CN105868432B - A kind of simple calculating method of continuous hot-rolling mill working roller - Google Patents

A kind of simple calculating method of continuous hot-rolling mill working roller Download PDF

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CN105868432B
CN105868432B CN201510036728.4A CN201510036728A CN105868432B CN 105868432 B CN105868432 B CN 105868432B CN 201510036728 A CN201510036728 A CN 201510036728A CN 105868432 B CN105868432 B CN 105868432B
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roll
strip
rack
formula
rolling
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CN105868432A (en
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于斌
郭宝安
王存
代兆杰
付青才
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Angang Steel Co Ltd
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Angang Steel Co Ltd
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Abstract

The present invention relates to a kind of simple calculating methods of continuous hot-rolling mill working roller, selection m kind trade mark steel plate is calculated: according to the rolling schedule parameter of m kind trade mark steel plate, a kind of rolling schedule parameter of steel plate is weighted by m kind trade mark steel plate production ratio, if this kind of steel plate is SE steel plate；The initial value of work roll bending power is set as equilibrant force；Roll shifting position is set as initial zero position；By the reduced mechanical model with plate crown, according to the constant principle of strip ratio convexity, optimizes roll shape configuration since last rack Fn, successively calculates Fn-1, Fn-2, F2, F1 roll shape, until arriving finish rolling F1 rack.Advantage is: avoiding the complicated solving process by models such as metal plastic deformation, roll elastic deformations, simple and efficient calculates the best roll shape configuration of milling train, enable to be suitble to a variety of Plate Productions with group roll shape, is suitble to actual production, realizes the good control of Flatness of Hot Rolled Strip.

