CN102345009B - Method for automatically correcting tracking process of heating furnace - Google Patents
Method for automatically correcting tracking process of heating furnace Download PDFInfo
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- CN102345009B CN102345009B CN 201110320090 CN201110320090A CN102345009B CN 102345009 B CN102345009 B CN 102345009B CN 201110320090 CN201110320090 CN 201110320090 CN 201110320090 A CN201110320090 A CN 201110320090A CN 102345009 B CN102345009 B CN 102345009B
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Abstract
The invention discloses a method for automatically correcting the tracking process of a heating furnace. The method comprises the following steps of: after a walking beam moves by a step pitch, obtaining the step pitch of the walking beam, a laser detection mark and an overflow quantity of blanks after laser detection; on the basis of the obtained step pitch of the walking beam, updating the positions of the blanks in the heating furnace; on the basis of the laser detection mark, the laser detection overflow quantity and the updated blank positions, determining whether the positions of the blanks need to be subjected to tracking correction or not; when the shortest position in a plurality of blanks is less than the position of a targeting laser and the laser detection mark is equal to 0, carrying out advanced tracking correction on the updated positions of the blanks in the heating furnace; and when the shortest position in a plurality of blanks is greater than the position of the targeting laser and the laser detection mark is equal to 1, carrying out lagging tracking correction on the updated positions of the blanks in the heating furnace.
Description
Technical field
The present invention relates to a kind of process tracking automatic correcting method of process furnace, more particularly, relate to the process tracking automatic correcting method of automatic decision and the process furnace of the position of revising blank.
Background technology
Process furnace is the visual plant that steel rolling is produced, for rear operation provides continuously high temperature blank.It is large that process furnace has a capacity, according to characteristics such as processing requirement rapid heating.Presently used process furnace generally can hold dozens or even hundreds of compact material simultaneously, adopts burning control model that blank is carried out Automatic-heating.For the blank of process furnace, by following the tracks of the positional information that obtains blank.Tracking is as the basis of control techniques, only have strict guarantee follow the tracks of accurately or the position of following the tracks of in limit of error, guarantee control accuracy, production safety, quality product.Blank is many in the process furnace, only has every compact is anticipated the position accurately, the accuracy that the forecast precision of guarantee burning control model and control are adjusted.Because accumulative total when the systematic error of the equipment such as dress steel machine, stepper itself and a large amount of and length that protection causes error; therefore the actual problem that exceeds the error allowed band with the calculating tracing deviation of following the tracks of of blank appears; cause the position of the blank that shows not conform to physical location, cause thus the blank heating Quality Down.
And the tracking correcting mode of traditional process furnace, all be when obvious trail-and-error occurring, by manually adjustment member or all tracing positional of blank, this inevitable appearance is adjusted untimely, or overshoot etc., simultaneously also increase hand labor intensity, and on the other hand, also affected the heating quality of product.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the invention provides the process tracking automatic correcting method of the process furnace of automatic decision and the position of correction blank in process furnace.
Process tracking automatic correcting method according to a kind of process furnace of the embodiment of the invention comprises the steps: after walking beam moves a step pitch, obtains the spillage of blank after walking beam step pitch, laser detection sign, the laser detection; Upgrade the position of blank in process furnace based on the walking beam step pitch that obtains; Based on described laser detection sign, the position of the blank after the described laser detection after the spillage of blank and the renewal, determine whether and to follow the tracks of correction to the position of blank, when Lmin equals 0 less than Lj and laser detection sign, by following equation correction is followed the tracks of in the position of the blank in the process furnace, L '=L+ (Lj-Lmin) * (Lmax-L)/(Lmax-Lmin), when Lmin equals 1 greater than Lj and laser detection sign, by following equation correction is followed the tracks of in the position of blank, L '=L+ (Lj-Ly-Lmin) * (Lmax-L)/(Lmax-Lmin), wherein, Lmax and Lmin be illustrated respectively in the position of the blank after the renewal from steel-tapping end farthest with the position of nearest blank, L is the position of the blank after upgrading, L ' for through blank after tracking revising the position, Ly is the spillage of blank after the laser detection, and Lj is the distance of locating laser device and steel-tapping end.
