CN106540969A - The signal correction method of compensation plate shape roller flexure - Google Patents

The signal correction method of compensation plate shape roller flexure Download PDF

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Publication number
CN106540969A
CN106540969A CN201610965631.6A CN201610965631A CN106540969A CN 106540969 A CN106540969 A CN 106540969A CN 201610965631 A CN201610965631 A CN 201610965631A CN 106540969 A CN106540969 A CN 106540969A
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plate shape
measuring section
shape roller
center
formula
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CN106540969B (en
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曹忠华
王军生
张岩
秦大伟
侯永刚
刘宝权
宋君
王奎越
宋宝宇
张栋
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Anshan iron and steel research institute
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Anshan iron and steel research institute
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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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  • Engineering & Computer Science (AREA)
  • 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 of compensation plate shape roller flexure, it is visual and understandable, and be easy to calculate, the Shape signal accuracy of detection of slave mode plate shape roller can be greatly improved, so as to avoid the malfunction of control system being caused as plate shape roller bends, improve Strip Shape Control precision.

Description

The signal correction method of compensation plate shape roller flexure
Technical field
The invention belongs to mechanical equipment of steel rolling automatic measurement field, is that one kind is applied to cold-strip steel or other strips are produced There is the method being modified to plate shape measurement signal during deflection deformation in slave mode plate shape measurement roller (plate shape roller) that product are used.
Background technology
, during flatness detection, measuring roll is by the live bad working environments such as the big temperature difference, hightension and strong vibration for cold-strip steel The impact of factor, is mingled with numerous noise signals in causing original Shape signal, Jing often occurs the feelings of original plate shape signal fluctuation Condition, particularly with big flakiness ratio ultrathin strip, its plate shape change is obvious, and the slight change of technological parameter may all cause plate shape Large change.
In many factors for affecting flatness detection signal, the change of measuring roll amount of deflection is the major influence factors that must take into One of.In the operation of rolling, plate-shaped sensing roller is subject to acting on for the radial pressure of strip steel applying, by real-time detection flatness detection The cross direction profiles of roller radial pressure, obtain the online plate shape situation of strip steel.At present general in the world slave mode plate shape roller is all Stagewise measurement, as a rule there are two kinds of segmented modes：A kind of is fixed width segmented mode；It is another kind of to add for edge segmentation Measuring section is encrypted by close mode in the edge of plate shape measurement roller, and the narrow measuring section width of edge is interlude width measuring section width Half.
Number of patent application 201210519997.2 discloses a kind of Shape signal mistake changed based on plate-shaped sensing roller amount of deflection Difference compensation method, that takes into account measuring roll deadweight and its suffered radial pressure causes the amount of deflection of plate-shaped sensing roller to change, it is proposed that The method compensated by sensor zero point deviation.But the patent is not accounted for after plate shape roller bends due to mechanical dimension position Change impact that Shape signal is caused.Document " open by system error comprehensive compensation technique of strip-mill strip-shape detection device Send out " (《University On The Mountain Of Swallows's journal》,2009,03:The author of author 220-223) and the patent is 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 additional plate shape deviation caused due to 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) substantial amounts 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 the 6 tensile stress matched curves for being finally given is worth discussion.
The content of the invention
For drawbacks described above, the technical problem to be solved is to propose that one kind is visual and understandable, and is easy to what is calculated The signal correction method of compensation slave mode plate shape roller flexure, by improving Shape signal accuracy of detection, so as to improve Strip Shape Control Precision, it is to avoid cause the malfunction of control system as plate shape roller bends.
To reach above-mentioned purpose, following technical scheme is present invention employs：
A kind of signal correction method of compensation plate shape roller flexure, specially：
Unified is 1,2,3 from the lateral transmission side number consecutively of operation of frame by the measuring section of plate shape roller ..., and N, N are plate Shape roller measures segment number；According to one array x [i] of measuring section width initialization, i=1～N, its value are each measuring section center To the distance at plate shape roller geometric widths center；
