CN101153794A - Method for on-line measuring sickle curve of plate blank - Google Patents
Method for on-line measuring sickle curve of plate blank Download PDFInfo
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- CN101153794A CN101153794A CNA2006101165011A CN200610116501A CN101153794A CN 101153794 A CN101153794 A CN 101153794A CN A2006101165011 A CNA2006101165011 A CN A2006101165011A CN 200610116501 A CN200610116501 A CN 200610116501A CN 101153794 A CN101153794 A CN 101153794A
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Abstract
The invention discloses a method of online measuring a slab camber, as a characteristic that laser can precisely measure a distance is used, two lasers are provided to be combined with a laser in the primary slab width gauge based on the primary slab width gauged, a three-point distance measurement is formed at one side of the slab to measure a curvature of the slab; the laser scans the edge of the slab with a certain frequency, a distance between the slab and the laser is received and inputted into a computer, a contour curve of the edge of the slab is recorded and delineated by the computer, and then two endpoints are connected to make a line L, a distance from each point of the line L to the edge of the slab is calculated, and a maximum is received as a camber value of the slab. The invention uses the function of laser ranging, while online casting, a degree of the camber of the slab is precisely measured under high temperature, a quality situation of online producing slab is mastered in time and an occurrence of major quality accident is prevented.
Description
Technical field
The present invention relates to measuring technique, particularly the method for on-line measurement sickle curve of plate blank.
Background technology
The measurement of slab physical dimension, be that indispensable equipment is produced in each modernized steel mill continuous casting, hot rolling both at home and abroad at present, each steel mill is according to the characteristics and the demand of self equipping, the slab profile measuring system of design, installation different function requirements, be used to control the physical dimension of continuous casting steel billet, and, can effectively improve the quality of hot rolled coil for following operation slab rolling provides reliable slab dimensional data.
At present, design is both at home and abroad produced slab shape dimension measurement instrument and is mainly contained U.S. ASC, Sweden Limab, German LAP company, all adopts the principle of laser ranging, and width of plate slab, thickness, length equidimension are measured.
But, the actual achievement of using from above-mentioned company as can be known, the purposes and the measurement range of all types of slab shape dimension measurement instrument have nothing in common with each other, but all fail every measurement function is effectively combined, and all not to the slab significant dimensions---the measurement function of camber.
The physical dimension of slab plays a part crucial to the quality behind the slab rolling.The profile of slab is except width, length, thickness, limit portion shape, the camber degree of slab is also most important, can cause and roll mass defects such as coil of strip limit, back is split, slit is excessive, can cause slab steel-fastening accident in the hot rolling unit when serious, unit equipment is caused damage.
Therefore, all there is strict control in each steel mill to sickle curve of plate blank, and in the company standard of slab, industry standard, the national standard, all there are strict requirements to the camber of slab, as Baosteel stock Stainless Steel Branch sickle curve of plate blank standard-required less than 40mm.
And in the continuous casting steel billet production run,, form the inner left and right sides of slab cooling stress to differ greatly, thereby the sickle curve of plate blank phenomenon that happens occasionally because in quick cooling procedure, inevitably there is the asymmetric situation in the left and right sides in slab.Originally, all taked: when slab is cast, judge whether to exceed standard, then the concrete size of manual measurement again behind the slab cool to room temperature by the artificial visually examine to the measurement of camber.This method has two bigger shortcomings:
1. during online production, very poor by artificial visually examine's accuracy, the time and cause erroneous judgement, influence to produce;
2. treat that slab cooling back measures, generally need two days cool time, produced a large amount of slabs therebetween, do not note slightly, will produce a large amount of cambers slab that exceeds standard, cause heavy losses, this situation, each steel mill happens occasionally.
Summary of the invention
The object of the present invention is to provide a kind of method of on-line measurement sickle curve of plate blank, utilize the function of laser ranging, during online casting, can measure the sickle curve of plate blank degree under the condition of high temperature accurately, in time grasp the quality situation of online production slab, avoid the generation of great quality accident.
