CN107127218B - Method for determining width and deviation of strip steel according to radial force measured by plate-shaped roller - Google Patents
Method for determining width and deviation of strip steel according to radial force measured by plate-shaped roller Download PDFInfo
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- CN107127218B CN107127218B CN201610113436.0A CN201610113436A CN107127218B CN 107127218 B CN107127218 B CN 107127218B CN 201610113436 A CN201610113436 A CN 201610113436A CN 107127218 B CN107127218 B CN 107127218B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 35
- 239000010959 steel Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005259 measurement Methods 0.000 claims abstract description 130
- 230000005540 biological transmission Effects 0.000 claims abstract description 25
- 241001269238 Data Species 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 238000005097 cold rolling Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000003672 processing method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
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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
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Abstract
The invention relates to a method for determining the width of strip steel and the deviation of the strip steel according to the radial force measured by a plate-shaped roller, wherein the plate-shaped measuring roller adopts a fixed width subsection mode and an edge subsection encryption mode for measurement, the measurement sections of the plate-shaped measuring roller are numbered in sequence from the operation side to the transmission side of a frame, whether the measurement sections are covering initial measurement sections or not is judged, then quadratic polynomial curve fitting is carried out, the width coverage rate of the measurement sections is solved, and further the distance between the edge of the strip steel at the operation side and the outer edge of the first measurement section at the operation side and the distance between the edge of the strip steel at the transmission side and the outer edge of the first measurement section at the; and then the actual width of the strip steel and the deviation of the strip steel are obtained. The advantages are that: the shape misadjustment caused by inaccurate strip steel width is avoided, the robustness of the shape control system is improved, and the application range of the shape control system is expanded.
Description
Technical field
The invention belongs to cold-strip steel control technology field more particularly to a kind of band is determined according to the surveyed radial load of plate shape roller
The method of steel width and strip running deviation amount can not determine that plate is wide and strip is run suitable for cold-rolled strip steel shape control system
The processing of plate shape measurement value signal when deviator.
Background technology
Cold rolling technology is one of highest link of steel rolling field technology requirement, and cold rolled sheet shape control technology and control system
It is technology contents most complicated in cold rolling technology field.Raising with user to cold-rolled products quality requirement, especially for
The industries such as superior automobile and the manufacture of high-end IT product, cold-rolled strip steel shape quality had become the major technique of examination belt steel product already
One of index.
In order to roll out the cold-rolled steel strip products of high-quality, it is widely used in modern cold rolling enterprise production process advanced
Plate shape closed-loop feedback control system.It is exactly Plate Profile Measuring System in the most key part of plate shape closed-loop feedback control system,
The stability of measuring device and the precision of measuring signal directly influence the effect of cold-rolled strip steel shape control.Plate Profile Measuring System
Form there are many various, be broadly divided into contactless and contact Plate Profile Measuring System.Current cold rolling manufacturer in the world
The use of more Plate Profile Measuring System is contact plate shape measurement roller.
For most of cold continuous rolling production line, due to being provided with many places automatic centring device in all fronts, and upper
It has carried out accurate strip developed width before material to measure, basic automation systems can give plate shape closed-loop feedback control system to provide
More accurate strip width and strip running deviation amount data.Plat control system is realized accordingly repaiies steel edge portion measurement data
Positive processing, completes online high-precision shape control function.
But for Some Domestic single-stand cold-rolling machine, due to equipment design defect and maintenance levels, sometimes
It will appear the strip width of offer and the case where practical strip width is not inconsistent and can not provide accurate strip running deviation amount.This
In the case of, if operating personnel, without finding and intervening manually in time, plate shape closed-loop control system will be wide according to the strip of mistake
Degree and running deviation value carry out the edge measured value amendment of strip, and carry out closed loop feedback control accordingly, cause plate shape regulating and controlling mechanism
Malfunction influences final Strip Shape Control effect.
