CN106734239B - Base head and tail width control method and device and constant width machine among a kind of constant width machine - Google Patents
Base head and tail width control method and device and constant width machine among a kind of constant width machine Download PDFInfo
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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
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
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Abstract
The invention belongs to technical field of steel rolling, disclose a kind of constant width machine centre base head and tail width control method characterized by comprising obtain constant width machine subtracts wide amount dw；According to formula: Hi=ai+bi·dw+ciσ obtains the width coefficient of draught H of each Stepped control section in headi；According to formula: Tj=aj+bj·dw+cjσ obtains the width coefficient of draught T of each Stepped control section in tail portionj；Constant width machine fixed value of roller slit calculates step, width coefficient of draught according to each Stepped control section of width coefficient of draught and the tail portion of each Stepped control section in the head respectively, calculates the constant width machine fixed value of roller slit of each Stepped control section of each Stepped control section in the head and tail portion；Short stroke mill operation end to end is executed according to the constant width machine fixed value of roller slit.The present invention provides base head and tail width control method among a kind of constant width machine of promotion width control precision.
Description
Technical field
The present invention relates to technical field of steel rolling, in particular to base head and tail width control method and dress among a kind of constant width machine
It sets and constant width machine.
Background technique
The wide equipment of rougher of hot strip mill control generally comprises constant width machine and edger roll, wherein constant width machine intermediate base width with higher
Regulating power subtracts wide amount range 0-350mm, Hot Line can be made to meet the belt steel product demand of different width specifications, be effectively reduced
Conticaster width adjusting number reduces continuous casting bleed-out, improves slab yield.Therefore, the application of constant width machine is intermediate base width control
The key link of system.
Currently, intermediate base, after constant width machine squeezes, head, the tail of intermediate base will appear the wide phenomenon of mistake, the centre of edger roll is influenced
Base head and tail width is adjusted, and lowers the head and tail width precision of strip.Wide phenomenon, constant width machine needs pair are lost end to end to eliminate intermediate base
The carry out Stepped control end to end of intermediate base, i.e., be divided into several continuous parts for head-tail, and different width control is respectively set,
It is arranged especially by the roll gap end to end of constant width machine and realizes.
But different steel grade hardness, difference subtract wide amount intermediate base required for it coefficient of draught difference end to end.For
Constant width machine head and tail width control technology relies primarily on manual adjustment at present or searches parameter list acquisition, by rule of thumb in actual production
Given parameters value often will appear deviation, occur adjusting insufficient or excessive phenomenon.
Summary of the invention
The present invention provides base head and tail width control method and device and constant width machine among a kind of constant width machine and solves existing skill
The technical issues of intermediate base head and tail width control accuracy difference in art based on Stepped control.
In order to solve the above technical problems, the present invention provides base head and tail width control methods among a kind of constant width machine, comprising:
Obtain constant width machine subtracts wide amount dw；
According to formula: Hi=ai+bi·dw+ciσ obtains the width coefficient of draught H of each Stepped control section in headi；
According to formula: Tj=aj+bj·dw+cjσ obtains the width coefficient of draught T of each Stepped control section in tail portionj；
Constant width machine fixed value of roller slit calculate step, respectively according to the width coefficient of draught of each Stepped control section in the head with
And the width coefficient of draught of each Stepped control section in tail portion, calculate each ladder control of each Stepped control section in the head and tail portion
The constant width machine fixed value of roller slit of section processed；
Short stroke mill operation end to end is executed according to the constant width machine fixed value of roller slit；
Wherein, σ is slab hardness；The aiFor short stroke coefficient of draught initial value, value range 0.67~0.9；biTo subtract
Influence value of the wide amount to the i-th section of coefficient of draught in head；ciIt is slab hardness to the influence value of the i-th section of coefficient of draught in head；The aj
For short stroke coefficient of draught initial value, value range 0.67~0.9；bjTo subtract influence of the wide amount to tail portion jth section coefficient of draught
Value；cjIt is slab hardness to the influence value of tail portion jth section coefficient of draught；I and j is positive integer.
