CN103170508B - Method for controlling width of hot rolling strip steel - Google Patents
Method for controlling width of hot rolling strip steel Download PDFInfo
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- CN103170508B CN103170508B CN201110431519.1A CN201110431519A CN103170508B CN 103170508 B CN103170508 B CN 103170508B CN 201110431519 A CN201110431519 A CN 201110431519A CN 103170508 B CN103170508 B CN 103170508B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 19
- 239000010959 steel Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000005098 hot rolling Methods 0.000 title abstract description 5
- 238000003079 width control Methods 0.000 claims abstract description 26
- 238000012937 correction Methods 0.000 claims abstract description 11
- 238000005096 rolling process Methods 0.000 claims abstract description 11
- 238000005259 measurement Methods 0.000 claims description 36
- 238000003801 milling Methods 0.000 claims description 29
- 238000004891 communication Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract 2
- 239000000047 product Substances 0.000 description 10
- 239000013067 intermediate product Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 230000002950 deficient Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000003607 modifier Substances 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 230000009123 feedback regulation Effects 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention belongs to the technical field of hot rolling production and control, and provides a method for controlling the width of hot rolling strip steel. Width-measuring devices are additionally arranged at the front and the back of a vertical rolling mill of width-controlling equipment, width data of strip billets at the front and the back of a horizontal mill are collected in real time, the real-time width data are transmitted to a data acquisition system before the strip billets enter the mill, and the data acquisition system transmits the width data to a model system; the model system compares the width data acquired in real time with predicted data predicted by a model, and then determines whether width control is corrected or not, if width disturbance is large, width open loop feedforward control is carried out at first, after the belt billets leave the width-controlling equipment and the horizontal mill, mill rear width detection equipment sends corresponding data to the model system, the model system carries out calculation again, on-line control of a vertical roll is achieved through basic automation, and therefore closed loop feedback control is formed. Width detection is carried out on a plate billet at first before the plate billet enters the width-controlling equipment, dynamic correction is carried out on basic automation system control equipment, and therefore the width disturbance is reduced, and width feedforward and feedback dynamic control is realized.
Description
Technical field
The invention belongs to hot rolling production control technical field, be specifically related to a kind of method that Hot Strip Width is controlled.
Background technology
Hot Strip Width is the important indicator in hot-strip product always, and width control technology is all that after utilizing milling train, width gage equipment carries out width FEEDBACK CONTROL both at home and abroad at present.Its cardinal principle is that hot-rolled billet is by controlling after wide equipment, field instrument carries out width data sampling to it, and the feedback data after sampling is submitted to width and control model module, width is controlled model module and is compared according to the desired value of on-the-spot feedback data and model precomputation, if two width values are basically identical, think that width is controlled and correctly do not take width correction to control, if having deviation is width disturbance, it is carried out to width correction, guarantee width control accuracy, this control method has an important shortcoming: change is waited and disturbs adaptive capacity poor, when if the deviation detecting is larger, feedback cannot be carried out rational width adjusting.
Hot rolling slab supplied materials often occurs in actual production process after width control appliance, the value deviation of its value of feedback and precomputation is larger, after by feedback modifiers, cannot meet the requirement of production control precision.Cause the main cause of this phenomenon to be when the interference factors such as slab supplied materials width difference are larger, because equipment cannot obtain issuable width disturbance quantity in advance, thereby cannot revise width, control processing, cause width working control deviation larger.
Summary of the invention
Technical problem to be solved by this invention is that the shortcoming for above prior art existence, proposes a kind of method that Hot Strip Width is controlled, and can realize width feedforward and add dynamically control of feedback, reduces width FEEDBACK CONTROL correction disturbance, improves control accuracy.
