CN101758085B - Method for control steel plate thickness in cold-rolled plate rolling process - Google Patents
Method for control steel plate thickness in cold-rolled plate rolling process Download PDFInfo
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- CN101758085B CN101758085B CN2009102647458A CN200910264745A CN101758085B CN 101758085 B CN101758085 B CN 101758085B CN 2009102647458 A CN2009102647458 A CN 2009102647458A CN 200910264745 A CN200910264745 A CN 200910264745A CN 101758085 B CN101758085 B CN 101758085B
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Abstract
The invention relates to a method for control steel plate thickness in the cold-rolled plate rolling process, which belongs to the technical field of cold-rolled plate rolling. The method is realized in a way that: two computers are provided and connected with a thickness control device of a cold-rolling mill; the thickness of the steel plate in each rolling pass and the given final rolling thickness are input to one of the two computers; and the other computer is used for displaying the single-side actual thickness of the steel plate, the preset thickness ratio of the steel plates on both sides of working rolls, and the linear velocity ratio of the steel plates on both sides of the working rolls in the rolling process of the cold-rolling mill. The technical scheme can not only save energy and avoid affecting the rolling efficiency, but also avoid enhancing the production cost of enterprises.
Description
Technical field
The invention belongs to the cold-rolled steel sheet rolling technical field, be specifically related to the method for control steel plate thickness in a kind of cold-rolled plate rolling process.
Background technology
As the industry's knowledge of the reason, in order to control the rolling thickness of cold-reduced sheet, at the position, gateway of reversing cold mill (hereinafter to be referred as cold-rolling mill) calibrator is installed all, calibrator is a kind of electronic instrument that utilizes the electromagnetic wave of ray to the steel plate thickness measure, in the cold-rolling mill process that steel plate is rolling back and forth, steel plate thickness by a pair of calibrator difference surveying work roller both sides, steel plate thickness in the operation of rolling is implemented feedforward and FEEDBACK CONTROL, until the steel sheet product that obtains final desired thickness.In the operation of rolling of cold-rolling mill to steel plate, rare have aforesaid two situations that calibrator breaks down simultaneously, yet the situation that the wherein calibrator in two breaks down is but not rarely seen.If two calibrators break down simultaneously; can only shut down so undisputedly; has only the work that recovers cold-rolling mill again with after the whole reparations of two calibrators; otherwise can't obtain the rolled plate of desired thickness; industry claims this phenomenon to be " total blindness " visually; and claim the phenomenon of any fault in two calibrators to be " half-blindness ", because another calibrator still is in serviceable condition.Existing disposal options is: as long as have one to break down in two calibrators; cold-rolling mill is shut down; and another calibrator that does not break down is as yet shut down the state of keeping company that helplessly is in because of cold-rolling mill; that is to say; two calibrators are of close concern to each other, pin down each other, and a usefulness is all to be used; one decreases and all to stop, and Here it is, and people are formed irreversible or claim the common recognition that is difficult to change to the work of two calibrators at present.Yet the applicant thinks that this is a kind of technology prejudice of people, because, be that monolateral calibrator is intact since a calibrator is arranged, not involved by the out of order calibrator of another side, otherwise can cause the pause of production, waste energy and increase the cold-reduced sheet production cost.Therefore, how when in two calibrators wherein a calibrator breaks down the time can guarantee that still the problem that cold-rolling mill works on has become industry to pay close attention to and press for the problem of solution, explore for a long time through the applicant, found result of the above problems, technical scheme described below produces under this background.
Summary of the invention
Task of the present invention is to provide a kind of and still can ensures that cold-rolling mill works on when having a calibrator to break down and measured the thickness of the steel plate that is arranged in the working roll both sides reliably and used and embody energy savings, guarantee the cold-rolling mill rolling efficiency and reduce the method for control steel plate thickness of the cold-rolled plate rolling process of enterprise's production cost by an intact calibrator in two calibrators.
