CN103962394B - A kind of online test method of hot-rolling mill roll rolling direction side-play amount - Google Patents
A kind of online test method of hot-rolling mill roll rolling direction side-play amount Download PDFInfo
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- CN103962394B CN103962394B CN201410140077.9A CN201410140077A CN103962394B CN 103962394 B CN103962394 B CN 103962394B CN 201410140077 A CN201410140077 A CN 201410140077A CN 103962394 B CN103962394 B CN 103962394B
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Abstract
A method for hot-rolling mill roll rolling direction side-play amount on-line checkingi, belongs to hot-rolling mill roll detection method technical field, for accurately measuring the side-play amount of roll at the relative memorial archway of rolling direction.Its technical scheme is: using hot-rolling mill memorial archway as object of reference, using the light intensity center of the light-permeable circular hole with memorial archway geo-stationary as memorial archway position feature point, by obtaining the image of memorial archway position feature point with the ccd video camera of roll geo-stationary in the operation of rolling, by compared with demarcation distance, calculate the real-time physical coordinate of memorial archway position feature dot center, thus obtain the side-play amount of the relative memorial archway of roll in rolling direction.Accurately and reliably, for the accurate control of the adjustment of roller system, plate shape provides reliable offset correction data, the raising for yield of steel plate is significant for method simple practical of the present invention, test effect.What the invention solves that long-standing problem produces cannot the difficult problem of Measurement accuracy roll rolling direction side-play amount, has high popularizing value.
Description
Technical field
The present invention relates to the method for a kind of on-line checkingi hot-rolling mill roll in rolling direction side-play amount, belong to hot-rolling mill roll detection method technical field.
Background technology
The roller system of normal four-roller hot-rolling mill generally includes the top backing up roll, top working roll, bottom working roll and the lower support roll that are arranged in order from top to bottom.Top backing up roll and lower support roll two ends are arranged on respective back-up chock respectively, top working roll and bottom working roll two ends are arranged on respective working roll bearing block respectively, back-up chock and working roll bearing block are installed in a framework memorial archway, fill out at clearance position by pad between bearing block and frame, roll and its bearing block geo-stationary in the rolling direction.Under normal operation, roll chock upwards can not have large offseting relative to frame rolling, and has not more allowed roller system to intersect.
But during milling train work, roll chock has larger side-play amount relative to frame in rolling direction, close to 20mm when this side-play amount is maximum, and periodically change along with rolling process.This periodic skew brings certain difficulty for the control of rolling, bearing wear also being made serious, having a strong impact on also bringing the service life of rolled parts.If roller system intersects in Medium and Heavy Plate Rolling, this skew can be caused camber to increase the weight of and be difficult to be eliminated by HAGC roll gap adjustment, and plate shape cannot accurately control, and constrains the raising of yield of steel plate.
At present in actual production process, during milling train work, roll rolling direction shift state never can the method for real―time precision measurment, the shift state of production process central roll system cannot be obtained, cannot adjust for roller system, the accurate control of plate shape provides reliable offset correction data, directly affects production, become a difficult problem for puzzlement hot rolled steel plate quality, never effectively solved.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of online test method of hot-rolling mill roll rolling direction side-play amount, this method accurately can measure the side-play amount of roll at the relative memorial archway of rolling direction, obtain the shift state of production process central roll system, for the accurate control of the adjustment of roller system, plate shape provides reliable offset correction data, the raising for yield of steel plate is significant.
The technical scheme solved the problems of the technologies described above is:
An online test method for hot-rolling mill roll rolling direction side-play amount, it adopts following steps to carry out:
1., using mill housing as object of reference, set one with the light intensity center of the printing opacity circular hole of mill housing geo-stationary as memorial archway position feature point;
2. ccd video camera is fixedly connected with roll, in the operation of rolling, is obtained the image of memorial archway position feature point by ccd video camera;
3. the side of memorial archway position feature point setting demarcate unthreaded hole, determine memorial archway position feature point with demarcate unthreaded hole geometry distance of center circle from;
4. determine the distance between the printing opacity circular hole plane of memorial archway position feature point and ccd video camera camera lens, open the light source after as memorial archway position feature point printing opacity circular hole, open the light source after demarcating unthreaded hole simultaneously;
5. under milling train inactive state, obtain memorial archway position feature point printing opacity circular hole and nominal light hole pattern picture by ccd video camera with photograph frame, and calculate the pixel distance of two hot spots in the image of ccd video camera acquisition;
6. setting-up time-offset coordinates system, under the milling train inactive state obtain ccd video camera, the light intensity center of the hot spot of memorial archway position feature point printing opacity circular hole is as physical coordinates system 0 point, completes the demarcation to memorial archway position feature point printing opacity circular hole physical coordinates point;
7. in the operation of rolling, measure, process in real time the physical coordinates of memorial archway position feature point in every photograph frame of ccd video camera acquisition in real time, gained side-play amount is on the occasion of the side-play amount departing from inactive state upper/lower positions side for roll, and gained side-play amount negative value is the side-play amount that roll departs from inactive state upper/lower positions opposite side.