In addition, when Lmin equals 0 less than Lj, laser detection sign, and | Lj-Lmin| is greater than the preposition deviation in limited time, correction is followed the tracks of in position to blank, when Lmin equals 0 less than Lj, laser detection sign, and | Lj-Lmin| does not follow the tracks of correction to the position of blank less than described preposition deviation in limited time.
In addition, when Lmin equals 1 greater than Lj, laser detection sign, and | Lj-Ly-Lmin| is greater than the preposition deviation in limited time, correction is followed the tracks of in position to blank, when Lmin equals 1 greater than Lj, laser detection sign, and | Lj-Ly-Lmin| prescribes a time limit less than position deviation, correction is not followed the tracks of in the position of blank.
As mentioned above, by the blank position after the each stepping of process furnace walking beam is judged in good time, eliminated deviation accumulation, guarantee that the tracking in the process furnace is normal, the combustion model blank temperature of following the tracks of on the basis calculates and the precision of furnace temperature decision-making so that be based upon, promote the temperature quality of heating blank, guaranteed rolling stable and the finished product performance.
Description of drawings
(a) of Fig. 1 and the physical location that blank (b) is shown need the leading situation about revising of following the tracks of greater than theoretical position;
(a) of Fig. 2 and the physical location that blank (b) is shown need less than theoretical position to lag behind and follow the tracks of situation about revising;
Fig. 3 is the schema according to the process tracking automatic correcting method of the process furnace of the embodiment of the invention.
Embodiment
Now the embodiment of the invention is described in detail, its example shown in the accompanying drawings, wherein, identical label represents same parts all the time.Below with reference to the accompanying drawings embodiment is described to explain the present invention.
In the following description, unless description is arranged in addition, the blank position refers to the distance between the steel-tapping end of blank and process furnace.
The unusual general two kinds of situations that have of tracking in the process furnace.With reference to Fig. 1, a kind of situation is that the physical location of blank is greater than theoretical position.That is to say, the locating laser device that is arranged at steel-tapping end does not detect blank (with reference to (a) of Fig. 1), but represent blank put in place (that is, at least one blank has passed through described locating laser device, with reference to (b) of Fig. 1) by the result who calculate to obtain.For this situation, need to follow the tracks of in advance correction to the position of the calculating of blank, the position of calculating is conformed to physical location.
With reference to Fig. 2, another kind of situation is that the physical location of blank is less than theoretical position.That is to say, the locating laser device that is arranged at steel-tapping end detects blank (with reference to (a) of Fig. 2), but represent blank do not put in place (that is, not having blank through described locating laser device, with reference to (b) of Fig. 2) by the result who calculate to obtain.For this situation, need to lag behind to the position of the blank of Theoretical Calculation to follow the tracks of and revise, the position of calculating is conformed to physical location.
Below, describe according to the process furnace internal procedure of the embodiment of the invention with reference to Fig. 3 and to follow the tracks of automatic correcting method.
In step 301, after walking beam moves a step pitch, the spillage Ly of blank after acquisition walking beam step pitch BL, laser detection sign FLAG, the laser detection.
Here, walking beam step pitch BL represents the length of a step pitch of walking beam.As known in the art, process furnace comprises the walking beam controller for the movement of control step beam.Can obtain walking beam step pitch BL from this walking beam controller.Here, walking beam step pitch BL is generally 550mm, but is not limited to this.The walking beam controller can change as required walking beam one and go on foot the distance that moves.
Near the steel-tapping end that is arranged at process furnace locating laser device (seeing figures.1.and.2) is when detecting blank, and laser detection sign FLAG is 1, and no person's laser detection sign FLAG is 0.