The technical scheme that the present invention solves above technical problem is:
A kind of method that Hot Strip Width is controlled, before and after milling train, be provided with width measure equipment, the width control appliance that milling train has comprises automatic control system, data collecting system, model system and communication system, it is characterized in that: described Hot Strip Width is controlled and carried out according to the following steps:
(1) by the width measure device measuring band steel before described milling train, enter the actual measurement of first before milling train width value, the first actual measurement width value is uploaded to described data collecting system, and described data collecting system is passed to described model system by the first actual measurement width value data;
(2) described model system compares to such an extent that deviate by the rolling made-up belt width value of step (one) first actual measurement width value and model system prediction, whether judgment bias value is in the adjustable extent of setting, if deviate is in the adjustable extent of setting, the first actual measurement width value that described model system is introduced step () calculating that feedovers, described feedforward is calculated as: predicted width value * weight coefficient+(1.0-weight coefficient) * first actual measurement width value, and a width controlled quentity controlled variable using the difference of described feedforward calculated value and the width value of the finished strip that will produce as described width control appliance is rolled entering the band steel of milling train, then enter next step, if deviate is not in the adjustable extent of setting, described model system is not carried out strip width correction, directly enters next step,
(3) band steel is after milling train, the second actual measurement width value of width measure device measuring band steel after milling train after described milling train, described the second actual measurement width value is uploaded to described data collecting system, described data collecting system is passed to described model system by the second actual measurement width value data, judge whether width control completes, the no finishing control that completes; If do not finish, enter step;
(4) described model system compares to such an extent that deviate by the rolling made-up belt width value of step (three) second actual measurement width values and model system prediction, whether judgment bias value is in the adjustable extent of setting, if deviate is in the adjustable extent of setting, second of described model system introducing step (three) the actual measurement width value feeds back calculating, described feedback is calculated as: predicted width value * weight coefficient+(1.0-weight coefficient) * second actual measurement width value, and the secondary width controlled quentity controlled variable using the difference of described feedback calculated value and the width value of the finished strip that will produce as described width control appliance is rolled entering the band steel of milling train, then return to step (three), loop, if deviate is not in the adjustable extent of setting, described model system is not carried out strip width correction, directly returns to step (three), loops.
The technical scheme that the present invention further limits is:
The method that aforesaid Hot Strip Width is controlled, weight coefficient is 0.6.Each steel mill of weight coefficient can determine according to actual conditions.
The present invention controls in model and has introduced feedforward plus feedback control technology at width, thereby effectively having solved single FEEDBACK CONTROL waits and disturbs the poor shortcoming of adaptive capacity change, by the comparison of actual measured width data before milling train and model precomputation data volume, realized open loop feedforward control, determine the wide amount of actual control, and be handed down to control wide equipment carry out developed width control, on-the-spot made-up belt width control forecasting data reduce because cannot be grasped, and cause the excessive situation of equipment controlled quentity controlled variable, also reduce the correction of width FEEDBACK CONTROL below simultaneously, the final width control accuracy that improves.
Accompanying drawing explanation
Fig. 1 is equipment connection schematic diagram of the present invention.
Fig. 2 is flow chart of the present invention.
Fig. 3 is the made-up belt width indication figure of embodiment 1.
Fig. 4 is the made-up belt width indication figure of embodiment 2.
The specific embodiment
The present invention is a kind of method that Hot Strip Width is controlled, equipment connection as shown in Figure 1, comprise the width control appliance 2 of horizontal mill 1 and be located at the rear width measure equipment 3 after horizontal mill, before width control appliance 2, be also provided with a front width measure equipment 4, front width measure equipment 4 and rear width measure equipment 3 all communicate to connect with width control appliance 2; Hot Strip Width is controlled and to be carried out according to the following steps, flow process as shown in Figure 2:
(1) by the width measure device measuring band steel before described milling train, enter the actual measurement of first before milling train width value, the first actual measurement width value is uploaded to described data collecting system, and described data collecting system is passed to described model system by the first actual measurement width value data;
(2) described model system by the rolling made-up belt width value of step (one) first actual measurement width value and model system prediction, (determine by issuing made-up belt width data and made-up belt thermal coefficient of expansion, is that model dopes the width after made-up belt is controlled according to the requirement of controlling by the rolling made-up belt width of prediction.) compare to such an extent that deviate, whether judgment bias value is in the adjustable extent (each steel mill of adjustable extent can determine according to actual conditions) of setting, if deviate is in the adjustable extent of setting, the first actual measurement width value that described model system is introduced step () calculating that feedovers, described feedforward is calculated as: predicted width value * weight coefficient+(1.0-weight coefficient) * first actual measurement width value, and a width controlled quentity controlled variable using the difference of described feedforward calculated value and the width value of the finished strip that will produce as described width control appliance is rolled entering the band steel of milling train, then enter next step, if deviate is not in the adjustable extent of setting, described model system is not carried out strip width correction, directly enters next step,
(3) band steel is after milling train, the second actual measurement width value of width measure device measuring band steel after milling train after described milling train, described the second actual measurement width value is uploaded to described data collecting system, described data collecting system is passed to described model system by the second actual measurement width value data, judge whether width control completes, the no finishing control that completes; If do not finish, enter step;
(4) described model system compares to such an extent that deviate by the rolling made-up belt width value of step (three) second actual measurement width values and model system prediction, whether judgment bias value is in the adjustable extent of setting, if deviate is in the adjustable extent of setting, second of described model system introducing step (three) the actual measurement width value feeds back calculating, described feedback is calculated as: predicted width value * weight coefficient+(1.0-weight coefficient) * second actual measurement width value, and the secondary width controlled quentity controlled variable using the difference of described feedback calculated value and the width value of the finished strip that will produce as described width control appliance is rolled entering the band steel of milling train, then return to step (three), loop, if deviate is not in the adjustable extent of setting, described model system is not carried out strip width correction, directly returns to step (three), loops.
