CN108405630B - A kind of control method and device of belt plate shape - Google Patents
A kind of control method and device of belt plate shape Download PDFInfo
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- CN108405630B CN108405630B CN201810164342.5A CN201810164342A CN108405630B CN 108405630 B CN108405630 B CN 108405630B CN 201810164342 A CN201810164342 A CN 201810164342A CN 108405630 B CN108405630 B CN 108405630B
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- force
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- lateral stiffness
- variable quantity
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2263/00—Shape of product
- B21B2263/04—Flatness
Abstract
The present invention relates to belt steel rolling technical field more particularly to a kind of control method and device of belt plate shape, comprising: is based on convexity equation, sets zero for the outlet convexity variable quantity of strip, obtain the relationship between bending roller force variable quantity and bending roller force lateral stiffness；Intermediate calender rolls corner flowt value is obtained according to intermediate calender rolls lateral stiffness based on the relationship between bending roller force variable quantity and bending roller force lateral stiffness；Work roll bending force compensating value is obtained according to working roll lateral stiffness based on the relationship between bending roller force variable quantity and bending roller force lateral stiffness；Intermediate roll bending power is compensated using intermediate calender rolls corner flowt value, and work roll bending power is compensated using work roll bending force compensating value.The present invention can increase substantially the setting accuracy of roll-force, reduce rolling fluctuation to adverse effect caused by belt plate shape, avoid belt plate shape from mutating, improve the stability of production, while can also improve production efficiency, reduce accident rate.
Description
Technical field
The present invention relates to belt steel rolling technical field more particularly to a kind of control method and device of belt plate shape.
Background technique
Cold continuous rolling refers to that with coils of hot-rolled steel be raw material, through pickling to remove oxide.Its finished product is to roll hard volume, due to continuous cold
The flow harden of deformation makes to roll the intensity rolled up firmly, hardness rising, the decline of tough modeling index, therefore punching performance will deteriorate, Zhi Nengyong
In the part of simple deformation.
In cold continuous rolling process, the fluctuation of roll-force is often very big, if left, it changes without being controlled, strip
Plate shape necessarily can also change therewith, cause belt plate shape be mutated and production it is unstable.
Summary of the invention
In view of the above problems, it proposes on the present invention overcomes the above problem or at least be partially solved in order to provide one kind
State the control method and device of the belt plate shape of problem.
The embodiment of the present invention provides a kind of control method of belt plate shape, which comprises
Based on convexity equation, set zero for the outlet convexity variable quantity of the strip, obtain bending roller force variable quantity with it is curved
Relationship between roller power lateral stiffness；
It is laterally rigid according to intermediate calender rolls based on the relationship between the bending roller force variable quantity and the bending roller force lateral stiffness
Degree obtains intermediate calender rolls corner flowt value；
It is laterally rigid according to working roll based on the relationship between the bending roller force variable quantity and the bending roller force lateral stiffness
Degree obtains work roll bending force compensating value；
The intermediate calender rolls bending roller force is compensated using the intermediate calender rolls corner flowt value, and utilizes the work
Roll bending force compensating value compensates the work roll bending power.
Preferably, the relationship between the bending roller force variable quantity and the bending roller force lateral stiffness are as follows:
Wherein, Δ FWFor the bending roller force variable quantity, Δ P is roll-force variable quantity, KPFor roll-force lateral stiffness, KFFor the roller
Power lateral stiffness.
Preferably, the intermediate calender rolls corner flowt value is obtained according to the following formula:Wherein, Δ
FIWFor the intermediate calender rolls corner flowt value, α is adjustment factor, and Δ P is roll-force variable quantity, KPFor roll-force lateral stiffness,
KIFor the intermediate calender rolls lateral stiffness.
Preferably, the work roll bending force compensating value is obtained according to the following formula:Wherein, Δ
FWWFor the work roll bending force compensating value, α is adjustment factor, and Δ P is roll-force variable quantity, KPFor roll-force lateral stiffness,
KWFor the working roll lateral stiffness.
Preferably, difference of the roll-force variable quantity between roll-force preset value and the actually detected value of roll-force.