Application number：200910011921.7 disclosing《A kind of method for processing measured value for controlling shape of plates in cold-rolling mill》Patent,
The processing method considers strip running deviation in cold-rolled process and measures the factors such as roller center position offset.The processing method is logical simultaneously
It crosses to the calculating of plate shape measurement roller border region coverage rate, the calculating of sensor diameter coverage rate and the calculating of sensor area coverage rate etc.
Integrated treatment, obtains the precise measurements of plate shape measurement roller edge radial load in cold-rolled process, which is cold-reduced sheet
Shape control provides premise.The plate shape virtual condition that plat control system is obtained using the measured value processing method can improve plate
Shape control effect, and then improve cold-rolled strip steel shape quality.But the use of the premise of the patented method is to obtain accurately online
Strip width, strip running deviation amount and measurement roller center position offset, if these data can not be obtained in advance, specially using this
Sharp method may cause the plate shape regulation and control action of mistake to influence Strip Shape Control effect.
Mechanical engineering journal, 2 months the 4th phases in 2011, the 47th curly hair table《The research of cold rolled sheet shape measured value computation model
With application》, plate shape is surveyed to calculate edge strip using strip width, strip running deviation amount and measurement roller center position offset
Measure the area covering of element than calculating actual measuring cell coverage rate, to linearly be corrected to template measured value, equally
If how to be corrected in the case of not mentioning strip width and running deviation value inaccuracy.
Invention content
In order to overcome the deficiencies of the prior art, band is determined according to the surveyed radial load of plate shape roller the object of the present invention is to provide a kind of
The method of steel width and strip running deviation amount, it is inaccurate in the strip width that unit provides, and strip center offset can not be provided
In the case of, it is effectively prevented from because strip width is inaccurate and strip running deviation amount does not know and plate shape regulating and controlling mechanism mistake occurs and move
The case where making improves the robustness and the scope of application of plat control system.
To achieve the above object, the invention is realized by the following technical scheme：
According to the method that the surveyed radial load of plate shape measurement roller determines strip width and strip running deviation amount, include the following steps：
1) plate shape measurement roller is measured using segmented, and segmented mode is two kinds：One kind is fixed width segmented mode；It is another
Kind is that edge is segmented cipher mode, encrypts measuring section in the edge of plate shape measurement roller, and the narrow measuring section width of edge is interlude
The half of wide measuring section width；
By the measuring section of plate shape measurement roller from the operation side of rack to transmission side number consecutively be (1,2,3 ..., N)：
When using fixed width segmented mode：Number is corresponded with measuring section, N is measuring section hop count；
When being segmented cipher mode using edge, wide measuring section is distributed to two numbers, narrow measuring section distributes a number,
It is so each numbered after number and corresponds to identical measuring section width, N is that wide measuring section hop count multiplies 2 plus narrow measuring section hop count；
When each coiled strip steel obtains the surveyed radial load measured data of first part of effective plate shape measurement roller, it is assumed that strip width
All measuring sections are covered, all measuring section radial load measured datas are corresponding with the segment number of each measuring section；Radial load surveys number
After corresponding with number, number is (1,2,3 ..., N), and corresponding radial load measured data is (rf1,rf2,rf3,…,
rfN)；
Judge whether the radial load measured data of each measuring section is more than successively to strip center since fore side to preset
Minimum threshold, the minimum threshold be field adjustable after specifically determined according to plate shape measurement roller hardware, value range：0~20N；
When there is first measured value for being more than default minimum threshold, then the measuring section is fore side covering starting measuring section, segment number note
Record is n, which is rfn；Similarly from transmission side judges to obtain transmission side covering to strip center
Beginning measuring section, segment number are recorded as m, which is rfm；
2) measuring section is taken to survey number with radial load towards adjacent corresponding number of j practical measuring section of strip center inside