Further, the wide amount dw that subtracts for obtaining constant width machine includes:
The width of plate slab and roughing target width of intermediate base are obtained, and calculates the two difference and obtains controlling always subtracting for wide technique
Width amount；
Dw is measured by the width that subtracts that sencant method iterates to obtain constant width machine.
Further, the constant width machine fixed value of roller slit calculating step includes:
According to formula: Gapi=W0·α+(1.0-Hi) dw, obtain the constant width machine roll gap setting of each Stepped control section in head
Value Gapi；
According to formula: Gapj=W0·α+(1.0-Tj) dw, obtain the constant width machine roll gap setting of each Stepped control section in tail portion
Value Gapj；
According to formula: Gap=W0α+dw obtains constant width machine ontology fixed value of roller slit；
Wherein, the W0For the width of plate slab of the intermediate base, α is the slab thermal expansion coefficient of the intermediate base.
Further, the sencant method iterates to obtain the wide amount dw that subtracts of constant width machine and includes:
Each passage width drafts is calculated, each passage width drafts from starting passage to roughing extreme trace time is obtained；When
When this passage is without edge rolling, drafts 0；When this passage has edge rolling, compare preassignment passage maximum width drafts
With restriction maximum width drafts, taking the half of smaller value in the two is this reduction in pass；
Determine this passage width drafts value range, width drafts minimum value dWMin=0, width drafts maximum
Value dWMax=Min [WPC, WL, MinW_R, MaxF_R]；Wherein, WPC is preassignment passage maximum width drafts limit value；
WL is to limit maximum width drafts limit value；MinW_R is to ensure that the maximum width drafts of minimum strip license width limits
Value；MaxF_R is the maximum width drafts limit value that maximum edge rolling power limits；
This passage width drafts is selected within the scope of width drafts, the meter under the subsequent equal pressure of edge rolling passage
In the case where calculation value, being iterated in value range using sencant method is searched out suitable constant width machine and subtracts wide amount dW so that roughing
Exit width calculated value is equal with target value.
Wherein, when using dWMax, roughing exit width calculated value is still greater than target value, then this passage width pressure measures
DWMax, then start to adjust back pass；When using dWMin, roughing exit width calculated value is still less than target value, the road Ze Zhe
Secondary width pressure measures dWMin, then starts to adjust back pass.
Further, the mill operation of short stroke end to end includes:
After slab head passes through entrance pinch roll 0.3m, start to execute head short stroke control；
When tail portion is apart from entrance pinch roll 0.2m, start to execute tail portion short stroke control.
Further, in head short stroke control and tail portion short stroke control, each position action length is 600mm.
Further, Duan Weisan sections of the head Stepped control；
Duan Weisan sections of the tail portion Stepped control.
A kind of constant width machine centre base head and tail width control device, comprising:
Constant width machine subtracts wide amount and obtains module, and obtain constant width machine subtracts wide amount；
Head coefficient of draught obtains module, subtracts wide amount acquisition module with the constant width machine and is connected, according to the constant width machine
Subtract wide amount and formula: Hi=ai+bi·dw+ciσ obtains the width coefficient of draught of each Stepped control section in head；
Tail portion coefficient of draught obtains module, subtracts wide amount acquisition module with the constant width machine and is connected, according to the constant width machine
Subtract wide amount and formula: Tj=aj+bj·dw+cjσ obtains the width coefficient of draught of each Stepped control section in tail portion；
Constant width machine fixed value of roller slit computing module, obtains module with the head coefficient of draught respectively and tail portion pressure is
Number obtains module and is connected, and calculates constant width machine fixed value of roller slit；And it is sent to constant width machine；
Wherein, σ is slab hardness；The aiFor short stroke coefficient of draught initial value, value range 0.67~0.9；biTo subtract
Influence value of the wide amount to the i-th section of coefficient of draught in head；ciIt is slab hardness to the influence value of the i-th section of coefficient of draught in head；The aj
For short stroke coefficient of draught initial value, value range 0.67~0.9；bjTo subtract influence of the wide amount to tail portion jth section coefficient of draught
Value；cjIt is slab hardness to the influence value of tail portion jth section coefficient of draught；I and j is positive integer.
