Summary of the invention
In order to solve the problems of the technologies described above; The present invention provides method for comprehensively optimizing process lubrication system under a kind of secondary cold-rolling unit rolling mode; This method can improve mill speed and surface quality of products and strip shape quality, reduces oil consumption, guarantees the production capacity and the lumber recovery of unit.To achieve these goals, the present invention has adopted following technical scheme: method for comprehensively optimizing process lubrication system under a kind of secondary cold-rolling unit rolling mode comprises the following step that can be carried out by computer:
(1) device parameter of collection secondary cold-rolling unit mainly comprises: 1
#With 2
#Frame work roll diameter D
W1, D
W2, 1
#With 2
#Frame intermediate calender rolls diameter D
M1, D
M2, 1
#With 2
#Frame support roller diameter D
B1, D
B2, 1
#Frame working roll and intermediate calender rolls and backing roll roll shape distribution Δ D
1wi, Δ D
1mi, Δ D
1bi, 2
#Frame working roll and intermediate calender rolls and backing roll roll shape distribution Δ D
2wi, Δ D
2mi, Δ D
2bi, 1
#With 2
#Frame working roll barrel length L
W1, L
W2, 1
#With 2
#Frame intermediate calender rolls barrel length L
M1, L
M2, 1
#With 2
#Frame support roller barrel length L
B1, L
B2, 1
#With 2
#Frame working roll housing screw centre-to-centre spacing l
W1, l
W2, 1
#With 2
#Frame intermediate calender rolls housing screw centre-to-centre spacing l
M1, l
M2, 1
#With 2
#Screw centre-to-centre spacing l under the frame support roll-in
B1, l
B2, 1
#With 2
#The critical slip factor value ψ of frame
1 *, ψ
2 *, 1
#With 2
#The critical slip injury index value of frame
(2) collect the technological lubrication characterisitic parameter of secondary cold-rolling unit, comprise the maximum stream flow w of emulsion
MaxCmax C
MaxMinimum temperature and maximum temperature T that emulsion allows
Min, T
Max
(3) collection treats that the crucial rolling technological parameter of strip mainly comprises: the cross direction profiles value L that comes flitch shape
i, the width B, supplied materials thickness H of band, total drafts ε
0, the drafts distribution coefficient ξ between 1# and the 2# frame
i, forward pull setting value T
1, middle tension force setting value T
2, backward pull setting value T
0, 1
#Frame intermediate calender rolls shifting amount δ
1, 2
#Frame intermediate calender rolls shifting amount δ
2, 1
#Frame work roll bending power S
1w, 1
#Frame intermediate calender rolls bending roller force S
1m, 2
#Frame work roll bending power S
2w, 2
#Frame intermediate calender rolls bending roller force S
2m
(4) the initial set value G of given emulsion complex optimum object function
0=1.0 * 10
20
(5) set emulsion temperature pilot process calculating parameter k
1=0, the temperature step-size in search is Δ T=1.5 ℃;
(6) given emulsion temperature is T
c=T
Min+ k
1Δ T;
(7) set concentration of emulsion used process calculating parameter k
2=1, the concentration step-size in search is Δ C=0.8%;
(8) given concentration of emulsion used is C=k
2Δ C;
(9) set emulsion discharge process calculating parameter k
3=1, the flow step-size in search is Δ w=0.05l/min;
(10) given emulsion flow is w=k
3Δ w;
(11) calculate thermal conductivity factor k, 1# frame coefficientoffriction under the current technological lubrication condition
1, 2# frame coefficient of friction μ
2
(12) calculate the 1# under current technological lubrication condition and the rolling technological parameter, the value ψ of 2# frame slip factor
1, ψ
2
(13) judge whether inequality
is set up simultaneously; If set up then change step (14) over to, otherwise change step (23) over to;
(14) calculate the 1# under the current technological lubrication condition, the value
of 2# frame slip injury index
(15) judge whether inequality