Spillage Ly refers to the length that blank protrudes from locating laser after the laser detection,, detects the distance that blank moves to the mobile interval blank of walking beam (or walking beam move distance) from locating laser that is.
In step 302, based on the walking beam step pitch BL that obtains, upgrade the position of blank.That is, with the position of blank and the position of walking beam step pitch BL phase Calais renewal blank.
Here, the position of blank refers to the distance of blank and steel-tapping end.
In step 303, the position based on the blank after spillage Ly after walking beam step pitch BL, laser detection sign FLAG, the laser detection and the renewal determines whether and need to revise the position of blank.
When step 303 is determined to revise, revise in the position of step 304 pair blank.
Below, describe the method that the position of blank is revised in detail.
In the position of the blank after renewal, be respectively Lmax and Lmin with the position of nearest blank farthest from steel-tapping end, the distance of locating laser device and steel-tapping end is Lj.
When Lmin equals 1 or Lmin when equaling 0 greater than Lj and laser detection sign FLAG less than Lj and laser detection sign FLAG, the position of the blank after expression is upgraded (namely, the calculation result of position) conform to physical location, therefore do not need the position of blank is revised.
When Lmin equaled 0 less than Lj and laser detection sign FALG, the calculation result of the position of blank represented that at least one blank has passed through the locating laser device that is arranged at steel-tapping end, and the locating laser device does not detect blank.At this moment, need to follow the tracks of in advance correction to the position of blank.
By following equation (1) position of blank is followed the tracks of correction in advance.
L’＝L+(Lj-Lmin)×(Lmax-L)/(Lmax-Lmin) (1)
Wherein, L is the position of the blank after upgrading, and L ' is the leading position of following the tracks of revised blank of process.
Here, in order to reduce the number of times of follow the tracks of revising, position deviation that also can be by the blank in the more current process furnace (that is, | Lj-Lmin|) limit to determine whether to follow the tracks of in advance correction with the position deviation that pre-sets.That is, when walking beam step pitch BL is not equal to zero, Lmin less than L, laser detection sign FLAG equal 0 and | Lj-Lmin| prescribes a time limit greater than position deviation, and by formula (1) follows the tracks of correction in advance to blank; And when walking beam step pitch BL is not equal to zero, Lmin equals 0 less than L, laser detection sign FLAG, and | Lj-Lmin| prescribes a time limit less than position deviation, and blank is not followed the tracks of correction.Here, can come setting position deviation limit according to the precision of follow the tracks of revising, and described position deviation limit is less than the walking beam step pitch, for example, less than 1/10th of walking beam step pitch.
Here, the position L ' from the nearest blank of steel-tapping end that revises based on equation (1) equals Lj, that is, after revising in advance, the position of the first compact material (that is, from the nearest blank of steel-tapping end) and locating laser device the position identical.As known to those skilled in the art, the width of slab generally be greater than (or, much larger than) the walking beam step pitch, therefore the above results represents that the position of the first compact material is corrected for the position of infinite approach locating laser device, rather than equal the position of locating laser device, thereby prevented overshoot, can be more fast and stably revise the position of blank.
When Lmin equals 1 greater than Lj and laser detection sign FLAG, the locating laser device that the calculation result of the position of blank represents do not have blank to pass through and is arranged at steel-tapping end, and the locating laser device detects blank.At this moment, need to lag behind to the position of blank and follow the tracks of to revise.
By following equation (2) position of blank is lagged behind to follow the tracks of and revise.
L’＝L+(Lj-Ly-Lmin)×(Lmax-L)/(Lmax-Lmin) (2)
Wherein, L is the position of the blank after upgrading, L ' for through leading follow the tracks of revise after blank the position, Ly is spillage after the laser detection.