The embodiment of the present invention also provides a kind of control device of belt plate shape, and described device includes:
First obtains module, for being based on convexity equation, sets zero for the outlet convexity variable quantity of the strip, obtains
Relationship between bending roller force variable quantity and bending roller force lateral stiffness；
Second obtains module, for based on the relationship between the bending roller force variable quantity and the bending roller force lateral stiffness,
According to intermediate calender rolls lateral stiffness, intermediate calender rolls corner flowt value is obtained；
Third obtains module, for based on the relationship between the bending roller force variable quantity and the bending roller force lateral stiffness,
According to working roll lateral stiffness, work roll bending force compensating value is obtained；
Compensating module, for being compensated using the intermediate calender rolls corner flowt value to the intermediate calender rolls bending roller force, with
And the work roll bending power is compensated using the work roll bending force compensating value.
Preferably, the relationship between the bending roller force variable quantity and the bending roller force lateral stiffness are as follows:
Wherein, Δ FWFor the bending roller force variable quantity, Δ P is roll-force variable quantity, KPFor roll-force lateral stiffness, KFFor the roller
Power lateral stiffness.
Preferably, the intermediate calender rolls corner flowt value is obtained according to the following formula:Wherein, Δ
FIWFor the intermediate calender rolls corner flowt value, α is adjustment factor, and Δ P is roll-force variable quantity, KPFor roll-force lateral stiffness,
KIFor the intermediate calender rolls lateral stiffness.
Preferably, the work roll bending force compensating value is obtained according to the following formula:Wherein, Δ
FWWFor the work roll bending force compensating value, α is adjustment factor, and Δ P is roll-force variable quantity, KPFor roll-force lateral stiffness,
KWFor the working roll lateral stiffness.
Preferably, difference of the roll-force variable quantity between roll-force preset value and the actually detected value of roll-force.
One or more technical solutions in the embodiment of the present invention, have at least the following technical effects or advantages:
The present invention is primarily based on convexity equation, sets zero for the outlet convexity variable quantity of strip, obtains bending roller force variation
Measure the relationship between bending roller force lateral stiffness, then, based on the relationship between bending roller force variable quantity and bending roller force lateral stiffness,
According to intermediate calender rolls lateral stiffness, intermediate calender rolls corner flowt value is obtained, meanwhile, it is laterally rigid based on bending roller force variable quantity and bending roller force
Relationship between degree obtains work roll bending force compensating value, finally, utilizing intermediate calender rolls bending roller force according to working roll lateral stiffness
Offset compensates intermediate roll bending power, and is mended using work roll bending force compensating value to work roll bending power
It repays, so as to increase substantially the setting accuracy of roll-force, reduces rolling fluctuation to bad shadow caused by belt plate shape
It rings, avoids belt plate shape from mutating, improve the stability of production, while production efficiency can also be improved, reduce accident rate.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, identical component is indicated with identical reference pattern.In the accompanying drawings:
Fig. 1 shows the flow chart of the control method of one of embodiment of the present invention belt plate shape；
Fig. 2 shows the schematic diagrames of the intact plate shape line in the embodiment of the present invention；
Fig. 3 shows the structure chart of the control device of one of embodiment of the present invention belt plate shape.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
The embodiment of the present invention provides a kind of control method of belt plate shape, as shown in Figure 1, which comprises
Step 101: being based on convexity equation, set zero for the outlet convexity variable quantity of strip, obtain bending roller force variable quantity
With the relationship between bending roller force lateral stiffness；
Step 102: laterally rigid according to intermediate calender rolls based on the relationship between bending roller force variable quantity and bending roller force lateral stiffness
Degree obtains intermediate calender rolls corner flowt value；
Step 103: laterally rigid according to working roll based on the relationship between bending roller force variable quantity and bending roller force lateral stiffness
Degree obtains work roll bending force compensating value；
Step 104: intermediate roll bending power being compensated using intermediate calender rolls corner flowt value, and utilizes work roll bending
Roller force compensating value compensates work roll bending power.
Relationship for step 101, between bending roller force variable quantity and bending roller force lateral stiffness are as follows:
Wherein, Δ FWFor bending roller force variable quantity, Δ P is roll-force variable quantity, KPFor roll-force lateral stiffness, KFIt is laterally rigid for bending roller force
Degree.
