CN106529037B - Continuous annealing process is to drop tension compensating method of the furnace roller roughness influence of fading as target - Google Patents

Continuous annealing process is to drop tension compensating method of the furnace roller roughness influence of fading as target Download PDF

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Publication number
CN106529037B
CN106529037B CN201610988548.0A CN201610988548A CN106529037B CN 106529037 B CN106529037 B CN 106529037B CN 201610988548 A CN201610988548 A CN 201610988548A CN 106529037 B CN106529037 B CN 106529037B
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furnace roller
roughness
military service
tension
coefficient
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CN106529037A (en
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白振华
刘硕杨
徐纪栓
王云祥
钱承
王瑞
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Tangshan grano Metal Technology Co., Ltd
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Yanshan University
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    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00Computer-aided design [CAD]
    • G06F30/20Design optimisation, verification or simulation

Abstract

A kind of continuous annealing process mainly includes following step performed by computer to drop tension compensating method of the furnace roller roughness influence of fading as target: 1, collecting the key equipment and technological parameter of unit;2, the parameter of strip is collected;3, relevant parameter is defined;4, the reflection current roughness Ra in furnace roller surface is establishedr, furnace roller surface initial roughness Rar0, mathematical model between furnace roller military service milimeter number L;5, coefficient of friction is calculated according to regression model;6, calculating furnace roller military service milimeter number is LiWhen best setting tension sample TLi;7, the mathematical model of relationship between reflection reflection tension compensating value Δ T, furnace roller military service milimeter number L is established;8, tension compensating value Δ T is exported.The present invention is realized to the tension compensating during strip continuous annealing, and in the case where furnace roller roughness constantly decays, the stabilization for improving strip to greatest extent leads to plate.

Description

Continuous annealing process is to drop tension compensating method of the furnace roller roughness influence of fading as target
Technical field
The invention belongs to metallurgical technical field of steel rolling, in particular to a kind of tension compensating side for reducing the decaying of furnace roller roughness Method.
Background technique
Cold-strip steel needs to eliminate processing hardening, residual stress and improvement machine by annealing to reach before finishing The purpose of tool performance.And continuous annealing is due to using the technologies such as quick heating, high annealing, rapid cooling, Wetted constructures, The processes such as cleaning, annealing, smooth, finishing can be integrated, have high-efficient, with short production cycle, suitable produce in enormous quantities Etc. series of advantages and be widely applied.In cold rolling production procedure, continuous annealing unit is increasingly becoming cold rolling organization of production Significant points, and the equipment state of stove section directly affects continuous annealing unit operating condition.In the actual production process, stove section furnace Roll surface roughness variation is one of the focal issue that continuous annealing unit stablizes logical plate[1-4].In continuous annealing unit furnace in each process section, In order to guarantee that roll surface coefficient of friction can satisfy the strip tension holding of continuous annealing unit stove section, and the raising anti-bulk property of roll surface Deng the roll surface of stove section slewing rollers and idler roller is all made of plasma spray technology[5,6].The formation of stove roller surface coatings be by it is equal from The spraying process such as son, supersonic speed, explosion form huge kinetic energy after so that spraying particle is generated high speed, are bonded on furnace roller surface into thickness Spend the coating of about 50mm.Main function is to make roll surface roughness with higher, wearability and inoxidizability, to make strip exist It is synchronous with furnace roller holding during operation, thus avoid due to respect to sliding or oxidation bonding and cause belt steel surface abrade or Furnace sow.
Nevertheless, continuous annealing unit stove section also often will appear the abnormal conditions such as tension drop, band will cause when serious Steel sideslip is close to, wrinkles, until disconnected band, directly affects the high-speed stable running of unit.By in-site measurement and theory analysis It was found that the decaying of furnace roller surface roughness is the major reason for causing tension to drop.And research of the domestic and foreign scholars to this problem It is relatively fewer, lack relevant Treatment process as theoretical direction, scene is often through continuous replacement furnace roller to keep to furnace roller The requirement of roughness achievees the purpose that preventing and treating stove section tension drops, undoubtedly the biggish maintenance cost for increasing equipment, this Sample, how correctly understanding furnace roller surface roughness attenuation and carrying out corresponding tension compensating just becomes site technology tackling key problem Focus.
