value T
_{i}, each frame exit thickness h
_{i}, band initial deformation drag σ
_{s0}, resistance of deformation coefficient of intensification k
_{s}for starting condition, calculate current technological lubrication system and mill speed V
_{max0}the draught pressure P of lower 15# frame
_{i}={ 681.64,713.21,533.82,586.14,633.78}t, rolling power F
_{i}={ 94.58,142.81,123.99,186.98,163.18}Kw, slip factor ψ
_{i}={ 0.153,0.152,0.123,0.145,0.093}, slip injury index
, Oscillating Coefficients φ
_{i}={ 0.033,0.105,0.176,0.215,0.308};
Subsequently, in step 13, judgement inequality
whether set up simultaneously? obviously inequality is set up, and proceeds to step 14;
Subsequently, in step 14, calculate under current tension schedule, reduction system, technological lubrication system the hot convexity Δ TD of each frame working roll
_{iw}, the work roll thermal crown of each frame as shown in Figure 2;
Subsequently, in step 15, calculate under current tension schedule, reduction system, technological lubrication system the exit plate shape of last frame value σ
_{y}=16I and last frame press segment length L
_{y}=48.6mm, plate shape curve is as shown in Figure 3;
Subsequently, in step 16, judgement inequality
set up? obviously inequality is set up, and proceeds to step 17;
Subsequently, in step 17, make m=m+1=1, proceed to step 10;
Subsequently, in step 18, judgement inequality
set up? if inequality is set up, V
_{0max}=V
_{max0}0.5, C
_{2}=C
_{1}, proceed to step 19; If inequality is false, directly proceed to step 19;
Subsequently, in step 19, judgement inequality
set up? as inequality, set up, make j=j+1, proceed to step 8; If inequality is false, proceed to step 20;
Finally, in step 20, obtain optimum emulsification liquid matched proportion density C
_{y}=C
_{2}=4.65%, maximum mill speed V
_{max0}=1420m/min, completes the concentration of emulsion used integrated optimization and setting in five Stands Cold Tandem Mill group paperthin strip rollings.
Finally, for convenient relatively, as shown in table 1, provide respectively the concentration of emulsion used and the maximum mill speed that adopt in the paperthin strip operation of rolling that the method for the invention and classic method draw.As can be seen from Table 1, after concentration of emulsion used improves, unit has been brought up to 1420m/min to the maximum mill speed of this thin specification band from 1300m/min, has improved 9.23%, has improved well the production efficiency of unit.
In table 1: embodiment 1, adopt the present invention and classic method parameter comparison
?  Concentration of emulsion used  Maximum mill speed 
The present invention  4.65%  1420m/min 
Classic method  4.2%  1300m/min 
Embodiment 2
First, in step 1, collect major equipment and the technological parameter of five Stands Cold Tandem Mill groups, 15 machine frame rolling mill maximum draught pressure setting value P allowable
_{imax}=(1800t, 1800t, 1800t, 1800t, 1800t) i=1,2 ... 5,15 machine frame rolling mill maximum rolling power setting value F allowable
_{imax}=(2680kw, 4000kw, 4000kw, 4000kw, 4000kw), 15# frame intermediate calender rolls maximum shifting amount δ allowable
_{imax}=80mm, the maximum positive bending roller force of 15# frame working roll
the maximum negative bending roller force of 15# frame working roll
the maximum positive bending roller force of 15# frame intermediate calender rolls
the maximum negative bending roller force of 15# frame intermediate calender rolls
the maximum that end frame allows presses length
end frame outlet allows maximum plate shape value
15# working roll roller footpath D
_{iw}={ 476.84,480.86,463.06,399.33,406.86}mm, 45# frame intermediate calender rolls diameter D
_{im}={ 533.26,529.82,513.45,510.46,508.92}mm, 15# frame support roller diameter D
_{ib}={ 1241.43,1179.48,1176.12,1241.3,1241.3}mm, 15# frame working roller Distribution Value Δ D
_{wij}=0,15# frame support roller roll shape Distribution Value Δ D
_{bij}=0,45# frame intermediate calender rolls roll shape Distribution Value Δ D
_{mij}={ 78.181 ,23.081,18.626,48.241,67.067,76.403,77.552,71.815,60.494,44.889,26.302,6.035,14.612 ,34.336 ,51.837 ,65.813,74.963 ,77.985 ,73.578 ,60.441,37.272 ,2.769, the μ m of 44.367}(unit), 15# frame working roll barrel length L
_{wi}=1350mm, 15# frame intermediate calender rolls barrel length L
_{mi}=1510mm, 15# frame support roller barrel length L
_{bi}=1350mm, 15# frame working roll bending cylinder centre distance l
_{wi}=2500mm, 15# frame intermediate calender rolls rollbending cylinder centre distance l
_{mi}=2500mm, 15# frame support roller housing screw centre distance l
_{bi}=2500mm;
Subsequently, in step 2, collect the characteristic parameter for the treatment of rolled strip, mainly comprise: the width B=966mm of band; The thickness h of band supplied materials
_{0}=2.02mm; The exit thickness h of 15 machine frame rolling mill band steel