For achieving the above object, technical scheme of the present invention is,
The method of on-line measurement sickle curve of plate blank utilizes laser accurately to measure the characteristics of distance, on the basis of former slab width gage device, the laser that increases in two laser and the former slab width gage is combined, at slab on one side, form 3 range observations, measure the plate bending degree; Laser scans slab limit portion with certain frequency, the slab that records and the distance of laser, the input computing machine, by computer recording and depict slab limit contouring curve, connect two end points of slab then and be straight line L, calculate the each point distance of slab limit portion, and get the camber numerical value of maximal value as slab to this straight line L.
Again, the method of another on-line measurement sickle curve of plate blank of the present invention, utilize laser accurately to measure the characteristics of distance, on the basis of former slab width gage device, the laser that increases in two laser and the former slab width gage is combined, at slab on one side, form 3 range observations, measure the plate bending degree; Laser scans slab limit portion with certain frequency, utilizes laser to be mapped to the reflection ray of slab, and known again slab center line can calculate the distance L of slab limit portion to the slab center line like this to the distance of laser head; After slab arrives last laser, continue to move a segment distance forward, the distance of promptly adjacent two laser begins to describe the slab profile, and calculates camber numerical value; Connect two end points of this section slab, be straight line L1, be vertical line c1 to L1, be first camber numerical value of slab apart from the maximal value max (c1) of slab limit portion by slab limit portion curve; Slab limit portion curve every a unit interval refigure is once once integrated with current slab limit portion curve preceding, forms new slab profile, and recomputates the new camber numerical value of slab; Finish when the monoblock slab moves on roller-way, promptly in computing machine, depict the exterior contour of whole blocks slab, and calculate the camber numerical value of monoblock slab.
Usually, getting the slab two-end-point is horizontal ordinate A, B, ordinate C be on the slab contour curve more arbitrarily.
The camber numerical value C of slab (X, Y)=max (C
y)=max (y).
In addition, the method of another on-line measurement sickle curve of plate blank of the present invention, it is identical with preceding a kind of measuring method, recomputate camber numerical value one time every a unit interval, but it is different with preceding a kind of length measured, new slab curve will abandon the slab section before the aforementioned unit interval and replenish new slab section, and promptly slab is a unit with a scale distance all the time; The camber numerical value that will newly calculate then and precedingly once compare keeps bigger numerical value; Circulation is gone down like this, after the slab afterbody leaves last laser, has just obtained the numerical value max (c2) of the maximum camber of slab scale distance.
Specifically, the method of on-line measurement sickle curve of plate blank, utilize laser accurately to measure the characteristics of distance, on the basis of former slab width gage device, the laser that increases in two laser and the former slab width gage is combined, at slab on one side, form 3 range observations, measure the plate bending degree; Laser scans slab limit portion with certain frequency, utilizes laser to be mapped to the reflection ray of slab, and known again slab center line can calculate the distance L of slab limit portion to the slab center line like this to the distance of laser head; The slab head begins to calculate the interior sickle curve of plate blank numerical value of this section scale distance after crossing scale distance of last laser, does the vertical line that two end points connect straight line, obtains the maximal value c2 apart from this slab limit portion; After a unit interval, refigure slab limit portion curve; New slab curve will abandon the slab section before the aforementioned unit interval and replenish new slab section, and promptly slab is a unit with described scale distance all the time; The camber numerical value that will newly calculate then and precedingly once compare keeps bigger numerical value; Circulation is gone down like this, after the slab afterbody leaves last laser, has just obtained the numerical value max (c2) of the maximum camber of slab scale distance.
Beneficial effect of the present invention:
The present invention passes through the sickle curve of plate blank on-line measurement; can grasp the degree of sickle curve of plate blank in producing in time, exactly; a large amount of camber generation of defects or the unnecessary disorderly closedown avoiding the erroneous judgement of artificial visually examine's camber generation and cause are avoided the generation of great quality accident.
Description of drawings
Fig. 1 is a sickle curve of plate blank instrumentation plan of the present invention;
Fig. 2 is a sickle curve of plate blank measurement mechanism synoptic diagram of the present invention;
Fig. 3 a～Fig. 3 b is the instrumentation plan of one embodiment of the invention.
Embodiment
Referring to Fig. 1, usually, it is horizontal ordinate A, B that the present invention gets the slab two-end-point, ordinate C be on the slab contour curve more arbitrarily.