Bibliography:
[1] Lee can exempt from, Liu Jianxiong, at Li Junhong steel strip in continuous annealing furnace horizontal tension distribution research [J] material heat Reason technology, 2010,39 (04): 148-150.
[2] finite element simulation of strip tensile stress cross direction profiles in Zhang Qingdong, Chang Tiezhu, Dai Jiangbo, Wang Wenguang continuous annealing line [J] University of Science & Technology, Beijing journal, 2006,28 (12): 1162-1166.
[3] Zhang Lixiang, Li Jun, Zhang Li raise research [J] steel of continuous annealing unit strip wooden dipper song critical tension .2012,47 (6): 42-45.
[4] selection of Wang Lu Automobile Plate annealing furnace roller surface covering and the buildup analysis of causes [J] material protection, 2006, 39(11):68-71.
[5] Liu Shunxin, Zhao Zhijian, Hao Ying wait cold rolling to continue annealed strip surface point Defects Forming Mechanism and countermeasure [J] Metal heat treatmet, 2014,39 (9): 147-150.
[6] variation of Wang Jing .CAPL furnace roller surface roughness and analysis [J] metallurgical equipment, 2005, (5): 21-24.
Summary of the invention
That the purpose of the present invention is to provide a kind of workloads is small, can on-line control, can guarantee that strip stablizes logical plate, improves life The continuous annealing process of efficiency is produced to drop tension compensating method of the furnace roller roughness influence of fading as target.
The present invention is mainly sufficiently to combine the equipment and technology feature of continuous annealing unit, has formulated strip and has stablized the comprehensive control of logical plate Index processed, by sideslip of the band in each process section, hot wooden dipper Qu Zuowei constraint condition, establish it is a set of be suitable for continuous annealing process with The tension compensating technology that furnace roller roughness influence of fading is target drops.
The present invention includes following step performed by computer:
(a) key equipment and technological parameter for collecting unit, specifically include that the setting of current process section in continuous annealing unit furnace Tension T, furnace roller military service milimeter number L, furnace roller surface initial roughness Rar0, critical sideslip factor ψ*, critical wooden dipper song index λ*
(b) parameter for collecting strip specifically includes that strip width B, steel strip thickness h, strip Poisson's ratio ν, strip friction system Number regression model factor alpha0、α1、α2、α3, weighting coefficient A1
(c) relevant parameter is defined, specifically includes that the current roughness Ra in furnace roller surfacer, furnace roller surface roughness attenuation coefficient αL, furnace roller surface roughness attenuation coefficient initial value αL0, computational accuracy Σ, the best setting when furnace roller military service milimeter number is L Power TL, number of samples m=10, furnace roller surface initial roughness sample Rar0i, the current roughness profile Ra in furnace roller surfaceri, furnace roller Military service kilometer numerical example Li, furnace roller military service milimeter number is LiWhen best setting tension sample TLi, furnace roller military service milimeter number is LiWhen Best setting tension initial value TLi0, i=1,2, m;Tension compensating value Δ T, the current roughness in furnace roller surface with rub Wipe the regression model factor alpha between coefficient0、α1、α2、α3, regression model coefficient a between tension compensating value and military service milimeter number1、 a2、a3, regression model coefficient initial value a between tension compensating value and military service milimeter number1', a2', a3', band sideslip factor ψ, Band wooden dipper song index λ, weighting coefficient A1, roughness Controlling object function G1(X), strip stablizes logical plate comprehensively control objective function F (X), strip stablizes logical plate comprehensively control objective function initial value F0, tension compensating Controlling object function G2(X);
