CN103302108A  Optimal setting method for roll force of sixroller temper mill unit  Google Patents
Optimal setting method for roll force of sixroller temper mill unit Download PDFInfo
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 CN103302108A CN103302108A CN2013102760372A CN201310276037A CN103302108A CN 103302108 A CN103302108 A CN 103302108A CN 2013102760372 A CN2013102760372 A CN 2013102760372A CN 201310276037 A CN201310276037 A CN 201310276037A CN 103302108 A CN103302108 A CN 103302108A
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 Prior art keywords
 roll
 planisher
 unit
 force
 enter
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 238000005096 rolling process Methods 0.000 claims abstract description 35
 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
 239000010959 steel Substances 0.000 claims abstract description 28
 238000004519 manufacturing process Methods 0.000 claims abstract description 14
 238000004364 calculation method Methods 0.000 claims description 4
 239000007943 implant Substances 0.000 claims description 4
 230000001264 neutralization Effects 0.000 claims description 4
 210000003491 Skin Anatomy 0.000 claims description 2
 238000005516 engineering process Methods 0.000 abstract description 6
 238000000034 method Methods 0.000 abstract description 6
 238000006467 substitution reaction Methods 0.000 description 8
 238000011084 recovery Methods 0.000 description 3
 238000009499 grossing Methods 0.000 description 2
 230000035939 shock Effects 0.000 description 2
 238000000137 annealing Methods 0.000 description 1
 238000005452 bending Methods 0.000 description 1
 238000010586 diagram Methods 0.000 description 1
 238000005272 metallurgy Methods 0.000 description 1
 230000035945 sensitivity Effects 0.000 description 1
Abstract
The invention relates to an optimal setting method for roll force of a sixroller temper mill unit, and belongs to a strip steel temper rolling production process and a control technology. After a lot of production tests and theory researches, the equipment and process characteristics of the temper rolling process of a sixroller temper mill are fully considered. According to the method, a set of optimal roll force setting values of the temper mill is determined for each type of steel and each specification. When a new specification of product is produced at the first time, a system can give the reasonable roll force setting values. Under the conditions of ensuring that slip factors are in a critical point, calculating the impact response amplitude of the roll force of the temper mill not to be beyond load, and finally being combined with the actual production, the roll force setting values of the temper mill are determined. The bad phenomena of unstable production, break by rolling and the like due to inaccurate setting are reduced. The strip shape controlling stability of the temper mill can be improved, and the yield is increased.
Description
Technical field
The invention belongs to belt steel flating production technology and control technology, particularly the smooth unit rollforce of a kind of six rollers Optimal Setting method.
Background technology
Along with the industrialization degree of society is more and more extensive, Levels of Social Economic Development increases substantially, and has driven the market demand of field of metallurgy Strip (appliance plate and Automobile Plate etc.), also the Strip quality is had higher requirement simultaneously.Smooth as one postorder finishing technique in the cold rolled sheet production, particularly important to the control of product quality.Smooth operation can be by technological parameters such as controlled rolling power, tension force and bending roller forces, to guarantee mechanical performance and the type quality of the rear product of annealing.So the running status of planisher has farthest determined the product lumber recovery, affect the economic benefit of enterprise.
Usually during engineering is used, planisher control is carried out closedloop control according to the percentage elongation of setting to rollforce, only consider that for the setting of smooth unit rollforce plate shape is administered and the limited amplitude of maximum draught pressure in the control procedure, the mean value when providing all gauge strip steel production.When each planisher played parking, the planisher control system was controlled the rollforce of setting first as initial value.Therefore, the order of accuarcy of this rollforce initial set value directly has influence on the transit time that control period product percentage elongation, percentage elongation are adjusted to desired value, and the plate shape of transition period quality.
