CN106540969B - Compensate the signal correction method of plate shape roller flexure - Google Patents
Compensate the signal correction method of plate shape roller flexure Download PDFInfo
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- CN106540969B CN106540969B CN201610965631.6A CN201610965631A CN106540969B CN 106540969 B CN106540969 B CN 106540969B CN 201610965631 A CN201610965631 A CN 201610965631A CN 106540969 B CN106540969 B CN 106540969B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/02—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring flatness or profile of strips
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- Mechanical Engineering (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Length Measuring Devices With Unspecified Measuring Means (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The present invention discloses a kind of signal correction method for compensating plate shape roller flexure, it is intuitive and easy to understand, and convenient for calculating, the Shape signal accuracy of detection of slave mode plate shape roller can be greatly improved, so as to avoid causing the malfunction of control system since plate shape roller is bent, Strip Shape Control precision is improved.
Description
Technical field
The invention belongs to mechanical equipment of steel rolling automatic measurement fields, are that one kind is suitable for cold-strip steel or other strips are produced
The method being modified during deflection deformation to plate shape measurement signal occurs for the slave mode plate shape measurement roller (plate shape roller) that product use.
Background technology
Cold-strip steel is during flatness detection, and measuring roll is by the live bad working environments such as the big temperature difference, hightension and strong vibration
The influence of factor causes to be mingled with numerous noise signals in original Shape signal, and the feelings of original plate shape signal fluctuation often occur
Condition, particularly with big flakiness ratio ultrathin strip, plate deformationization is apparent, and the slight change of technological parameter may all cause plate shape
Large change.
In many factors for influencing flatness detection signal, the variation of measuring roll amount of deflection is the major influence factors that must take into consideration
One of.In the operation of rolling, radial pressure that plate-shaped sensing roller is applied by strip acts on, by detecting flatness detection in real time
The cross direction profiles of roller radial pressure obtain the online plate shape condition of strip.General slave mode plate shape roller is all in the world at present
What segmented measured, usually there are two types of segmented modes：One kind is fixed width segmented mode；Another kind adds for edge segmentation
Close mode encrypts measuring section in the edge of plate shape measurement roller, and the narrow measuring section width of edge is the wide measuring section width of interlude
Half.
Number of patent application 201210519997.2 is disclosed a kind of Shape signal changed based on plate-shaped sensing roller amount of deflection and missed
Poor compensation method, that takes into account measuring roll dead weights and its suffered radial pressure to cause the amount of deflection of plate-shaped sensing roller to change, it is proposed that
The method compensated to sensor zero point deviation.But the patent is not accounted for after plate shape roller is bent due to mechanical dimension position
Variation influenced caused by Shape signal.Document " open by system error comprehensive compensation technique of strip-mill strip-shape detection device
Hair " (《University On The Mountain Of Swallows's journal》,2009,03:Author 220-223) and the author of the patent are same people, the content of explanation
Unanimously.
Application number 200910073992.X provides a kind of strip-mill strip-shape detection device system error comprehensive compensation side
Method, it is contemplated that the add-in card shape deviation caused by the flexure of measuring roll, but calculate too very complicated.
Document " development of plate profile instrument caliberating device and its research [D] of plate shape standard compensation curve " (《University On The Mountain Of Swallows's journal》,
2013) a large amount of figure is given, is illustrated under the conditions of differential tension and cornerite, the stress uneven distribution of plate shape roller,
But the reasonability of 6 tensile stress matched curves finally provided is worth discussing.
Invention content
In view of the foregoing drawbacks, the technical problems to be solved by the invention are to propose that one kind is intuitive and easy to understand, and convenient for calculating
The signal correction method of slave mode plate shape roller flexure is compensated, by improving Shape signal accuracy of detection, so as to improve Strip Shape Control
Precision avoids causing the malfunction of control system since plate shape roller is bent.
