CN104138911B - A kind of method of cut deal intermediate blank rapid water cooling temperature control - Google Patents
A kind of method of cut deal intermediate blank rapid water cooling temperature control Download PDFInfo
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- CN104138911B CN104138911B CN201410229619.XA CN201410229619A CN104138911B CN 104138911 B CN104138911 B CN 104138911B CN 201410229619 A CN201410229619 A CN 201410229619A CN 104138911 B CN104138911 B CN 104138911B
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Abstract
The method of a kind of cut deal intermediate blank rapid water cooling temperature control of the present invention, the device that the method relates to includes the controlled rolling and controlled cooling system of milling train, it is characterized in that in cooling controlling and rolling controlling process, after first time rolling terminates, intermediate blank enters section cooling district and carries out cooling control；After water-cooled terminates, intermediate blank is sent to from section cooling district and treats that warm area waits；When intermediate blank surface temperature and heart portion temperature are recovered to roll even into second stage.Water-cooled temperature control technique can be greatly reduced time of staying temperature compared with air cooling temperature control, learns according to experiment, adopts the water-cooled temperature control time to only have 2-3 minute, and air cooling is then up to 7-8 minute, and any cool time thick was up to more than 10 minutes.This technology is greatly enhanced production efficiency, has high economic results in society.
Description
Technical field
The present invention relates to mathematical model application on rolling mill for hot rolled planks and strips process control computer, the method especially relating to the quick water-cooled temperature control of a kind of cut deal intermediate blank.
Background technology
In order to adapt to the keen competition in market, Develop new product, improving product quality is the necessary ways that numerous Heavy Plate Production enterprise improves the competitiveness, and it controls the technique that the cooling controlling and rolling controlling process in production technology is its key, and it directly affects production cost, efficiency and quality.Technological difficulties in cooling controlling and rolling controlling process are control refrigeration techniques.Existing Medium Steel Plate Controlled roll process mainly adopts the mode of air cooling to cool down in the control cold stage, when intermediate blank is thicker, air cooling time is oversize, general cool time at 7-8 minute, any cool time thick up to more than 10 minutes, and the so long temperature control time serious have impact on rhythm of production and yield.The existing control cold stage all adopts Finite Element Method model to be controlled, and it is mainly used in cooling after control is pricked, and refrigerating mode is section cooling, but this model cannot be used for the control of intermediate blank.And the steel plate more than 80% of the market demand needs to be controlled rolling, therefore the different types of cooling and control cooling method must be taked to reduce the temperature control time, how to the quick temperature control of intermediate blank, being combined with controlled rolling process, reduce the temperature difference rolling rear steel plate is one of numerous steel mill difficult problem of always seeking to solve as far as possible.
Summary of the invention
In view of the defect that above-mentioned prior art exists, the purpose of the present invention is to propose to a kind of method making the quick water-cooled temperature control of intermediate blank that cooling effectiveness is fast, efficiency is high.
For solving the problems referred to above, the technical solution used in the present invention is the method for the quick water-cooled temperature control of a kind of cut deal intermediate blank, the device that the method relates to includes the controlled rolling and controlled cooling system of milling train, it is characterized in that in cooling controlling and rolling controlling process, after first stage rolling terminates, intermediate blank enters section cooling district and carries out cooling control；After water-cooled terminates, intermediate blank is sent to from section cooling district and treats that warm area waits；When intermediate blank surface temperature and heart portion temperature are recovered to roll even into second stage.
The further technical scheme that the present invention adopts is:
Further, the controlled rolling and controlled cooling system of described milling train includes milling train first class control system, milling train second control system, and the model of described milling train second control system includes intermediate blank data model, section cooling model；Described intermediate blank data model is that intermediate blank realizes segmentation detection, when the controlled rolling plate first stage finally stings steel together, the observed temperature of each for intermediate blank Discrete control point, thickness, speed and intermediate blank cold target control temperature eventually is sent to section cooling model；Described section cooling model receives intermediate blank data model and sends the intermediate blank related data of coming simultaneously, and intermediate blank is carried out segmentation tracking, the water-cooled target temperature of each section of intermediate blank is calculated setting respectively, triggers the setting data of laminar flow cooling jig computation layer adfluxion pipe simultaneously.
Further, described workpiece thickness data are for divide seven layers to carry out finite difference formulations setting in a thickness direction.
Further, it is that section cooling model calculates the collector group number that water-cooled is opened, the mode opening collector and water-cooled rear surface thermal recovery time to target temperature needs that described triggering laminar flow cooling jig calculates laminar flow collector setting data, automatically calculated reserved 1-2 minute by section cooling model simultaneously, making intermediate blank surface temperature return to and heart portion temperature close, temperature difference is less than 20 DEG C.