Description

A kind of simple calculating method of continuous hot-rolling mill working roller
Technical field
The present invention relates to the roll shape field of configuration of continuous hot-rolling mill more particularly to a kind of simplicity of continuous hot-rolling mill working roller Calculation method.
Background technique
In the case where hot finisher type determines, roll shape becomes belt plate shape and controls most direct, most effective means, Many belt plate shape control technologies are carried out around the roll shape for changing roll, and the purpose of working roller design is exactly Guarantee that each rack outlet strip profile and flatness is good as far as possible, finished strip section convexity is qualified.And the calculating of roll shape value is one multiple Miscellaneous process needs the coupling of the models such as simultaneous metal plastic deformation, roll elastic deformation to iteratively solve, and the calculating time is long, roller Type configuration investment field application is slow, can not quickly meet live actual needs.
Summary of the invention
In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a kind of simplicity meters of continuous hot-rolling mill working roller Calculation method, avoids passing through the complicated solving process of the models such as metal plastic deformation, roll elastic deformation, and simple and efficient calculates The best roll shape configuration of milling train, realizes the good control of Flatness of Hot Rolled Strip.
To achieve the above object, the invention is realized by the following technical scheme:
A kind of simple calculating method of continuous hot-rolling mill working roller, comprising the following steps:
1) m ideal format product of live actual production is selected to be calculated: according to the rolling schedule of m typical products Parameter is weighted into the rolling schedule parameter an of product by its annual output ratio, if the strip steel trade mark is SE, weighting Formula are as follows:
In formula (1):Product proportion coefficient；diFor certain typical products annual output；W is each typical products gross annual output amount；I is Ideal format product number；
The thickness parameter of strip SE are as follows:
In formula (2): HjFor strip SE jth rack thickness；hijFor typical products i jth rack thickness；N is to connect Rolling-mill housing number；
The rolling force parameter of strip SE are as follows:
In formula (3): PjFor strip SE jth rack roll-force；fijFor typical products i jth rack roll-force；
2) initial value of work roll bending power is set as equilibrant force；Roll shifting position is set as initial zero position；Input SE steel plate Rolling schedule parameter, by the reduced mechanical model with plate crown, according to the constant principle of strip ratio convexity, from last rack Fn starts to optimize roll shape configuration, successively calculates Fn-1, Fn-2, F2, F1 rack roll shape；
3) each rack roll shape parameter of curve is exported, terminates to calculate.
The calculation formula with plate crown are as follows:
In formula: P is total draught pressure；Kp is the milling train lateral stiffness coefficient for draught pressure；S1For working roll Unilateral bending roller force；KS1For the influence coefficient of work roll bending power；△D1For the synthesis convexity of roll；K1For the influence of roll crown Coefficient；SwFor the roll shifting amount of working roll；KwFor the influence coefficient of working roll roll shifting amount；△HbFor supplied materials strip crown；KbTo carry out flitch The influence coefficient of convexity；σ is the constant for considering front and back tension and influencing.
The constant principle of strip ratio convexity:
c1/h1=C1/H1
In formula: c1、C1Respectively rack entrance and exit band plate crown；h1、H1Respectively rack entrance and exit strip Thickness.
Compared with prior art, the beneficial effects of the present invention are:
The present invention combines production is practical to carry out independent development, avoids through metal plastic deformation, roll elastic deformation etc. The complicated solving process of model, simple and efficient calculates the best roll shape configuration of milling train, enables to be suitble to more specifications with group roll shape The production of multi items strip, is suitable for steel rolling mill's actual production, realizes the good control of Flatness of Hot Rolled Strip.
Detailed description of the invention
Fig. 1 is roll shape calculation flow chart of the invention.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings of the specification, it should be noted that implementation of the invention is unlimited In the following embodiments and the accompanying drawings.
The simple calculating method of continuous hot-rolling mill working roller, comprising the following steps:
1) it selects m ideal format product of produced on-site to be calculated: being joined according to the rolling schedule of m belt steel product Number, a kind of rolling schedule parameter of steel grade is weighted by m (m=1,2,3 ...) a product yield ratio, if the strip steel The trade mark is SE, weighted formula are as follows:
In formula (1):Product proportion coefficient；diFor certain typical products annual output；W is each typical products gross annual output amount；I is Ideal format product number.
The thickness parameter of strip SE is
In formula (2): HjFor strip SE jth rack thickness；hijFor typical products i jth rack thickness；N is to connect Rolling-mill housing number.
The rolling force parameter of strip SE is
In formula (3): PjFor strip SE jth rack roll-force；fijFor typical products i jth rack roll-force.
2) initial value of work roll bending power is set as equilibrant force；Roll shifting position is set as initial zero position；Input SE steel plate Rolling schedule parameter, by the reduced mechanical model with plate crown, according to the constant principle of strip ratio convexity, from last rack Fn starts to optimize roll shape configuration, successively calculates Fn-1, Fn-2, F2, F1 roll shape；
3) each rack roll shape parameter of curve is exported, terminates to calculate.
The calculation formula with plate crown are as follows:
In formula: P is total draught pressure；Kp is the milling train lateral stiffness coefficient for draught pressure；S1For working roll Unilateral bending roller force；KS1For the influence coefficient of work roll bending power；△D1For the synthesis convexity of roll；K1For the influence of roll crown Coefficient；SwFor the roll shifting amount of working roll；KwFor the influence coefficient of working roll roll shifting amount；△HbFor supplied materials strip crown；KbTo carry out flitch The influence coefficient of convexity；σ is the constant for considering front and back tension and influencing.
The constant principle of strip ratio convexity:
c1/h1=C1/H1
In formula: c1、C1Respectively rack entrance and exit band plate crown；h1、H1Respectively rack entrance and exit strip Thickness.
Embodiment:
See Fig. 1, seven rack mm finishing mill unit of hot continuous rolling 1580mm, (m=2) typical products SPHC steel plate of enchashment field two: thick * Width=3.0*1250mm and SPHC steel plate: thick * wide=2.5*1250mm rolling schedule parameter is shown in Tables 1 and 2:
1 product of table, 1 rolling schedule parameter
Rack/parameter F1 F2 F3 F4 F5 F6 F7
Exit thickness H (mm) 22.30 12.70 8.25 5.70 4.43 3.52 3.00
Roll-force P (T) 1905 1780 1550 1500 1120 810 670
2 product of table, 2 rolling schedule parameter
Rack/parameter F1 F2 F3 F4 F5 F6 F7
Exit thickness H (mm) 19.56 12.02 7.63 4.96 3.47 2.78 2.50
Roll-force P (T) 2135 1840 1850 1600 1280 950 770
Two typical products gross annual output amounts are 1,000,000 tons, and wherein 1 annual output of product is 500,000 tons, and 2 annual output of product is 50 Ten thousand tons.Product proportion coefficient is obtained by the weighting of its production ratio according to formula (1):
According to formula (2) and formula (3), it is weighted to the rolling schedule parameter of steel grade SE by its production ratio, is shown in Table 3:
Analogize H2、H3、H4、H5、H6、H7。
Analogize P2、P3、P4、P5、P6、P7。
3 product SE rolling schedule parameter of table
Rack/parameter F1 F2 F3 F4 F5 F6 F7
Exit thickness H (mm) 20.93 12.36 7.94 5.33 3.95 3.15 2.75
Roll-force P (T) 2020 1810 1700 1550 1200 880 720
Band plate crown can be calculated with following formula after rolling:
In formula (4): P is total draught pressure；Kp is the milling train lateral stiffness coefficient for draught pressure；S1For working roll Unilateral bending roller force；KS1For the influence coefficient of work roll bending power；△D1For the synthesis convexity of roll；K1For the shadow of roll crown Ring coefficient；SwFor the roll shifting amount of working roll；KwFor the influence coefficient of working roll roll shifting amount；△HbFor supplied materials strip crown；KbFor supplied materials The influence coefficient of strip crown；σ is the constant for considering front and back tension and influencing.
Model coefficient and the relating to parameters such as material, thickness, width and roll shape and roll shifting position roll actual number by scene It is determined according to returning.It is returned through the practical rolling data in scene are as follows:
Initial bending roller force S is taken in formula (5)1It is 0 ton of equilibrant force relative value, SwFor initial zero position, △ HbThe variation of supplied materials strip crown Value is zero.Strip SE target thickness 2.75mm, target convexity are 45 μm.
According to the constant principle of strip ratio convexity:
c1/h1=C1/H1 (6)
In formula: c1、C1Respectively rack entrance and exit band plate crown；h1、H1Respectively rack entrance and exit strip Thickness.Milling train F1-F7 rack working roller value is calculated, is shown in Table 4:
Each rack Die parameter of table 4
Rack F1 F2 F3 F4 F5 F6 F7
Roll shape value (μm) -423 -229 -129 -75 -62 -61 -60