In order to achieve the above objectives, present invention employs following technical solutions：
A kind of signal correction method for compensating plate shape roller flexure, specially：
The unified lateral transmission side number consecutively of operation by measuring section from the rack of plate shape roller is 1,2,3 ..., and N, N are plate
Shape roller measures segment number；According to one array x [i] of measuring section width initialization, i=1~N, value is each measuring section center
To the distance at plate shape roller geometric widths center；
The degree of flexibility and the total tension of strip that plate shape roller is influenced by the hightension of strip and occurred are proportional, with
The width of strip is inversely；It is influenced caused by measured value in order to compensate for flexure, designed deflection-compensated fair curve
Formula is：
In formula (2)：△ F (i) are the correction value of radial load measured value at each measuring section；xiFor the i.e. each surveys of array x [i]
Section center is measured to the distance at plate shape roller geometric widths center；xosIt is several to plate shape roller for the effective measuring section center of fore side steel edge portion
The distance of what widthwise central；xdsDistance for the effective measuring section center of transmission side steel edge portion to plate shape roller geometric widths center；For average correction value；KwFor with the relevant coefficient of width；KtFor the coefficient related with strip tension；I is measures segment number；os
Number for the first effective measuring section of fore side steel edge portion；Ds is the number of the first effective measuring section of transmission side steel edge portion；
Average correction valueCalculation formula is：
In formula (4)：N effectively measures hop count for plate shape；
K in above-mentioned formula (1), (2)w、KtIt is calculated according to current specific operating point by following formula；
In formula (6)：W is operating point strip width；T is operating point strip total tension；Aw、Bw、CwFor the relevant curve of width
Parameter；At、Bt、CtFor the relevant parameter of curve of strip total tension；Aw、Bw、Cw、At、Bt、CtThis six parameters are directed to every plate shape
Roller carries out theoretical calculation and obtains initial value, and choosing typical condition using the method that CN200910073992.X is proposed is calculated, right
Result of calculation is fitted the initial value that can obtain this 6 parameters, and the field application stage can be right if necessary according to actual conditions
These initial values carry out subtle adjustment and improve precision；
In practical plate shape measurement value processing procedure, each measuring section actual measurement radial load subtracts deflection-compensated fair curve
Corresponding correction value, obtains revised radial direction force data, further computing board shape deviation, to improve the observing and controlling of plat control system
Precision.
Beneficial effects of the present invention are：
The method of the present invention is intuitive and easy to understand, and convenient for calculating, the Shape signal detection essence of slave mode plate shape roller can be greatly improved
Degree so as to avoid causing the malfunction of control system since plate shape roller is bent, improves Strip Shape Control precision.
Especially it is worth mentioning that, it is firm due to plate shape roller itself for the plate shape roller of general belt transmission system
Degree is preferable, bend influenced caused by plate shape measurement signal it is smaller.But for slave mode plate shape roller, due to needing to reduce
The rotary inertia of itself necessarily causes the rigidity of plate shape roller itself to be affected, and plate shape roller flexure at this time is to plate shape measurement signal
It will affect greatly, deflection-compensated becomes an indispensable part in Shape signal processing procedure.
Specific embodiment
With reference to embodiment, the present invention is described in detail.
It is (1,2,3 ..., N) by the lateral transmission side number consecutively of the operation of plate shape roller measuring section from rack, N is plate shape roller
Measure segment number.According to one array x [i] of measuring section width initialization, value is each measuring section center to plate shape roller geometry
The distance of widthwise central.
Totally 33 measuring sections, every section of width are 52mm to the plate shape roller that certain skin pass mill group uses, and initialization array x [i] is as follows：
(-0.832、-0.78、-0.728、-0.676、-0.624、-0.572、-0.52、-0.468、-0.416、-0.364、-0.312、-
0.26、-0.208、-0.156、-0.104、-0.052、0、0.052、0.104、0.156、0.208、0.26、0.312、0.364、
0.416、0.468、0.52、0.572、0.624、0.676、0.728、0.78、0.832)。
When judging that a new strip reaches every time, according to the width of the strip received and practical total tension, under
Formula obtains the specific K of strip needsw、KtCoefficient：
Kw=Aw×W2+Bw×W+Cw
Kt=At×T2+Bt×T+Ct
In formula：Aw、Bw、Cw、At、Bt、CtThis six parameters carry out theoretical calculation for every plate shape roller and obtain initial value, and root
It is finely adjusted according to the real data during field adjustable, is known quantity in the formula application stage.The skin pass mill group strip
Width is 1612mm, sets tension as 71kN.It is according to the practical parameter that obtains of above-mentioned formula：
Kw=1.18
Kt=27.28
Learn that the effective measuring section segment number of fore side steel edge portion is 2 according to width calculating, transmission side steel edge portion is effectively surveyed
It is 30 to measure section segment number, i.e.,：
xos=x [2]=- 0.728
xds=x [30]=0.728
According to measuring section center to the distance at plate shape roller geometric widths center, calculate F (i) values of each measuring section and be averaged
Value
In formula：xiFor previously described x [i], i.e., the distance at each measuring section center to plate shape roller geometric widths center；xos
Distance for the effective measuring section center of fore side steel edge portion to plate shape roller geometric widths center；xdsHave for transmission side steel edge portion
Measuring section center is imitated to the distance at plate shape roller geometric widths center；KwFor with the relevant coefficient of width；KtIt is related with strip tension
Coefficient.
