CN102430591A - Loop control method of special thick steel at low temperature - Google Patents
Loop control method of special thick steel at low temperature Download PDFInfo
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- CN102430591A CN102430591A CN2011103174938A CN201110317493A CN102430591A CN 102430591 A CN102430591 A CN 102430591A CN 2011103174938 A CN2011103174938 A CN 2011103174938A CN 201110317493 A CN201110317493 A CN 201110317493A CN 102430591 A CN102430591 A CN 102430591A
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Abstract
A loop control method of special thick steel at low temperature is disclosed, and aims to overcome the loop oscillation among precision rolling frames and ensure normal production of hot rolling. The method comprises the steps of: determining the control parameters of the loop among the frames by a first level computer according to the following formula if the target temperature at the strip steel precision rolling outlet is lower than 830 DEG C and the thickness of the product is greater than 7mm: Yn=Yn-1+Kp*{[1+TA/TN]*deltaYn-deltaYn-1}, wherein Yn is the additional quantity m/s of the loop height to the frame speed at sampling moment n; TA is program scanning time; TN is time of integration; Kp is proportional coefficient; deltaYn is loop height difference mm at sampling movement n; and transmitting downward by a second level computer to distinguish the loop tension set values of steels so as to give the torque of the loop.
Description
Technical field
The present invention relates to a kind of autocontrol method of hot-continuous-rolling strip steel rolling line.
Background technology
Because the continuous hot-rolling mill finishing stand generally is made up of 7 rolling mills, between every adjacent two rolling mills a Hydraulic Looper is arranged all.Finishing mill control is by the I and II computer realization; It all is that the second-level model server calculates completion according to technological requirement before the band steel gets into milling train that each milling train setting speed, kink are set tension force; It all is to be accomplished by one-level computer PLC that the speed of each milling train and kink regulate that control waits, and wears at the band steel especially that the adjusting between the rolling mill speed and kink is to be realized by one-level computer PLC fully behind the band.Exploitation along with the special steel kind; When rolling low gentle and kind specification special steel; Because finishing stand speed very low (less than 2m/s) so and response characteristic is bad when low speed segment causes Hydraulic Looper to regulate with the rolling-mill housing speed regulation not match, cause that oscillatory occurences appears in the 0#-5# kink between finishing stand, can cause between frame directly steel scrap when serious; Have a strong impact on normally carrying out of rolling line production, bring very big economic loss to enterprise.
Summary of the invention
The present invention seeks to overcome the deficiency of above-mentioned prior art, a kind of low gentle and kind specification special steel looper control method that solves kink oscillatory occurences between finishing stand, guarantees the hot rolling ordinary production is provided.
The inventive method is:
(1) shut out a mouthful target temperature like the band aluminium and be lower than 830 ℃, finished product thickness is confirmed the control parameter of kink between each frame greater than 7mm through the one-level computer:
Y
n＝Y
n-1+K
p*{〔1+T
A/T
N〕*ΔY
n-ΔY
n-1}
In the formula: Y
nBe the kink cover amount of sampling instant n additional amount m/s, Y to this gantry speed
N-1Be the kink cover amount of sampling instant n-1 additional amount m/s to this gantry speed; T
AFor the program scanning time, be generally 2-10ms; T
NBe the time of integration, be generally 1000-5000ms; K
pBe proportionality coefficient, be generally 1-10; Δ Y
n: be the kink cover amount difference mm (given cover amount-actual cover amount) of sampling instant n; Δ Y
N-1Kink cover amount difference mm (given cover amount-actual cover amount) for sampling instant n-1.
One-level computer selection marker is accomplished corresponding judgment processing, according to the tracking signal completion logic chain function of band steel, controls requirement automatically thereby satisfy kink again.By the kink automatic control program of one-level computer realization when the rolling low gentle and kind specification special steel; Solved the technological control problem that kink is regulated; Delay regulate main frame speed with the minimizing proportionality coefficient time of integration through selecting to strengthen this gantry speed of kink cover amount adjusting; Make the adjusting of actual kink control coupling main frame speed, satisfied band steel control technological requirement.