Further, the constant width machine fixed value of roller slit computing module includes:
Each Stepped control section roll gap computing module in head, according to intermediate base width and formula:
Gapi=W0·α+(1.0-Hi) dw, obtain the constant width machine fixed value of roller slit Gap of each Stepped control section in headi；
Each Stepped control section roll gap computing module in tail portion, according to intermediate base width and formula:
Gapj=W0·α+(1.0-Tj) dw, obtain the constant width machine fixed value of roller slit Gap of each Stepped control section in tail portionj；
Constant width machine ontology roll gap computing module, according to intermediate base width and according to formula:
Gap=W0α+dw obtains constant width machine ontology fixed value of roller slit；
Wherein, the W0For the width of plate slab of the intermediate base, α is the slab thermal expansion coefficient of the intermediate base.
A kind of constant width machine, comprising: base head and tail width control device and constant width machine ontology among the constant width machine.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
Base head and tail width control method among the constant width machine provided in the embodiment of the present application is based on the ladder control end to end of intermediate base
The principle of system, to subtract wide amount as control target, by slab hardness, to subtract wide amount hard to the influence value and slab of head coefficient of draught
Degree establishes the mathematical model of coefficient of draught to the influence value of head coefficient of draught, to fully consider different plates and difference
Product specification realizes that accurate coefficient of draught calculates, meanwhile, it is capable to which specific to each control section of Stepped control, realization is directed to
Property control；To improving the precision and reliability of coefficient of draught on the whole, and have sufficient theory support, avoid through
Test the defect of error and low reliability caused by estimating.
Specific embodiment
The embodiment of the present application is solved by providing base head and tail width control method and device and constant width machine among constant width machine
In the prior art the technical issues of intermediate base head and tail width control accuracy difference based on Stepped control；Promotion fixed width machine width is reached
The technical effect of degree control precision and reliability.
In order to solve the above technical problems, the general thought that the embodiment of the present application provides technical solution is as follows:
Subtract wide amount with constant width machine as control target, and specifically combines slab hardness, subtracts wide amount to head coefficient of draught
Influence value and slab hardness establish the mathematical model of coefficient of draught to the influence value of head coefficient of draught, to fully consider
Different plates and different product specification realize that accurate coefficient of draught calculates；And the roller of constant width machine is calculated based on coefficient of draught
Tailor's range control parameter, executes rolling.It realizes and is directed to different plates, the specificity of specification calculates, and realization theory calculates, and promotion can
By property.
In order to better understand the above technical scheme, below in conjunction with specification and specific embodiment to above-mentioned skill
Art scheme is described in detail, it should be understood that the specific features in the embodiment of the present invention and embodiment are to present techniques side
The detailed description of case, rather than the restriction to technical scheme, in the absence of conflict, the embodiment of the present application and
Technical characteristic in embodiment can be combined with each other.
A kind of constant width machine centre base head and tail width control method, comprising:
Obtain constant width machine subtracts wide amount dw；
According to formula: Hi=ai+bi·dw+ciσ obtains the width coefficient of draught H of each Stepped control section in headi；
According to formula: Tj=aj+bj·dw+cjσ obtains the width coefficient of draught T of each Stepped control section in tail portionj；
Constant width machine fixed value of roller slit calculate step, respectively according to the width coefficient of draught of each Stepped control section in the head with
And the width coefficient of draught of each Stepped control section in tail portion, calculate each ladder control of each Stepped control section in the head and tail portion
The constant width machine fixed value of roller slit of section processed；
Short stroke mill operation end to end is executed according to the constant width machine fixed value of roller slit.
