CN102145348A - Sheet shape control technology used in hot strip rolling of super-wide sheets - Google Patents
Sheet shape control technology used in hot strip rolling of super-wide sheets Download PDFInfo
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- CN102145348A CN102145348A CN2010106153426A CN201010615342A CN102145348A CN 102145348 A CN102145348 A CN 102145348A CN 2010106153426 A CN2010106153426 A CN 2010106153426A CN 201010615342 A CN201010615342 A CN 201010615342A CN 102145348 A CN102145348 A CN 102145348A
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Abstract
The invention discloses the technical field of hot strip rolling, in particular to a sheet shape control technology used in hot strip rolling of super-wide sheets. The core technology mainly comprises the steps of AVC (Asia Vital Components) application, AVC roller type curve design, formulation and implementation of a sheet shape control strategy, accurate estimation and calculation of precision of rolling mills, roll wear and thermal expansion, optimization of a model control system, and the like. In the sheet shape control technology, the front four rolling mills of a continuous hot rolling and finishing mill group adopt the AVC rollers, the following three rolling mills adopt the conventional rollers, and the axial drifting mechanism of working rollers and the model control function are optimized, namely, the front three racks are respectively provided with a proportion crown for maintaining good sheet shapes, and meanwhile, the proportion crowns of the racks behind are changed slightly or not changed, and the index of flatness of strip steel at a finishing mill outlet can be kept good.
Description
Technical field
The present invention relates to the hot continuous rolling technical field, especially relate to plate shape control technology in the super wide thin plate hot continuous rolling production process.
Background technology
The existing greatly development of output that China's hot-continuous-rolling strip steel is produced and technology, but in development, also have certain problem: be that construction project is too much on the one hand, product is far longer than social demand, and this is the greatest problem that exists at present.Some enterprise's distances are very near, and the construction technique level is similar simultaneously, output is similar, the similar unit of product.And market and demand are lacked necessary investigation, and product does not have characteristic, builds blindly, is on a sticky wicket probably in the competition in future.
On the other hand, in the hot continuous rolling production process, the main difficulty of thin slab product production is that strip shape quality is difficult to control, and there is bigger plate shape problem in the thin slab product of producing, is difficult to satisfy user's instructions for use.
The common roll forming of the convexity concave system that is that the hot continuous rolling production line mm finishing mill unit is used, because user's order specification and variety variations are bigger, the common roll forming of single use convexity concave adds the needs that the roll shifting control system is difficult to satisfy rolling scaduled layout, need to be equipped with the needs that the conventional roll forming of 3～4 covers satisfies different rolling units generally speaking, simultaneously, the common roll forming of the convexity concave control system that adds roll shifting also is difficult to satisfy the requirement that improves the thin slab product strip shape quality.
Summary of the invention
For satisfying the needs of thin dimension board shape control quality, improve adaptability to different size and kind, the invention provides a kind of new hot continuous rolling technology, plate shape control technology during promptly super wide thin plate hot continuous rolling is produced.