Because more current planisher rolling force setup value errors are larger, cause closedloop system can produce by a relatively large margin adjustment amount at the control initial stage, the fluctuation of rollforce, percentage elongation is violent, and plate shape is also influenced.Be subjected to the factor affecting such as feedback cycle, device responds cycle and system sensitivity, control system needs longer a period of time rollforce could be adjusted to desired value, sometimes needs nearly 30s, on affecting length approximately about 30m with steel.Patent of the present invention is for this situation, the method that combines by theoretical research and Engineering, find a kind of suitable method that planisher rolling force setup value is optimized, and by production application, significantly improved the planisher rollforce jump situation at control system initial stage.
Summary of the invention
The object of the present invention is to provide the smooth unit rollforce of a kind of six rollers Optimal Setting method, fully take into account the equipment and technology characteristics of the smooth unit smoothing and rolling process of six rollers, guaranteeing that smooth unit does not occur skidding under the prerequisite that meets the demands with shock response, provides suitable planisher rolling force setup value.Improve plate shape and the percentage elongation compliance rate of finished strip, improve the quality of products and lumber recovery.
Technical scheme of the present invention may further comprise the steps (as shown in Figure 1):
1, for the smooth unit of analyze, its equipment of sortingout in statistics and main technologic parameters comprise work roll diameter D
_{W}, the equivalent mass M of backing roll, intermediate calender rolls and working roll
_{b}, M
_{m}, M
_{w}, the equivalent stiffness K of planisher memorial archway
_{m}, backing roll and intermediate calender rolls Contact stiffness K
_{b}, working roll and intermediate calender rolls Contact stiffness K
_{w}, draught pressure maximum P
_{Max}, draught pressure minimum of a value P
_{Min}, enter step 2;
2, according to the actual production data of collecting, and the rollforce accounting equation of setting up, the method for employing regression fit calculates the skin pass rolling power computing formula with steel; Enter step 3;
In the formula: Pgeneral rolling force, unit: N; Fspecial rolling force, unit: N/m; Bstrip width, unit: m; Lthe roll arc length degree that contacts with the strip in the contact in rolling, unit: mm; a
_{0}smooth steel grade influence coefficient; a
_{1}the operating mode influence coefficient; Dwork roll diameter, unit: mm; εband steel percentage elongation; μcoefficient of friction; h
_{0}inlet thickness, unit: mm; σ
_{p}equivalent resistance of deformation, unit: Pa; Estrain rate; Vmill speed, unit: m/s; k
_{3}the resistance of deformation influence coefficient; k
_{2}the backward pull influence coefficient; k
_{1}the forward pull influence coefficient; σ
_{s}band steel yield strength; Unit: Pa; σ
_{0}forward pull, unit: Pa; σ
_{1}backward pull, unit: Pa; k
_{4}, k
_{5}, k
_{6}planisher speed correction factor.
3, determine the belt steel thickness h of planisher
_{0}, strip width B, belt steel flating percentage elongation ε, band steel yield strength σ
_{s}, produce linear velocity v, tensile stress σ before and after the planisher
_{0}, σ
_{1}, calculate planisher rolling force setup value P according to the formula in the step 2, if result of calculation is greater than P
_{Max}, rollforce P=P then
_{Max}When result of calculation less than P
_{Min}, rollforce P=P then
_{Min}Enter step 4;
4, according to formula
, calculate the planisher nip angle, according to formula:
, calculate neutral angle, enter step 5;
In the formula: funit pressure; Bstrip width (m); Q
_{1}, Q
_{0}act on forward pull, backward pull (N) on the rolled piece; αnip angle (radian);
5, calculate slip factor f
_{γ}=γ/α judges whether to satisfy 0.2＜f
_{γ}＜0.8? if satisfy, then enter step 6; If do not satisfy, then make special rolling force f=fsign (γ/α1/2) * sign (Q
_{1}Q
_{0}) * 10000N, enter step 4, if cycleindex does not still satisfy 0.2＜f greater than 1000
_{γ}＜0.8, get the special rolling force f value of last iterative cycles.Enter step 6;
6, according to the planisher structure, set up the 3DOF model of vibration, mechanical model sees accompanying drawing 2 for details, adopts MATLAB software to obtain the numerical solution of vibration equation, calculate the extensional vibration response that applies the planisher after the planisher rollforce, rollforce maximum amplitude P when obtaining vibrating
_{a}, judge P
_{a}＜P
_{Max}Do you whether satisfy? if satisfy, then enter step 7; If do not satisfy, P=P100000N then is if satisfy P this moment〉P
_{Min}, then enter step 4; If P〉P
_{Min}Condition does not satisfy, then P=P
_{Min}, enter step 7;
7, will finish the rolling force setup value P that calculates and write planisher rolling force setup table, and implant control system.