The online test method of above-mentioned hot-rolling mill roll rolling direction side-play amount, the printing opacity Circularhole diameter size of described memorial archway position feature point is 0.01mm ~ 2mm, printing opacity circular hole is connected with adopting rigid support between mill housing, and printing opacity direction is perpendicular to mill length direction and rolling thickness direction, through light be visible ray.
The online test method of above-mentioned hot-rolling mill roll rolling direction side-play amount, described ccd video camera is connected with roll stiffness, the camera direction of ccd video camera is perpendicular to mill length direction and rolling thickness direction, and relative with the printing opacity circular hole as memorial archway position feature point, the camera of ccd video camera and the distance of printing opacity circular hole are 5cm ~ 200cm.
The online test method of above-mentioned hot-rolling mill roll rolling direction side-play amount, the distance of the printing opacity circular hole of described demarcation unthreaded hole and memorial archway position feature point is 1cm ~ 10cm, the Circularhole diameter demarcating unthreaded hole is 0.01mm ~ 2mm, and printing opacity direction is perpendicular to mill length direction and rolling thickness direction, be visible ray through light.
Usefulness of the present invention is:
The present invention is provided with the light intensity center of the printing opacity circular hole of mill housing geo-stationary as memorial archway position feature point, by obtaining the realtime graphic of memorial archway position feature point with the ccd video camera of roll geo-stationary in the operation of rolling, by calculating the real-time physical coordinate of memorial archway position feature dot center, determine the displacement of camera lens relative to memorial archway position feature point rolling direction, thus obtain the side-play amount of the relative mill housing of roll in rolling direction.The present invention can measure in roll both sides simultaneously, obtains the shift state of production process central roll system, and for the accurate control of the adjustment of roller system, plate shape provides reliable offset correction data, the raising for yield of steel plate is significant.The present invention is skillfully constructed, simple and practical, test effect accurately and reliably, what solve that long-standing problem produces cannot the difficult problem of Measurement accuracy hot-rolling mill roll rolling direction side-play amount, has high popularizing value in the industry.
Accompanying drawing explanation
Fig. 1 is test mode schematic diagram of the present invention;
Fig. 2 is the absolute deviation distribution map of an embodiment;
Fig. 3 is rolling to real offset testing result figure of an embodiment.
In figure, mark is as follows: rolling mill roller bearing seat 1, mill housing 2, ccd video camera 3, printing opacity circular hole 4, demarcation unthreaded hole 5, rigid support 6, IMAQ 7, Computer Analysis process 8, roll 9.
Detailed description of the invention
The present invention is using hot-rolling mill memorial archway as object of reference, using the light intensity center of the light-permeable circular hole with memorial archway geo-stationary as memorial archway position feature point, by obtaining the image of memorial archway position feature point with the ccd video camera of roll geo-stationary in the operation of rolling, by compared with demarcation distance, calculate the real-time physical coordinate of memorial archway position feature dot center, determine the displacement of camera lens relative to memorial archway position feature point rolling direction, thus obtain the side-play amount of the relative memorial archway of roll in rolling direction.
This method takes following steps specifically to implement:
(1) using mill housing 2 as object of reference, set one with the light intensity center of the printing opacity circular hole 4 of mill housing 2 geo-stationary as memorial archway position feature point, printing opacity circular hole 4 diameter as memorial archway position feature point is 0.01mm ~ 2mm, be connected with adopting rigid support 6 between mill housing 2, and connect printing opacity direction perpendicular to mill length direction and rolling thickness direction, through light be visible ray.
(2) ccd video camera 3 is fixedly connected with roll, camera direction is perpendicular to mill length direction and rolling thickness direction, and it is relative with the described printing opacity circular hole 4 as memorial archway position feature point, distance 5cm ~ 200cm, obtains the image of memorial archway position feature point in the operation of rolling by ccd video camera 3.