Task of the present invention is finished like this, method for control steel plate thickness in a kind of cold-rolled plate rolling process, be equipped with two computers, and two computers is connected with the thickness control device of cold-rolling mill, the final rolling thickness value of the thickness of each rolling pass of steel plate and setting is input in wherein computer in the two computers, another computer then is used for showing the monolateral actual (real) thickness value of the steel plate of the cold-rolling mill operation of rolling, be positioned at the preset thickness ratio and the linear velocity ratio that is positioned at the steel plate of working roll both sides of the steel plate of working roll both sides, the ratio that equals steel plate muzzle velocity and steel plate entrance velocity with the ratio of steel plate inlet thickness and steel plate exit thickness is a foundation, the value that shows steel plate muzzle velocity and the ratio of steel plate entrance velocity when computer is during greater than the value of steel plate inlet thickness and the ratio of steel plate exit thickness, then reduce the draught pressure of working roll, and the value that shows steel plate muzzle velocity and the ratio of steel plate entrance velocity when computer then increases the draught pressure of working roll during less than the value of steel plate inlet thickness and the ratio of steel plate exit thickness.
The monolateral actual (real) thickness value of steel plate of the present invention is that steel plate is positioned at the inlet of described working roll or the one-tenth-value thickness 1/10 of outlet.
Technical scheme provided by the invention is greater than or less than the draught pressure that steel plate inlet thickness and the value of the ratio of steel plate exit thickness are adjusted working roll by the value to steel plate muzzle velocity and the ratio of steel plate entrance velocity, therefore, even have a calibrator to break down in two calibrators that are equipped with on the cold-rolling mill, so still can make cold-rolling mill keep duty, thereby but both energy savings and avoid influence of rolled efficient can be avoided the raising of enterprise's production cost again.
Description of drawings
Accompanying drawing is the application examples schematic diagram of the inventive method on reversing cold mill.
The specific embodiment
In order to embody the terseness in the statement, the applicant uses v respectively with entrance velocity, inlet thickness, muzzle velocity and exit thickness
Go into, h
Go into, v
Go outAnd h
Go outExpression is according to the second flow amount constant principle of cold-rolling mill in the rolled plate process: h
Go into* v
Go into=h
Go out* v
Go out, promptly the product of inlet thickness and entrance velocity equals the product of exit thickness and muzzle velocity.Each coil of strip expects that from former finished product (rolling into product) all has a predetermined rolling schedule (rolling procedure), each rolling pass in this rolling schedule all has the preset thickness of entrance and exit, and the steel plate thickness in the actual operation of rolling is rolled according to aforesaid default rules.
Adopt two computers, with the thickness control device that itself is equipped with on computer and the cold-rolling mill is that the THICKNESS CONTROL program is connected, the thickness of each rolling pass of steel plate and the final rolling thickness value that sets are input on wherein computer in the two computers, and another computer then is used for being presented at the monolateral actual (real) thickness value (being positioned at the inlet of working roll or the value of outlet) in the operation of rolling, default steel plate both sides thickness ratio (being positioned at the ratio of the inlet/outlet of working roll both sides) and the linear velocity ratio that is positioned at the steel plate of working roll both sides.By second flow amount formula h
Go into* v
Go into=h
Go out* v
Go outAs can be known, h
Go into/ h
Go out=v
Go out/ v
Go intoBe that inlet thickness equals muzzle velocity than exit thickness and compares entrance velocity, and thickness is set in computer, it also is required rolling target thickness in the operation of rolling, therefore its ratio is constant, in view of the above as long as the target thickness ratio that whether equals to set in the computer according to the velocity ratio of the steel band on working roll both sides, know that just the steel band that shuts out is to approach partially or thick partially.So, when to fault is arranged the steel plate rolling of calibrator one side the time, whether equal inlet/outlet preset thickness ratio according to the gateway velocity ratio, thus the thickness whether thickness that deducibility goes out to shut out equals to preset.When the gateway velocity ratio compares greater than the preset thickness of inlet/outlet, illustrate that the actual (real) thickness that shuts out is than default thin thickness, at this moment need to reduce roll-force, make two vertical intervals between the working roll become big, make the steel plate actual (real) thickness that shuts out become thicker and reach consistent with the thickness of presetting; When the gateway velocity ratio compares less than the preset thickness of inlet/outlet, illustrate that the steel plate actual (real) thickness that shuts out is thicker than default thickness, at this moment need strengthen roll-force, two vertical intervals between the working roll are diminished, make the actual (real) thickness of the steel plate that shuts out become a bit thin and reach consistent with default thickness.
