CN103990652A - Movable sleeve control method for pipeline steel - Google Patents
Movable sleeve control method for pipeline steel Download PDFInfo
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- CN103990652A CN103990652A CN201410217317.0A CN201410217317A CN103990652A CN 103990652 A CN103990652 A CN 103990652A CN 201410217317 A CN201410217317 A CN 201410217317A CN 103990652 A CN103990652 A CN 103990652A
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Abstract
The invention provides a movable sleeve control method for pipeline steel, and belongs to the field of steel rolling. The method includes the steps that firstly, control parameters of movable sleeves between every two adjacent machine frames are determined through a first-stage computer and a second-stage computer according to the following formulas, wherein the target temperature of a strip steel finish rolling outlet is smaller than or equal to 810 DEG C, and the thickness of a finished product is larger than or equal to 8 mm; secondly, a table model of movable sleeve steel type tension coefficients is set up through the second-stage computer according to the requirements for process data and steel types, and steel type tension coefficients of different movable sleeves are obtained by looking up a table and sent out through the second-stage computer during rolling. By means of the movable sleeve control method, the hydraulic movable sleeves between the hot continuous rolling finish rolling machine frames are automatically controlled when the pipeline steel is rolled, the problem that the hydraulic movable sleeves between the hot continuous rolling finish rolling machine frames vibrate is solved when the pipeline steel is rolled, and abnormal shutdown time is shortened.
Description
Technical field
The present invention relates to a kind of autocontrol method of hot-continuous-rolling strip steel rolling line.
Background technology
Because continuous hot-rolling mill finishing stand is generally made up of 7 rolling mills, between every adjacent two rolling mills, there is a Hydraulic Looper.Finishing mill control is by I and II computer realization, each milling train steel grade coefficient of tension, kink setting tension force etc. are all that second-level model server has calculated according to technological requirement before band steel enters milling train, and the kink torque adjusting control of each milling train etc. is all to be completed by one-level computer PLC.Along with the exploitation of special steel kind, in the time of the thick specification pipe line steel of rolling, due to finishing stand speed very low (being less than 2.5m/s) so and in the time of low speed segment, response characteristic is bad causes Hydraulic Looper to regulate with rolling-mill housing speed adjusting not mate, cause 0#-5# kink between finishing stand to occur oscillatory occurences, when serious, can cause direct steel scrap between frame, have a strong impact on normally carrying out of rolling line production, bring very large economic loss to enterprise.
Summary of the invention
The present invention seeks to overcome the deficiency of above-mentioned prior art, provide and can solve kink oscillatory occurences between finishing stand, ensure the normal a kind of pipe line steel loop control method produced of hot rolling.
Technical scheme of the present invention is:
(1) band steel finish rolling export goal temperature is less than or equal to 810 DEG C, and finished product thickness is more than or equal to 8mm, determines the control parameter of kink between each frame by one-level computer:
S
n＝S
n-1+K*K
p*{〔1+T
A/T
N〕*△M
n-△M
n-1}
In formula, S
nfor the given output of servo valve (1.0-1.0) of the kink torque controller of sampling instant n; S
n-1for the given output of servo valve (1.0-1.0) of the kink torque controller of sampling instant n-1; T
afor the program scanning time, be generally 2-10ms; T N is the time of integration, is generally 1000-4000ms; K
pfor proportionality coefficient, be generally 10*10
-6-12*10
-6; K is the steel grade coefficient of tension sending under second-level model computer, is 0.1-1; △ M
nfor the kink torque difference (given moment-actual moment) of sampling instant n, Nm; △ M
n-1for the kink torque difference (given moment-actual moment) of sampling instant n-1, Nm.
One-level computer selection marker completes corresponding judgement processing, then according to the tracking signal completion logic chain function with steel, thereby meet automatic loop control requirement.
Automatic loop control program by one-level computer realization when the thick specification pipe line steel of rolling, solve the technology control problem of adjustment of loop, delay to regulate kink response speed by the time of integration and the coefficient of tension value minimizing proportionality coefficient that strengthen machine frame loop torque adjusting, make the adjusting of actual kink control coupling main frame speed, met band steel control technological requirement.