Further, described is that the intermediate blank surface temperature surveyed no longer raises when intermediate blank surface temperature is uniform with the recovery of heart portion temperature.
Further, the spacing between described intermediate blank Discrete control point is 1 to 2 meter.
Further, the spacing between described intermediate blank Discrete control point is 1.5 meters.
The invention has the beneficial effects as follows: water-cooled temperature control technique can be greatly reduced time of staying temperature compared with air cooling temperature control, learns according to experiment, adopt the water-cooled temperature control time to only have 2-3 minute, air cooling is then up to 7-8 minute, and any cool time thick was up to more than 10 minutes.This technology is greatly enhanced production efficiency, has high economic results in society.
Accompanying drawing explanation
Fig. 1 is that intermediate blank is at machine front roller-way schematic diagram；
Fig. 2 is that intermediate blank enters laminar region schematic diagram.
Detailed description of the invention
The method of the quick water-cooled temperature control of the present embodiment a kind of cut deal intermediate blank: the device that the method relates to includes the controlled rolling and controlled cooling system of milling train, controlled rolling and controlled cooling system includes milling train first class control system, milling train second control system, milling train second control system model includes intermediate blank data model, section cooling model；Intermediate blank data model is that intermediate blank realizes segmentation detection, when the controlled rolling plate first stage finally stings steel together, the observed temperature of each for intermediate blank Discrete control point, thickness, speed and intermediate blank cold target control temperature eventually is sent to section cooling model；Workpiece thickness data are for divide seven layers to carry out finite difference formulations setting in a thickness direction.Section cooling model receives intermediate blank data model and sends the intermediate blank related data of coming simultaneously, and intermediate blank carries out segmentation tracking, and the spacing between intermediate blank Discrete control point is 1.5 meters.Each section is calculated respectively setting data, triggers laminar flow cooling jig and calculate laminar flow collector setting data.Laminar flow collector setting data is that section cooling model calculates the collector group number that water-cooled is opened, the mode opening collector and water-cooled rear surface thermal recovery time to target temperature needs, automatically calculated reserved 1-2 minute by section cooling model simultaneously, making intermediate blank surface temperature return to and heart portion temperature close, temperature difference is less than 20 DEG C.
Amendment one-level control software design, makes intermediate blank after rolling terminates for the first time, enters section cooling district and carries out cooling control；After water-cooled terminates, intermediate blank is sent to from section cooling district and treats that warm area waits；When intermediate blank surface temperature and heart portion temperature are recovered to roll even into second stage.
X65 pipe line steel to produce 15mm below, if Fig. 1 is to shown in 2: by the steel billet after heating furnace 1, dephosphorizing machine 2, temperature is 1200 DEG C, roller-way send into milling train 3, be rolled down to 4 times of target thickness, and namely 60mm thickness terminates roughing.When roughing that is first is rolled and finally stings steel together, the parameters such as the temperature of intermediate blank, thickness, speed, steel grade, rolling mode, intermediate blank target final cooling temperature are sent to section cooling model by the intermediate blank data model of milling train second control system, section cooling model will calculate intermediate blank water-cooled target temperature automatically according to different parameters such as steel grade, rolling mode, thickness, be generally higher 30-80 DEG C than intermediate blank target final cooling temperature.
Trigger laminar flow cooling jig simultaneously and calculate section cooling district 4 collector unlatching group number and opening ways.When laminar flow entrance pyrometer detects steel plate head, cooling jig will start segmentation following function, and every section of segment length is 1.5 meters, and each section of steel plate entering section cooling district 4 adopts real time data calculate collector opening ways and group number respectively.And each section of steel plate in section cooling district is carried out real-time tracking.After water-cooled terminates, steel plate has roller-way to deliver to the swing cooling of machine front roller-way, when surface temperature goes back up to slightly above 930 DEG C, temperature starts to top out, then begin to decline, after surface temperature drops to 930 degree, intermediate blank is delivered to milling train and is started the rolling in finish rolling stage by roller-way, until being rolled down to target thickness 15mm.
By the change of software, model achieves the feedforward of model, feedback closed loop controls, and realizes the segmentation to steel plate intermediate blank simultaneously and follows the tracks of, and every 1.5 meters is one section along its length, calculates setting data respectively to each section.Steel billet temperature is divided in a thickness direction seven layers and carries out finite difference formulations, thus ensureing the precision of temperature computation.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to replacement or the technical scheme of equivalent transformation formation, all fall within the protection domain of application claims.