Specifically, by changing roll-force and adjustment roll crown, roll crown adjusted value is made to offset roll-force just
The changing value of formed bits for mill roller caused by changing, remains good profile.Will obtain good profile roll-force and
Roll crown is made curve, reflects the relationship between roll-force and the roll crown for generating intact plate shape, this curve is referred to as complete
Good plate shape line, as shown in Figure 2.F is the good curve of plate shape, and T is roll crown value horizontal line, the transformation period phase with roll-force
Than, it is believed that the convexity of roll is constant within this time.When roll-force is PA, K point in corresponding diagram can obtain good at this time
Good plate shape.When roll-force is greater than PA, practical convexity is less than convexity required by intact plate shape, will generate side wave defect.When
When roll-force is less than PA, practical convexity is greater than convexity required by intact plate shape, by defect unrestrained in generation.If roll-force changes
It is excessive, it can also make steel edge portion tension abruptly increase, be easy to happen disconnected band.
AGC system and AFC system are two important control functions in modern cold continuous rolling.AGC system mainly passes through control
Roll-force processed has the size for carrying roll gap central point aperture to adjust milling train, to guarantee the thickness and precision of outlet strip.AFC system
Flexible deformation of the roll on strip width direction is then mainly controlled by hydraulic bending roll, realizes the Strip Shape Control to strip.
It is substantially the control to mill roll-gap although AGC and AFC are functionally two independent control systems.It rolled
Cheng Zhong, AGC and AFC are carried out simultaneously, therefore are inevitably present and are intercoupled between both.Mill rolling practice shows
When carrying out Strip Shape Control, influence very little of the hydraulic bending roll to outlet steel strip thickness, it is contemplated that the control of hydraulic bending roll and hydraulic pressing
Response time processed is not much different, therefore can use bending roller force to compensate to the variation of roll-force.If a certain moment rolling
The variable quantity of power is Δ P, and the amounts of thickness variation of rolled piece can be found out according to spring equation:
Δ h=Δ S+ Δ P/Km
Wherein, Δ S is gap values between rollers variable quantity, KmIt needs to follow ratio convex to guarantee that plate shape is good for milling train longitudinal rigidity
Spend identical principle:
Wherein, h is strip exit thickness, ChConvexity, Δ C are exported for striphConvexity variable quantity is exported for strip, according to upper
Stating formula can release:
In addition, can be obtained according to convexity mode:
Wherein, Δ FwFor bending roller force variable quantity, KP is roll-force lateral stiffness, and KF is bending roller force lateral stiffness, thus
It arrives:
Further, since the essence of corner flowt roll-force variation is to be offset using work roll bending power by roll-force
Have caused by variation and carry Gap crown increment, therefore, by Δ ChIt is set as zero, is obtained:
Wherein, G is feedforward shape control gain.
Further, in feedforward shape control functional structure, corner flowt includes intermediate calender rolls corner flowt and work
Roll bending force compensating collective effect changes influence to plate shape to reduce roll-force.Intermediate calender rolls bending roller force and work roll bending power are mended
The calculating mechanism for repaying roll-force variation can be obtained according to above-mentioned formula.
For step 102, intermediate calender rolls corner flowt value is obtained according to the following formula:Its
In, Δ FIWFor intermediate calender rolls corner flowt value, α is adjustment factor, and Δ P is roll-force variable quantity, KPFor roll-force lateral stiffness,
KIFor intermediate calender rolls lateral stiffness.
For step 103, work roll bending force compensating value is obtained according to the following formula:Its
In, Δ FWWFor work roll bending force compensating value, α is adjustment factor, and Δ P is roll-force variable quantity, KPFor roll-force lateral stiffness,
KWFor working roll lateral stiffness.
In this application, difference of the roll-force variable quantity between roll-force preset value and the actually detected value of roll-force.Benefit
Can be advanced optimized with adjustment factor improves plate shape feed forward function, and preferred adjustment factor can take 0.8.In addition, calculating
Before required compensation rolling fluctuation, it is also necessary to be smoothed to practical roll-force, to avoid measurement of rolling force error and roll
Adverse effect caused by fluctuation processed is excessive.