The present invention is through a large amount of pilot production and theoretical research, fully take into account the equipment and technology characteristics of six roller planisher smoothing and rolling process, invented a kind of planisher rollforce Optimal Setting method, according to the method, for each specification of each steel grade is determined the optimum rolling force setup value of one group of planisher, guarantee that system can given rational rolling force setup value when producing the new spec product for the first time.This calculating guarantee slip factor critical point with interior, calculate not excess load of planisher rollforce shock response amplitude, finally in conjunction with practical condition, determine planisher rolling force setup value, reduce because set and forbidden that the production that causes is unstable, the bad phenomenon such as break occurs.Can improve planisher plate shape control stability, improve lumber recovery.
Description of drawings
By the description of accompanying drawing to preferred embodiment of the present invention, can further understand purpose of the present invention, feature and advantage.
Fig. 1 is that the planisher rollforce is calculated and the program calculation process block diagram of Optimal Setting among the present invention.
Fig. 2 is that mechanical model is simplified in planisher extensional vibration.
The specific embodiment
Preferred embodiment of the present invention is below described.
Embodiment 1
In order to set forth basic thought of the present invention, existing take the smooth unit of certain 1,850 six roller as example, by means of Fig. 1 describe specification be 1.2m*1.0mm, steel grade be SPCC with the tension force Optimal Setting process of steel on specific smooth unit.
At first, in step 1, collect equipment and the technological parameter of smooth unit, in step 1, collect equipment and the technological parameter of smooth unit, comprise work roll diameter 550mm, the equivalent mass 5.4*10 of backing roll, intermediate calender rolls and working roll
^{4}Kg, 7.02*10
^{3}Kg, 4.71*10
^{3}Kg, the equivalent stiffness 7.5*10 of planisher memorial archway
^{10}N/m, backing roll and intermediate calender rolls Contact rigidity 1.0*10
^{10}N/m, working roll and intermediate calender rolls Contact rigidity 0.5*10
^{10}N/m, draught pressure maximum 12*10
^{6}N, draught pressure minimum of a value 6*10
^{5}N enters step 2;
In step 2, the arrangement Field Production Data is with planisher and band steel relevant parameter substitution planisher rollforce computing formula
Adopt matlab multidimensional match function f minsearch that sample is carried out match, obtain after the match: a0=11.776573, a1=4.7147225, k3=0.000580898, a=64153.172, k1=0.3, k2=0.7, k4=178.83734, k5=9159.3527, k6=30439.591.Enter step 3;
Subsequently, in step 3, comprise strip width B=1.2m, thickness h=1mm, percentage elongation ε=0.01, tensile strength sigma with treating in the formula of smooth characteristic parameter substitution step 2 with steel
_{b}=360*10
^{6}Pa; Tension force Q before and after the planisher
_{1}=Q
_{0}=45*10
^{3}N, smooth speed is 6m/s, coefficient of friction is 0.11.Calculating the planisher rollforce is 3.32*10
^{6}N.Enter step 4;
Subsequently, in step 4, according to formula
, calculating the planisher nip angle is 0.005934 radian (0.34 °).Then nip angle is updated to formula:
, obtain neutral angle for being about 0.00288 radian (0.165 °), enter step 5.