(2) complete down and send the loop tension coefficient of distinguishing steel grade by second computer, realize kink Torque Control.That is to say according to process data and steel grade requirement, second computer by the model of tabling look-up obtain different kinks the coefficient of tension and under give.
The coefficient of tension that thickness is more than or equal to the each kink of 8mm pipe line steel is: the coefficient of tension of 0# kink is: 0.6; The coefficient of tension of 1# kink is: 0.6; The coefficient of tension of 2# kink is: 0.55; The coefficient of tension of 3# kink is: 0.45; The coefficient of tension of 4# kink is: 0.4; The coefficient of tension of 5# kink is: 0.3.
One-level computer determines whether rolling pipeline steel strip steel according to the concrete data of rolled band steel, if it is drops into this Control Technology of Dancer, until roll; Otherwise use normal automatic loop control program.
The present invention, by the low gentle and kind specification pipe line steel Control Technology of Dancer of exploitation, has guaranteed the automatic control of Hydraulic Looper in the time of rolling pipe line steel.The Hydraulic Looper having realized between hot-rolling finishing mill frame in the time of rolling pipe line steel is controlled automatically; the problems such as the Hydraulic Looper vibration between hot-rolling finishing mill frame in the time of rolling pipe line steel, are solved; in the time of rolling pipe line steel, solve Hydraulic Looper stability between hot-rolling finishing mill frame, reduced the cancel closedown time.
Brief description of the drawings
Fig. 1 is logical flow chart of the present invention.
Detailed description of the invention
The invention process process automatically realizes completely in computer program.Main process is: according to band steel finish rolling export goal temperature (being less than or equal to 810 DEG C) and finished product thickness (being more than or equal to 8mm), complete corresponding judgement processing as one-level computer selection marker; Complete down and send the loop tension coefficient of distinguishing steel grade by second computer, drop into the time of integration of strengthening machine frame loop torque adjusting and the given algorithm program that reduces proportionality coefficient by one-level computer according to strip tracking signal and selection signal afterwards, under the prerequisite in guarantee with steel normal threading and rolling, drop into pipe line steel automatic loop control program.
Embodiment:
Be L360, thickness while being 8mm at rolling steel grade, second computer (HP server) is checked in the coefficient of tension of all kinks and is entered the front lower one-level computer (PLC controller) that send of finishing mill at band steel by Table Model.The control that one-level computer drops into corresponding milling train kink according to the follow load signal of each rolling mill according to 810 DEG C of this strip finishing temperatures with steel finished product thickness 8mm as the selection marker of this control technology simultaneously.Be 5ms the sweep time of this program, 0# kink: the time of integration 2500ms, the steel grade coefficient of tension 0.6; 1# kink: the time of integration 2650ms, the steel grade coefficient of tension 0.6; 2# kink: the time of integration 2800ms, the steel grade coefficient of tension 0.55; 3# kink: the time of integration 3000ms, the steel grade coefficient of tension 0.45; 4# kink: the time of integration 3200ms, the steel grade coefficient of tension 0.4; 5# kink: the time of integration 3500ms, the steel grade coefficient of tension 0.3.If without selection marker, control according to normal Control Technology of Dancer.
The present invention it may be noted that: the parameter of its kink control of different milling equipments is not identical yet, need to determine according to actual debugging the in scene, as the time of integration, tension force steel grade coefficient etc.In a word, do not vibrate by implementing after this technology kink control between milling train, the production having met in milling train low speed situation is normally carried out again, and effect is very good.
Claims (1)
1. a loop control method for pipe line steel, is characterized in that:
(1) band steel finish rolling export goal temperature is less than or equal to 810 DEG C, and finished product thickness is more than or equal to 8mm, carrys out according to the following formula to determine the control parameter of kink between each frame by I and II computer:
One-level kink torque controller algorithm is as follows:
S
n＝S
n-1+K*K
p*{〔1+T
A/T
N〕*△M
n-△M
n-1}
In formula, S
nfor the given output of servo valve of the kink torque controller of sampling instant n, for-1.0-1.0; S
n-1for the given output of servo valve of the kink torque controller of sampling instant n-1, for-1.0-1.0; T
afor the program scanning time, be generally 2-10ms; T
nfor the time of integration, be generally 1000-4000ms; K
pfor proportionality coefficient, be generally 10*10
-6-12*10
-6; K is the steel grade coefficient of tension sending under second computer, is 0.1-1; △ M
nfor the kink torque difference Nm of sampling instant n; The given moment of kink torque difference Nm=-actual moment; △ M
n-1for the kink torque difference Nm of sampling instant n-1.
