CN104815852B - Hot continuous rolling section cooling strip steel head does not cool down the control method of length - Google Patents
Hot continuous rolling section cooling strip steel head does not cool down the control method of length Download PDFInfo
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- CN104815852B CN104815852B CN201510258485.9A CN201510258485A CN104815852B CN 104815852 B CN104815852 B CN 104815852B CN 201510258485 A CN201510258485 A CN 201510258485A CN 104815852 B CN104815852 B CN 104815852B
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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
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
- B21B37/76—Cooling control on the run-out table
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
Hot continuous rolling section cooling strip steel head does not cool down the control method of length, belong to metallurgical industry and produce automation field, i.e. when strip steel enters mm finishing mill unit F7, pulse generator starts action, second computer calculates delay time by time delay computing formula, after strip steel enters section cooling district vavle shelf, primary computer controls the opening and closing operations of vavle shelf water injection valve according to the water spray instruction of second computer, it is achieved strip steel head do not cool down control.The present invention makes full use of the advance of Computer Control Technology and the feature of operability, laminar flow cooling control uses, save investment, improve head and do not cool down the stability that length controls, the loss rate of cutting of strip steel head substantially reduces, avoid because of the low problem causing coiling machine heap steel of strip steel head temperature, achieve good benefit.
Description
Technical field
The invention belongs to metallurgical industry and produce automation field, hot-continuous-rolling strip steel section cooling head does not cool down length
Control technology.
Background technology
2250 production line laminar flow cooling zone steel heads do not cool down length and control to be not sufficiently stable.When the coldest length is longer, band
Steel head performance is unable to reach Mechanical course requirement, and finished product resection is big, and production cost is high.When the coldest length is the shortest, even
When head cools down completely, easily causing coiling machine heap steel, thus affect production efficiency, Business Economic Benefit suffers a loss.So,
Section cooling head does not cool down the problem that the control technology of length becomes our primary study.
Summary of the invention
The invention aims to make TEMPERATURE FOR HOT STRIP LAMINAR cooling head not cool down length and control stable, and control length exists
Between 1 ~ 1.5 meter, both having ensured that strip steel head cut damage amount not quite, can meet again coiling machine can normally batch simultaneously, does not haves
Steel scrap fault.
Hot continuous rolling section cooling strip steel head does not cool down the control method of length, i.e. when strip steel enters mm finishing mill unit F7,
Pulse generator starts action, and second computer calculates delay time by time delay computing formula, and strip steel enters section cooling
After district's vavle shelf, primary computer controls the opening and closing operations of vavle shelf water injection valve according to the water spray instruction of second computer, it is achieved strip steel
Head do not cool down control；
Time delay computing formula: delaytime=(int) (f_NSPLeng*1000) % (int) (f_SectionLeng
* 1000)/1000/f_Speed+ delaytimecrr；
Wherein: delaytime is delay time (unit is the second)；F_NSPLeng is head the coldest length settings (unit
It is rice)；F_SectionLeng is the length following the tracks of section, and thin gauge strip is 4.56 meters, and heavy gauge steel strip is 2.28 meters；f_
Speed is strip steel actual speed (unit: meter per second)；Delaytimecrr is delay time correction value (unit: second)；
It is 1 ~ 1.5 meter that head does not cool down length settings；Delay time correction value is 0.2 ~ 0.5.
The present invention solves the TEMPERATURE FOR HOT STRIP LAMINAR cooling the coldest length of head and controls unstable problem.
Taiyuan Iron and Steel Co. hot continuous rolling factory section cooling uses this invention, and effect is as follows:
(1) the coldest length of strip steel head controls more stable.
(2) the steel scrap accident of coiling machine heap steel is avoided.
(3) strip steel head is cut loss rate and is decreased obviously, annual about 2,000,000 yuan of the direct economic benefit of acquirement.
Detailed description of the invention
Following table is the coldest length settings f_NSPLeng (m) of head and the time delay correction set-point of part steel grade
Delaytimeccr (s):
(1) by second computer complete the coldest length of head setup algorithm and under send work.
As shown in table 1, head does not cool down length and is achieved by changing into delay time, the calculating process of delay time
As follows:
Delaytime=((int) (f_NSPLeng*1000)) % ((int) (f_SectionLeng * 1000))/
1000/f_Speed+ delaytimecrr (formula 1)
Delaytime is delay time, and f_NSPLeng is the coldest length settings of head, and f_SectionLeng is for following the tracks of
The length of section, thin gauge strip is 4.56 meters, and heavy gauge steel strip is 2.28 meters, and f_Speed is strip steel actual speed,
Delaytimecrr is delay time correction value.
Due in mm finishing mill unit, strip steel be easily generated shake, be obstructed, the unusual fluctuations such as temperature so that the reality of strip steel
There is fluctuation in speed, and the velocity perturbation situation that steel grade specification difference produces is the most different, and delaytime is directly made by velocity perturbation
Become impact, therefore use delaytimecrr that delaytime is modified.Delaytimecrr time delay correction value such as institute in table
Show.
In the middle of program, if delaytime > 0, perform to send work under the time delay of Time::Wait (delaytime).