Referring to Fig. 2, the present invention goes out on the blank roller way 6 to come into operation at the steel continuous casting, and reality has been used 4 laser 1～4, and middle a pair of laser 1,2 is used for the measurement of slab 5 positions and width; Four laser 1～4 all can be described the curve of slab limit portion, compare, integrate the contour pattern that these four curves can obtain slab reality.Four laser 1～4 all are 1m apart from slab 5 center lines, and the middle laser 2 of two laser, 3,4 distances of setting up is 21.5m.The laser sweep frequency was 1 second 500 times, recomputated one time camber numerical value every 0.25 second.
Calculate camber and slab upper fixed ruler distance as every meter peaked two embodiment of camber of whole slab in actual the use, specific as follows:
The speed of slab rollgang is 20m/min, after the laser in the middle of the slab head arrives, begins to measure the slab position.Its principle is to utilize laser to be mapped to the reflection ray of slab, and known again slab center line can calculate the distance L of slab limit portion to the slab center line like this to the distance of laser head.After slab arrives last laser, continue to move 1.5m (distances of adjacent two laser) forward, begin to describe the slab profile, and calculate camber numerical value.Connect two end points of this section slab, be straight line L1, be vertical line c1 to L1, be first camber numerical value of slab apart from the maximal value max (c1) of slab limit portion, referring to Fig. 3 a by slab limit portion curve.
After slab is crossed last laser 1.5m, begin to describe first slab limit contouring curve.It is in alignment to join two endpoints then, does the vertical line of this straight line, finds the maximal value of C1, is the camber numerical value of this section slab.A, b, c, d are the numberings of laser head.
Referring to Fig. 3 b, cross 0.25s, the slab limit contouring curve that refigure is new.At this moment, slab is longer than the summary of describing for the first time.Then by the camber numerical value that obtains new one section slab with quadrat method.Slab limit portion curve every 0.25 second refigure is once once integrated with current slab limit portion curve preceding, forms new slab profile, and recomputates the new camber numerical value of slab.
At last, after slab left last laser, four laser had all been carried out complete " scanning " to slab.Four laser scanning slabs have all drawn the curve La of slab limit portion, Lb, Lc, Ld separately.If a pair of laser is described relatively the whole slab limit curve Lb of portion, Ld are the identical explanation slab operation of shape parallel with center line (otherwise explanation slab operation disalignment can utilize the distance rotation slab that records, and makes it be parallel to center line); The whole slab limit curve La of portion, Lb, Lc that three laser of comparison one side are described, if (otherwise the explanation slab swings phenomenon and presents arc the identical explanation slab of the shape phenomenon that does not swing in service, reality is straight line, can ignore this point on the curve).It defines coordinate shown in Fig. 3 c, and the camber numerical value C of slab (X, Y)=max (Cl
y)=max (y).
Among the figure, Ld is identical with the Lb shape, and distance is different, and La, Lb, Lc overlap.
Scale is identical with the slab section apart from the camber computing method.Key step is: the slab head begins to calculate every meter camber numerical value after crossing 1 meter of last laser, does the vertical line that two end points connect straight lines, obtains the maximal value c2 apart from slab limit portion; Cross 0.25s, refigure slab limit portion curve,
But it is different with embodiment 1 length measured.New slab curve will abandon the slab section before the 0.25s and replenish new slab section, and promptly slab is a unit with 1 meter all the time.The camber numerical value that will newly calculate then compared with the first time, kept bigger numerical value.Circulation is gone down like this, after the slab afterbody leaves last laser, has just obtained the numerical value max (c2) of every meter maximum camber of slab.
If sickle curve of plate blank numerical value has surpassed standard, system will report to the police on picture, thus the camber situation of slab when allowing operating personnel in time grasp online casting, find that camber exceeds standard after, stop casting at once, prevent the appearance of a large amount of waste products.
The present invention is since stainless steel continuous casting machine input is used, and the sickle curve of plate blank ratio that exceeds standard drops to now less than 0.5% by original 2.51%.
In sum, the present invention passes through the sickle curve of plate blank on-line measurement, can grasp the degree of sickle curve of plate blank in producing in time, exactly, avoid inevitably a large amount of generations of sickle curve of plate blank defective in all slab casters productions, avoid the generation of great quality accident.