Quadratic polynomial curve matching is carried out according to for initial data, the initial data used in fit procedure is according to plate shape measurement roller point
The difference of section and its strip coverage condition, there is following 3 kinds of situations：
1. plate shape measurement roller is fixed width segmented mode plate shape measurement roller, the measuring section and its inside j that segment number is n are real
Border measuring section is all wide measuring section or is all narrow measuring section；Or plate shape measurement roller is that edge is segmented cipher mode plate shape measurement roller,
And the measuring section that segment number is n is narrow measuring section, the j practical measuring section in inside is also all narrow measuring section；At this point, starting measuring section
The practical measuring section of n and inside j is all identical width, and the j practical measuring section in inside has j number, respectively (n+1, n+
2 ..., n+j), it is the corresponding radial load measured data of j practical measuring section for the radial load measured data that is fitted
(rfn+1,rfn+2,…,rfn+j)；
2. plate shape measurement roller, which is edge, is segmented cipher mode plate shape measurement roller, and the measuring section that segment number is n is narrow measuring section,
It is not all narrow measuring section in its j practical measuring section in inside, wherein there are k wide measuring sections, then this j practical measuring section is assigned
J+k number, respectively (n+1, n+2 ..., n+j, n+j+1 ..., n+j+k), for the radial load measured data being fitted
For the corresponding j+k radial load measured data (rf of this j practical measuring sectionn+1,rfn+2,…,rfn+j,rfn+j+1,…,
rfn+j+k)；
3. plate shape measurement roller, which is edge, is segmented cipher mode plate shape measurement roller, and the measuring section that segment number is n is wide measuring section,
Its j practical measuring section in inside is also wide measuring section entirely, then this j practical measuring section corresponds to j*2 number, respectively (n+
2, n+3 ..., n+j*2), the radial force data for being fitted is surveyed practical radial load (rf by this j practical measuring sectionn+2,
rfn+3,…,rfn+j*2)；
3) when being fitted, measurement segment number is X-axis, and corresponding radial load measured data is Y-axis, uses quadratic polynomial function
Corresponding quadratic polynomial coefficient (a, b, c), the quadratic polynomial curvilinear function fitted are acquired using least square method：
RFx=ax2+bx+c (1)
In formula (1), x is starting measuring section and its corresponding number of the practical measuring section in inside j, RFxIt is corresponding to number
The radial load match value of measuring section；The measuring section match value RF that segment number is n is acquired using formula (1)n, match value RFnWith the measurement
The radial load measured data that section measures when completely covering is approximate；
The width coverage rate of the measuring section：
γn=f (rfn,RFn) (2)
In formula (2), function f (rfn,RFn) concrete form it is related to sensor, working sensor is in linear zone, sensor
When not being completely covered, pass through rfn、RFnPercentage area coverage is acquired, reconvert is at measuring section width coverage rate；
Similarly, the width coverage rate γ of the capped measuring section m of transmission side first is acquiredm；
4) the width coverage rate γ of the capped measuring section n of fore side first is obtainednIt is capped with transmission side first
Measuring section m width coverage rate γm, band steel edge and fore side first in fore side are asked respectively by following 5 kinds of situations
The distance w of a measuring section outer edgen, first measuring section outer edge distance w of transmission side band steel edge and fore sidem：
1. plate shape measurement roller is fixed width segmented mode plate shape measurement roller：
wn=(n- γn)×Widthwide
wm=(m-1+ γm)×Widthwide (3)
2. plate shape measurement roller, which is edge, is segmented cipher mode plate shape measurement roller, and the measuring section that segment number is n, m is narrow survey
Measure section：
wn=(n- γn)×Widthnarrow
wm=(m-1+ γm)×Widthnarrow (4)
3. plate shape measurement roller, which is edge, is segmented cipher mode plate shape measurement roller, and the measuring section that segment number is n is wide measuring section,
The measuring section that segment number is m is narrow measuring section：
wn=(n+1) × Widthnarrow-γn×Widthwide
wm=(m-1+ γm)×Widthnarrow (5)
4. plate shape measurement roller, which is edge, is segmented cipher mode plate shape measurement roller, and the measuring section that segment number is n is narrow measuring section,
The measuring section that segment number is m is wide measuring section：
wn=(n- γn)×Widthnarrow
wm=(m-2) × Widthnarrow+γm×Widthwide (6)
5. plate shape measurement roller, which is edge, is segmented cipher mode plate shape measurement roller, and the measuring section that segment number is n, m is wide survey
Measure section：
wn=(n+1) × Widthnarrow-γn×Widthwide
wm=(m-2) × Widthnarrow+γm×Widthwide (7)