(d) the reflection current roughness Ra in furnace roller surface is establishedr, furnace roller surface initial roughness Rar0, furnace roller military service milimeter number Mathematical model between L;
(d1) basic model frame is established
(d2) sample is collected, comprising: furnace roller surface initial roughness sample Rar0i, the current roughness profile in furnace roller surface Rari, furnace roller military service kilometer numerical example Li
(d3) furnace roller surface roughness attenuation coefficient initial value α is givenL0And computational accuracy Σ;
(d4) roughness Controlling object function G is calculated1(X);
(d5) judge G1(X) whether≤Σ true? if inequality is invalid, change furnace roller surface roughness attenuation coefficient Initial value αL0, it is transferred to step (d4), is recalculated;If inequality is set up, it is concluded that furnace roller surface roughness attenuation coefficient αL= αL0, and determine the current roughness Ra in furnace roller surfacer, furnace roller surface initial roughness Rar0, number between furnace roller military service milimeter number L Model is learned, step (e) is transferred to;
(e) friction coefficient μ=α is calculated according to regression model01×Rar2×Rar 23×Rar 3
(f) calculating furnace roller military service milimeter number is LiWhen best setting tension sample TLi
(f1) i=1 is enabled;
(f2) giving furnace roller military service milimeter number is LiWhen best setting tension initial value TLi0=0.6T and strip are stablized logical Plate comprehensively control objective function initial value F0
(f3) band sideslip factor ψ, band wooden dipper song index λ and strip are calculated and stablizes logical plate comprehensively control objective function F (X);
(f4) judgeIt is whether true? if inequality is set up, T is savedLi0, it is transferred to step (f5);It is no Then, directly it is transferred to step (f5);
(f5) judge TLi0Whether < 1.4T true? if so, then enable TLi0=TLi0+ 0.1MPa is transferred to step (f3);It is no Then, it is transferred to step (f6);
(f6) do you judge whether i < m true? if inequality is set up, i=i+1 is enabled, step (f2) is transferred to;If inequality at It is vertical, then it is transferred to step (g);
(g) mathematical model of relationship between reflection reflection tension compensating value Δ T, furnace roller military service milimeter number L is established;
(g1) basic model frame Δ T=a is established1L+a2L2+a3L3
(g2) the regression model coefficient initial value a between tension compensating value and military service milimeter number is given1', a2', a3' and meter Calculate precision Σ;
(g3) tension compensating Controlling object function G is calculated2(X);
(g4) judge G2(X) whether≤Σ true? if inequality is invalid, change tension compensating value and military service milimeter number Between regression model coefficient initial value a1', a2', a3', it is transferred to step (g3), is recalculated;If inequality set up, it is concluded that Regression model coefficient a between tension compensating value and military service milimeter number1, a2, a3, and determine that tension compensating value Δ T, furnace roller are on active service Mathematical model between milimeter number L, is transferred to step (h);
(h) tension compensating value Δ T is exported.
The invention has the following advantages over the prior art:
Workload is small, can on-line control, guarantee sideslip does not occur for strip, wooden dipper is bent the defects of and guarantee belt steel material While energy, realizes and the on-line control of strip tension is compensated, greatly improve production efficiency, and guarantee to the full extent Requirement of the downstream process to high-quality template shape realizes continuous annealing unit high speed and stablizes logical plate, create biggish warp for scene Ji benefit, the value with further genralrlization application.