Claims (5)
1. the method for an on-line measurement sickle curve of plate blank, utilize laser accurately to measure the characteristics of distance, on the basis of former slab width gage device, increase by two laser, combine with the laser in the former slab width gage,, form 3 range observations at slab on one side, measure the plate bending degree; Laser scans slab limit portion with certain frequency, the slab that records and the distance of laser, record is also depicted slab limit contouring curve, connect two end points of slab then and be straight line L, calculate the each point distance of slab limit portion, and get the camber numerical value of maximal value as slab to this straight line L.
2. the method for on-line measurement sickle curve of plate blank as claimed in claim 1 is characterized in that, getting the slab two-end-point is horizontal ordinate A, B, ordinate C be on the slab contour curve more arbitrarily; The camber numerical value C of slab (X, Y)=max (C
y)=max (y).
3. the method for on-line measurement sickle curve of plate blank as claimed in claim 1 is characterized in that, with the distance input computing machine of the slab that records and laser, by computer recording and depict slab limit contouring curve.
4. the method for an on-line measurement sickle curve of plate blank, utilize laser accurately to measure the characteristics of distance, on the basis of former slab width gage device, increase by two laser, combine with the laser in the former slab width gage,, form 3 range observations at slab on one side, measure the plate bending degree; Laser scans slab limit portion with certain frequency, utilizes laser to be mapped to the reflection ray of slab, and known again slab center line can calculate the distance L of slab limit portion to the slab center line like this to the distance of laser head; After slab arrives last laser, continue to move a segment distance forward, the distance of promptly adjacent two laser begins to describe the slab profile, and calculates camber numerical value; Connect two end points of this section slab, be straight line L1, be vertical line c1 to L1, be first camber numerical value of slab apart from the maximal value max (c1) of slab limit portion by slab limit portion curve; Slab limit portion curve every a unit interval refigure is once once integrated with current slab limit portion curve preceding, forms new slab profile, and recomputates the new camber numerical value of slab; Finish when the monoblock slab moves on roller-way, promptly in computing machine, depict the exterior contour of whole blocks slab, and calculate the camber numerical value of monoblock slab.
5. the method for an on-line measurement sickle curve of plate blank, utilize laser accurately to measure the characteristics of distance, on the basis of former slab width gage device, increase by two laser, combine with the laser in the former slab width gage,, form 3 range observations at slab on one side, measure the plate bending degree; Laser scans slab limit portion with certain frequency, utilizes laser to be mapped to the reflection ray of slab, and known again slab center line can calculate the distance L of slab limit portion to the slab center line like this to the distance of laser head; The slab head begins to calculate the interior sickle curve of plate blank numerical value of this section scale distance after crossing scale distance of last laser, does the vertical line that two end points connect straight line, obtains the maximal value c2 apart from this slab limit portion; After a unit interval, refigure slab limit portion curve; New slab curve will abandon the slab section before the aforementioned unit interval and replenish new slab section, and promptly slab is a unit with described scale distance all the time; The camber numerical value that will newly calculate then and precedingly once compare keeps bigger numerical value; Circulation is gone down like this, after the slab afterbody leaves last laser, has just obtained the numerical value max (c2) of the maximum camber of slab scale distance.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101165011A CN100547345C (en) | 2006-09-26 | 2006-09-26 | A kind of method of on-line measurement sickle curve of plate blank |
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|---|---|---|---|
| CNB2006101165011A CN100547345C (en) | 2006-09-26 | 2006-09-26 | A kind of method of on-line measurement sickle curve of plate blank |