is set up simultaneously; If set up then change step (16) over to, otherwise change step (23) over to;
(16) calculate 1# frame and the draught pressure P of 2# frame under the current technological lubrication condition
1, P
2
(17) calculate 1# frame and 2# frame working roll Δ D under the current technological lubrication condition
W1i, Δ D
W2i
(18) calculate the band exit plate shape σ of 2# frame under the hot convexity of work at present roller, intermediate calender rolls and backing roll
2i
(19) calculate the oil consumption index k of unit
y=Cw;
(20) calculate unit resid amount index
(in the formula: α
C1, α
C2-Residual oil characteristic coefficient);
(21) calculate emulsion complex optimum object function G (X)=(k under the current technological lubrication condition
y)
α(k
c)
β((max (σ
2i)-min (σ
2i))/T
1) (in the formula: α, beta-oil consumption and Residual oil weight coefficient);
(22) compare G (X) and G
0Size, if inequality G (X) p G
0, G then
0=G (X), T
c *=T
c, C
*=C, w
*=w;
(23) judge inequality w≤w
MaxSet up? Set up like inequality, then make k
3=k
3+ 1 changes step (10) over to; Otherwise change step (24) over to;
(24) judge inequality C≤C
MaxSet up? Set up like inequality, then make k
2=k
2+ 1 changes step (8) over to; Otherwise change step (25) over to;
(25) judge inequality T
c≤T
MaxSet up? Set up like inequality, then make k
1=k
1+ 1 changes step (6) over to; Otherwise change step (26) over to;
(26) the optimum setting value T of output emulsion
c *, C
*, w
*
(27) finish to calculate.
The specific embodiment
First embodiment
Accompanying drawing 1 is the The general frame of comprehensively optimizing process lubrication system under the secondary cold-rolling unit rolling mode.Existing is that 0.155mm * 824mm, steel grade are that the band steel of MR DR-8CA is an example with the specification, describes the comprehensively optimizing process lubrication system implementation procedure under its rolling mode by specific secondary cold-rolling unit.
At first, in step 1, the device parameter of collecting the secondary cold-rolling unit mainly comprises: 1
#With 2
#Frame work roll diameter D
W1=560mm, D
W2=560mm, 1
#With 2
#Frame intermediate calender rolls diameter D
M1=560mm, D
M2=560mm, 1
#With 2
#Frame support roller diameter D
B1=1000mm, D
B2=1000mm, 1
#Frame working roll and intermediate calender rolls and backing roll roll shape distribution Δ D
1wi=0, Δ D
1mi=0, Δ D
1bi=0,2
#Frame working roll and intermediate calender rolls and backing roll roll shape distribution Δ D
2wi=0, Δ D
2mi=0, Δ D
2bi=0,1
#With 2
#Frame working roll barrel length L
W1=1220mm, L
W2=1220mm, 1
#With 2
#Frame intermediate calender rolls barrel length L
M1=1220mm, L
M2=1220mm, 1
#With 2
#Frame support roller barrel length L
B1=1220mm, L
B2=1220mm, 1
#With 2
#Frame working roll housing screw centre-to-centre spacing l
W1=2200mm, l
W2=2200mm, 1
#With 2
#Frame intermediate calender rolls housing screw centre-to-centre spacing l
M1=2210mm, l
M2=2210mm, 1
#With 2
#Screw centre-to-centre spacing l under the frame support roll-in
B1=2210mm, l
B2=2210mm, 1
#With 2
#The critical slip factor value ψ of frame
1 *=0.42, ψ
2 *=0.41,1
#With 2
#The critical slip injury index value of frame
5.2
Subsequently, in step 2, collect the technological lubrication characterisitic parameter of secondary cold-rolling unit, comprise the maximum stream flow w of emulsion
Max=5.2l/min; Cmax C
Max=15%; Minimum temperature and maximum temperature T that emulsion allows
Min=50 ℃, T
Max=65 ℃;
Subsequently, in step 3, collect the crucial rolling technological parameter of treating rolled band steel, mainly comprise: the cross direction profiles value L that comes flitch shape
i=0, the width B=824mm of band, supplied materials thickness H=0.155mm, total drafts ε
0=35%, drafts distribution coefficient ξ=0.95 between 1# and the 2# frame, forward pull setting value T
1=155Mpa, middle tension force setting value T
2=218Mpa, backward pull setting value T
0=133Mpa, 1