_{i}={ 1.15515,0.642261,0.396439,0.259047,0.181}mm; Elastic modulus E=2.1 * 10 of band
^{5}mPa; The Poisson ratio v=0.3 of band; The initial deformation drag σ of band
_{s0}=400MPa; Resistance of deformation coefficient of intensification k
_{s}=1.3;
Subsequently, in step 3, collect main rolling technological parameter, mainly comprise critical slip factor ψ
^{*}=0.36, critical heat slip injury index
threshold vibration coefficient φ
^{*}=0.85, safety coefficient η=0.9; Uncoiler uncoiling tension T
_{0}=70MPa, the outlet tension force T of 15 machine frame rolling mill band steel
_{i}={ 130,145,145,150,65}MPa;
Subsequently, in step 4, collect main technique lubricating regime parameter, mainly comprise the flow W of 15 frame emulsion
_{i}={ 1010,1250,1100,950,1200}L/min; The temperature T of emulsion
_{c}=58 ℃; Emulsion system license Cmin C
_{min}=1%, emulsion system license Cmax C
_{max}=6%;
Subsequently, in step 5, maximum mill speed search procedure parameter m in definition concentration of emulsion used Optimal Setting process; The search procedure speed V of maximum mill speed
_{max0}; Concentration of emulsion used search procedure parameter j; Concentration of emulsion used search procedure variable C
_{1}, C
_{2}; Best matched proportion density C
_{y}; Concentration stepsize in search Δ C; 15 frame coefficientoffrictionμ
_{i}, draught pressure F
_{i}, rolling power P
_{i}, slip factor ψ
_{i}, slip injury index
oscillating Coefficients φ
_{i}; Tandem mills i rolling mill work roll bending power S
_{iw}, intermediate calender rolls bending roller force S
_{im}; 15 frame intermediate calender rolls shifting amount δ
_{i}; Work roll thermal crown value Δ TD
_{iw}; End breast roll side pressure is by amount L
_{y}, last frame exit plate shape value σ
_{y};
Subsequently, in step 6, make i machine frame rolling mill work roll bending power
i frame intermediate calender rolls bending roller force
15 frame intermediate calender rolls shifting amount is set to ground state δ
_{i}=0;
Subsequently, in step 7, in definition paperthin strip coldrolled process, the initial value of maximum mill speed is V
_{0max}, and make V
_{0max}=100m/min, concentration search procedure parameter i=0, stepsize in search Δ C=0.01%;
Subsequently, in step 8, calculate concentration of emulsion used procedure parameter C
_{1}=C
_{min}+ j Δ C=1%;
Subsequently, in step 9, make maximum mill speed search procedure parameter m=0;
Subsequently, in step 10, calculate the search procedure speed V of maximum mill speed
_{max0}=V
_{0max}+ 0.5m=100m/min;
Subsequently, in step 11, calculate current technological lubrication system and mill speed V
_{max0}the coefficientoffrictionμ of lower each frame
_{i}={ 0.0789,0.0585,0.0602,0.0428,0.0317};
Subsequently, in step 12, with the coefficientoffrictionμ under current working
_{i}, each interstand tension setting value T
_{i}, each frame exit thickness h
_{i}, band initial deformation drag σ
_{s0}, resistance of deformation coefficient of intensification k
_{s}for starting condition, calculate current technological lubrication system and mill speed V
_{max0}the draught pressure P of lower 15# frame
_{i}={ 893.56,909.49,1010.58,721.57,813.37}t, rolling power F
_{i}={ 127.06,196.83,209.62,175.98,197.59}Kw, slip factor ψ
_{i}={ 0.172,0.165,0.097,0.105,0.085}, slip injury index
, Oscillating Coefficients φ
_{i}={ 0.028,0.092,0.156,0.227,0.290};
Subsequently, in step 13, judgement inequality
whether set up simultaneously? obviously inequality is set up, and proceeds to step 14;
Subsequently, in step 14, calculate under current tension schedule, reduction system, technological lubrication system the hot convexity Δ TD of each frame working roll
_{iw}, the work roll thermal crown of each frame as shown in Figure 4;
Subsequently, in step 15, calculate under current tension schedule, reduction system, technological lubrication system the exit plate shape of last frame value σ
_{y}=16I and last frame press segment length L
_{y}=48.6mm, plate shape curve is as shown in Figure 5;
Subsequently, in step 16, judgement inequality
set up? obviously inequality is set up, and proceeds to step 17;
Subsequently, in step 17, make m=m+1=1, proceed to step 10;
Subsequently, in step 18, judgement inequality
set up? if inequality is set up, V
_{0max}=V
_{max0}0.5, C
_{2}=C
_{1}, proceed to step 19; If inequality is false, directly proceed to step 19;
Subsequently, in step 19, judgement inequality
set up? as inequality, set up, make j=j+1, proceed to step 8; If inequality is false, proceed to step 20;
Finally, in step 20, obtain optimum emulsification liquid matched proportion density C
_{y}=C
_{2}=4.78%, maximum mill speed V
_{max0}=1510m/min, completes the concentration of emulsion used integrated optimization and setting in five Stands Cold Tandem Mill group paperthin strip rollings.