The present invention is by the following technical solutions:
Described technical scheme comprises following technology contents,
1, roll adopts the AVC roll;
2, accurate Calculation roll wear and thermal expansion coefficients certificate, utilize roll grinder and roll shape measuring instrument respectively to before reaching the standard grade and the roll after rolling off the production line carry out roll shape and measure, the size of the horizontal each point of roll before record is reached the standard grade respectively, the size and the temperature of the horizontal each point of roll and the size of the horizontal each point of cooling back roll that rolls off the production line when rolling off the production line, thereby obtain through behind a rolling unit rolling the actual wear of roll and thermal expansion situation.Data in then the data that obtained and model specification being calculated are carried out analytical calculation, optimize the AVC roll;
3, the optimization of plate shape control strategy, according to different rolling units, quality requirement in conjunction with product, the distance of roll play between the scope of design roll axial float and adjacent two block plates, make roll wear more even on the roll length direction, special circumstances when changing steel grade and specifications vary suitably strengthen roll play distance, to guarantee to satisfy the needs of plate crown control;
4, the functional module relevant with the control of plate shape is optimized formulated in combination, mainly comprises:
A, metal lateral flow coefficient has been carried out the optimum organization configuration, revise in the model configuration file coefficient of correspondence of the ability that laterally flows to about rolled piece flakiness ratio and metal, the capacity factor that laterally flows to flakiness ratio when big weakens, limited model in the upstream frame as much as possible to the transition of target proportion convexity, keeping glacing flatness for the downstream frame creates conditions, guaranteed that metal flow equates on the band steel cross section, avoided producing shape wave;
B, to revising critical warping coefficient optimum organization configuration, change the way that in the original system all steel grades is adopted same group of band steel change of shape coefficient, combined process is analyzed, in model, different steel grades is adopted each self-corresponding band steel change of shape coefficient, make the critical warpage calculating of band steel of model more reasonable, simultaneously, for the ratio convexity that makes the downstream frame identical as far as possible, the people makes the band steel change of shape coefficient curve of each steel grade more steep, strengthen model and finish transition from the ratio convexity of intermediate blank to the target proportion convexity of finished product in preceding several frames, the flatness control of better keeping the band steel for the downstream frame provides condition;
C, to optimizing model self-learning optimization combination configuration, the adaptive learning relevant with steel-plate shape is divided into two classes in the model system, a class is the adaptive learning relevant with the steel plate characteristic, is called long-term adaptive learning; Another kind of is the self study relevant with the milling train current state, be called the short-term adaptive learning, the parameter of using these two kinds of adaptive learnings is simultaneously controlled during to steel plate rolling, steel grade takes place in the operation of rolling, when specification is jumped, can access desirable plate shape even make.
The effect that the present invention is useful
The present invention's four rolling mills before super wide thin plate hot-rolling finishing mill group adopt the AVC roll shape, conventional roll shape is adopted in three of backs, and working roll axial float system and model control function is optimized, can form holding plate shape good proportion convexity in first three frame, while can make the ratio convexity of back frame change very little or not change, and can guarantee that the glacing flatness index of finish rolling outlet band steel is good.
Description of drawings
Fig. 1 is an optimal design AVC roll shape schematic diagram of the present invention.
Fig. 2 is optimized schematic diagram for the relevant functional module of plate shape control of the present invention.
The specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing.
AVC roll shape system is very crucial to the production of hot continuous rolling.Optimal design AVC roll shape realizes the work roll crown continuous variable; The design of AVC roller curve, its roller curve is S-type, and (as shown in Figure 1, ordinate is the roller rate of change, abscissa is a temperature), up-down rollers is inverted 180 ° of layouts mutually, moves by the rightabout vertically symmetry of two rollers, obtains the different convexity roll gap shapes of continually varying.
There are two characteristics in AVC roll shape system:
The one, adaptive capacity is strong, and rolling scaduled layout is flexible, can adopt same set of roll shape to satisfy the rolling unit of different size, different cultivars mixing, reduces the standby quantity of online roll;
The 2nd, the convexity control ability is strong, can make full use of these characteristics, strip profile is controlled in the reasonable range in the leading portion frame of mm finishing mill unit, creates good condition for the mm finishing mill unit afer bay carries out flatness control.Can effectively improve the unmanageable technical barrier of strip shape quality in the thin specification production process.
When in same rolling unit, producing two kinds or above intensity difference apart from bigger product, because the intensity difference of two kinds of products is apart from very big, thereby make the intermediate blank convexity gap of roughing output also bigger, if mm finishing mill unit adopts whole conventional roll shapes, be difficult to satisfy simultaneously different demands, thereby make strip shape quality be difficult to be guaranteed big convexity and little convexity intermediate blank.