#Frame intermediate calender rolls shifting amount δ
1=75mm, 2
#Frame intermediate calender rolls shifting amount δ
2=75mm, 1
#Frame work roll bending power S
1w=8.4t, 1
#Frame intermediate calender rolls bending roller force S
1m=9.2t, 2
#Frame work roll bending power S
2w=7.6t, 2
#Frame intermediate calender rolls bending roller force S
2m=8.3t;
Subsequently, in step 4, the initial set value G of given emulsion complex optimum object function
0=1.0 * 10
20
Subsequently, in step 5, set emulsion temperature pilot process calculating parameter k
1=0, the temperature step-size in search is Δ T=1.5 ℃;
Subsequently, in step 6, given emulsion temperature is T
c=T
Min+ k
1Δ T=50 ℃;
Subsequently, in step 7, set concentration of emulsion used process calculating parameter k
2=1, the concentration step-size in search is Δ C=0.8%;
Subsequently, in step 8, given concentration of emulsion used is C=k
2Δ C=0.8%;
Subsequently, in step 9, set emulsion discharge process calculating parameter k
3=1, the flow step-size in search is Δ w=0.05l/min;
Subsequently, in step 10, given emulsion flow is w=k
3Δ w=0.05l/min;
Subsequently, in step 11, calculate the thermal conductivity factor k=2876J/ (sm under the current technological lubrication condition
2℃), 1# frame coefficientoffriction
1=0.05,2# frame coefficient of friction μ
2=0.09;
Subsequently, in step 12, calculate the 1# under current technological lubrication condition and the rolling technological parameter, the value ψ of 2# frame slip factor
1=0.35, ψ
2=0.38;
Subsequently; In step 13; Do you judge whether inequality
is set up simultaneously? Obviously set up, change step 14 over to;
Subsequently; In step 14, calculate the 1# under the current technological lubrication condition, the value
of 2# frame slip injury index
Subsequently; In step 15; Do you judge whether inequality
is set up simultaneously? Obviously set up, change step 16 over to;
Subsequently, in step 16, calculate 1# frame and the draught pressure P of 2# frame under the current technological lubrication condition
1=350t, P
2=285t;
Subsequently, in step 17, calculate 1# frame and 2# frame work roll thermal crown Δ D under the current technological lubrication condition
W1i, Δ D
W2i, distribution curve is shown in accompanying drawing 2, accompanying drawing 3;
Subsequently, in step 18, calculate the band exit plate shape σ of 2# frame under the hot convexity of work at present roller, intermediate calender rolls and backing roll
2i, distribution curve is shown in accompanying drawing 4;
Subsequently, in step 19, calculate the oil consumption index k of unit
y=Cw=0.008*0.05=0.0004;
Subsequently, in step 20, calculate unit resid amount index
(Residual oil characteristic coefficient
);
Subsequently, in step 21, calculate emulsion complex optimum object function G (X)=(k under the current technological lubrication condition
y)
α(k
c)
β((max (σ
2i)-min (σ
2i))/T
1)=0.32;
Subsequently, in step 22, compare G (X) and G
0Size, if inequality G (X) p G
0, G then
0=G (X),
C
*=C, w
*=w;
Subsequently, in step 23, judge inequality w≤w
MaxSet up? Obviously, inequality is set up, and then makes k
3=k
3+ 1 changes step 10 over to;
Subsequently, in step 24, judge inequality C≤C
MaxSet up? Obviously, inequality is set up, and then makes k
2=k
2+ 1 changes step 8 over to;
Subsequently, in step 25, judge inequality T
c≤T
MaxSet up? Obviously, inequality is set up, and then makes k
1=k
1+ 1 changes step 6 over to;
Subsequently, in step 26, the optimum setting value of output emulsion
C
*=6.4%, w
*=4.5l/min.
At last; Compare for ease; As shown in table 1; List respectively and adopt comprehensively optimizing process lubrication system technology under the secondary cold-rolling unit rolling mode according to the invention and technological lubrication system that draws and the technological lubrication system that adopts conventional method to provide, and provide corresponding practical rolling speed, plate shape value, resid amount.