(2) according to process data and steel grade requirement, second computer is set up the Table Model of the kink steel grade coefficient of tension; In the time of rolling, second computer obtain by tabling look-up different kinks the steel grade coefficient of tension and under give; The steel grade coefficient of tension that thickness is more than or equal to the different kinks of 8mm pipe line steel is respectively: the coefficient of tension of 0# kink is: 0.6; The coefficient of tension of 1# kink is: 0.6; The coefficient of tension of 2# kink is: 0.55; The coefficient of tension of 3# kink is: 0.45; The coefficient of tension of 4# kink is: 0.4; The coefficient of tension of 5# kink is: 0.3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410217317.0A CN103990652B (en) | 2014-05-19 | 2014-05-19 | A kind of loop control method of pipe line steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410217317.0A CN103990652B (en) | 2014-05-19 | 2014-05-19 | A kind of loop control method of pipe line steel |
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| Publication Number | Publication Date |
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| CN103990652A true CN103990652A (en) | 2014-08-20 |
| CN103990652B CN103990652B (en) | 2016-06-22 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104550260A (en) * | 2014-09-03 | 2015-04-29 | 山西太钢不锈钢股份有限公司 | Additional given value control method of hot-continuous-rolling thin-specification running sleeve and idle sleeve |
| 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 |
| CN109500098A (en) * | 2018-12-03 | 2019-03-22 | 山西太钢不锈钢股份有限公司 | A kind of method that loop vibrates between control hot-tandem unit |
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| JPH0910809A (en) * | 1995-06-22 | 1997-01-14 | Nkk Corp | Method for controlling continuous hot rolling mill |
| 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 |
| JP2012020313A (en) * | 2010-07-14 | 2012-02-02 | Sumitomo Light Metal Ind Ltd | Looper tension controlling method for rolling mill and controlling apparatus therefor |
| CN103240278A (en) * | 2013-05-21 | 2013-08-14 | 山西太钢不锈钢股份有限公司 | Variable-coefficient loop control method |
| CN103272856A (en) * | 2013-05-24 | 2013-09-04 | 山西太钢不锈钢股份有限公司 | Hot continuous rolling stainless steel strip steel tail portion loop control method |
-
2014
- 2014-05-19 CN CN201410217317.0A patent/CN103990652B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0910809A (en) * | 1995-06-22 | 1997-01-14 | Nkk Corp | Method for controlling continuous hot rolling mill |
| 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 |
| JP2012020313A (en) * | 2010-07-14 | 2012-02-02 | Sumitomo Light Metal Ind Ltd | Looper tension controlling method for rolling mill and controlling apparatus therefor |
| CN103240278A (en) * | 2013-05-21 | 2013-08-14 | 山西太钢不锈钢股份有限公司 | Variable-coefficient loop control method |
| CN103272856A (en) * | 2013-05-24 | 2013-09-04 | 山西太钢不锈钢股份有限公司 | Hot continuous rolling stainless steel strip steel tail portion loop control method |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104550260A (en) * | 2014-09-03 | 2015-04-29 | 山西太钢不锈钢股份有限公司 | Additional given value control method of hot-continuous-rolling thin-specification running sleeve and idle sleeve |
| 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 |
| CN104550260B (en) * | 2014-09-03 | 2016-06-29 | 山西太钢不锈钢股份有限公司 | Hot continuous rolling thin specification kink void set is added to locking 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 |
| CN109500098A (en) * | 2018-12-03 | 2019-03-22 | 山西太钢不锈钢股份有限公司 | A kind of method that loop vibrates between control hot-tandem unit |
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