As shown in Figure 2, and when adopting the AVC roll shape, by accurate Calculation roll wear and thermal expansion coefficients certificate, utilize roll grinder and roll shape measuring instrument respectively to before reaching the standard grade and the roll after rolling off the production line carry out roll shape and measure, the size of the horizontal each point of roll before record is reached the standard grade respectively, the size and the temperature of the horizontal each point of roll and the size of the horizontal each point of cooling back roll that rolls off the production line when rolling off the production line, thereby obtain through behind a rolling unit rolling the actual wear of roll and thermal expansion situation.Data in then the data that obtained and model specification being calculated are carried out analytical calculation, optimize the AVC roll;
Optimize the control of plate shape simultaneously, promptly according to different rolling units, quality requirement in conjunction with product, the distance of roll play between the scope of design roll axial float and adjacent two block plates, make roll wear more even on the roll length direction, special circumstances when changing steel grade and specifications vary suitably strengthen roll play distance, to guarantee to satisfy the needs of plate crown control;
And with the functional module relevant with plate shape control is optimized formulated in combination, mainly comprise:
A, metal lateral flow coefficient has been carried out the optimum organization configuration, revise in the model configuration file coefficient of correspondence of the ability that laterally flows to about rolled piece flakiness ratio and metal, the capacity factor that laterally flows to flakiness ratio when big weakens, limited model in the upstream frame as much as possible to the transition of target proportion convexity, keeping glacing flatness for the downstream frame creates conditions, guaranteed that metal flow equates on the band steel cross section, avoided producing shape wave;
B, to revising critical warping coefficient optimum organization configuration, change the way that in the original system all steel grades is adopted same group of band steel change of shape coefficient, combined process is analyzed, in model, different steel grades is adopted each self-corresponding band steel change of shape coefficient, make the critical warpage calculating of band steel of model more reasonable, simultaneously, for the ratio convexity that makes the downstream frame identical as far as possible, the people makes the band steel change of shape coefficient curve of each steel grade more steep, strengthen model and finish transition from the ratio convexity of intermediate blank to the target proportion convexity of finished product in preceding several frames, the flatness control of better keeping the band steel for the downstream frame provides condition;
C, to optimizing model self-learning optimization combination configuration, the adaptive learning relevant with steel-plate shape is divided into two classes in the model system, a class is the adaptive learning relevant with the steel plate characteristic, is called long-term adaptive learning; Another kind of is the self study relevant with the milling train current state, be called the short-term adaptive learning, the parameter of using these two kinds of adaptive learnings is simultaneously controlled during to steel plate rolling, steel grade takes place in the operation of rolling, when specification is jumped, can access desirable plate shape even make.
Make the AVC roll shape have the roll crown of continuous variable, adopt the suitable distance of roll play, the intermediate blank that has different intermediate blank convexitys so all can change in first three frame completed percentage convexity of finish rolling, makes the steel plate shape of producing good.
Claims (1)
1. plate shape control technology during a super wide thin plate hot continuous rolling is produced is characterized in that:
(1), roll adopts the AVC roll;
(2), accurate Calculation roll wear and thermal expansion coefficients certificate, utilize roll grinder and roll shape measuring instrument respectively to before reaching the standard grade and the roll after rolling off the production line carry out roll shape and measure, the size of the horizontal each point of roll before record is reached the standard grade respectively, the size and the temperature of the horizontal each point of roll and the size of the horizontal each point of cooling back roll that rolls off the production line when rolling off the production line, thereby obtain through behind a rolling unit rolling the actual wear of roll and thermal expansion situation; Data in then the data that obtained and model specification being calculated are carried out analytical calculation, optimize the AVC roll;