The result of calculation of above-mentioned formula is：
F (i) arrays：(0.00、0.00、23.12、19.94、16.99、14.27、11.80、9.56、7.55、5.78、
4.25、2.95、1.89、1.06、0.47、0.12、0.00、0.12、0.47、1.06、1.89、2.95、4.25、5.78、7.55、
9.56、11.80、14.27、16.99、19.94、23.12、0.00、0.00)。
Each measuring section deflection-compensated correction value is calculated according to aforementioned result of calculation：
△ F (i) arrays for (0.00,0.00,14.86,11.68,8.73,6.02,3.54,1.30, -0.71, -2.48, -
4.01、-5.31、-6.37、-7.20、-7.79、-8.14、-8.26、-8.14、-7.79、-7.20、-6.37、-5.31、-
4.01、-2.48、-0.71、1.30、3.54、6.02、8.73、11.68、14.86、0.00、0.00)
Every strip of above procedure only needs to carry out once, and each measuring section deflection-compensated correction value △ F (i) supply after preserving should
Each measurement period of strip uses.Each measurement period after obtaining each measuring section actual measurement radial load, subtracts deflection-compensated
Correction value △ F (i), obtain revised radial direction force data, and further computing board shape deviation makes for plate shape closed loop feedback model
With progress closed loop feedback control, to improve the Measure Precision of plat control system.
Claims (1)
- A kind of 1. signal correction method for compensating plate shape roller flexure, it is characterised in that：The unified lateral transmission side number consecutively of operation by measuring section from the rack of plate shape roller is 1,2,3 ..., and N, N are plate shape roller Measure segment number；According to one array x [i] of measuring section width initialization, i=1~N, value is each measuring section center to plate The distance at shape roller geometric widths center；The degree of flexibility and the total tension of strip that plate shape roller is influenced by the hightension of strip and occurred are proportional, with strip Width inversely；It is influenced caused by measured value in order to compensate for flexure, designed deflection-compensated fair curve formula For：In formula (1)：Δ F (i) is the correction value of radial load measured value at each measuring section；xiIt is each measuring section for array x [i] Center is to the distance at plate shape roller geometric widths center；xosIt is wide to plate shape roller geometry for the effective measuring section center of fore side steel edge portion The distance at degree center；xdsDistance for the effective measuring section center of transmission side steel edge portion to plate shape roller geometric widths center；For Average correction value；KwFor with the relevant coefficient of width；KtFor the coefficient related with strip tension；I is measures segment number；Os is behaviour Make the number of the first effective measuring section of side steel edge portion；Ds is the number of the first effective measuring section of transmission side steel edge portion；Average correction valueCalculation formula is：In formula (2)：N effectively measures hop count for plate shape；K in above-mentioned formula (1), (2)w、KtIt is calculated according to current specific operating point by following formula；In formula (3)：W is operating point strip width；T is operating point strip total tension；Aw、Bw、CwFor the relevant curve ginseng of width Number；At、Bt、CtFor the relevant parameter of curve of strip total tension；Aw、Bw、Cw、At、Bt、CtThis six parameters are directed to every plate shape roller It calculates and obtains initial value；In practical plate shape measurement value processing procedure, each measuring section actual measurement radial load subtracts deflection-compensated fair curve correspondence Correction value obtains revised radial direction force data, and further computing board shape deviation is used for plate shape closed loop feedback model, is carried out Closed loop feedback control.
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| CN112077156B (en) * | 2020-08-20 | 2021-05-14 | 燕山大学 | Method for eliminating deflection interference signals of cold-rolled strip plate-shaped roll |
| CN112620358B (en) * | 2020-11-30 | 2021-08-20 | 燕山大学 | The Elimination Method of Deflection Additional Component of Detecting Signal of Cold Rolled Strip Shape Tester |
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| GB1160112A (en) * | 1965-07-09 | 1969-07-30 | British Aluminium Co Ltd | Improvements in or relating to the Measurement of the Shape and Flatness of Sheet or Strip Material |
| DE4416546C2 (en) * | 1994-05-10 | 2000-05-31 | Siemens Ag | Method for determining the tension distribution of a material strip across its width |
| CN101507977B (en) * | 2009-03-20 | 2012-06-06 | 燕山大学 | System error comprehensive compensation technique of strip-mill strip-shape detection device |
| CN101543843B (en) * | 2009-04-10 | 2011-06-08 | 燕山大学 | Method for establishing plate standard curve based on step-by-step optimization and influencing factor compensation |
| CN101920268B (en) * | 2009-06-09 | 2013-04-03 | 鞍钢股份有限公司 | Processing method for measured value of shape control of cold rolling mill |
| CN101992218B (en) * | 2009-08-25 | 2013-05-01 | 鞍钢股份有限公司 | Correction method for cold-rolled strip steel plate shape control target value |
| CN103028618B (en) * | 2012-12-05 | 2015-03-25 | 燕山大学 | Strip shape signal error compensation method based on strip shape detection roll deflection change |
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