Table 1 adopts comprehensively optimizing process lubrication system skill under the secondary cold-rolling unit rolling mode according to the invention
Art provides pre-set parameter with adopting conventional method
Rolling technological parameter |
Conventional method |
Technology according to the invention |
Mill speed (m/min) |
672 |
923 |
Production board shape (I) |
8.2 |
6.5 |
Average surface resid amount (mg/m
2)
|
134.38 |
66.16 |
Concentration of emulsion used (%) |
8.2 |
6.4 |
Emulsion flow (l/min) |
4.9 |
4.5 |
The emulsion temperature (℃) |
59 |
60.5 |
Can find out that through table 1 adopt the method for the invention to compare with conventional method, mill speed is brought up to 923m/min from 672m/min, has improved 37.4%; Plate shape drops to 6.5I from 8.2I, has descended 20.7%; The belt steel surface resid amount is from 134.88mg/m
2Drop to 66.16mg/m
2, descended 51%.This explanation adopts the method for the invention can effectively improve the output and the quality of product.
Second embodiment
In order further to set forth basic thought of the present invention; Existing is that 0.18mm * 968mm, steel grade are that the band steel of MR DR-8BA is an example again with the specification, further describes specific secondary cold-rolling unit by accompanying drawing 1 and describes the comprehensively optimizing process lubrication system implementation procedure under its rolling mode.。
At first, in step 1, the device parameter of collecting the secondary cold-rolling unit mainly comprises: 1
#With 2
#Frame work roll diameter D
W1=560mm, D
W2=560mm, 1
#With 2
#Frame intermediate calender rolls diameter D
M1=560mm, D
M2=560mm, 1
#With 2
#Frame support roller diameter D
B1=1000mm, D
B2=1000mm, 1
#Frame working roll and intermediate calender rolls and backing roll roll shape distribution Δ D
1wi=0, Δ D
1mi=0, Δ D
1bi=0,2
#Frame working roll and intermediate calender rolls and backing roll roll shape distribution Δ D
2w1=0, Δ D
2mi=0, Δ D
2bi=0,1
#With 2
#Frame working roll barrel length L
W1=1220mm, L
W2=1220mm, 1
#With 2
#Frame intermediate calender rolls barrel length L
M1=1220mm, L
M2=1220mm, 1
#With 2
#Frame support roller barrel length L
B1=1220mm, L
B2=1220mm, 1
#With 2
#Frame working roll housing screw centre-to-centre spacing l
W1=2200mm, l
W2=2200mm, 1
#With 2
#Frame intermediate calender rolls housing screw centre-to-centre spacing l
M1=2210mm, l
M2=2210mm, 1
#With 2
#Screw centre-to-centre spacing l under the frame support roll-in
B1=2210mm, l
B2=2210mm, 1
#With 2
#The critical slip factor value of frame
1
#With 2
#The critical slip injury index value of frame
Subsequently, in step 2, collect the technological lubrication characterisitic parameter of secondary cold-rolling unit, comprise the maximum stream flow w of emulsion
Max=5.2l/min; Cmax C
Max=15%; Minimum temperature and maximum temperature T that emulsion allows
Min=50 ℃, T
Max=65 ℃;
Subsequently, in step 3, collect the crucial rolling technological parameter of treating rolled band steel, mainly comprise: the cross direction profiles value L that comes flitch shape
i=0, the width B=968mm of band, supplied materials thickness H=0.18mm, total drafts ε
0=18%, drafts distribution coefficient ξ=0.9 between 1# and the 2# frame, forward pull setting value T
1=123Mpa, middle tension force setting value T
2=208Mpa, backward pull setting value T
0=121Mpa, 1
#Frame intermediate calender rolls shifting amount δ
1=75mm, 2
#Frame intermediate calender rolls shifting amount δ
2=75mm, 1
#Frame work roll bending power S
1w=7.5t, 1
#Frame intermediate calender rolls bending roller force S
1m=8.3t, 2
#Frame work roll bending power S
2w=8.4t, 2
#Frame intermediate calender rolls bending roller force S
2m=9.1t;
Subsequently, in step 4, the initial set value G of given emulsion complex optimum object function
0=1.0 * 10
20
Subsequently, in step 5, set emulsion temperature pilot process calculating parameter k
1=0, the temperature step-size in search is Δ T=1.5 ℃;
Subsequently, in step 6, given emulsion temperature is T
c=T
Min+ k
1Δ T=50 ℃;
Subsequently, in step 7, set concentration of emulsion used process calculating parameter k