In formula (3)~(7)：WidthwideFor the width of wide measurement zone, WidthnarrowFor the width of narrow measurement zone；
5) the developed width W of strip is soughtstripAnd strip running deviation amount Devstrip：
Plate shape measurement roller is fixed width segmented mode plate shape measurement roller：
Wstrip=wm-wn；
Devstrip=N × Widthwide/2-(wm+wn)/2；
Plate shape measurement roller is that edge is segmented cipher mode plate shape measurement roller：
Wstrip=wm-wn；
Devstrip=N × Widthnarrow/2-(wm+wn)/2。
Will be in the segment number corresponding process of all measuring section radial load measured datas and each measuring section in step 1)：
Fixed width segmented mode plate shape measurement roller is distributed correspondingly；
Edge is segmented cipher mode plate shape measurement roller, divides radial load measured data is corresponding with measuring section when actual treatment
Match；When the band steel band tension of theoretically perfect tray shape is covered on plate shape measurement roller, if the radial load measured data of wide measuring section is narrow
The radial load measured data of measuring section is double, then two segment numbers that wide measuring section is distributed distribute radial load measured data respectively
Half；If the radial load measured data of wide measuring section and narrow measuring section is equal in magnitude, two segment numbers of wide measuring section are all
Take radial load measured data size.
Compared with prior art, the beneficial effects of the invention are as follows：
It is uncertain in strip width inaccuracy and running deviation value, band is determined by the radial load measured by plate shape roller
Steel width and strip running deviation amount；The strip width that can be used present invention verification basic automation systems to provide in plat control system
And whether strip running deviation amount accurate rationally, if it find that the basic automatization data provided and the data that the Fitting Calculation goes out have compared with
Large deviation then carries out the determination of aim curve using the data that this method acquires, to avoid leading because strip width is inaccurate
The plate shape mistuning of cause.Therefore this method can improve the robustness of plat control system and expand the suitable of plat control system conscientiously
Use range.
Description of the drawings
Fig. 1 is quartic polynomial matched curve.
Fig. 2 is 5 quadratic polynomial matched curves of fore side.
Fig. 3 is 5 quadratic polynomial matched curves of transmission side.
Specific implementation mode
The present invention is described in detail with reference to the accompanying drawings of the specification, it should be noted that the implementation of the present invention is unlimited
In the following embodiments and the accompanying drawings.
According to the method that the surveyed radial load of plate shape roller determines strip width and strip running deviation amount, include the following steps：
1) plate shape measurement roller is measured using segmented, and segmented mode is two kinds：One kind is fixed width segmented mode；It is another
Kind is that edge is segmented cipher mode, encrypts measuring section in the edge of plate shape measurement roller, and the narrow measuring section width of edge is interlude
The half of wide measuring section width；
By the measuring section of plate shape measurement roller from the operation side of rack to transmission side number consecutively be (1,2,3 ..., N)：
When using fixed width segmented mode：Number is corresponded with measuring section, N is measuring section hop count；
When being segmented cipher mode using edge, wide measuring section is distributed to two numbers, narrow measuring section distributes a number,
It is so each numbered after number and corresponds to identical measuring section width, N is that wide measuring section hop count multiplies 2 plus narrow measuring section hop count；
When each coiled strip steel obtains the surveyed radial load measured data of first part of effective plate shape measurement roller, it is assumed that strip width
All measuring sections are covered, all measuring section radial load measured datas are corresponding with the segment number of each measuring section；In the process：
Fixed width segmented mode plate shape measurement roller is distributed correspondingly；
Edge is segmented cipher mode plate shape measurement roller, divides radial load measured data is corresponding with measuring section when actual treatment
Match；When the band steel band tension of theoretically perfect tray shape is covered on plate shape measurement roller, if the radial load measured data of wide measuring section is narrow
The radial load measured data of measuring section is double, then two segment numbers that wide measuring section is distributed distribute radial load measured data respectively
Half；If the radial load measured data of wide measuring section and narrow measuring section is equal in magnitude, two segment numbers of wide measuring section are all
Take radial load measured data size.