The degree of flexibility that plate shape roller is affected and occurred by the hightension of strip steel is proportional with the total tension of strip steel, with The width of strip steel is inversely；In order to compensate the impact that flexure is caused to measured value, designed deflection-compensated fair curve Formula is：
In formula (2)：△ F (i) is the correction value of radial force measured value at each measuring section；xiIt is each survey for array x [i] Distance of the Liang Duan centers to 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；xdsFor the distance at the effective measuring section center of transmission side steel edge portion to plate shape roller geometric widths center；For average correction value；KwIt is the coefficient related to width；KtIt is the coefficient relevant with strip tension；I is measurement segment number；os For the numbering of the first effective measuring section of fore side steel edge portion；Numberings of the ds for the first effective measuring section of transmission side steel edge portion；
Average correction valueComputing formula is：
In formula (4)：N effectively measures hop count for plate shape；
K in above-mentioned formula (1), (2)w、KtIt is calculated by following formula according to current specific operating point；
In formula (6)：W is operating point strip width；T is operating point strip steel total tension；Aw、Bw、CwFor the related curve of width Parameter；At、Bt、CtFor the related parameter of curve of strip steel 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 the method proposed using CN200910073992.X is chosen typical condition and calculated, right Result of calculation obtains the initial value of this 6 parameters by being fitted, the live application stage can be right when necessary according to practical situation These initial values carry out trickle adjustment and improve precision；
In actual plate shape measurement value processing procedure, each measuring section actual measurement radial force deducts deflection-compensated fair curve Correspondence correction value, obtains revised radial direction force data, further calculates plate shape deviation, to improve the observing and controlling of plat control system Precision.
Beneficial effects of the present invention are：
The inventive method is visual and understandable, and is easy to calculate, and 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 as plate shape roller bends, improves Strip Shape Control precision.
Especially it is worth mentioning that, it is for the plate shape roller of general belt transmission system, firm due to plate shape roller itself Degree is preferable, bends the impact caused to plate shape measurement signal less.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 now plate shape roller is bent to plate shape measurement signal To 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) from the lateral transmission side number consecutively of operation of frame by plate shape roller measuring section, N is plate shape roller Measurement segment number.According to one array x [i] of measuring section width initialization, its value is each measuring section center to plate shape roller geometry The distance of widthwise central.
The plate shape roller that certain skin pass mill group is adopted totally 33 measuring sections, every section of width is 52mm, 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 steel is reached every time, according to the width and actual total tension of the strip steel for receiving, by under Formula obtains the specific K that the strip steel 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 steel Width is 1612mm, sets tension force as 71kN.According to the parameter of the actual acquisition of above-mentioned formula it is：
Kw=1.18
Kt=27.28
It is 2 according to the effective measuring section segment number of width calculation learning operation side steel edge portion, transmission side steel edge portion is effectively surveyed Amount section segment number is 30, i.e.,：
xos=x [2]=- 0.728
xds=x [30]=0.728
According to the distance at measuring section center to plate shape roller geometric widths center, F (i) values of each measuring section and average are calculated Value
In formula：xiFor previously described x [i], i.e. distance of each measuring section center to plate shape roller geometric widths center；xos For the distance at 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 Distance of the effect measuring section center to plate shape roller geometric widths center；KwIt is the coefficient related to width；KtIt is relevant 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 steel of above procedure only needs to carry out once, and each measuring section deflection-compensated correction value △ F (i) is supplied after preserving should Each measure the cycle of bar strip steel is used.Each measure the cycle, after obtaining each measuring section actual measurement radial force, deducts deflection-compensated Correction value △ F (i), obtains revised radial direction force data, further calculates plate shape deviation, makes for plate shape closed loop feedback model With carrying out closed loop feedback control, to improve the Measure Precision of plat control system.