Here, similar to leading tracking, in order to reduce the number of times of follow the tracks of revising, also can be by relatively | the tracking correction of limitting to determine whether to lag behind of Lj-Ly-Lmin| and position deviation.That is, when the walking beam step pitch is not equal to 0, Lmin greater than L, laser detection sign equal 1 and | Lj-Ly-Lmin| prescribes a time limit greater than position deviation, by above-mentioned equation (2) civilian post of blank is lagged behind to follow the tracks of and revises; And when the walking beam step pitch is not equal to 0, Lmin greater than L, laser detection sign equal 1 and | Lj-Ly-Lmin| prescribes a time limit less than position deviation, and correction is not followed the tracks of in the position of blank.
Owing to be loaded into more afterwards the blank of process furnace (namely, from the blank of steel-tapping end away from) time of moving in process furnace is short, so relatively early be loaded into the blank of process furnace (namely, from the blank of steel-tapping end close to), the impact that is subject to systematic error and equipment error is little, therefore the tracking modified value that these blanks is needed is also relatively little, does not perhaps need to revise (for example, for the blank that is loaded at last process furnace).Equation (1) also conforms to it with the calculation result of equation (2),
When do not need in step 303, determining blank revised, in step 305, blank is not revised.
In addition, according to another embodiment of the present invention, for the ease of calculating and using, can set up the laggard line trace correction of array according to the blank position in the process furnace.
Below, describe process furnace internal procedure of the present invention in detail in conjunction with example and follow the tracks of automatic correcting method.
Suppose 10 compact material are housed in the process furnace, and maximum position Lmax=13050mm, minimum position Lmin=2050mm, the locating laser of the blank in the process furnace are to the distance L j=1750mm of steel-tapping end, current walking beam step pitch BL=550mm.In addition, the position deviation limit is set to 40mm, and the blank position in the process furnace is as shown in table 1.
Table 1 blank position
Create the position array dis[n of blank].N is dynamic value, according to the actual blank in the process furnace quantity and dynamic change.Because the at present blank numerical digit 10 in the process furnace, so n=10, the position array is dis[10].Like this, can have as shown in table 2 according to positional number set of dispense position.
Table 2 is according to the location tables of position data
Obtain walking beam step pitch BL=550mm, spillage Ly=0 after laser detection sign FLAG=0 and the laser detection.
According to the position of the walking beam step pitch renewal blank that obtains, can come the position is upgraded with following renewal equation.
dis[n]＝dis[n]-BL。
The position of the blank of the renewal that so obtains is as shown in table 3.
Blank position after table 3 upgrades
At this moment, Lmin=1500mm＜Lj=1750mm, FLAG=0, and | Lj-Lmin|=0.25＞position deviation limit=40mm, therefore, need to follow the tracks of correction in advance according to equation (1).
According to equation (1), the revised position of leading tracking of the first compact material is
dis[0]＝1.5+(1.75-1.5)×(12.5-1.5)/(12.5-1.5)＝1.75m
Equally, according to equation (1), the position of calculating other blank, its position is as shown in table 4.
The revised position of the leading tracking of table 4
By the blank position data after the each stepping of process furnace walking beam is judged in good time, eliminated deviation accumulation, guarantee to follow the tracks of in the stove normal, the combustion model blank temperature of following the tracks of on the basis calculates and the precision of furnace temperature decision-making so that be based upon, promote the temperature quality of heating blank, guaranteed rolling stable and the finished product performance.
Although represented and described some embodiments of the present invention, it should be appreciated by those skilled in the art that in the situation that does not break away from the principle of the present invention that limited its scope by claim and equivalent thereof and spirit, can make amendment to these embodiment.