(2) accomplish the kink tension force setting value of sending the differentiation steel grade down by second computer, realize that kink moment is given.Promptly according to process data and steel grade requirement, second computer through the model of tabling look-up obtain different kinks the tension force setting value and under give.Its concrete data correspondence is exemplified below table:
| Kink | Tension force setting value N/mm 2 |
| The 0# kink | 8 |
| The 1# kink | 10 |
| The 2# kink | 12 |
| The 3# kink | 16 |
| The 4# kink | 18 |
| The 5# kink | 20 |
The one-level computer judges whether into the rolling low special steel band steel of gentle and kind specification, if then drop into this kink control technology, up to having rolled according to the concrete data of rolled band steel; Otherwise use normal kink automatic control program.
The present invention is through the low gentle and kind specification special steel looper control technology of exploitation; Guaranteed the automatic control of Hydraulic Looper when rolling low gentle and kind specification special steel; Realized that when rolling low gentle and kind specification special steel the Hydraulic Looper between the hot-rolling finishing mill frame controls automatically; The problems such as Hydraulic Looper vibration between the hot-rolling finishing mill frame when rolling low gentle and kind specification special steel, have been solved; When rolling low gentle and kind specification special steel, solve hydraulic pressure kink stability between the hot-rolling finishing mill frame, reduced the cancel closedown time.
The specific embodiment
Implementation process of the present invention realizes in computer program fully automatically.Main process is: shut out a mouthful target temperature (being lower than 830 ℃) and finished product thickness (greater than 7mm) according to the band aluminium, accomplish corresponding judgment processing as one-level computer selection marker; Accomplish the kink tension force setting value of sending the differentiation steel grade down by second computer; Afterwards by the one-level computer according to band steel tracking signal with select the signal input to strengthen the time of integration and the given algorithm program that reduces proportionality coefficient that kink cover amount is regulated this gantry speed, guaranteeing to drop into low gentle and kind specification special steel looper automatic control program under band steel normal threading and the rolling prerequisite.Second computer has been set up the form model that all different steel and specification require kink tension force setting value according to actual debug data.When rolling, according to band steel steel grade and specification, second computer obtain through tabling look-up different kinks the tension force setting value and under give.
Be Q450NQR1 at rolling steel grade, when thickness is 7mm, second computer (HP server) through the tension force setting value that the form model checks in all kinks is: 0# kink: 8N/mm
21# kink: 12N/mm
22# kink: 15N/mm
23# kink: 18N/mm
24# kink: 20N/mm
25# kink: 22N/mm
2And send one-level computer (PLC controller) under before the band steel gets into finishing mill.The one-level computer is according to 810 ℃ of this strip finishing temperatures and be with the selection marker of steel finished product thickness 7mm as this control technology, the control that drops into corresponding milling train kink according to the follow load signal of each rolling mill simultaneously.Be 5ms the sweep time of this program, the 0# kink: the time of integration 2500ms, proportionality coefficient 3; The 1# kink: the time of integration 2650ms, proportionality coefficient 3; The 2# kink: the time of integration 2800ms, proportionality coefficient 3.5; The 3# kink: the time of integration 3000ms, proportionality coefficient 4; The 4# kink: the time of integration 3200ms, proportionality coefficient 4; The 5# kink: the time of integration 3500ms, proportionality coefficient 4.5.If there is not selection marker, then control according to normal kink control technology.
The parameter of its kink of different milling equipments control is also inequality, need according to the scene actual debug definite, like tension force setting value, the time of integration, proportionality coefficient etc.In a word, through implement should technology after between milling train kink control do not vibrate again, the production of having satisfied under the milling train low speed situation is normally carried out, effect is very good.