In step 5, according to formula slip factor f
_{γ}=γ/α calculates slip factor=0.48, satisfies "＜0.8 and〉0.2 ", enters step 6;
In step 6, with planisher parameter substitution model of vibration, obtain planisher rollforce maximum amplitude 4.3*10
^{6}N, "＜draught pressure maximum 12*10 satisfies condition
^{6}N ", enter step, 7;
In step 7, rolling force setup value P is write planisher rolling force setup table, and implant control system.
Embodiment 2
In order further to illustrate the design philosophy of patent, existing take the smooth unit of certain 1,850 six roller as example, by means of Fig. 1 describe specification be 1.7m*0.65mm, steel grade be Trip780 with the tension force Optimal Setting process of steel on specific smooth unit.
At first, in step 1, collect equipment and the technological parameter of smooth unit, in step 1, collect equipment and the technological parameter of smooth unit, comprise work roll diameter 550mm, the equivalent mass 5.4*10 of backing roll, intermediate calender rolls and working roll
^{4}Kg, 7.02*10
^{3}Kg, 4.71*10
^{3}Kg, the equivalent stiffness 7.5*10 of planisher memorial archway
^{10}N/m, backing roll and intermediate calender rolls Contact rigidity 1.0*10
^{10}N/m, working roll and intermediate calender rolls Contact rigidity 0.5*10
^{10}N/m, draught pressure maximum 12*10
^{6}N, draught pressure minimum of a value 0.6*10
^{6}N enters step 2;
In step 2, the arrangement Field Production Data is with planisher and band steel relevant parameter substitution planisher rollforce computing formula
Adopt matlab multidimensional match function f minsearch that sample is carried out match, obtain a0=11.776573, a1=4.7147225 after the match, k3=0.000580898, a=64153.172, k1=0.3, k2=0.7, k4=178.83734, k5=9159.3527, k6=30439.591.Enter step 3;
Subsequently, in step 3, comprise strip width B=1.7m, thickness h=0.65mm, percentage elongation ε=0.008, tensile strength sigma with treating in the formula of smooth characteristic parameter substitution step 2 with steel
_{b}=780*10
^{6}Pa; Tension force Q before and after the planisher
_{1}=Q
_{0}=85*10
^{3}N, smooth speed is 6m/s, coefficient of friction is 0.11.Calculating the planisher rollforce is 15.9*10
^{6}N, "〉Pmax=12*10 because the rollforce that calculates satisfies condition
^{6}N ", therefore setting the planisher rollforce is 12*10
^{6}N.
Subsequently, in step 4, according to formula
, calculating the planisher nip angle is 0.004294 radian (0.246 °).Then nip angle is updated to formula:
, obtain neutral angle for being about 0.002094 radian (0.12 °), enter step 5;
In step 5, according to formula slip factor f
_{γ}=γ/α calculates slip factor=0.49, satisfy＜0.8 and 0.2, enter step 6;
In step 6, with planisher parameter substitution model of vibration, obtain planisher rollforce maximum amplitude 17.3*10
^{6}N, "＜draught pressure maximum 12*10 does not satisfy condition
^{6}N ", make planisher rollforce P=P100000N * 10
^{6}N=11.9*10
^{6}, because satisfy P〉and 0.6*10
^{6}, enter step 4;
……
In the step 4, with P=11.9*10
^{6}N is updated to computing formula, finally calculates slip factor f
_{γ}=γ/α=0.49 enters step 5;
In step 5, slip factor=0.49, satisfy＜0.8 and 0.2, enter step 6;
In step 6, with planisher parameter substitution model of vibration, obtain planisher rollforce maximum amplitude 17.14*10
^{6}N, "＜draught pressure maximum 12*10 does not satisfy condition
^{6}N ".Make planisher rollforce P=P100000N=11.8*10
^{6}, because satisfy P〉and 0.6*10
^{6}, then enter step 4;
……
In the step 4, with P=8.3*10
^{6}N is updated to computing formula, finally calculates slip factor f
_{γ}=γ/α=0.49 enters step 5;
In step 5, slip factor=0.49, satisfy＜0.8 and 0.2, enter step 6;
In step 6, with parameter substitution model of vibration, obtain planisher rollforce maximum impact response amplitude 11.9*10
^{6}N, the planisher maximum rolling force amplitude that satisfies condition＜draught pressure maximum 12*10
^{6}N; Enter step 7;
In step 7, with rolling force setup value P=8.3*10
^{6}N writes planisher rolling force setup table, and implants control system.