Claims (6)
1. a method for cut deal intermediate blank rapid water cooling temperature control, the device that the method relates to includes the controlled rolling and controlled cooling system of milling train, and in cooling controlling and rolling controlling process, after first stage rolling terminates, intermediate blank enters section cooling district and carries out cooling control；After water-cooled terminates, intermediate blank is sent to from section cooling district and treats that warm area waits；When intermediate blank surface temperature and heart portion temperature are recovered to roll even into second stage；It is characterized in that: the controlled rolling and controlled cooling system of described milling train includes milling train first class control system, milling train second control system, and the model of described milling train second control system includes intermediate blank data model, section cooling model；Described intermediate blank data model is that intermediate blank realizes segmentation detection, when the controlled rolling plate first stage finally stings steel together, the observed temperature of each for intermediate blank Discrete control point, thickness, speed and intermediate blank cold target control temperature eventually is sent to section cooling model；Described section cooling model receives intermediate blank data model and sends the intermediate blank related data of coming simultaneously, and intermediate blank is carried out segmentation tracking, the water-cooled target temperature of each section of intermediate blank is calculated setting respectively, triggers laminar flow cooling jig simultaneously and calculate laminar flow collector setting data.
2. the method for the quick water-cooled temperature control of a kind of cut deal intermediate blank according to claim 1, it is characterised in that: the thickness data of described intermediate blank is for divide seven layers to carry out finite difference formulations setting in a thickness direction.
3. the method for the quick water-cooled temperature control of a kind of cut deal intermediate blank according to claim 2, it is characterized in that: it is that section cooling model calculates the collector group number that water-cooled is opened, the mode opening collector and water-cooled rear surface thermal recovery time to target temperature needs that described triggering laminar flow cooling jig calculates laminar flow collector setting data, automatically calculated reserved 1-2 minute by section cooling model simultaneously, making intermediate blank surface temperature return to and heart portion temperature close, temperature difference is less than 20 DEG C.
4. the method for the quick water-cooled temperature control of a kind of cut deal intermediate blank according to claim 3, it is characterised in that: described is that the intermediate blank surface temperature surveyed no longer raises when intermediate blank surface temperature is uniform with the recovery of heart portion temperature.
5. the method for the quick water-cooled temperature control of a kind of cut deal intermediate blank according to claim 4, it is characterised in that: the spacing between the Discrete control point of described intermediate blank is 1 to 2 meter.
6. the method for the quick water-cooled temperature control of a kind of cut deal intermediate blank according to claim 5, it is characterised in that: the spacing between the Discrete control point of described intermediate blank is 1.5 meters.
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| CN105834214B (en) * | 2015-01-16 | 2017-09-22 | 宝山钢铁股份有限公司 | Produce the temperature-controlled rolling equipment of metal plate coils |
| CN109112392B (en) * | 2018-07-17 | 2020-11-20 | 张家港宏昌钢板有限公司 | TMCP type high strength, toughness and high fatigue performance weathering bridge steel plate and preparation method |
| CN111069307B (en) * | 2019-12-09 | 2021-08-20 | 北京科技大学 | An intermediate cooling method for medium and thick plates suitable for multiple processes |
| CN115069785B (en) * | 2021-03-15 | 2024-07-12 | 宝山钢铁股份有限公司 | Control method for batch collection and waiting temperature of intermediate blanks |
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| JPH0857520A (en) * | 1994-08-24 | 1996-03-05 | Nippon Steel Corp | Rolling method for hot steel plate |
| CN1410179A (en) * | 2002-11-14 | 2003-04-16 | 南京钢铁股份有限公司 | Medium and thick plate controlled milling technology and its lifting mechanism |
| 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 |
| CN101381854A (en) * | 2008-10-30 | 2009-03-11 | 北京科技大学 | Production method of bainitic high-strength steel plate with low carbon and high niobium content |
| CN101829688A (en) * | 2010-05-28 | 2010-09-15 | 北京科技大学 | Cooling method of heavy and medium plate controlled rolling intermediate blank |
| CN202779191U (en) * | 2012-08-29 | 2013-03-13 | 江苏博际喷雾系统有限公司 | Middle billet cooling system for steel billets |
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2014
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0857520A (en) * | 1994-08-24 | 1996-03-05 | Nippon Steel Corp | Rolling method for hot steel plate |
| 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 |
| CN1410179A (en) * | 2002-11-14 | 2003-04-16 | 南京钢铁股份有限公司 | Medium and thick plate controlled milling technology and its lifting mechanism |
| CN101381854A (en) * | 2008-10-30 | 2009-03-11 | 北京科技大学 | Production method of bainitic high-strength steel plate with low carbon and high niobium content |
| CN101829688A (en) * | 2010-05-28 | 2010-09-15 | 北京科技大学 | Cooling method of heavy and medium plate controlled rolling intermediate blank |
| CN202779191U (en) * | 2012-08-29 | 2013-03-13 | 江苏博际喷雾系统有限公司 | Middle billet cooling system for steel billets |
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