Wherein, σ is slab hardness；The aiFor short stroke coefficient of draught initial value, value range 0.67~0.9；biTo subtract
Influence value of the wide amount to the i-th section of coefficient of draught in head；ciIt is slab hardness to the influence value of the i-th section of coefficient of draught in head；The aj
For short stroke coefficient of draught initial value, value range 0.67~0.9；bjTo subtract influence of the wide amount to tail portion jth section coefficient of draught
Value；cjIt is slab hardness to the influence value of tail portion jth section coefficient of draught；I and j is positive integer.
It should be noted that in adjacent two sections, the short stroke of preceding control section depresses system end to end in Stepped control section
Number initial value is less than rear.The specification of producing line is also considered under normal conditions, it is also contemplated that producing line specification, specification is biggish, due to
Greatly, then the value of parameter is less than normal for the specification variation rolled；Small dimension, producing line is of single specification, then value is bigger than normal.
Specifically, the wide amount dw that subtracts for obtaining constant width machine includes:
The width of plate slab and roughing target width of intermediate base are obtained, and calculates the two difference and obtains controlling always subtracting for wide technique
Width amount；That is, width differential of the intermediate slab before and after controlling wide process flow, can be immediately arrived at by parameter calculating.
Dw is measured by the width that subtracts that sencant method iterates to obtain constant width machine；Control wide process section, generally include constant width machine with
And the equipment such as edger roll are combined, and are operated by executing progressive width adjustment, it is common to complete to control wide target.
The specific method of this step is executed, the wide amount dw that subtracts that the sencant method iterates to obtain constant width machine includes:
Each passage width drafts is calculated, each passage width drafts from starting passage to roughing extreme trace time is obtained；When
When this passage is without edge rolling, drafts 0；When this passage has edge rolling, compare preassignment passage maximum width drafts
With restriction maximum width drafts, taking the half of smaller value in the two is this reduction in pass.
Determine this passage width drafts value range, width drafts minimum value dWMin=0, width drafts maximum
Value dWMax=Min [WPC, WL, MinW_R, MaxF_R]；Wherein, WPC is preassignment passage maximum width drafts limit value；
WL is to limit maximum width drafts limit value；MinW_R is to ensure that the maximum width drafts of minimum strip license width limits
Value；MaxF_R is the maximum width drafts limit value that maximum edge rolling power limits；
This passage width drafts is selected within the scope of width drafts, the meter under the subsequent equal pressure of edge rolling passage
In the case where calculation value, being iterated in value range using sencant method is searched out suitable constant width machine and subtracts wide amount dW so that roughing
Exit width calculated value is equal with target value.
Wherein, when using dWMax, roughing exit width calculated value is still greater than target value, then this passage width pressure measures
DWMax, then start to adjust back pass；When using dWMin, roughing exit width calculated value is still less than target value, the road Ze Zhe
Secondary width pressure measures dWMin, then starts to adjust back pass.
Further, the constant width machine fixed value of roller slit calculating step includes:
According to formula: Gapi=W0·α+(1.0-Hi) dw, obtain the constant width machine roll gap setting of each Stepped control section in head
Value Gapi；
According to formula: Gapj=W0·α+(1.0-Tj) dw, obtain the constant width machine roll gap setting of each Stepped control section in tail portion
Value Gapj；
According to formula: Gap=W0α+dw obtains constant width machine ontology fixed value of roller slit；
Wherein, the W0For the width of plate slab of the intermediate base, α is the slab thermal expansion coefficient of the intermediate base.
Further, the mill operation of short stroke end to end includes:
After slab head passes through entrance pinch roll 0.3m, start to execute head short stroke control；
When tail portion is apart from entrance pinch roll 0.2m, start to execute tail portion short stroke control.