If according to the width of different rolling made-up belts be 1250mm under the prerequisite of same thickness, while producing the intermediate blank product of different size width, before its horizontal mill, width controlled quentity controlled variable of the wide equipment of control is X, the corresponding relation of X is as shown in the table:
Table 1
| Made-up belt width | A width controlled quentity controlled variable X | Intermediate products width |
| 1250mm | 50mm | 1200mm |
| 1250mm | 30mm | 1220mm |
| 1250mm | 20mm | 1230mm |
| 1250mm | 0mm | 1250mm |
| 1230mm | 50mm | 1180mm |
| 1230mm | 30mm | 1200mm |
| 1230mm | 20mm | 1210mm |
| 1230mm | 0mm | 1230mm |
| 1200mm | 50mm | 1150mm |
| 1200mm | 30mm | 1170mm |
| 1200mm | 20mm | 1180mm |
| 1200mm | 0mm | 1200mm |
If width overshoot can be revised by feedback width control method with interior at 35mm, otherwise the product of producing is defective :-35mm <=(intermediate products width-final products width) <=+ 35mm.
Embodiment 1
While producing the product of 1200mm, if model precomputation supplied materials made-up belt width is greater than actual measured width, as shown in Figure 3, if the width of model prediction rolling made-up belt is 1250mm in Fig. 3, and width measure device measuring result is 1200mm before real standard milling train, illustrate that model predication value is greater than actual measured value, also just illustrate that actual made-up belt is narrower than the made-up belt of estimating.
If do not adopt width control method of the present invention, before horizontal mill, width controlled quentity controlled variable of the wide equipment of control is 50mm, because actual made-up belt is 1200mm, causing the intermediate products width of producing is 1150mm, width extent deviation-50mm, surpass feedback regulation scope, cause final products defective.
According to width control method of the present invention, two values are compared to such an extent that deviate for 50mm, judge whether 50mm can control range tire out, if in can control range, model is introduced actual measured width and model prediction width data is weighted (weight coefficient is 0.6), 1250 * 0.6+ (1.0-0.6) * 1200=1230mm, model is controlled width controlled quentity controlled variable of wide equipment before adjusting horizontal mill, by original 50mm, be reduced to 30mm, although intermediate products are now 1170mm, but in feedback control range 35mm, model can pass through feedback modifiers, thereby finally guarantee product 1200mm width quality control precision.
Embodiment 2
While producing the product of 1200mm, if model precomputation supplied materials made-up belt width is less than actual measured width, as shown in Figure 4, if the width of model prediction rolling made-up belt is 1200mm in Fig. 4, and width measure device measuring result is 1250mm before real standard milling train, illustrate that model predication value is less than actual measured value, also just illustrate that actual made-up belt is wider than the made-up belt of estimating.
If do not adopt width control method of the present invention, before horizontal mill, width controlled quentity controlled variable of the wide equipment of control is 0mm, because actual made-up belt is 1250mm, causing the intermediate products width of producing is 1250mm, width extent deviation+50mm, surpass feedback regulation scope, cause final products defective.