Finally, for convenient relatively, as shown in table 2, provide respectively the concentration of emulsion used and the maximum mill speed that adopt in the paperthin strip operation of rolling that the method for the invention and classic method draw.As can be seen from Table 2, after concentration of emulsion used improves, unit has been brought up to 1510m/min to the maximum mill speed of this thin specification band from 1320m/min, has improved 14.39%, has well improved the production efficiency of unit.
In table 2: embodiment 2, adopt the present invention and classic method parameter comparison
?  Concentration of emulsion used  Maximum mill speed 
The present invention  4.78%  1510m/min 
Classic method  4.2%  1320m/min 
Claims (1)
1. an establishing method for concentration of emulsion used in five Stands Cold Tandem Mill group paperthin strip rollings, it comprises the following step of being carried out by computing machine:
(a) collect major equipment and the technological parameter of five Stands Cold Tandem Mill groups, mainly comprise 15# machine frame rolling mill maximum draught pressure setting value P allowable
_{imax}i=1,2 ... 5,15# machine frame rolling mill maximum rolling power setting value F allowable
_{imax}, 15# frame intermediate calender rolls maximum shifting amount δ allowable
_{imax}, the maximum positive bending roller force of 15# frame working roll
the maximum negative bending roller force of 15# frame working roll
the maximum positive bending roller force of 15# frame intermediate calender rolls
the maximum negative bending roller force of 15# frame intermediate calender rolls
the maximum that end frame allows presses length
end frame outlet allows maximum plate shape value
15# working roll roller footpath D
_{iw}, 15# frame intermediate calender rolls diameter D
_{im}, 15# frame support roller diameter D
_{ib}, 15# frame working roller Distribution Value Δ D
_{w}i
_{j}, 15# frame intermediate calender rolls roll shape Distribution Value Δ D
_{m}i
_{j}, 15# frame support roller roll shape Distribution Value Δ D
_{b}i
_{j}, 15# frame working roll barrel length L
_{wi}, 15# frame intermediate calender rolls barrel length L
_{mi}, 15# frame support roller barrel length L
_{bi}, 15# frame working roll bending cylinder centre distance l
_{wi}, 15# frame intermediate calender rolls rollbending cylinder centre distance l
_{mi}, 15# frame support roller housing screw centre distance l
_{bi};
(b) collect the characteristic parameter for the treatment of rolled strip, mainly comprise: the width B of band; The thickness h of band supplied materials
_{0}; The exit thickness h of 15# machine frame rolling mill band steel
_{i}; The elastic modulus E of band; The Poisson ratio v of band; The initial deformation drag σ of band
_{s0}; Resistance of deformation coefficient of intensification k
_{s};
(c) collect main rolling technological parameter, mainly comprise critical slip factor value ψ *; Critical slip injury index
threshold vibration coefficient φ
^{*}; Safety coefficient η; Uncoiler uncoiling tension T
_{0}, the outlet tension force T of 15# machine frame rolling mill band steel
_{i};
(d) collect main technique lubricating regime parameter, mainly comprise the flow W of 15# frame emulsion
_{i}; The temperature T of emulsion
_{c}; Emulsion system license Cmin C
_{min}, emulsion system license Cmax C
_{max};
(e) maximum mill speed search procedure parameter m in definition concentration of emulsion used Optimal Setting process; The search procedure speed V of maximum mill speed
_{max0}; Concentration of emulsion used search procedure parameter j; Concentration of emulsion used search procedure variable C
_{1}, C
_{2}; Best matched proportion density C
_{y}; Concentration stepsize in search Δ C; 15# frame coefficientoffrictionμ
_{i}, draught pressure F
_{i}, rolling power P
_{i}, slip factor ψ
_{i}, slip injury index
, Oscillating Coefficients φ
_{i}; Tandem mills i rolling mill work roll bending power S
_{iw}, intermediate calender rolls bending roller force S
_{im}; 15# frame intermediate calender rolls shifting amount δ
_{i}; Work roll thermal crown value Δ TD