Further, in head short stroke control and tail portion short stroke control, each position action length is 600mm.It protects
Control section appropriate is demonstrate,proved, guarantees that width control is under the standard of being uniformly controlled, guarantees the stability controlled end to end.
Under normal conditions, ladder section of the Stepped control according to different plate and control amount setting different number, this implementation
In example, Duan Weisan sections of the head Stepped control；Duan Weisan sections of the tail portion Stepped control.
The present embodiment is also based on the above method and provides a kind of device.
A kind of constant width machine centre base head and tail width control device, comprising:
Constant width machine subtracts wide amount and obtains module, and obtain constant width machine subtracts wide amount；
Head coefficient of draught obtains module, subtracts wide amount acquisition module with the constant width machine and is connected, according to the constant width machine
Subtract wide amount and formula: Hi=ai+bi·dw+ciσ obtains the width coefficient of draught of each Stepped control section in head；
Tail portion coefficient of draught obtains module, subtracts wide amount acquisition module with the constant width machine and is connected, according to the constant width machine
Subtract wide amount and formula: Tj=aj+bj·dw+cjσ obtains the width coefficient of draught of each Stepped control section in tail portion；
Constant width machine fixed value of roller slit computing module, obtains module with the head coefficient of draught respectively and tail portion pressure is
Number obtains module and is connected, and calculates constant width machine fixed value of roller slit；And it is sent to constant width machine；
Wherein, σ is slab hardness；The aiFor short stroke coefficient of draught initial value, value range 0.67~0.9；biTo subtract
Influence value of the wide amount to the i-th section of coefficient of draught in head；ciIt is slab hardness to the influence value of the i-th section of coefficient of draught in head；The aj
For short stroke coefficient of draught initial value, value range 0.67~0.9；bjTo subtract influence of the wide amount to tail portion jth section coefficient of draught
Value；cjIt is slab hardness to the influence value of tail portion jth section coefficient of draught；I and j is positive integer.
Further, the constant width machine fixed value of roller slit computing module includes:
Each Stepped control section roll gap computing module in head, according to intermediate base width and formula:
Gapi=W0·α+(1.0-Hi) dw, obtain the constant width machine fixed value of roller slit Gap of each Stepped control section in headi；
Each Stepped control section roll gap computing module in tail portion, according to intermediate base width and formula:
Gapj=W0·α+(1.0-Tj) dw, obtain the constant width machine fixed value of roller slit Gap of each Stepped control section in tail portionj；
Constant width machine ontology roll gap computing module, according to intermediate base width and according to formula:
Gap=W0α+dw obtains constant width machine ontology fixed value of roller slit；
Wherein, the W0For the width of plate slab of the intermediate base, α is the slab thermal expansion coefficient of the intermediate base.
The course of work of above-mentioned module has been recorded above, and details are not described herein again.
The present embodiment also proposes a kind of constant width machine based on above-mentioned apparatus.
A kind of constant width machine, comprising: base head and tail width control device and constant width machine ontology among the constant width machine.
Below especially by a product description this programme.
A kind of intermediate base head and tail width autocontrol method for constant width machine subtracts wide amount and steel grade hardness by constant width machine
Calculating, obtain slab each section of coefficient of draught end to end, intermediate base can accurately be controlled end to end, to eliminate intermediate base head
Tail loses wide phenomenon.
With slab number 168003141103, steel grade: for SS400, calculating process is as follows.
After slab is come out of the stove from heating furnace, required parameter is calculated from production control system acquisition width, comprising: width of plate slab
1600mm and target width 1500mm, roughing are rolled using 1+5 mode.
Determine that constant width machine subtracts wide amount:
In width pressure value range, iterated by sencant method search out suitable constant width machine subtract wide amount dW so that
Roughing exit width calculated value is equal with target value.After calculating, constant width machine, vertical roll width reduction amount are as shown in table 1.