(3) the side of memorial archway position feature point setting demarcate unthreaded hole 5, determine memorial archway position feature point with demarcate unthreaded hole 5 geometry distance of center circle from.The printing opacity circular hole 4 of the memorial archway position feature point of one embodiment of the present of invention and the distance of center circle of demarcation unthreaded hole 5 are from being 1cm ~ 10cm, and demarcating unthreaded hole 5 Circularhole diameter 0.01mm ~ 2mm, is visible ray through light.
(4) all there is visible light source after printing opacity circular hole 4 and demarcation unthreaded hole 5, open the light source after as memorial archway position feature point printing opacity circular hole 4 during test, open the light source after demarcating unthreaded hole 5 simultaneously.
(5) under milling train inactive state, ccd video camera 3 is adopted to obtain memorial archway position feature point printing opacity circular hole 4 with photograph frame and demarcate unthreaded hole 5 image.And calculate the pixel distance of two hot spots in the image of ccd video camera 3 acquisition.
(6) setting-up time-offset coordinates system, under the milling train inactive state obtained by ccd video camera 3, the light intensity center of memorial archway position feature point hot spot is as physical coordinates system 0 point, complete the demarcation to memorial archway position feature point printing opacity circular hole 4 physical coordinates point, close the light source demarcating unthreaded hole 5.
(7) measure, process in real time the physical coordinates of memorial archway position feature point in every photograph frame of ccd video camera 3 acquisition in the operation of rolling in real time, gained side-play amount is on the occasion of the side-play amount departing from inactive state upper/lower positions side for roll, and gained side-play amount negative value is the side-play amount that roll departs from inactive state upper/lower positions opposite side.
An enforcement case of the present invention is as follows:
On-line checkingi is carried out in certain 350 hot-rolling mill roll side.Being 0.1mm with printing opacity circular hole 4 diameter of memorial archway geo-stationary, being connected with adopting rigid support 6 between mill housing 2, and connect printing opacity direction perpendicular to mill length direction and rolling thickness direction;
Demarcate unthreaded hole 5 Circularhole diameter 0.1mm, and the geometry distance of center circle demarcating unthreaded hole 5 and memorial archway position feature point extraction printing opacity circular hole 4 is from 0.8mm;
Printing opacity circular hole 4 plane and ccd video camera 3 camera distance 10cm, ccd video camera 3 is 1,300,000 pixel black and white industrial cameras, frame per second 15 frames/second.
Ccd video camera 3 is connected with IMAQ 7, Computer Analysis process 8.
The different steel grade hot rolled plate of rolling 6 pieces altogether, the operation of rolling is reversible rolling, is respectively 6 ~ 10 passages.All concentrate within the scope of 0.075mm through stability test absolute deviation amount, through on-line checkingi, roll side is rolled to offseting within the scope of-0.15mm ~ 0.15mm relative to memorial archway, and also has identical movement tendency along with the change of rolling direction.
Accompanying drawing 2 is shown in absolute deviation distribution, and roll and see accompanying drawing 3 to real offset testing result, the X in accompanying drawing 3 is for rolling to side-play amount, and F is corresponding passes power.
Claims (4)
1. an online test method for hot-rolling mill roll rolling direction side-play amount, is characterized in that: it adopts following steps to carry out:
A. using mill housing (2) as object of reference, one is set with the light intensity center of the printing opacity circular hole (4) of mill housing (2) geo-stationary as memorial archway position feature point;
B. ccd video camera (3) is fixedly connected with roll, in the operation of rolling, is obtained the image of memorial archway position feature point by ccd video camera (3);
C. the side of memorial archway position feature point setting demarcate unthreaded hole (5), determine memorial archway position feature point with demarcate unthreaded hole (5) geometry distance of center circle from;
D. determine the distance between printing opacity circular hole (4) plane of memorial archway position feature point and ccd video camera (3) camera lens, open the light source after as memorial archway position feature point printing opacity circular hole (4), open the light source after demarcating unthreaded hole (5) simultaneously;
E., under milling train inactive state, obtain memorial archway position feature point printing opacity circular hole (4) by ccd video camera (3) with photograph frame and demarcate unthreaded hole (5) image, and calculating the pixel distance of two hot spots in the image that ccd video camera (3) obtains;
F. setting-up time-offset coordinates system, under the milling train inactive state obtain ccd video camera (3), the light intensity center of memorial archway position feature point printing opacity circular hole (4) hot spot is as physical coordinates system 0 point, completes the demarcation to memorial archway position feature point printing opacity circular hole (4) physical coordinates point;
G. measure in real time in the operation of rolling, process every photograph frame that ccd video camera (3) obtains in real time in the physical coordinates of memorial archway position feature point, gained side-play amount is on the occasion of the side-play amount departing from inactive state upper/lower positions side for roll, and gained side-play amount negative value is the side-play amount that roll departs from inactive state upper/lower positions opposite side.