(2), after second computer performs time delay, primary computer commands the opening operation of on-the-spot valve according to the instruction received,
Thus ensure strip steel head do not cool down control.
Claims (1)
1. hot continuous rolling section cooling strip steel head does not cool down the control method of length, i.e. when strip steel enters mm finishing mill unit F7, and arteries and veins
Rushing generator and start action, second computer calculates delay time by time delay computing formula, and strip steel enters section cooling district
After vavle shelf, primary computer controls the opening and closing operations of vavle shelf water injection valve according to the water spray instruction of second computer, it is achieved band steel toe
Portion does not cools down control；
Time delay computing formula: delaytime=((int) (f_NSPLeng*1000)) % ((int) (f_SectionLeng
* 1000))/1000/f_Speed+ delaytimecrr；
Wherein: delaytime is delay time, unit is the second；F_NSPLeng is the coldest length settings of head, and unit is
Rice；F_SectionLeng is the length following the tracks of section, and unit is rice；Thin gauge strip follows the tracks of a length of 4.56 meters of section, think gauge
A length of 2.28 meters of strip tracking section；F_Speed is strip steel actual speed, and unit is meter per second；Delaytimecrr is time delay
Time complexity curve value, unit is rice；
It is 1 ~ 1.5 meter that head does not cool down length settings；Delay time correction value is 0.2 ~ 0.5 meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510258485.9A CN104815852B (en) | 2015-05-20 | 2015-05-20 | Hot continuous rolling section cooling strip steel head does not cool down the control method of length |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510258485.9A CN104815852B (en) | 2015-05-20 | 2015-05-20 | Hot continuous rolling section cooling strip steel head does not cool down the control method of length |
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| Publication Number | Publication Date |
|---|---|
| CN104815852A CN104815852A (en) | 2015-08-05 |
| CN104815852B true CN104815852B (en) | 2016-08-24 |
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|---|---|---|---|
| CN201510258485.9A Active CN104815852B (en) | 2015-05-20 | 2015-05-20 | Hot continuous rolling section cooling strip steel head does not cool down the control method of length |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106391727A (en) * | 2016-06-28 | 2017-02-15 | 东北大学 | Head no-cooling control method for hot rolled strip steel in ultra-rapid cooling area |
| CN111530936B (en) * | 2020-03-31 | 2021-02-19 | 燕山大学 | Sectional cooling control method and system based on D number theory |
| CN112756404B (en) * | 2020-11-23 | 2022-04-01 | 阳春新钢铁有限责任公司 | Precise and quantitative automatic control system and control method for non-cold section of production head of high-speed wire rod |
| CN114618894B (en) * | 2022-03-23 | 2023-07-21 | 马鞍山钢铁股份有限公司 | Layer cooling control method for thin strip steel coiling anti-flying pile steel |
| CN115090685A (en) * | 2022-06-06 | 2022-09-23 | 首钢京唐钢铁联合有限责任公司 | Strip steel control method, device, equipment and medium |
Citations (5)
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|---|---|---|---|---|
| CN1500573A (en) * | 2002-11-13 | 2004-06-02 | 鞍钢集团新钢铁有限责任公司 | Method for stream cooling semi finished metal of hotstrip |
| CN101502849A (en) * | 2009-03-19 | 2009-08-12 | 东北大学 | Medium plate laminar cooling chain edge part shading device control method |
| CN101745551A (en) * | 2008-12-11 | 2010-06-23 | 宝山钢铁股份有限公司 | Free cooling method of hot rolling band steel |
| CN102380514A (en) * | 2011-11-13 | 2012-03-21 | 首钢总公司 | Method for promoting uniformity of cooling-control temperature of hot-rolled steel sheet |
| JP5181137B2 (en) * | 2011-07-21 | 2013-04-10 | 新日鐵住金株式会社 | Cooling device, hot-rolled steel plate manufacturing apparatus, and hot-rolled steel plate manufacturing method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6698266B2 (en) * | 2001-03-20 | 2004-03-02 | General Electric Company | System and method for optimizing mill cuts |
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2015
- 2015-05-20 CN CN201510258485.9A patent/CN104815852B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1500573A (en) * | 2002-11-13 | 2004-06-02 | 鞍钢集团新钢铁有限责任公司 | Method for stream cooling semi finished metal of hotstrip |
| CN101745551A (en) * | 2008-12-11 | 2010-06-23 | 宝山钢铁股份有限公司 | Free cooling method of hot rolling band steel |
| CN101502849A (en) * | 2009-03-19 | 2009-08-12 | 东北大学 | Medium plate laminar cooling chain edge part shading device control method |
| JP5181137B2 (en) * | 2011-07-21 | 2013-04-10 | 新日鐵住金株式会社 | Cooling device, hot-rolled steel plate manufacturing apparatus, and hot-rolled steel plate manufacturing method |
| CN102380514A (en) * | 2011-11-13 | 2012-03-21 | 首钢总公司 | Method for promoting uniformity of cooling-control temperature of hot-rolled steel sheet |
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| CN104815852A (en) | 2015-08-05 |
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