1 constant width machine of table, vertical roll width reduction amount setting value
| Milling train | Constant width machine | The first passage of edger roll | Edger roll third passage | The 5th passage of edger roll |
| Subtract wide amount/mm | 142.418 | 20 | 25 | 10 |
Calculate constant width machine coefficient of draught end to end:
Model subtracts wide amount and steel grade hardness according to constant width machine, calculates 6 fixed width head, tail width coefficient of draught.It calculates public
Formula is as follows:
Hi=aH i+bH i*dW+cH i* σ (i=0,1,2)
Ti=aT i+bT i*dW+cT i* σ (i=0,1,2)
In formula, dW subtracts wide amount for what constant width machine calculated；σ is slab hardness；HiFor each section of the coefficient of draught in head；TjFor tail
The coefficient of draught that each section of portion；aH iFor constant term；bH iTo subtract wide amount to the influence value of each section of coefficient of draught in head；cH iIt is hard for slab
Spend the influence value to each section of coefficient of draught in head；aT iFor constant term；bT iTo subtract influence of the wide amount to each section of coefficient of draught in tail portion
Value；cT iIt is slab hardness to the influence value of each section of coefficient of draught in tail portion.After calculating, coefficient of draught is as shown in table 2 end to end.
2 constant width machine of table coefficient of draught setting value end to end
| Coefficient of draught | H0 | H1 | H2 | T2 | H1 | H0 |
| Setting value | 0.8 | 0.93 | 0.98 | 0.99 | 0.98 | 0.92 |
Calculate constant width machine fixed value of roller slit:
Model calculates fixed width head, tail fixed value of roller slit according to head and tail width coefficient of draught.Three head, tail position roll gap
Calculation method is as follows:
Ontology roll gap calculation method:
Gap=W0*α-dW
In formula,For each section of fixed value of roller slit of fixed width chain-drive section；For each section of fixed value of roller slit of fixed width drive end unit；
Gap is constant width machine ontology fixed value of roller slit；W0For width of plate slab；α is slab thermal expansion coefficient.Constant width machine roll gap calculated result is such as
Shown in table 3.
3 constant width machine of table fixed value of roller slit end to end
Execute short stroke control end to end
After constant width machine receives the fixed value of roller slit that model calculates and constant width machine use pattern (walking stop mode), slab is executed
Three-stage squeezes control end to end.Start to execute head short stroke control after entrance pinch roll 0.3m is crossed on slab head, works as tail portion
When to entrance pinch roll -0.2m, start to execute tail portion short stroke control, each position action length 600mm, when outlet pinch roller
Short stroke control terminates after unloading.
By constant width machine, R1 rolling after, R1 outlet actual measurement width average value be 1527.496mm, head width 1532mm,
Tail width 1534.83mm, end to end and body width deviation about 7mm or so.
Provided by the present invention for the intermediate base head and tail width autocontrol method of constant width machine.It is calculated by using sencant method
Constant width machine subtracts wide amount out, subtracts wide amount and slab hardness according to by constant width machine, obtains slab each section of coefficient of draught end to end, can be improved
Intermediate base head and tail width controls precision, so that eliminate intermediate base loses wide phenomenon end to end.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
Base head and tail width control method among the constant width machine provided in the embodiment of the present application is based on the ladder control end to end of intermediate base
The principle of system, to subtract wide amount as control target, by slab hardness, to subtract wide amount hard to the influence value and slab of head coefficient of draught
Degree establishes the mathematical model of coefficient of draught to the influence value of head coefficient of draught, to fully consider different plates and difference
Product specification realizes that accurate coefficient of draught calculates, meanwhile, it is capable to which specific to each control section of Stepped control, realization is directed to
Property control；To improving the precision and reliability of coefficient of draught on the whole, and have sufficient theory support, avoid through
Test the defect of error and low reliability caused by estimating.