Detailed description of the invention
Fig. 1 is total calculation flow chart of the invention;
Fig. 2 is the calculation flow chart of step (d) of the present invention;
Fig. 3 is the calculation flow chart of step (f) of the present invention;
Fig. 4 is the calculation flow chart of step (g) of the present invention;
Specific embodiment
Embodiment 1
Selection steel grade is the strip of CQ, specification 0.50mm × 1500mm, by taking certain domestic factory's continuous annealing unit as an example, such as Fig. 1 institute The continuous annealing process shown is to drop furnace roller roughness influence of fading as total calculation flow chart of the tension compensating method of target:
Firstly, collecting the key equipment and technological parameter of unit in step a, specifically include that current in continuous annealing unit furnace The setting tension T=6.5MPa of process section, furnace roller military service milimeter number L=1100km, furnace roller surface initial roughness Rar0=5Ra, Critical *=35 sideslip factor ψ, *=0.8 critical wooden dipper song index λ;
Then, as shown in Fig. 2, in stepb, collecting the parameter of strip, strip width B=1500mm, band are specifically included that Steel thickness h=0.5mm, strip Poisson's ratio ν=0.3, strip coefficient of friction regression model factor alpha0=0.2, α1=0.15, α2=- 0.0028、α3=0.00018, weighting coefficient A1=0.4;
Then, in step c, relevant parameter is defined, specifically includes that the current roughness Ra in furnace roller surfacer, furnace roller surface is thick Rugosity attenuation coefficient αL, furnace roller surface roughness attenuation coefficient initial value αL0, computational accuracy Σ, when furnace roller military service milimeter number is L Best setting tension TL, number of samples m=10, furnace roller surface initial roughness sample Rar0i, the current roughness in furnace roller surface Sample Rari, furnace roller military service kilometer numerical example Li, furnace roller military service milimeter number is LiWhen best setting tension sample TLi, furnace roller clothes Labour milimeter number is LiWhen best setting tension initial value TLi0, i=1,2, m;Tension compensating value Δ T, furnace roller surface Regression model factor alpha between current roughness and coefficient of friction0、α1、α2、α3, between tension compensating value and military service milimeter number Regression model coefficient a1、a2、a3, regression model coefficient initial value a between tension compensating value and military service milimeter number1', a2', a3', Band sideslip factor ψ, band wooden dipper song index λ, weighting coefficient A1, roughness Controlling object function G1(X), it is comprehensive to stablize logical plate for strip It closes Controlling object function F (X), strip stablizes logical plate comprehensively control objective function initial value F0, tension compensating Controlling object function G2 (X);
Then, in step d, the reflection current roughness Ra in furnace roller surface is establishedr, furnace roller surface initial roughness Rar0, furnace Mathematical model between roller military service milimeter number L;
Then, in step d1, basic model frame is established
Then, in step d2, sample is collected, comprising: furnace roller surface initial roughness sample Rar01=Rar02=Rar03 =Rar04=Rar05=Rar06=Rar07=Rar08=Rar09=Rar010=5Ra, the current roughness profile Ra in furnace roller surfacer1= 4.3Ra、Rar2=4.4Ra, Rar3=4.3Ra, Rar4=4.5Ra, Rar5=4.4Ra, Rar6=4.2Ra, Rar7=4.4Ra, Rar8 =4.7Ra, Rar8=4.8Ra, Rar9=4.6Ra, Rar10=4.4Ra, furnace roller military service kilometer numerical example L1=550km, L2= 650km、L3=750km, L4=580km, L5=760km, L6=850km, L7=660km, L8=360km, L9=560km, L10 =380km;
Then, in step d3, furnace roller surface roughness attenuation coefficient initial value α is givenL0=0.001 and computational accuracy Σ =0.00001;
Then, in step d4, roughness Controlling object function G is calculated1(X)=5738.6;
Then, do you in step d5, judge whether 5738.6≤0.00001 is true? obviously, inequality is invalid, then changes Furnace roller surface roughness attenuation coefficient initial value αL0, it is transferred to step 4-4, is recalculated;
Then, in step e, friction coefficient μ=0.27 is calculated according to regression model;
Then, as shown in figure 3, in step f, calculating furnace roller military service milimeter number is LiWhen best setting tension sample TLi
Then, in step f1, i=1 is enabled;
Then, in step f2, giving furnace roller military service milimeter number is L1When best setting tension initial value TL10= 3.9MPa and strip stablize logical plate comprehensively control objective function initial value F0=1010
Then, in step f3, band sideslip factor ψ=22, band wooden dipper song index λ=0.36 and strip is calculated and is stablized Logical plate comprehensively control objective function F (X)=0.5;
Then, in step f4, judgementIt is whether true? obviously, inequality is set up, then saves TLi0, it is transferred to Step f5;
Then, do you in step f5, judge whether 3.9 < 9.1 true? obviously, inequality is set up, then enables TLi0=3.9+ 0.1MPa is transferred to step f3;
Then, do you in step f6, judge whether 1 < 10 true? obviously, inequality is set up, then, enables i=1+1, be transferred to step Rapid f2;
Then, as shown in figure 4, in step g, establish reflection reflection tension compensating value Δ T, furnace roller military service milimeter number L it Between relationship mathematical model;
Then, in step g1, basic model frame Δ T=a is established1L+a2L2+a3L3
Then, in step g2, the regression model coefficient initial value a between tension compensating value and military service milimeter number is given1' =0.01, a2'=0.01, a3'=0.01 and computational accuracy Σ=0.00001;
Then, in step g3, tension compensating Controlling object function G is calculated2(X)=582.2;
Then, do you in step g4, judge whether 582.2≤0.00001 is true? obviously, inequality is invalid, then changes and open Regression model coefficient initial value a between force compensating value and military service milimeter number1', a2', a3', it is transferred to step g3, is recalculated;
Then, in step h, tension compensating value Δ T=0.4MPa is exported.