Claims (1)
1. the smooth unit rollforce of a roller Optimal Setting method is characterized in that, may further comprise the steps:
(1) for the smooth unit of analyze, sortingout in statistics equipment and technological parameter comprise work roll diameter D
_{W}, the equivalent mass M of backing roll, intermediate calender rolls and working roll
_{b}, M
_{m}, M
_{w}, the equivalent stiffness K of planisher memorial archway
_{m}, backing roll and intermediate calender rolls Contact stiffness K
_{b}, working roll and intermediate calender rolls Contact stiffness K
_{w}, draught pressure maximum P
_{Max}, draught pressure minimum of a value P
_{Min}, enter step (2);
(2) according to the actual production data of collecting, and the rollforce accounting equation of setting up, the method for employing regression fit calculates the skin pass rolling power computing formula with steel; Enter step 3;
In the formula: Pgeneral rolling force, unit: N; Fspecial rolling force, unit: N/m; Bstrip width, unit: m; Lthe roll arc length degree that contacts with the strip in the contact in rolling, unit: mm; a
_{0}smooth steel grade influence coefficient; a
_{1}the operating mode influence coefficient; Dwork roll diameter, unit: mm; εband steel percentage elongation; μcoefficient of friction; h
_{0}inlet thickness, unit: mm; σ
_{p}equivalent resistance of deformation, unit: Pa; Estrain rate; Vmill speed, unit: m/s; k
_{3}the resistance of deformation influence coefficient; k
_{2}the backward pull influence coefficient; k
_{1}the forward pull influence coefficient; σ
_{s}band steel yield strength, unit: Pa; σ
_{0}forward pull, unit: Pa; σ
_{1}backward pull, unit: Pa; k
_{4}, k
_{5}, k
_{6}planisher speed correction factor;
(3) determine the belt steel thickness h of planisher
_{0}, strip width B, belt steel flating percentage elongation ε, band steel yield strength σ
_{s}, produce linear velocity v, tensile stress σ before and after the planisher
_{0}, σ
_{1}, calculate planisher rolling force setup value P according to the formula in the step (2), if result of calculation is greater than P
_{Max}, rollforce P=P then
_{Max}When result of calculation less than P
_{Min}, rollforce P=P then
_{Min}Enter step (4);
(4) according to formula
, calculate the planisher nip angle, according to formula:
, calculate neutral angle, enter step (5);
In the formula: funit pressure; Bstrip width (m); Q
_{1}, Q
_{0}act on forward pull, backward pull (N) on the rolled piece; αnip angle (radian);
(5), calculate slip factor f
_{γ}=γ/α judges whether to satisfy 0.2＜f
_{γ}＜0.8? if satisfy, then enter step (6); If do not satisfy, then make special rolling force f=fsign (γ/α1/2) * sign (Q
_{1}Q
_{0}) * 10000N, enter step (4), if cycleindex does not still satisfy 0.2＜f greater than 1000
_{γ}＜0.8, get the special rolling force f value of last iterative cycles; Enter step (6);
(6), according to the planisher structure, set up the 3DOF model of vibration, mechanical model adopts MATLAB software to obtain the numerical solution of vibration equation, calculates the extensional vibration response that applies the planisher after the planisher rollforce, rollforce maximum amplitude P when obtaining vibrating
_{a}, judge P
_{a}＜P
_{Max}Do you whether satisfy? if satisfy, then enter step (7); If do not satisfy, P=P100000N then is if satisfy P this moment〉P
_{Min}, then enter step (4); If P〉P
_{Min}Condition does not satisfy, then P=P
_{Min}, enter step (7);
(7) will finish the rolling force setup value P that calculates and write planisher rolling force setup table, and implant control system.