It should be noted last that the above specific embodiment is only used to illustrate the technical scheme of the present invention and not to limit it,
Although being described the invention in detail referring to example, those skilled in the art should understand that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit and scope of the technical solution of the present invention, should all cover
In the scope of the claims of the present invention.
Claims (10)
1. base head and tail width control method among a kind of constant width machine characterized by comprising
Obtain constant width machine subtracts wide amount dw；
According to formula: Hi=ai+bi·dw+ciσ obtains the width coefficient of draught H of each Stepped control section in headi；
According to formula: Tj=aj+bj·dw+cjσ obtains the width coefficient of draught T of each Stepped control section in tail portionj；
Constant width machine fixed value of roller slit calculates step, respectively the width coefficient of draught according to each Stepped control section in the head and institute
The width coefficient of draught for stating each Stepped control section in tail portion calculates each Stepped control section of each Stepped control section in the head and tail portion
Constant width machine fixed value of roller slit；
Short stroke mill operation end to end is executed according to the constant width machine fixed value of roller slit；
Wherein, σ is slab hardness；The aiFor short stroke coefficient of draught initial value, value range 0.67~0.9；biTo subtract wide amount
To the influence value of the i-th section of coefficient of draught in head；ciIt is slab hardness to the influence value of the i-th section of coefficient of draught in head；The ajIt is short
Stroke coefficient of draught initial value, value range 0.67~0.9；bjTo subtract wide amount to the influence value of tail portion jth section coefficient of draught；cj
It is slab hardness to the influence value of tail portion jth section coefficient of draught；I and j is positive integer.
2. base head and tail width control method among constant width machine as described in claim 1, which is characterized in that the acquisition constant width machine
The wide amount dw that subtracts include:
Both the width of plate slab and roughing target width of intermediate base are obtained, and is calculated that difference obtains controlling wide technique always subtracts width
Amount；
Dw is measured by the width that subtracts that sencant method iterates to obtain constant width machine.
3. base head and tail width control method among constant width machine as claimed in claim 2, which is characterized in that the constant width machine roll gap
Preset value calculation step includes:
According to formula: Gapi=W0·α+(1.0-Hi) dw, obtain the constant width machine fixed value of roller slit of each Stepped control section in head
Gapi；
According to formula: Gapj=W0·α+(1.0-Tj) dw, obtain the constant width machine fixed value of roller slit of each Stepped control section in tail portion
Gapj；
According to formula: Gap=W0α+dw obtains constant width machine ontology fixed value of roller slit；
Wherein, the W0For the width of plate slab of the intermediate base, α is the slab thermal expansion coefficient of the intermediate base.
4. base head and tail width control method among constant width machine as claimed in claim 2, which is characterized in that the sencant method is repeatedly
The wide amount dw that subtracts that iteration obtains constant width machine includes:
Each passage width drafts is calculated, each passage width drafts from starting passage to roughing extreme trace time is obtained；When this road
When secondary no edge rolling, drafts 0；When this passage has edge rolling, compare preassignment passage maximum width drafts and limit
Determine maximum width drafts, taking the half of smaller value in the two is this reduction in pass；
Determine this passage width drafts value range, width drafts minimum value dWMin=0, width drafts maximum value
DWMax=Min [WPC, WL, MinW_R, MaxF_R]；Wherein, WPC is preassignment passage maximum width drafts limit value；WL
To limit maximum width drafts limit value；MinW_R is to ensure that the maximum width drafts of minimum strip license width limits
Value；MaxF_R is the maximum width drafts limit value that maximum edge rolling power limits；
This passage width drafts is selected within the scope of width drafts, measures calculated value under the subsequent equal pressure of edge rolling passage
In the case where, being iterated in value range using sencant method is searched out suitable constant width machine and subtracts wide amount dW so that roughing exports
Width calculated value is equal with target value；
Wherein, when using dWMax, roughing exit width calculated value is still greater than target value, then this passage width pressure measures
DWMax, then start to adjust back pass；When using dWMin, roughing exit width calculated value is still less than target value, the road Ze Zhe
Secondary width pressure measures dWMin, then starts to adjust back pass.