Aforesaid gateway velocity ratio and inlet/outlet thickness are input in the computer than by software, and can on the display screen of computer, show, the thickness ratio of inlet/outlet be presented at computer display screen above, and the velocity ratio of gateway be presented at computer display screen below, because the thickness ratio of inlet/outlet is constant, thereby by checking whether the gateway velocity ratio on the display screen equals the thickness ratio of inlet/outlet, just know the one-tenth-value thickness 1/10 whether one-tenth-value thickness 1/10 of the steel plate that shuts out equals to preset, can't continue rolling problem so just solved prior art (another fault) under the situation of having only a calibrator, improve production efficiency and reduced the production cost of enterprise.
Embodiment:
Ask for an interview accompanying drawing, among the figure: 1. right reel, 2. left reel, 3. upper support roller, 4. lower support roller, 5. top working roll, 6. bottom working roll, 7. right calibrator, 8. left calibrator, 9. steel plate, 10. hydraulic cylinder, 11. right turn rollers, 12. left steering rollers
As shown in drawings, when left calibrator 8 can not use and under the good situation of right calibrator 7, steel plate 9 is from left reel 2 rolling being fine of reel 1 direction to the right, when but reel 2 directions are rolling left from right reel 1 more just dying, because left calibrator 8 can not use, so just can't know in the process how much steel plate thickness that shuts out is, utilize the inventive method can solve this difficult problem: at first prepare 2 computers, the default rolling schedule parameter of input comprises that every time default thickness promptly obtains constant inlet/outlet thickness ratio h in computer therein
Go into/ h
Go out, and show above the computer display screen at another; Measure the speed v of inlet steel plate by right turn roller 11 (it is mounted with velocity sensor and is close to steel band and rotates together)
Go into, left steering roller 12 (it is mounted with velocity sensor and is close to steel band and rotates together) is measured the speed v of outlet steel plate
Go out, simultaneously with two ratio v
Go out/ v
Go intoBelow another computer display screen, show.The velocity ratio v of gateway steel plate on the view screen in the operation of rolling
Go out/ v
Go intoWhether equal constant ratio h
Go into/ h
Go outIf, greater than h
Go into/ h
Go outIllustrate that the steel plate that shuts out is thin partially, need reduce the pressure of hydraulic cylinder 10, make the vertical range between top working roll 5 and the bottom working roll 6 become big, make any velocity ratio v of steel plate thickening that shuts out up to the gateway steel plate
Go out/ v
Go intoEqual constant ratio h
Go into/ h
Go outTill, the steel plate thickness that shuts out so just is the preset thickness value; Otherwise, if less than h
Go into/ h
Go out, illustrate that the steel plate that shuts out is thick partially, need to increase the pressure of hydraulic cylinder 10, the vertical range between top working roll 5 and the bottom working roll 6 is diminished, make the steel plate attenuation that shuts out a bit, up to the velocity ratio v of gateway steel plate
Go out/ v
Go intoEqual constant ratio h
Go into/ h
Go outTill, the steel plate thickness that shuts out like this is required preset thickness value, steel plate 9 is rolling so back and forth, till the finished product of needs.Need not stop production even under the out of use situation of calibrator on one side, also can continue like this to produce, improve the production efficiency of enterprise, reduce production cost.