(3), the optimization of plate shape control strategy, according to different rolling units, quality requirement in conjunction with product, the distance of roll play between the scope of design roll axial float and adjacent two block plates, make roll wear more even on the roll length direction, special circumstances when changing steel grade and specifications vary suitably strengthen roll play distance, to guarantee to satisfy the needs of plate crown control;
(4), the functional module relevant with plate shape control is optimized formulated in combination, mainly comprise:
A, metal lateral flow coefficient has been carried out the optimum organization configuration, revise in the model configuration file coefficient of correspondence of the ability that laterally flows to about rolled piece flakiness ratio and metal, the capacity factor that laterally flows to flakiness ratio when big weakens, limited model in the upstream frame as much as possible to the transition of target proportion convexity, keeping glacing flatness for the downstream frame creates conditions, guaranteed that metal flow equates on the band steel cross section, avoided producing shape wave;
B, to revising critical warping coefficient optimum organization configuration, change the way that in the original system all steel grades is adopted same group of band steel change of shape coefficient, combined process is analyzed, in model, different steel grades is adopted each self-corresponding band steel change of shape coefficient, make the critical warpage calculating of band steel of model more reasonable, simultaneously, for the ratio convexity that makes the downstream frame identical as far as possible, the people makes the band steel change of shape coefficient curve of each steel grade more steep, strengthen model and finish transition from the ratio convexity of intermediate blank to the target proportion convexity of finished product in preceding several frames, the flatness control of better keeping the band steel for the downstream frame provides condition;
C, to optimizing model self-learning optimization combination configuration, the adaptive learning relevant with steel-plate shape is divided into two classes in the model system, a class is the adaptive learning relevant with the steel plate characteristic, is called long-term adaptive learning; Another kind of is the self study relevant with the milling train current state, be called the short-term adaptive learning, the parameter of using these two kinds of adaptive learnings is simultaneously controlled during to steel plate rolling, steel grade takes place in the operation of rolling, when specification is jumped, can access desirable plate even make.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203369A (en) * | 2013-03-26 | 2013-07-17 | 鞍钢股份有限公司 | Plate shape control method of hot rolled high-strength thin strip steel |
| CN106055785A (en) * | 2016-05-30 | 2016-10-26 | 北京首钢股份有限公司 | Optimization method for improving shape quality of first steel plate during changing of steel type or specification |
| CN108500067A (en) * | 2018-04-11 | 2018-09-07 | 攀钢集团攀枝花钢钒有限公司 | The plate shape method of adjustment of hot-continuous-rolling strip steel |
| CN110624954A (en) * | 2019-10-16 | 2019-12-31 | 北京首钢股份有限公司 | Plate shape control method for hot-rolled thin high-strength weathering steel |
| CN111438199A (en) * | 2020-04-08 | 2020-07-24 | 鞍钢股份有限公司 | Method for compensating original roll gap shape of roller |
| CN114011884A (en) * | 2021-10-19 | 2022-02-08 | 武汉钢铁有限公司 | Plate shape control method of cold-rolled wide plate |
-
2010
- 2010-12-30 CN CN2010106153426A patent/CN102145348A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203369A (en) * | 2013-03-26 | 2013-07-17 | 鞍钢股份有限公司 | Plate shape control method of hot rolled high-strength thin strip steel |
| CN106055785A (en) * | 2016-05-30 | 2016-10-26 | 北京首钢股份有限公司 | Optimization method for improving shape quality of first steel plate during changing of steel type or specification |
| CN106055785B (en) * | 2016-05-30 | 2019-07-12 | 北京首钢股份有限公司 | It is a kind of to improve the optimization method for changing first piece of steel strip shape quality of steel grade or specification |
| CN108500067A (en) * | 2018-04-11 | 2018-09-07 | 攀钢集团攀枝花钢钒有限公司 | The plate shape method of adjustment of hot-continuous-rolling strip steel |
| CN108500067B (en) * | 2018-04-11 | 2020-02-04 | 攀钢集团攀枝花钢钒有限公司 | Strip shape adjusting method for hot continuous rolling strip steel |
| CN110624954A (en) * | 2019-10-16 | 2019-12-31 | 北京首钢股份有限公司 | Plate shape control method for hot-rolled thin high-strength weathering steel |
| CN110624954B (en) * | 2019-10-16 | 2021-01-08 | 北京首钢股份有限公司 | Plate shape control method for hot-rolled thin high-strength weathering steel |
| CN111438199A (en) * | 2020-04-08 | 2020-07-24 | 鞍钢股份有限公司 | Method for compensating original roll gap shape of roller |
| CN114011884A (en) * | 2021-10-19 | 2022-02-08 | 武汉钢铁有限公司 | Plate shape control method of cold-rolled wide plate |
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Application publication date: 20110810 |