5. such as base head and tail width control method among the described in any item constant width machines of Claims 1 to 4, which is characterized in that described
Short stroke mill operation includes: end to end
After slab head passes through entrance pinch roll 0.3m, start to execute head short stroke control；
When tail portion is apart from entrance pinch roll 0.2m, start to execute tail portion short stroke control.
6. base head and tail width control method among constant width machine as claimed in claim 5, it is characterised in that:
In head short stroke control and tail portion short stroke control, each position action length is 600mm.
7. base head and tail width control method among constant width machine as claimed in claim 6, it is characterised in that:
Stepped control Duan Weisan sections of head；
Stepped control Duan Weisan sections of tail portion.
8. base head and tail width control device among a kind of constant width machine characterized by comprising
Constant width machine subtracts wide amount and obtains module, and obtain constant width machine subtracts wide amount dw；
Head coefficient of draught obtains module, subtracts wide amount acquisition module with the constant width machine and is connected, subtracts width according to the constant width machine
Amount and formula: Hi=ai+bi·dw+ciσ obtains the width coefficient of draught of each Stepped control section in head；
Tail portion coefficient of draught obtains module, subtracts wide amount acquisition module with the constant width machine and is connected, subtracts width according to the constant width machine
Amount and formula: Tj=aj+bj·dw+cjσ obtains the width coefficient of draught of each Stepped control section in tail portion；
Constant width machine fixed value of roller slit computing module obtains module with the head coefficient of draught respectively and tail portion coefficient of draught obtains
Modulus block is connected, and calculates constant width machine fixed value of roller slit；And it is sent to constant width machine；
Wherein, σ is slab hardness；The HiFor the width coefficient of draught of each Stepped control section in head；The TjFor each ladder in tail portion
The width coefficient of draught of control section；The aiFor short stroke coefficient of draught initial value, value range 0.67~0.9；biTo subtract wide amount
To the influence value of the i-th section of coefficient of draught in head；ciIt is slab hardness to the influence value of the i-th section of coefficient of draught in head；The ajIt is short
Stroke coefficient of draught initial value, value range 0.67~0.9；bjTo subtract wide amount to the influence value of tail portion jth section coefficient of draught；cj
It is slab hardness to the influence value of tail portion jth section coefficient of draught；I and j is positive integer.
9. base head and tail width control device among constant width machine as claimed in claim 8, which is characterized in that the constant width machine roll gap
Preset value calculation module includes:
Each Stepped control section roll gap computing module in head, according to intermediate base width and formula: Gapi=W0·α+(1.0-Hi)·
Dw obtains the constant width machine fixed value of roller slit Gap of each Stepped control section in headi；
Each Stepped control section roll gap computing module in tail portion, according to intermediate base width and formula: Gapj=W0·α+(1.0-Tj)·
Dw obtains the constant width machine fixed value of roller slit Gap of each Stepped control section in tail portionj；
Constant width machine ontology roll gap computing module, according to intermediate base width and according to formula: Gap=W0α+dw, obtains constant width machine
Ontology fixed value of roller slit；
Wherein, the W0For the width of plate slab of the intermediate base, α is the slab thermal expansion coefficient of the intermediate base.
10. a kind of constant width machine characterized by comprising base head and tail width control among constant width machine as claimed in claim 8 or 9
Device and constant width machine ontology processed.
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| CN113083908B (en) * | 2021-03-31 | 2022-11-22 | 北京首钢股份有限公司 | Method and device for controlling width of hot-rolled width-adjusted blank |
| CN113578974B (en) * | 2021-07-28 | 2023-05-30 | 北京首钢股份有限公司 | Vertical roller mill and control method and control system thereof |
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