Claims (2)

1. a kind of simple calculating method of continuous hot-rolling mill working roller, which comprises the following steps:
1) it selects m ideal format product of live actual production to be calculated: being joined according to the rolling schedule of m typical products Number, the rolling schedule parameter an of product is weighted by its annual output ratio, if the strip steel trade mark is SE, weighted formula Are as follows:
In formula (1):Product proportion coefficient；diFor certain typical products annual output；W is each typical products gross annual output amount；I is typical case Specification product number；
The thickness parameter of strip SE are as follows:
In formula (2): HjFor strip SE jth rack thickness；hijFor typical products i jth rack thickness；N is tandem mill Rack number；
The rolling force parameter of strip SE are as follows:
In formula (3): PjFor strip SE jth rack roll-force；fijFor typical products i jth rack roll-force；
2) initial value of work roll bending power is set as equilibrant force；Roll shifting position is set as initial zero position；Input the pressure of SE steel plate Lower rule parameter is opened according to the constant principle of strip ratio convexity from last rack Fn by the reduced mechanical model with plate crown The optimization roll shape that begins configures, and successively calculates Fn-1, Fn-2, F2, F1 rack roll shape；
Calculation formula with plate crown are as follows:
In formula (4): P is total draught pressure；Kp is the milling train lateral stiffness coefficient for draught pressure；S1For the list of working roll Side bending roller force；KS1For the influence coefficient of work roll bending power；△D1For the synthesis convexity of roll；K1For the influence system of roll crown Number；SwFor the roll shifting amount of working roll；KwFor the influence coefficient of working roll roll shifting amount；△HbFor supplied materials strip crown；KbIt is convex to carry out flitch The influence coefficient of degree；σ is the constant for considering front and back tension and influencing；
3) each rack roll shape parameter of curve is exported, terminates to calculate.
2. a kind of simple calculating method of continuous hot-rolling mill working roller according to claim 1, which is characterized in that described The constant principle of strip ratio convexity:
c1/h1=C1/H1
In formula: c1、C1Respectively rack entrance and exit band plate crown；h1、H1Respectively rack entrance and exit steel strip thickness.
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CN110665974B (en) * 2019-10-15 2022-08-09 上海宝钢工业技术服务有限公司 Implementation method for material preparation roller of rolling line finish rolling working roller
CN111027001B (en) * 2019-11-29 2023-08-25 河钢乐亭钢铁有限公司 System and method for calculating roll consumption of hot rolling roll
CN114406010B (en) * 2022-01-07 2023-02-24 北京科技大学 Method for designing roll shape of working roll suitable for endless rolling finishing mill group
CN115971258B (en) * 2023-03-20 2023-05-16 山西建龙实业有限公司 Control method for strip shape and convexity of hot continuous strip mill

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