According to above-mentioned result of implementation it is found that being directed to sideslip of the incoming band steel of different size in each process section of continuous annealing unit And wooden dipper song trend can be adjusted under the premise of guaranteeing strip quality by tension compensating.As shown in table 1, for using this Invention front and back indices comparative situation.
The indices comparison of the optimization of table 1 front and back
Embodiment 2
Selection steel grade is the strip of CQ, specification 0.40mm × 1350mm, by taking certain domestic factory's continuous annealing unit as an example:
Firstly, collecting the key equipment and technological parameter of unit in step a, specifically include that current in continuous annealing unit furnace The setting tension T=7MPa of process section, furnace roller military service milimeter number L=1000km, furnace roller surface initial roughness Rar0=4.8Ra, Critical *=35 sideslip factor ψ, *=0.8 critical wooden dipper song index λ
Then, in stepb, the parameter for collecting strip specifically includes that strip width B=1350mm, steel strip thickness h= 0.4mm, strip Poisson's ratio ν=0.3, strip coefficient of friction regression model factor alpha0=0.2, α1=0.15, α2=-0.0028, α3 =0.00018, weighting coefficient A1=0.4;
Then, in step c, relevant parameter is defined, specifically includes that the current roughness Ra in furnace roller surfacer, furnace roller surface is thick Rugosity attenuation coefficient αL, furnace roller surface roughness attenuation coefficient initial value αL0, computational accuracy Σ, when furnace roller military service milimeter number is L Best setting tension TL, number of samples m=10, furnace roller surface initial roughness sample Rar0i, the current roughness in furnace roller surface Sample Rari, furnace roller military service kilometer numerical example Li, furnace roller military service milimeter number is LiWhen best setting tension sample TLi, furnace roller clothes Labour milimeter number is LiWhen best setting tension initial value TLi0, i=1,2, m;Tension compensating value Δ T, furnace roller surface Regression model factor alpha between current roughness and coefficient of friction0、α1、α2、α3, between tension compensating value and military service milimeter number Regression model coefficient a1、a2、a3, regression model coefficient initial value a between tension compensating value and military service milimeter number1', a2', a3', Band sideslip factor ψ, band wooden dipper song index λ, weighting coefficient A1, roughness Controlling object function G1(X), it is comprehensive to stablize logical plate for strip It closes Controlling object function F (X), strip stablizes logical plate comprehensively control objective function initial value F0, tension compensating Controlling object function G2 (X);
Then, in step d, the reflection current roughness Ra in furnace roller surface is establishedr, furnace roller surface initial roughness Rar0, furnace Mathematical model between roller military service milimeter number L;
Then, in step d1, basic model frame is established
Then, in step d2, sample is collected, comprising: furnace roller surface initial roughness sample Rar01=Rar02=Rar03 =Rar04=Rar05=Rar06=Rar07=Rar08=Rar09=Rar010=4.8Ra, the current roughness profile Ra in furnace roller surfacer1 =4.2Ra, Rar2=3.9Ra, Rar3=4.3Ra, Rar4=3.8Ra, Rar5=4.1Ra, Rar6=4.2Ra, Rar7=4.4Ra, Rar8=3.6Ra, Rar8=4.2Ra, Rar9=4.3Ra, Rar10=4.1Ra, furnace roller military service kilometer numerical example L1=440km, L2 =650km, L3=580km, L4=820km, L5=560km, L6=850km, L7=760km, L8=870km, L9=680km, L10=940km;