After radial load measured data is corresponding with number, number is (1,2,3 ..., N), and corresponding radial load surveys number
According to for (rf1,rf2,rf3,…,rfN)；
Judge whether the radial load measured data of each measuring section is more than successively to strip center since fore side to preset
Minimum threshold, the minimum threshold be field adjustable after specifically determined according to plate shape measurement roller hardware, value range：0~20N；
When there is first measured value for being more than default minimum threshold, then the measuring section is fore side covering starting measuring section, segment number note
Record is n, which is rfn；Similarly from transmission side judges to obtain transmission side covering to strip center
Beginning measuring section, segment number are recorded as m, which is rfm；
2) measuring section is taken to survey number with radial load towards adjacent corresponding number of j practical measuring section of strip center inside
Quadratic polynomial curve matching is carried out according to for initial data, the initial data used in fit procedure is according to plate shape measurement roller point
The difference of section and its strip coverage condition, there is following 3 kinds of situations：
1. plate shape measurement roller is fixed width segmented mode plate shape measurement roller, the measuring section and its inside j that segment number is n are real
Border measuring section is all wide measuring section or is all narrow measuring section；Or plate shape measurement roller is that edge is segmented cipher mode plate shape measurement roller,
And the measuring section that segment number is n is narrow measuring section, the j practical measuring section in inside is also all narrow measuring section；At this point, starting measuring section
The practical measuring section of n and inside j is all identical width, and the j practical measuring section in inside has j number, respectively (n+1, n+
2 ..., n+j), it is the corresponding radial load measured data of j practical measuring section for the radial load measured data that is fitted
(rfn+1,rfn+2,…,rfn+j)；
2. plate shape measurement roller, which is edge, is segmented cipher mode plate shape measurement roller, and the measuring section that segment number is n is narrow measuring section,
It is not all narrow measuring section in its j practical measuring section in inside, wherein there are k wide measuring sections, then this j practical measuring section is assigned
J+k number, respectively (n+1, n+2 ..., n+j, n+j+1 ..., n+j+k), for the radial load measured data being fitted
For the corresponding j+k radial load measured data (rf of this j practical measuring sectionn+1,rfn+2,…,rfn+j,rfn+j+1,…,
rfn+j+k)；
3. plate shape measurement roller, which is edge, is segmented cipher mode plate shape measurement roller, and the measuring section that segment number is n is wide measuring section,
Its j practical measuring section in inside is also wide measuring section entirely, then this j practical measuring section corresponds to j*2 number, respectively (n+
2, n+3 ..., n+j*2), the radial force data for being fitted is surveyed practical radial load (rf by this j practical measuring sectionn+2,
rfn+3,…,rfn+j*2)；
3) when being fitted, measurement segment number is X-axis, and corresponding radial load measured data is Y-axis, uses quadratic polynomial function
Corresponding quadratic polynomial coefficient (a, b, c), the quadratic polynomial curvilinear function fitted are acquired using least square method：
RFx=ax2+bx+c (1)
In formula (1), x is starting measuring section and its corresponding number of the practical measuring section in inside j, RFxIt is corresponding to number
The radial load match value of measuring section；The measuring section match value RF that segment number is n is acquired using formula (1)n, match value RFnWith the measurement
The radial load measured data that section measures when completely covering is approximate；
The width coverage rate of the measuring section：
γn=f (rfn,RFn) (2)
In formula (2), function f (rfn,RFn) concrete form it is related to sensor, working sensor is in linear zone, sensor