2. the online test method of hot-rolling mill roll rolling direction side-play amount according to claim 1, it is characterized in that: printing opacity circular hole (4) diameter of described memorial archway position feature point is 0.01mm ~ 2mm, rigid support (7) is adopted to be connected between printing opacity circular hole (4) with mill housing (2), and printing opacity direction is perpendicular to mill length direction and rolling thickness direction, through light be visible ray.
3. the online test method of hot-rolling mill roll rolling direction side-play amount according to claim 2, it is characterized in that: described ccd video camera (3) is connected with roll stiffness, the camera direction of ccd video camera (3) is perpendicular to mill length direction and rolling thickness direction, and relative with the printing opacity circular hole (4) as memorial archway position feature point, the camera of ccd video camera (3) and the distance of printing opacity circular hole (4) they are 5cm ~ 200cm.
4. the online test method of hot-rolling mill roll rolling direction side-play amount according to claim 3, it is characterized in that: described demarcation unthreaded hole (5) is 1cm ~ 10cm with the distance of the printing opacity circular hole (4) of memorial archway position feature point, the Circularhole diameter demarcating unthreaded hole (5) is 0.01mm ~ 2mm, and printing opacity direction is perpendicular to mill length direction and rolling thickness direction, be visible ray through light.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410140077.9A CN103962394B (en) | 2014-06-10 | 2014-06-10 | A kind of online test method of hot-rolling mill roll rolling direction side-play amount |
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| CN201410140077.9A CN103962394B (en) | 2014-06-10 | 2014-06-10 | A kind of online test method of hot-rolling mill roll rolling direction side-play amount |
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| CN103962394B true CN103962394B (en) | 2015-09-23 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105447817B (en) * | 2015-11-09 | 2018-11-09 | 北京科技大学 | A kind of hot-rolled intermediate billet flat image joining method based on edge contour |
| CN106295010B (en) * | 2016-08-12 | 2019-03-15 | 卓达新材料科技集团威海股份有限公司 | A method of rolling out line production plate |
| CN106500592B (en) * | 2016-09-19 | 2019-01-01 | 北京科技大学 | A kind of roll axis spatial position online test method based on machine vision |
| CN106623437B (en) * | 2016-12-14 | 2018-08-14 | 北京首钢股份有限公司 | A method of reducing rolling mill roll axial float |
| CN108543811A (en) * | 2018-04-10 | 2018-09-18 | 河钢股份有限公司承德分公司 | Hot-rolling mill transmission side movable block Zero positioning device and method |
| DE102018003434A1 (en) | 2018-04-27 | 2019-10-31 | Sms Group Gmbh | Cross rolling mill with hydraulic roller adjustment |
| CN108801165B (en) * | 2018-07-27 | 2020-09-18 | 中国航发沈阳发动机研究所 | Device and method for monitoring and adjusting gap between grates of engine test piece |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE19805602A1 (en) * | 1998-02-12 | 1999-08-26 | Kocks Technik | Method of measuring and setting gauge openings formed by drive and/or non-driven rollers, e.g. for rolling systems for producing rolled goods |
| DE10014813B4 (en) * | 2000-03-27 | 2005-10-06 | Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH | Method and device for positionally winding a rolled hot strip in a coiler |
| CN100529653C (en) * | 2007-02-12 | 2009-08-19 | 西安理工大学 | CCD based strip automatic centering CPC detecting system and detecting method |
| CN102836883B (en) * | 2011-06-23 | 2014-08-20 | 宝山钢铁股份有限公司 | Control method for upward and downward head bending of plate blank |
| CN102357561B (en) * | 2011-08-19 | 2013-04-24 | 北京金自天正智能控制股份有限公司 | Deviation correction control method of photoelectric deviation correction control system on cold rolling production line |
| JP2013075326A (en) * | 2011-09-30 | 2013-04-25 | Jfe Steel Corp | Hot rolling equipment |
| CN103353282B (en) * | 2013-06-09 | 2016-04-06 | 河北工业大学 | The online vision measurement device of hot-strip end shape |
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Granted publication date: 20150923 |