The application is by compensating intermediate roll bending power using intermediate calender rolls corner flowt value, and utilizes working roll
Corner flowt value compensates work roll bending power, the plate shape of the final strip obtained using intermediate calender rolls and working roll rolling
Well, the mutation for reducing the generation of plate shape, improves the stability of production.
Based on the same inventive concept, the embodiment of the present invention also provides a kind of control device of belt plate shape, as shown in figure 3,
Described device includes:
First obtains module 301, for setting zero for the outlet convexity variable quantity of the strip based on convexity equation,
Obtain the relationship between bending roller force variable quantity and bending roller force lateral stiffness；
Second obtains module 302, for based on the pass between the bending roller force variable quantity and the bending roller force lateral stiffness
System obtains intermediate calender rolls corner flowt value according to intermediate calender rolls lateral stiffness；
Third obtains module 303, for based on the pass between the bending roller force variable quantity and the bending roller force lateral stiffness
System obtains work roll bending force compensating value according to working roll lateral stiffness；
Compensating module 304, for being compensated using the intermediate calender rolls corner flowt value to the intermediate calender rolls bending roller force,
And the work roll bending power is compensated using the work roll bending force compensating value.
Preferably, the relationship between the bending roller force variable quantity and the bending roller force lateral stiffness are as follows:
Wherein, Δ FWFor the bending roller force variable quantity, Δ P is roll-force variable quantity, KPFor roll-force lateral stiffness, KFFor the roller
Power lateral stiffness.
Preferably, the intermediate calender rolls corner flowt value is obtained according to the following formula:Wherein, Δ
FIWFor the intermediate calender rolls corner flowt value, α is adjustment factor, and Δ P is roll-force variable quantity, KPFor roll-force lateral stiffness,
KIFor the intermediate calender rolls lateral stiffness.
Preferably, the work roll bending force compensating value is obtained according to the following formula:Wherein, Δ
FWWFor the work roll bending force compensating value, α is adjustment factor, and Δ P is roll-force variable quantity, KPFor roll-force lateral stiffness,
KWFor the working roll lateral stiffness.
Preferably, difference of the roll-force variable quantity between roll-force preset value and the actually detected value of roll-force.
One or more technical solutions in the embodiment of the present invention, have at least the following technical effects or advantages:
The present invention is primarily based on convexity equation, sets zero for the outlet convexity variable quantity of strip, obtains bending roller force variation
Measure the relationship between bending roller force lateral stiffness, then, based on the relationship between bending roller force variable quantity and bending roller force lateral stiffness,
According to intermediate calender rolls lateral stiffness, intermediate calender rolls corner flowt value is obtained, meanwhile, it is laterally rigid based on bending roller force variable quantity and bending roller force
Relationship between degree obtains work roll bending force compensating value, finally, utilizing intermediate calender rolls bending roller force according to working roll lateral stiffness
Offset compensates intermediate roll bending power, and is mended using work roll bending force compensating value to work roll bending power
It repays, so as to increase substantially the setting accuracy of roll-force, reduces rolling fluctuation to bad shadow caused by belt plate shape
It rings, avoids belt plate shape from mutating, improve the stability of production, while production efficiency can also be improved, reduce accident rate.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (4)
1. a kind of control method of belt plate shape, which is characterized in that the described method includes:
Based on convexity equation, zero is set by the outlet convexity variable quantity of the strip, obtains bending roller force variable quantity and bending roller force
Relationship between lateral stiffness；
It is obtained based on the relationship between the bending roller force variable quantity and the bending roller force lateral stiffness according to intermediate calender rolls lateral stiffness
Obtain intermediate calender rolls corner flowt value；
It is obtained based on the relationship between the bending roller force variable quantity and the bending roller force lateral stiffness according to working roll lateral stiffness
Obtain work roll bending force compensating value；
The intermediate calender rolls bending roller force is compensated using the intermediate calender rolls corner flowt value, and utilizes the work roll bending
Roller force compensating value compensates the work roll bending power；
Wherein, the relationship between the bending roller force variable quantity and the bending roller force lateral stiffness are as follows:, whereinFor the bending roller force variable quantity,For roll-force variable quantity,For roll-force lateral stiffness,It is horizontal for the bending roller force
To rigidity；
Wherein, the intermediate calender rolls corner flowt value is obtained according to the following formula:, whereinIt is described
Intermediate calender rolls corner flowt value,For adjustment factor,For roll-force variable quantity,For roll-force lateral stiffness,It is described
Intermediate calender rolls lateral stiffness；
Wherein, the work roll bending force compensating value is obtained according to the following formula:, whereinFor institute
Work roll bending force compensating value is stated,For adjustment factor,For roll-force variable quantity,For roll-force lateral stiffness,For
The working roll lateral stiffness.