Then, in step d3, furnace roller surface roughness attenuation coefficient initial value α is givenL0=0.001 and computational accuracy Σ =0.00001;
Then, in step d4, roughness Controlling object function G is calculated1(X)=462.5;
Then, do you in step d5, judge whether 462.5≤0.00001 is true? obviously, inequality is invalid, then changes furnace Roll surface roughness attenuation coefficient initial value αL0, it is transferred to step 4-4, is recalculated;
Then, in step e, friction coefficient μ=0.23 is calculated according to regression model;
Then, in step f, calculating furnace roller military service milimeter number is LiWhen best setting tension sample TLi
Then, in step f1, i=1 is enabled;
Then, in step f2, giving furnace roller military service milimeter number is L1When best setting tension initial value TL10= 4.2MPa and strip stablize logical plate comprehensively control objective function initial value F0=1010
Then, in step f3, band sideslip factor ψ=25, band wooden dipper song index λ=0.32 and strip is calculated and is stablized Logical plate comprehensively control objective function F (X)=0.52;
Then, in step f4, judgementIt is whether true? obviously, inequality is set up, then saves TLi0, turn Enter step f5;
Then, do you in step f5, judge whether 4.2 < 9.8 true? obviously, inequality is set up, then enables TLi0=4.2+ 0.1MPa is transferred to step f3;
Then, do you in step f6, judge whether 1 < 10 true? obviously, inequality is set up, then, enables i=1+1, be transferred to step Rapid f2;
Then, in step g, the number of relationship between reflection reflection tension compensating value Δ T, furnace roller military service milimeter number L is established Learn model;
Then, in step g1, basic model frame Δ T=a is established1L+a2L2+a3L3
Then, in step g2, the regression model coefficient initial value a between tension compensating value and military service milimeter number is given1' =0.01, a2'=0.01, a3'=0.01 and computational accuracy Σ=0.00001;
Then, in step g3, tension compensating Controlling object function G is calculated2(X)=48.2;
Then, do you in step g4, judge whether 48.2≤0.00001 is true? obviously, inequality is invalid, then changes and open Regression model coefficient initial value a between force compensating value and military service milimeter number1', a2', a3', it is transferred to step g3, is recalculated;
Then, in step h, tension compensating value Δ T=0.6MPa is exported.
According to above-mentioned result of implementation it is found that decaying for furnace roller roughness and causing the incoming band steel of different size in continuous annealing Sideslip and wooden dipper song trend in each process section of unit can be adjusted under the premise of guaranteeing strip quality by tension compensating Section.Finally, in order to illustrate the advance of the relevant technologies of the present invention, domestic certain continuous annealing unit logical board defect amount in 2014 is 138t/, this technology applied to the defect level decline in 2015 after the unit after adjustment after a period of time is compatible from 2015 To 14t/, product defects rate drops to 0.0023% from 0.0201%, and ratio of defects has obtained effective control, creates for unit Biggish economic benefit.