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| CN101153794A true CN101153794A (en) | 2008-04-02 |
| CN100547345C CN100547345C (en) | 2009-10-07 |
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Cited By (11)
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| CN103292720A (en) * | 2012-06-29 | 2013-09-11 | 上海中航光电子有限公司 | Method and system for testing substrate deflection |
| CN103302111A (en) * | 2013-07-01 | 2013-09-18 | 莱芜钢铁集团有限公司 | Steel section bending online measurement device and steel section bending online measurement method |
| CN103900519A (en) * | 2012-12-27 | 2014-07-02 | 上海宝钢工业技术服务有限公司 | Online continuous caster outer arc segment row arc measurement method |
| CN105651161A (en) * | 2014-12-01 | 2016-06-08 | Posco公司 | Apparatus and method for measuring camber in hot rolling process |
| CN106984652A (en) * | 2016-01-21 | 2017-07-28 | 宝山钢铁股份有限公司 | The method that finishing stand sideslip is controlled according to breakdown bar camber |
| CN108020191A (en) * | 2016-11-01 | 2018-05-11 | 上海宝钢高强钢加工配送有限公司 | A kind of measuring system and its measuring method of automatic detection steel plate material camber |
| CN108655203A (en) * | 2017-03-31 | 2018-10-16 | 宝山钢铁股份有限公司 | The quick identification of hot-continuous-rolling strip steel camber defect and monitoring method |
| CN109506597A (en) * | 2018-12-04 | 2019-03-22 | 四川金湾电子有限责任公司 | A kind of semiconductor lead frame lateral bending automated detection method and detection system |
| CN113204029A (en) * | 2021-04-19 | 2021-08-03 | 北京科技大学 | Hot-rolled plate blank warpage detection device and method |
| CN114001693A (en) * | 2021-10-22 | 2022-02-01 | 西安宝钢钢材加工配送有限公司 | Automatic detection device and detection method for camber of long plate |
| CN114082792A (en) * | 2021-10-19 | 2022-02-25 | 首钢集团有限公司 | Method for adjusting width of heated plate blank |
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- 2006-09-26 CN CNB2006101165011A patent/CN100547345C/en not_active Expired - Fee Related
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| CN103292720B (en) * | 2012-06-29 | 2016-01-27 | 上海中航光电子有限公司 | substrate deflection test method and system |
| CN103292720A (en) * | 2012-06-29 | 2013-09-11 | 上海中航光电子有限公司 | Method and system for testing substrate deflection |
| CN103900519A (en) * | 2012-12-27 | 2014-07-02 | 上海宝钢工业技术服务有限公司 | Online continuous caster outer arc segment row arc measurement method |
| CN103900519B (en) * | 2012-12-27 | 2018-02-16 | 上海宝钢工业技术服务有限公司 | The On-line Measuring Method of conticaster outer arc roller row radian |
| CN103302111A (en) * | 2013-07-01 | 2013-09-18 | 莱芜钢铁集团有限公司 | Steel section bending online measurement device and steel section bending online measurement method |
| CN103302111B (en) * | 2013-07-01 | 2015-05-27 | 莱芜钢铁集团有限公司 | Steel section bending online measurement device and steel section bending online measurement method |
| CN105651161B (en) * | 2014-12-01 | 2019-04-19 | Posco公司 | Device for measuring camber and its measurement method in hot rolling technology |
| CN105651161A (en) * | 2014-12-01 | 2016-06-08 | Posco公司 | Apparatus and method for measuring camber in hot rolling process |
| CN106984652A (en) * | 2016-01-21 | 2017-07-28 | 宝山钢铁股份有限公司 | The method that finishing stand sideslip is controlled according to breakdown bar camber |
| CN108020191A (en) * | 2016-11-01 | 2018-05-11 | 上海宝钢高强钢加工配送有限公司 | A kind of measuring system and its measuring method of automatic detection steel plate material camber |
| CN108655203A (en) * | 2017-03-31 | 2018-10-16 | 宝山钢铁股份有限公司 | The quick identification of hot-continuous-rolling strip steel camber defect and monitoring method |
| CN108655203B (en) * | 2017-03-31 | 2020-06-23 | 宝山钢铁股份有限公司 | Method for quickly identifying and monitoring camber defect of hot continuous rolling strip steel |
| CN109506597A (en) * | 2018-12-04 | 2019-03-22 | 四川金湾电子有限责任公司 | A kind of semiconductor lead frame lateral bending automated detection method and detection system |
| CN113204029A (en) * | 2021-04-19 | 2021-08-03 | 北京科技大学 | Hot-rolled plate blank warpage detection device and method |
| CN114082792A (en) * | 2021-10-19 | 2022-02-25 | 首钢集团有限公司 | Method for adjusting width of heated plate blank |
| CN114001693A (en) * | 2021-10-22 | 2022-02-01 | 西安宝钢钢材加工配送有限公司 | Automatic detection device and detection method for camber of long plate |
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| CN100547345C (en) | 2009-10-07 |
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