2. the control method of belt plate shape as described in claim 1, which is characterized in that the roll-force variable quantity is roll-force
Difference between preset value and the actually detected value of roll-force.
3. a kind of control device of belt plate shape, which is characterized in that described device includes:
First obtains module, for being based on convexity equation, sets zero for the outlet convexity variable quantity of the strip, obtains roller
Relationship between power variable quantity and bending roller force lateral stiffness；
Second obtains module, for based on the relationship between the bending roller force variable quantity and the bending roller force lateral stiffness, according to
Intermediate calender rolls lateral stiffness obtains intermediate calender rolls corner flowt value；
Third obtains module, for based on the relationship between the bending roller force variable quantity and the bending roller force lateral stiffness, according to
Working roll lateral stiffness obtains work roll bending force compensating value；
Compensating module, for being compensated using the intermediate calender rolls corner flowt value to the intermediate calender rolls bending roller force, Yi Jili
The work roll bending power is compensated with the work roll bending force compensating value；
Wherein, the relationship between the bending roller force variable quantity and the bending roller force lateral stiffness are as follows:, whereinFor the bending roller force variable quantity,For roll-force variable quantity,For roll-force lateral stiffness,It is horizontal for the bending roller force
To rigidity；
Wherein, the intermediate calender rolls corner flowt value is obtained according to the following formula:, whereinIt is described
Intermediate calender rolls corner flowt value,For adjustment factor,For roll-force variable quantity,For roll-force lateral stiffness,It is described
Intermediate calender rolls lateral stiffness；
Wherein, the work roll bending force compensating value is obtained according to the following formula:, whereinFor institute
Work roll bending force compensating value is stated,For adjustment factor,For roll-force variable quantity,For roll-force lateral stiffness,For
The working roll lateral stiffness.
4. the control device of belt plate shape as claimed in claim 3, which is characterized in that the roll-force variable quantity is roll-force
Difference between preset value and the actually detected value of roll-force.
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| CN201810164342.5A CN108405630B (en) | 2018-02-27 | 2018-02-27 | A kind of control method and device of belt plate shape |
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| CN201810164342.5A CN108405630B (en) | 2018-02-27 | 2018-02-27 | A kind of control method and device of belt plate shape |
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| CN111250551B (en) * | 2020-01-15 | 2022-03-18 | 首钢京唐钢铁联合有限责任公司 | Method and system for controlling bending force of finishing machine |
| CN111451294B (en) * | 2020-04-08 | 2021-04-02 | 鞍钢股份有限公司 | Method for improving strip shape precision of hot-rolled strip steel |
| CN112246880B (en) * | 2020-09-28 | 2022-03-18 | 武汉钢铁有限公司 | Twenty-high rolling mill strip shape optimization control method based on feedforward-middle shifting compensation |
| CN112474819B (en) * | 2020-11-05 | 2023-03-21 | 通用电气（武汉）自动化有限公司 | Method and device for controlling shape of product |
| CN112588839B (en) * | 2020-11-26 | 2021-11-23 | 燕山大学 | Method and system for compensating bending roller by taking shape control as target |
| CN113857264A (en) * | 2021-09-27 | 2021-12-31 | 日照宝华新材料有限公司 | SPA-H hot-rolled coil shape control method |
| CN114101340B (en) * | 2021-12-01 | 2022-07-29 | 燕山大学 | Method for compensating transverse moving position error of roller |
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