Claims (1)
1. one kind is hanged down gentle and kind specification special steel looper control method, it is characterized in that:
(1) shut out a mouthful target temperature like the band aluminium and be lower than 830 ℃, finished product thickness is confirmed the control parameter of kink between each frame greater than 7mm according to formula through the one-level computer:
Y
n＝Y
n-1+K
p*{〔1+T
A/T
N〕*ΔY
n-ΔY
n-1}
In the formula: Y
nBe the kink cover amount of sampling instant n additional amount m/s, Y to this gantry speed
N-1Be the kink cover amount of sampling instant n-1 additional amount m/s to this gantry speed; T
AFor the program scanning time, be generally 2-10ms; T
NBe the time of integration, be generally 1000-5000ms; K
pBe proportionality coefficient, be generally 1-10; Δ Y
nKink cover amount difference mm for sampling instant n; Δ Y
N-1Kink cover amount difference mm for sampling instant n-1;
(2) accomplish the kink tension force setting value of sending the differentiation steel grade down by second computer, realize that kink moment is given.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103174938A CN102430591A (en) | 2011-10-13 | 2011-10-13 | Loop control method of special thick steel at low temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103174938A CN102430591A (en) | 2011-10-13 | 2011-10-13 | Loop control method of special thick steel at low temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102430591A true CN102430591A (en) | 2012-05-02 |
Family
ID=45979144
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103174938A Pending CN102430591A (en) | 2011-10-13 | 2011-10-13 | Loop control method of special thick steel at low temperature |
Country Status (1)
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| CN (1) | CN102430591A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103272854A (en) * | 2013-05-24 | 2013-09-04 | 山西太钢不锈钢股份有限公司 | Idle hot continuous rolling fault rolling mill special steel loop control method |
| CN104148413A (en) * | 2014-08-18 | 2014-11-19 | 武汉钢铁(集团)公司 | Force moment adjuster coefficient tension roller control method |
| CN104209341A (en) * | 2014-09-03 | 2014-12-17 | 山西太钢不锈钢股份有限公司 | Additional given control method of hot continuous rolling silicon steel movable sleeve |
| CN104249082A (en) * | 2014-09-23 | 2014-12-31 | 山西太钢不锈钢股份有限公司 | Method for controlling loops of hot continuous rolling mills for special steel with thick specifications during technological idle setting |
| CN104259220A (en) * | 2014-09-26 | 2015-01-07 | 武汉钢铁(集团)公司 | Variable coefficient loop control method |
| CN104307884A (en) * | 2014-09-03 | 2015-01-28 | 山西太钢不锈钢股份有限公司 | Control method for loop falling of hot continuous rolling silicon-steel tail loop |
| CN104384200A (en) * | 2014-09-03 | 2015-03-04 | 山西太钢不锈钢股份有限公司 | Method for controlling speed of hot continuous rolling strip steel loop at low loop position |
| CN104858244A (en) * | 2015-06-09 | 2015-08-26 | 武汉钢铁(集团)公司 | Loop control method capable of ensuring tension stability of strip steel processing line |
| CN105499278A (en) * | 2016-01-04 | 2016-04-20 | 山西太钢不锈钢股份有限公司 | Steel loop control method for low-temperature wide material finishing mill frame of hot continuous rolling mill |
| CN106180212A (en) * | 2016-07-01 | 2016-12-07 | 江苏永钢集团有限公司 | A kind of Intelligent adjustment control method of looper control system and loop length |
| CN106734235A (en) * | 2016-12-14 | 2017-05-31 | 四川德胜集团钒钛有限公司 | A kind of kink covers control method high |
| CN109261728A (en) * | 2018-09-29 | 2019-01-25 | 安阳合力创科冶金新技术股份有限公司 | A kind of cold-pilgered bar milling train is double to drive synchronisation control means |
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| JP2000237812A (en) * | 1999-02-19 | 2000-09-05 | Toshiba Corp | Looper multivariable controller |