According to width control method of the present invention, two values are compared to such an extent that deviate for 50mm, judge whether 50mm can control range tire out, if in can control range, model is introduced actual measured width and model prediction width data is weighted (weight coefficient is 0.6), 1200 * 0.6+ (1.0-0.6) * 1250=1220mm, model is controlled width controlled quentity controlled variable of wide equipment before adjusting horizontal mill, by original 0mm, increase to 20mm, although intermediate products are now 1230mm, but in feedback control range 35mm, model can pass through feedback modifiers, thereby finally guarantee product 1200mm width quality control precision.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (2)
1. the method that a Hot Strip Width is controlled, before and after milling train, be provided with width measure equipment, the width control appliance that milling train has comprises automatic control system, data collecting system, model system and communication system, it is characterized in that: described Hot Strip Width is controlled and carried out according to the following steps:
(i) by the width measure device measuring band steel before described milling train, enter the actual measurement of first before milling train width value, the first actual measurement width value is uploaded to described data collecting system, described data collecting system is passed to described model system by the first actual measurement width value data;
(ii) described model system by step (i) the rolling made-up belt width value of the first actual measurement width value and model system prediction compare and draw deviate, whether judgment bias value is in the adjustable extent of setting, if deviate is in the adjustable extent of setting, described model system is introduced the calculating that feedovers of step the first actual measurement width value (i), described feedforward is calculated as: predicted width value * weight coefficient+(1.0-weight coefficient) * first actual measurement width value, and the difference of the value that described feedforward is calculated and the width value of the finished strip that will produce is rolled entering the band steel of milling train as a width controlled quentity controlled variable of described width control appliance, then enter next step, if deviate is not in the adjustable extent of setting, described model system is not carried out strip width correction, directly enters next step,
(iii) be with steel after milling train, the second actual measurement width value of width measure device measuring band steel after milling train after described milling train, described the second actual measurement width value is uploaded to described data collecting system, described data collecting system is passed to described model system by the second actual measurement width value data, judge whether width control completes, if complete finishing control; If do not complete, enter next step;
(iv) described model system by step (iii) the rolling made-up belt width value of the second actual measurement width value and model system prediction compare and draw deviate, whether judgment bias value is in the adjustable extent of setting, if deviate is in the adjustable extent of setting, described model system introducing step the second actual measurement width value (iii) feeds back calculating, described feedback is calculated as: predicted width value * weight coefficient+(1.0-weight coefficient) * second actual measurement width value, and the difference of the value that described feedback is calculated and the width value of the finished strip that will produce is rolled entering the band steel of milling train as the secondary width controlled quentity controlled variable of described width control appliance, then return to step (iii), loop, if deviate is not in the adjustable extent of setting, described model system is not carried out strip width correction, directly returns to step (iii), loops.
2. the method that Hot Strip Width as claimed in claim 1 is controlled, is characterized in that: described weight coefficient is 0.6.
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| CN201110431519.1A CN103170508B (en) | 2011-12-21 | 2011-12-21 | Method for controlling width of hot rolling strip steel |
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| CN201110431519.1A CN103170508B (en) | 2011-12-21 | 2011-12-21 | Method for controlling width of hot rolling strip steel |
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| CN104707869B (en) * | 2013-12-17 | 2017-01-18 | 上海梅山钢铁股份有限公司 | Hot rolling width model fast dynamic self-adapting method |
| CN104942019B (en) * | 2014-03-31 | 2017-04-05 | 宝山钢铁股份有限公司 | A kind of cold rolling of strip steel process Automatic control method of width |
| CN104324948B (en) * | 2014-11-06 | 2016-04-06 | 东北大学 | A kind of rougher of hot strip mill process rolled piece width control method |
| CN105013831B (en) * | 2015-06-18 | 2018-09-18 | 首钢京唐钢铁联合有限责任公司 | Strip steel width control method and strip steel width symmetrical control method |
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| CN105583238B (en) * | 2016-01-25 | 2017-06-16 | 东北大学 | A Method for Predicting the Width of Hot-rolled Strip Steel |
| CN105642676B (en) * | 2016-03-07 | 2017-08-08 | 首钢京唐钢铁联合有限责任公司 | Method for controlling width model by utilizing roll gap value of side guide plate |
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| CN108672502B (en) * | 2018-07-05 | 2020-01-07 | 河钢股份有限公司承德分公司 | Plate strip steel width control method and device and terminal equipment |
| CN108994086B (en) * | 2018-09-25 | 2020-07-24 | 首钢集团有限公司 | Strip steel width feedback correction method |
| CN109926452B (en) * | 2019-04-16 | 2020-09-08 | 河北津西钢铁集团股份有限公司 | Process control method, process control device and terminal applied to steel rolling |
| CN112845615B (en) * | 2020-12-29 | 2022-09-30 | 中铝西南铝板带有限公司 | Method for compensating width of rolled plate shape of aluminum alloy strip |
| CN115463975A (en) * | 2021-06-10 | 2022-12-13 | 宝山钢铁股份有限公司 | Optimization control method based on slab rough rolling width measurement |
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