When not being completely covered, pass through rfn、RFnPercentage area coverage is acquired, reconvert is at measuring section width coverage rate (when use side
Shape sensor need not then be converted)；
Similarly, the width coverage rate γ of the capped measuring section m of transmission side first is acquiredm；
4) the width coverage rate γ of the capped measuring section n of fore side first is obtainednIt is capped with transmission side first
Measuring section m width coverage rate γm, band steel edge and fore side first in fore side are asked respectively by following 5 kinds of situations
The distance w of a measuring section outer edgen, first measuring section outer edge distance w of transmission side band steel edge and fore sidem：
1. plate shape measurement roller is fixed width segmented mode plate shape measurement roller：
wn=(n- γn)×Widthwide
wm=(m-1+ γm)×Widthwide (3)
2. plate shape measurement roller, which is edge, is segmented cipher mode plate shape measurement roller, and the measuring section that segment number is n, m is narrow survey
Measure section：
wn=(n- γn)×Widthnarrow
wm=(m-1+ γm)×Widthnarrow (4)
3. plate shape measurement roller, which is edge, is segmented cipher mode plate shape measurement roller, and the measuring section that segment number is n is wide measuring section,
The measuring section that segment number is m is narrow measuring section：
wn=(n+1) × Widthnarrow-γn×Widthwide
wm=(m-1+ γm)×Widthnarrow (5)
4. plate shape measurement roller, which is edge, is segmented cipher mode plate shape measurement roller, and the measuring section that segment number is n is narrow measuring section,
The measuring section that segment number is m is wide measuring section：
wn=(n- γn)×Widthnarrow
wm=(m-2) × Widthnarrow+γm×Widthwide (6)
5. plate shape measurement roller, which is edge, is segmented cipher mode plate shape measurement roller, and the measuring section that segment number is n, m is wide survey
Measure section：
wn=(n+1) × Widthnarrow-γn×Widthwide
wm=(m-2) × Widthnarrow+γm×Widthwide (7)
In formula (3)~(7)：WidthwideFor the width of wide measurement zone, WidthnarrowFor the width of narrow measurement zone；
5) the developed width W of strip is soughtstripAnd strip running deviation amount Devstrip：
Plate shape measurement roller is fixed width segmented mode plate shape measurement roller：
Wstrip=wm-wn；
Devstrip=N × Widthwide/2-(wm+wn)/2；
Plate shape measurement roller is that edge is segmented cipher mode plate shape measurement roller：
Wstrip=wm-wn；
Devstrip=N × Widthnarrow/2-(wm+wn)/2。
Embodiment：
Whole roller insert piezomagnetic plate shape measurement roller is used in 1780 line planisher plate shape transformation project of cold rolling, realizes that plate shape exists
The function of line detection, provides initial data for plate shape closed-loop control, meets the application demand of plate shape closed-loop control.The skin pass mill group
When scrap build due to limited space, lack strip automatic centring device, it occur frequently that the sideslip of the big distance of strip is existing
As simultaneously because strip steel at entry surveys the failure of wide device, the strip width of strip developed width and system record also occurs often
Not the phenomenon that not being inconsistent.
Plate shape measurement roll structure uses whole roller block insert type structure, has 33 wide measurements along measuring roll axial directional distribution
Area is 52mm per sector width, and along the circumferential direction 180 degree face is equipped with a pair of of elastomer to each detection unit, and two performances are most
Piezomagnetic sensor that may be consistent is loaded in elastomer respectively.The connection type of sensor is：By two piezo-magnetic sensors
For primary side with being in series, secondary side reverse phase series connection forms differential output circuit.The signal that this connection can get higher sensitivity is defeated
Go out, and the influence that precompression exports piezomagnetic sensor can be eliminated, can also reduce due to temperature change and centrifugal force
The adverse effect that effect etc. generates output signal.