Claims (1)

1. a kind of signal correction method that compensation plate shape roller bends, it is characterised in that：
Unified is 1,2,3 from the lateral transmission side number consecutively of operation of frame by the measuring section of plate shape roller ..., and N, N are plate shape roller Measurement segment number；According to one array x [i] of measuring section width initialization, i=1～N, its value are each measuring section center to plate The distance at shape roller geometric widths center；
The degree of flexibility that plate shape roller is affected and occurred by the hightension of strip steel is proportional with the total tension of strip steel, with strip steel Width inversely；In order to compensate the impact that flexure is caused to measured value, designed deflection-compensated fair curve formula For：
Δ F ( i ) = K t x i 2 K w ( ( x o s - x d s ) / 2 ) 2 - F ‾ ( i = o s ~ d s ) - - - ( 1 )
In formula (2)：Δ F (i) is the correction value of radial force measured value at each measuring section；xiIt is each measuring section for array x [i] Distance of the center to plate shape roller geometric widths center；xosIt is the effective measuring section center of fore side steel edge portion to plate shape roller geometry width The distance at degree center；xdsFor the distance at the effective measuring section center of transmission side steel edge portion to plate shape roller geometric widths center；For Average correction value；KwIt is the coefficient related to width；KtIt is the coefficient relevant with strip tension；I is measurement segment number；Os is behaviour Make the numbering of the first effective measuring section of side steel edge portion；Numberings of the ds for the first effective measuring section of transmission side steel edge portion；
Average correction valueComputing formula is：
F ‾ = 1 n Σ i = o s d s K t x i 2 K w ( ( x o s - x d s ) / 2 ) 2 ( i = o s ~ d s ) - - - ( 3 )
In formula (4)：N effectively measures hop count for plate shape；
K in above-mentioned formula (1), (2)w、KtIt is calculated by following formula according to current specific operating point；
K w = A w × W 2 + B w × W + C w K t = A t × T 2 + B t × T + C t - - - ( 5 )
In formula (6)：W is operating point strip width；T is operating point strip steel total tension；Aw、Bw、CwFor the related curve ginseng of width Number；At、Bt、CtFor the related parameter of curve of strip steel total tension；Aw、Bw、Cw、At、Bt、CtThis six parameters are directed to every plate shape roller Calculate and obtain initial value；
In actual plate shape measurement value processing procedure, each measuring section actual measurement radial force deducts deflection-compensated fair curve correspondence Correction value, obtains revised radial direction force data, further calculates plate shape deviation, uses for plate shape closed loop feedback model, carry out Closed loop feedback control.
CN201610965631.6A 2016-10-28 2016-10-28 Compensate the signal correction method of plate shape roller flexure Active CN106540969B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112077156A (en) * 2020-08-20 2020-12-15 燕山大学 Method for eliminating deflection interference signals of cold-rolled strip plate-shaped roll
CN112620358A (en) * 2020-11-30 2021-04-09 燕山大学 Method for eliminating deflection additional component of detection signal of cold-rolled strip shape meter

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499306A (en) * 1965-07-09 1970-03-10 British Aluminium Co Ltd Measurement of the shape and flatness of sheet or strip material
JPH0854303A (en) * 1994-05-10 1996-02-27 Siemens Ag Property-distribution determination method in widthwise direction of material belt
CN101507977A (en) * 2009-03-20 2009-08-19 燕山大学 System error comprehensive compensation technique of strip-mill strip-shape detection device
CN101543843A (en) * 2009-04-10 2009-09-30 燕山大学 Method for establishing plate standard curve based on step-by-step optimization and influencing factor compensation
CN101920268A (en) * 2009-06-09 2010-12-22 鞍钢股份有限公司 Method for processing measured value for controlling shape of plates in cold-rolling mill
CN101992218A (en) * 2009-08-25 2011-03-30 鞍钢股份有限公司 Method for correcting cold-rolled strip steel shape control target value
CN103028618A (en) * 2012-12-05 2013-04-10 燕山大学 Strip shape signal error compensation method based on strip shape detection roll deflection change

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3499306A (en) * 1965-07-09 1970-03-10 British Aluminium Co Ltd Measurement of the shape and flatness of sheet or strip material
JPH0854303A (en) * 1994-05-10 1996-02-27 Siemens Ag Property-distribution determination method in widthwise direction of material belt
CN101507977A (en) * 2009-03-20 2009-08-19 燕山大学 System error comprehensive compensation technique of strip-mill strip-shape detection device
CN101543843A (en) * 2009-04-10 2009-09-30 燕山大学 Method for establishing plate standard curve based on step-by-step optimization and influencing factor compensation
CN101920268A (en) * 2009-06-09 2010-12-22 鞍钢股份有限公司 Method for processing measured value for controlling shape of plates in cold-rolling mill
CN101992218A (en) * 2009-08-25 2011-03-30 鞍钢股份有限公司 Method for correcting cold-rolled strip steel shape control target value
CN103028618A (en) * 2012-12-05 2013-04-10 燕山大学 Strip shape signal error compensation method based on strip shape detection roll deflection change

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112077156A (en) * 2020-08-20 2020-12-15 燕山大学 Method for eliminating deflection interference signals of cold-rolled strip plate-shaped roll
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
CN112620358A (en) * 2020-11-30 2021-04-09 燕山大学 Method for eliminating deflection additional component of detection signal of cold-rolled strip shape meter
CN112620358B (en) * 2020-11-30 2021-08-20 燕山大学 Method for eliminating deflection additional component of detection signal of cold-rolled strip shape meter

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