_{iw}; End breast roll side pressure is by amount L
_{y}, last frame exit plate shape value σ
_{y};
(f) in order to improve to greatest extent the regulating power of unit to exit plate shape, make i machine frame rolling mill work roll bending power
15# frame intermediate calender rolls bending roller force
15# frame intermediate calender rolls shifting amount is set to ground state δ
_{i}=0;
(g) in definition paperthin strip coldrolled process, the initial value of maximum mill speed is V
_{0max}, and make V
_{0max}=100m/min, concentration search procedure parameter j=0, stepsize in search Δ C=0.001%;
(h) calculating concentration procedure parameter C
_{1}=C
_{min}+ j Δ C;
(i) make maximum mill speed search procedure parameter m=0;
(j) calculate the search procedure speed V of maximum mill speed
_{max0}=V
_{0max}+ 0.5m;
(k) calculate current technological lubrication system and mill speed V
_{max0}the coefficientoffrictionμ of lower each frame
_{i}, wherein the computation model of friction factor is:
in formula, μ is friction factor, and a is fluid friction influence coefficient, and b is dry friction influence coefficient, B
_{ξ}for friction factor damped expoential, ξ
_{0}for the oil film thickness under current working, a, b, B
_{ξ}value relevant with unit equipment;
(l) with the coefficientoffrictionμ under current working
_{i}, each interstand tension setting value T
_{i}, each frame exit thickness h
_{i}, band initial deformation drag σ
_{s0}, resistance of deformation coefficient of intensification k
_{s}for starting condition, calculate current technological lubrication system and mill speed V
_{max0}the draught pressure P of lower 15# frame
_{i}, rolling power F
_{i}, slip factor ψ
_{i}, slip injury index
oscillating Coefficients φ
_{i}; Wherein Rolling Pressure Calculation basic model is:
$P=({\mathrm{\σ}}_{s}{q}_{m})B\sqrt{{R}^{\text{'}}{H}_{0}\mathrm{\ϵ}}(1.08+1.79\mathrm{\μ\ϵ}\sqrt{\frac{{R}^{\text{'}}}{{H}_{0}(1\mathrm{\ϵ})}}1.02\mathrm{\ϵ}),$ Rolling power calculates basic model:
the basic model of slip factor is:
the basic model of slip injury index is:
oscillating Coefficients basic model is:
wherein P is rollforce, and R ' is for flattening radius, q
_{m}for equivalent tension force, σ
_{s}for average deformation drag, B is strip width, and μ is friction factor, and ε is reduction ratio, H
_{0}for inlet thickness; F
_{f}for rolling power, η is electric efficiency, v
_{r}for roll rotational speed (m/min), R is roller radius (m), and N is roll torque, and ψ is slip factor, T
_{1}, T
_{0}for front and back tension force, Δ h is drafts;
for slip injury index, ξ is contact in rolling lubricating oil film equivalent depth, the lubricating oil film equivalent depth of ξ ' critical heat sliding injury state; φ is Oscillating Coefficients, and E is elastic modulus, and v is rolled piece velocity of discharge, T
_{c}for mean tension, L is adjacent frame spacing, and ω is system frequency;
(m) judgement inequality
whether set up simultaneously? if inequality is set up, proceed to step (n), otherwise proceed to step (r);
(n) calculate under current tension schedule, reduction system, technological lubrication system the hot convexity Δ TD of each frame working roll
_{iw};
(o) calculate under current tension schedule, reduction system, technological lubrication system the exit plate shape of last frame value σ
_{y}press segment length L with last frame
_{y};
(p) judgement inequality
set up? if inequality is set up, proceed to step (q); If inequality is false, proceed to step (r);
(q) make m=m+1, proceed to step (j);
(r) judgement inequality
set up? if inequality is set up, V
_{0max}=V
_{max0}0.5, C
_{2}=C
_{1}, proceed to step (s); If inequality is false, directly proceed to step (s);
(s) judgement inequality
set up? as inequality, set up, make j=j+1, proceed to step (h); If inequality is false, proceed to step (t);
(t) obtain optimum emulsification liquid matched proportion density C
_{y}=C
_{2}, and maximum mill speed V
_{max0}, complete the integrated optimization and setting of concentration of emulsion used in five Stands Cold Tandem Mill group paperthin strip rollings.
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