Otherwise, when right calibrator 7 can not use and under the good situation of left calibrator 8, steel plate 9 is from right reel 1 rolling being fine of reel 2 directions left, but reel 1 direction is rolling just not all right to the right from left reel 2 again, because right calibrator 7 can not use, so just can't know in the operation of rolling how much steel plate thickness that shuts out is, utilize the inventive method can solve this difficult problem: at first prepare 2 computers, the default rolling schedule parameter of input comprises that every time default thickness promptly obtains constant inlet/outlet thickness ratio h in computer therein
Go into/ h
Go out, and show above the computer display screen at another; Measure the speed v of inlet steel plate by left steering roller 12 (it is mounted with velocity sensor and is close to steel band and rotates together)
Go into, right turn roller 11 (it is mounted with velocity sensor and is close to steel band and rotates together) is measured the speed v of outlet steel plate
Go out, simultaneously with two ratio v
Go out/ v
Go intoBelow another computer display screen, show.The velocity ratio v of gateway steel plate on the view screen in the operation of rolling
Go out/ v
Go intoWhether equal constant ratio h
Go into/ h
Go outIf, greater than h
Go into/ h
Go out, illustrate that the steel plate that shuts out is thin partially, need reduce the pressure of hydraulic cylinder 10, make the vertical range between top working roll 5 and the bottom working roll 6 become big, make any velocity ratio v of steel plate thickening that shuts out up to the gateway steel plate
Go out/ v
Go intoEqual constant ratio h
Go into/ h
Go outTill, the thickness of the steel plate 9 that shuts out like this is required preset thickness values; Otherwise, if less than h
Go into/ h
Go out, illustrate that the steel plate that shuts out is thick partially, need to increase the pressure of hydraulic cylinder 10, the vertical range between top working roll 5 and the bottom working roll 6 is diminished, make any velocity ratio v of steel plate attenuation that shuts out up to the gateway steel plate
Go out/ v
Go intoEqual constant ratio h
Go into/ h
Go outTill, the steel plate thickness that shuts out like this is required preset thickness value, steel plate 9 is rolling so back and forth, till the finished product of needs.Just can continue to produce under the out of use situation of calibrator and need not to stop production having on one side like this, improve the production efficiency of enterprise, reduce production cost.
Claims (2)
1. the method for control steel plate thickness in the cold-rolled plate rolling process, it is characterized in that being equipped with two computers, and two computers is connected with the thickness control device of cold-rolling mill, the final rolling thickness value of the thickness of each rolling pass of steel plate and setting is input in wherein computer in the two computers, another computer then is used for showing the monolateral actual (real) thickness value of the steel plate of the cold-rolling mill operation of rolling, be positioned at the preset thickness ratio and the linear velocity ratio that is positioned at the steel plate of working roll both sides of the steel plate of working roll both sides, the ratio that equals steel plate muzzle velocity and steel plate entrance velocity with the ratio of steel plate inlet thickness that presets and the steel plate exit thickness that presets is a foundation, the value that shows steel plate muzzle velocity and the ratio of steel plate entrance velocity when computer is during greater than the value of the steel plate inlet thickness that presets and the ratio of the steel plate exit thickness that presets, then reduce the draught pressure of working roll, and the value that shows steel plate muzzle velocity and the ratio of steel plate entrance velocity when computer then increases the draught pressure of working roll during less than the value of the steel plate inlet thickness that presets and the ratio of the steel plate exit thickness that presets.
2. the method for control steel plate thickness in the cold-rolled plate rolling process according to claim 1, the monolateral actual (real) thickness value that it is characterized in that described steel plate are that steel plate is positioned at the inlet of described working roll or the one-tenth-value thickness 1/10 of outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102647458A CN101758085B (en) | 2009-12-23 | 2009-12-23 | Method for control steel plate thickness in cold-rolled plate rolling process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102647458A CN101758085B (en) | 2009-12-23 | 2009-12-23 | Method for control steel plate thickness in cold-rolled plate rolling process |
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| CN101758085A CN101758085A (en) | 2010-06-30 |
| CN101758085B true CN101758085B (en) | 2011-09-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102073327A (en) * | 2010-12-23 | 2011-05-25 | 南京林业大学 | Online monitoring and control system for continuous flat press plate blank thickness of artificial plate |
| CN102284507B (en) * | 2011-08-26 | 2013-04-17 | 秦皇岛首秦金属材料有限公司 | Rolling-mill plate control method for high-strength thin specification steel plate |
| CN104324947A (en) * | 2014-11-13 | 2015-02-04 | 广东华冠钢铁有限公司 | Roll plate thickness control method and roll plate thickness control system |
| CN109226276A (en) * | 2018-11-13 | 2019-01-18 | 中国重型机械研究院股份公司 | A kind of roll squeezer control method |
| CN111589875B (en) * | 2020-03-13 | 2022-10-11 | 科芃智能科技（苏州）有限公司 | Outlet thickness gauge fault diagnosis method and system in metal rolling process |
| CN113953331A (en) * | 2021-08-30 | 2022-01-21 | 江苏圣珀新材料科技有限公司 | Method for accurately controlling cold rolling thickness of steel plate |
| CN116060453B (en) * | 2023-04-06 | 2023-08-01 | 惠州亿纬动力电池有限公司 | Electrode slice thickness control method and control system |
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