2=1, the concentration step-size in search is Δ C=0.8%;
Subsequently, in step 8, given concentration of emulsion used is C=k
2Δ C=0.8%;
Subsequently, in step 9, set emulsion discharge process calculating parameter k
3=1, the flow step-size in search is Δ w=0.05l/min;
Subsequently, in step 10, given emulsion flow is w=k
3Δ w=0.05l/min;
Subsequently, in step 11, calculate the thermal conductivity factor k=2942J/ (sm under the current technological lubrication condition
2℃), 1# frame coefficientoffriction
1=0.06,2# frame coefficient of friction μ
2=0.1;
Subsequently, in step 12, calculate the 1# under current technological lubrication condition and the rolling technological parameter, the value ψ of 2# frame slip factor
1=0.29, ψ
2=0.21;
Subsequently; In step 13; Do you judge whether inequality
is set up simultaneously? Obviously set up, change step 14 over to;
Subsequently; In step 14, calculate the 1# under the current technological lubrication condition, the value
of 2# frame slip injury index
Subsequently; In step 15; Do you judge whether inequality
is set up simultaneously? Obviously set up, change step 16 over to;
Subsequently, in step 16, calculate 1# frame and the draught pressure P of 2# frame under the current technological lubrication condition
1=420t, P
2=310t;
Subsequently, in step 17, calculate 1# frame and 2# frame work roll thermal crown Δ D under the current technological lubrication condition
W1i, Δ D
W2i, distribution curve is shown in accompanying drawing 5, accompanying drawing 6;
Subsequently, in step 18, calculate the band exit plate shape σ of 2# frame under the hot convexity of work at present roller, intermediate calender rolls and backing roll
2i, distribution curve is shown in accompanying drawing 7;
Subsequently, in step 19, calculate the oil consumption index k of unit
y=Cw=0.008*0.05=0.0004;
Subsequently, in step 20, calculate unit resid amount index
(Residual oil characteristic coefficient
);
Subsequently, in step 21, calculate emulsion complex optimum object function G (X)=(k under the current technological lubrication condition
y)
α(k
c)
β((max (σ
2i)-min (σ
2i))/T
1)=0.56;
Subsequently, in step 22, compare G (X) and G
0Size, if inequality G (X) p G
0, G then
0=G (X),
C
*=C, w
*=w;
Subsequently, in step 23, judge inequality w≤w
MaxWhether set up, obviously, inequality is set up, and then makes k
3=k
3+ 1 changes step 10 over to;
Subsequently, in step 24, judge inequality C≤C
MaxWhether set up, obviously, inequality is set up, and then makes k
2=k
2+ 1 changes step 8 over to;
Subsequently, in step 25, judge inequality T
c≤T
MaxWhether set up, obviously, inequality is set up, and then makes k
1=k
1+ 1 changes step 6 over to;
Subsequently, in step 26, the optimum setting value of output emulsion
C
*=7.2%, w
*=4.25l/min.
At last; Compare for ease; As shown in table 2; List respectively and adopt comprehensively optimizing process lubrication system technology under the secondary cold-rolling unit rolling mode according to the invention and technological lubrication system that draws and the technological lubrication system that adopts conventional method to provide, and provide corresponding practical rolling speed, plate shape value, resid amount.
Table 2 adopts comprehensively optimizing process lubrication system skill under the secondary cold-rolling unit rolling mode according to the invention
Rolling technological parameter |
Conventional method |
Technology according to the invention |
Mill speed (m/min) |
721 |
?943 |
Production board shape (I) |
8.5 |
?6.8 |
Average surface resid amount (mg/m
2)
|
121.34 |
?73.25 |
Concentration of emulsion used (%) |
11.2 |
?7.2 |
Emulsion flow (l/min) |
5.1 |
?4.25 |
The emulsion temperature (℃) |
60.2 |
?59 |
Can find out that through table 2 adopt the method for the invention to compare with conventional method, mill speed is brought up to 943m/min from 721m/min, has improved 23.5%; Plate shape drops to 6.8I from 8.5I, has descended 20%; The belt steel surface resid amount is from 121.34mg/m
2Drop to 73.25mg/m
2, descended 39.6%.This explanation adopts the method for the invention can effectively improve the output and the quality of product.