Claims (1)

1. a kind of continuous annealing process is to drop tension compensating method of the furnace roller roughness influence of fading as target, it is characterised in that: it is wrapped Include following step performed by computer:
(a) key equipment and technological parameter for collecting unit, specifically include that the setting tension of current process section in continuous annealing unit furnace T, furnace roller military service milimeter number L, furnace roller surface initial roughness Rar0, critical sideslip factor ψ*, critical wooden dipper song index λ*
(b) parameter for collecting strip, specifically includes that strip width B, steel strip thickness h, strip Poisson's ratio ν, furnace roller surface is currently thick Regression model factor alpha between rugosity and coefficient of friction0、α1、α2、α3, weighting coefficient A1
(c) relevant parameter is defined, specifically includes that the current roughness Ra in furnace roller surfacer, furnace roller surface roughness attenuation coefficient αL, furnace Roll surface roughness attenuation coefficient initial value αL0, computational accuracy Σ, best setting tension T when furnace roller military service milimeter number is LL, Number of samples m=10, furnace roller surface initial roughness sample Rar0i, the current roughness profile Ra in furnace roller surfaceri, furnace roller is on active service public Mileage sample Li, furnace roller military service milimeter number is LiWhen best setting tension sample TLi, furnace roller military service milimeter number is LiWhen it is best Set tension initial value TLi0, i=1,2 ..., m;Tension compensating value △ T, between the current roughness in furnace roller surface and coefficient of friction Regression model factor alpha0、α1、α2、α3, regression model coefficient a between tension compensating value and military service milimeter number1、a2、a3, tension Regression model coefficient initial value a between offset and military service milimeter number1', a2', a3', band sideslip factor ψ, band wooden dipper song refers to Number λ, weighting coefficient A1, roughness Controlling object function G1(X), strip stablizes logical plate comprehensively control objective function F (X), and strip is steady Surely lead to plate comprehensively control objective function initial value F0, tension compensating Controlling object function G2(X);
(d) the reflection current roughness Ra in furnace roller surface is establishedr, furnace roller surface initial roughness Rar0, furnace roller military service milimeter number L it Between mathematical model;
(d1) basic model frame is established
(d2) sample is collected, comprising: furnace roller surface initial roughness sample Rar0i, the current roughness profile Ra in furnace roller surfaceri, furnace Roller military service kilometer numerical example Li
(d3) furnace roller surface roughness attenuation coefficient initial value α is givenL0And computational accuracy Σ;
(d4) roughness Controlling object function G is calculated1(X);
(d5) judge G1(X) whether≤Σ is true;If inequality is invalid, it is initial to change furnace roller surface roughness attenuation coefficient Value αL0, it is transferred to step (d4), is recalculated;If inequality is set up, it is concluded that furnace roller surface roughness attenuation coefficient αLL0, and Determine the current roughness Ra in furnace roller surfacer, furnace roller surface initial roughness Rar0, mathematical modulo between furnace roller military service milimeter number L Type is transferred to step (e);
(e) friction coefficient μ=α is calculated according to regression model01×Rar2×Rar 23×Rar 3
(f) calculating furnace roller military service milimeter number is LiWhen best setting tension sample TLi
(f1) i=1 is enabled;
(f2) giving furnace roller military service milimeter number is LiWhen best setting tension initial value TLi0It is comprehensive that=0.6T and strip stablize logical plate Close Controlling object function initial value F0
(f3) band sideslip factor ψ, band wooden dipper song index λ and strip are calculated and stablizes logical plate comprehensively control objective function F (X);
(f4) judgeIt is whether true;If inequality is set up, T is savedLi0, it is transferred to step (f5);Otherwise, directly Switch through into step (f5);
(f5) judge TLi0Whether < 1.4T is true;If so, then enable TLi0=TLi0+ 0.1MPa is transferred to step (f3);Otherwise, turn Enter step (f6);
(f6) judge whether i < m is true;If inequality is set up, i=i+1 is enabled, step (f2) is transferred to;If inequality is set up, It is transferred to step (g);
(g) mathematical model of relationship between reflection tension compensating value △ T, furnace roller military service milimeter number L is established;
(g1) basic model frame △ T=a is established1L+a2L2+a3L3
(g2) the regression model coefficient initial value a between tension compensating value and military service milimeter number is given1', a2', a3' and calculate smart Spend Σ;
(g3) tension compensating Controlling object function G is calculated2(X);
(g4) judge G2(X) whether≤Σ is true;If inequality is invalid, change between tension compensating value and military service milimeter number Regression model coefficient initial value a1', a2', a3', it is transferred to step (g3), is recalculated;If inequality is set up, it is concluded that tension Regression model coefficient a between offset and military service milimeter number1, a2, a3, and determine tension compensating value △ T, furnace roller military service kilometer Mathematical model between number L, is transferred to step (h);
(h) tension compensating value △ T is exported.
CN201610988548.0A 2016-11-10 2016-11-10 Continuous annealing process is to drop tension compensating method of the furnace roller roughness influence of fading as target Expired - Fee Related CN106529037B (en)

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