| CN1623700A (en) * | 2003-09-24 | 2005-06-08 | 攀枝花新钢钒股份有限公司热轧板厂 | Method and system for controlling looping of finishing mill |
| JP2006181582A (en) * | 2004-12-27 | 2006-07-13 | Jfe Steel Kk | Looper controller |
| KR100780424B1 (en) * | 2001-10-26 | 2007-11-28 | 주식회사 포스코 | Drive motor control apparatus of looper and its control method |
| CN101661298A (en) * | 2009-08-07 | 2010-03-03 | 山西太钢不锈钢股份有限公司 | Method for controlling micro-tension of hot strip rolling looper |
-
2011
- 2011-10-13 CN CN2011103174938A patent/CN102430591A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000237812A (en) * | 1999-02-19 | 2000-09-05 | Toshiba Corp | Looper multivariable controller |
| KR100780424B1 (en) * | 2001-10-26 | 2007-11-28 | 주식회사 포스코 | Drive motor control apparatus of looper and its control method |
| CN1623700A (en) * | 2003-09-24 | 2005-06-08 | 攀枝花新钢钒股份有限公司热轧板厂 | Method and system for controlling looping of finishing mill |
| JP2006181582A (en) * | 2004-12-27 | 2006-07-13 | Jfe Steel Kk | Looper controller |
| CN101661298A (en) * | 2009-08-07 | 2010-03-03 | 山西太钢不锈钢股份有限公司 | Method for controlling micro-tension of hot strip rolling looper |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103272854A (en) * | 2013-05-24 | 2013-09-04 | 山西太钢不锈钢股份有限公司 | Idle hot continuous rolling fault rolling mill special steel loop control method |
| CN104148413A (en) * | 2014-08-18 | 2014-11-19 | 武汉钢铁(集团)公司 | Force moment adjuster coefficient tension roller control method |
| CN104148413B (en) * | 2014-08-18 | 2017-03-15 | 武汉钢铁(集团)公司 | A kind of torque adjusting device coefficient jockey pulley control method |
| CN104209341B (en) * | 2014-09-03 | 2016-01-27 | 山西太钢不锈钢股份有限公司 | Hot continuous rolling silicon steel kink is added to locking control method |
| CN104307884B (en) * | 2014-09-03 | 2016-04-27 | 山西太钢不锈钢股份有限公司 | Hot continuous rolling silicon steel afterbody kink conforms to a conventional pattern control method |
| CN104307884A (en) * | 2014-09-03 | 2015-01-28 | 山西太钢不锈钢股份有限公司 | Control method for loop falling of hot continuous rolling silicon-steel tail loop |
| CN104384200A (en) * | 2014-09-03 | 2015-03-04 | 山西太钢不锈钢股份有限公司 | Method for controlling speed of hot continuous rolling strip steel loop at low loop position |
| CN104209341A (en) * | 2014-09-03 | 2014-12-17 | 山西太钢不锈钢股份有限公司 | Additional given control method of hot continuous rolling silicon steel movable sleeve |
| CN104249082A (en) * | 2014-09-23 | 2014-12-31 | 山西太钢不锈钢股份有限公司 | Method for controlling loops of hot continuous rolling mills for special steel with thick specifications during technological idle setting |
| CN104259220A (en) * | 2014-09-26 | 2015-01-07 | 武汉钢铁(集团)公司 | Variable coefficient loop control method |
| CN104858244A (en) * | 2015-06-09 | 2015-08-26 | 武汉钢铁(集团)公司 | Loop control method capable of ensuring tension stability of strip steel processing line |
| CN105499278A (en) * | 2016-01-04 | 2016-04-20 | 山西太钢不锈钢股份有限公司 | Steel loop control method for low-temperature wide material finishing mill frame of hot continuous rolling mill |
| CN106180212A (en) * | 2016-07-01 | 2016-12-07 | 江苏永钢集团有限公司 | A kind of Intelligent adjustment control method of looper control system and loop length |
| CN106180212B (en) * | 2016-07-01 | 2018-11-16 | 江苏永钢集团有限公司 | A kind of intelligent adjustment control method of looper control system and loop length |
| CN106734235A (en) * | 2016-12-14 | 2017-05-31 | 四川德胜集团钒钛有限公司 | A kind of kink covers control method high |
| CN106734235B (en) * | 2016-12-14 | 2019-07-05 | 四川德胜集团钒钛有限公司 | A kind of loop covers high control method |
| CN109261728A (en) * | 2018-09-29 | 2019-01-25 | 安阳合力创科冶金新技术股份有限公司 | A kind of cold-pilgered bar milling train is double to drive synchronisation control means |
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Application publication date: 20120502 |
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