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CN201310276037.2A CN103302108B (en)  20130702  20130702  Optimal setting method for roll force of sixroller temper mill unit 
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Cited By (10)
Publication number  Priority date  Publication date  Assignee  Title 

CN104001739A (en) *  20140514  20140827  中冶南方工程技术有限公司  Method and device for obtaining cold rolling temper rolling pressure 
CN104128376A (en) *  20140623  20141105  中国重型机械研究院股份公司  Highspeed ultrathin band steel finishingunit vibration calculation method 
CN104785539B (en) *  20140121  20170104  宝山钢铁股份有限公司  A kind of method compensated for the tension optimization of rollforce regulation 
CN106707742A (en) *  20151201  20170524  江苏九天光电科技有限公司  Method for optimizing front and back tensions of turning roll suitable for nickelplating continuous production line 
CN107008766A (en) *  20170614  20170804  中山中粤马口铁工业有限公司  A kind of method that single stand fourroller planisher produces DR BA black plates 
CN107609301A (en) *  20170928  20180119  中冶南方工程技术有限公司  A kind of method that band processing thread tension setting is calculated using adaptive algorithm 
CN108326049A (en) *  20171222  20180727  中冶南方工程技术有限公司  A kind of selflearning method of Continuous ColdRolling Force 
CN109590338A (en) *  20170930  20190409  宝山钢铁股份有限公司  For reducing the parameter optimization technique of the rolling least amount of deformation between secondary coldrolling 
CN109840369A (en) *  20190117  20190604  燕山大学  Coldstrip plate profile instrument kinetics design method 
CN110756593A (en) *  20180726  20200207  宝山钢铁股份有限公司  Tension system optimization method for inhibiting vibration of cold continuous rolling unit 
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CN104001739A (en) *  20140514  20140827  中冶南方工程技术有限公司  Method and device for obtaining cold rolling temper rolling pressure 
CN104001739B (en) *  20140514  20151209  中冶南方工程技术有限公司  A kind of acquisition methods of cold rolling levelling draught pressure and device 
CN104128376A (en) *  20140623  20141105  中国重型机械研究院股份公司  Highspeed ultrathin band steel finishingunit vibration calculation method 
CN104128376B (en) *  20140623  20160420  中国重型机械研究院股份公司  A kind of paperthin strip high speed Precise asymptotics vibration calculating method 
CN106707742A (en) *  20151201  20170524  江苏九天光电科技有限公司  Method for optimizing front and back tensions of turning roll suitable for nickelplating continuous production line 
CN107008766A (en) *  20170614  20170804  中山中粤马口铁工业有限公司  A kind of method that single stand fourroller planisher produces DR BA black plates 
CN107609301A (en) *  20170928  20180119  中冶南方工程技术有限公司  A kind of method that band processing thread tension setting is calculated using adaptive algorithm 
CN107609301B (en) *  20170928  20210302  中冶南方工程技术有限公司  Method for calculating tension setting of strip processing line by using selfadaptive algorithm 
CN109590338A (en) *  20170930  20190409  宝山钢铁股份有限公司  For reducing the parameter optimization technique of the rolling least amount of deformation between secondary coldrolling 
CN108326049B (en) *  20171222  20190607  中冶南方工程技术有限公司  A kind of selflearning method of Continuous ColdRolling Force 
CN108326049A (en) *  20171222  20180727  中冶南方工程技术有限公司  A kind of selflearning method of Continuous ColdRolling Force 
CN110756593A (en) *  20180726  20200207  宝山钢铁股份有限公司  Tension system optimization method for inhibiting vibration of cold continuous rolling unit 
CN110756593B (en) *  20180726  20201027  宝山钢铁股份有限公司  Tension system optimization method for inhibiting vibration of cold continuous rolling unit 
CN109840369A (en) *  20190117  20190604  燕山大学  Coldstrip plate profile instrument kinetics design method 
CN109840369B (en) *  20190117  20200811  燕山大学  Design method for transmission scheme of coldrolled strip shape meter 
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