Claims (3)
1. the process tracking automatic correcting method of a process furnace is characterized in that, described method comprises the steps:
After walking beam moves a step pitch, the spillage of blank after acquisition walking beam step pitch, laser detection sign, the laser detection;
Upgrade the position of blank in process furnace based on the walking beam step pitch that obtains;
Based on the spillage of blank after described laser detection sign, the described laser detection and the position of the blank after the renewal, determine whether and need to follow the tracks of correction to the position of blank,
When Lmin equals 0 less than Lj and laser detection sign, by following equation correction is followed the tracks of in the position of the blank in the process furnace,
L’＝L+(Lj-Lmin)×(Lmax-L)/(Lmax-Lmin)，
When Lmin equals 1 greater than Lj and laser detection sign, by following equation correction is followed the tracks of in the position of blank,
L’＝L+(Lj-Ly-Lmin)×(Lmax-L)/(Lmax-Lmin)，
Wherein, Lmax and Lmin be illustrated respectively in the position of the blank after the renewal from steel-tapping end farthest with the position of nearest blank, L is the position of the blank after upgrading, L ' is the position of blank after revising through tracking, Ly is the spillage of blank after the laser detection, Lj is the distance of locating laser device and steel-tapping end
Wherein, when described locating laser device detected blank, laser detection was masked as 1, otherwise laser detection is masked as 0.
2. the process tracking automatic correcting method of process furnace according to claim 1 is characterized in that,
When Lmin equals 0 less than Lj, laser detection sign, and | Lj-Lmin| follows the tracks of correction to the position of blank greater than the preposition deviation in limited time,
When Lmin equals 0 less than Lj, laser detection sign, and | Lj-Lmin| does not follow the tracks of correction to the position of blank less than described preposition deviation in limited time.
3. the process tracking automatic correcting method of process furnace according to claim 1 is characterized in that,
When Lmin equals 1 greater than Lj, laser detection sign, and | Lj-Ly-Lmin| follows the tracks of correction to the position of blank greater than the preposition deviation in limited time,
When Lmin equals 1 greater than Lj, laser detection sign, and | Lj-Ly-Lmin| prescribes a time limit less than position deviation, correction is not followed the tracks of in the position of blank.
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| CN103381425B (en) * | 2012-05-03 | 2015-08-05 | 攀钢集团攀枝花钢钒有限公司 | A kind of method eliminating the head of rail or the roll mark of bottom |
| CN102679725B (en) * | 2012-05-25 | 2014-04-09 | 中冶南方（武汉）自动化有限公司 | Fault diagnosis and fault tolerance control method and system used for material tracking system |
| CN104878191B (en) * | 2014-02-28 | 2017-02-15 | 宝山钢铁股份有限公司 | Control method for preventing slab from smashing and hitting walking furnace fixation beam |
| CN104178622B (en) * | 2014-08-22 | 2016-06-29 | 重庆钢铁集团电子有限责任公司 | The step rate control method of regenerative walking-beam furnace |
| CN105671302B (en) * | 2016-02-16 | 2018-04-03 | 山信软件股份有限公司 | A kind of furnace plate blank automatic positioning method and system |
| CN108955289B (en) * | 2018-06-06 | 2021-04-13 | 日照钢铁控股集团有限公司 | Automatic correction method and device for steel loading position, storage equipment and storage medium |
| CN110595207A (en) * | 2019-08-13 | 2019-12-20 | 南京钢铁股份有限公司 | Control method for accurate positioning of heating furnace walking beam |
| CN110542322B (en) * | 2019-08-21 | 2021-09-21 | 中国电子科技集团公司第四十八研究所 | Material process control method, system, device and medium for continuous sintering furnace |
| CN111270067B (en) * | 2020-02-11 | 2021-08-17 | 鞍山紫竹科技型钢有限公司 | Error compensation method for step control of walking beam by using area method of average value |
| CN112414149B (en) * | 2020-10-29 | 2022-08-02 | 宝武杰富意特殊钢有限公司 | Tapping control method and device and tapping equipment |
| CN113462885A (en) * | 2021-06-07 | 2021-10-01 | 山西太钢不锈钢股份有限公司 | Dynamic positioning method applied to narrow space of heating furnace |
| CN113369313B (en) * | 2021-06-15 | 2022-04-01 | 阳春新钢铁有限责任公司 | Intelligent steel rolling number separation control method |
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