Due to using fixed width segmented mode plate shape measurement roller, fore side of the measuring section from rack in system
It is (1,2,3 ... ..., 33) to transmission side number consecutively.The smallest radial force threshold determined after field adjustable is 10N.
The first part of effective radial load measured value obtained after certain coiled strip steel threading is as shown in the table：
According to the content in technical solution, the radial load of each measuring section is judged successively to strip center since fore side
Whether measured value is more than preset minimum threshold.It was found that it is 250N the measured value that first is more than default minimum threshold occur, then
The measuring section is considered that fore side covering starting measuring section, segment number are recorded as n=7, rf7=250.Similarly from side is driven to strip
Center judges that obtaining transmission side covering originates measuring section, and segment number is recorded as m=26, rf26=186.
In view of the controller computing capability that system uses is limited, j=5 is taken, carries out quadratic polynomial curve matching.
Operation side portion section is fitted first, takes the measuring section that segment number is 7 towards adjacent 5 of strip center inside
Practical measuring section is calibrated to force value and its segment number such as following table：
| Number | 8 | 9 | 10 | 11 | 12 |
| Radial force value | 325 | 302 | 323 | 317 | 278 |
Quadratic polynomial curve matching is carried out to it, the polynomial function fitted is as follows：
RFx=-4.2143x2+76.386x-25
Data after being fitted according to above formula are as shown in the table.
| Number | 7 | 8 | 9 | 10 | 11 | 12 |
| Original radial direction force value | 250 | 325 | 302 | 323 | 317 | 278 |
| The radial force value of fitting | 303 | 316 | 321 | 317 | 305 | 284 |
That is rf7=250, RF7=303.
Similarly to transmission side portion section be fitted, take segment number be 26 measuring section towards strip center inside it is adjacent 5
A practical measuring section is calibrated to force value and its segment number such as following table：
| Number | 21 | 22 | 23 | 24 | 25 |
| Radial force value | 356 | 354 | 337 | 324 | 311 |
Quadratic polynomial curve matching is carried out to it, the polynomial function fitted is as follows：
RFx=-1.2857x2+47.143x-65.171
Data after being fitted according to above formula are as shown in the table.
That is rf26=186, RF26=291.
Since the plate shape measurement roller is whole roller insert piezomagnetic plate shape measurement roller, elastomer is rectangle structure, therefore is passed
Sensor area ratio, which can be converted directly into, measures sector width coverage rate.
γ7=f (rf7,RF7)=rf7/RF7=250/303=0.825
γ26=f (rf26,RF26)=rf26/RF26=186/291=0.639
It can be in the hope of at a distance from first measuring section outer edge of the band steel edge of fore side and fore side by above-mentioned data
wn, first measuring section outer edge distance w of transmission side band steel edge and fore sidem。
wn=(n- γn) × 52=(7-0.825) × 52=321
wm=(m-1+ γm) × 52=(26-1+0.639) × 52=1333
Obtaining can be in the hope of the developed width W of strip after above-mentioned datastripAnd strip running deviation amount Devstrip。
Wstrip=wm-wn=1333-321=1012mm
Devstrip=N × 52/2- (wm+wn)/2=33 × 52/2- (1333+321)/2=31mm
The strip width acquired by this method is 1012mm, and strip is to fore side sideslip 31mm.From attached drawing 1 I
As can be seen that matched curve is quartic polynomial matched curve, when fitting, eliminates first value of both sides edge, i.e., No. 7,
The measured value of No. 26 measuring sections, in Fig. 1 two fitting data of the left and right sides be No. 7 obtained after 5 quadratic polynomials fittings,
No. 26 measuring section match values.Meet the required precision of estimation strip width, Er Qie great using the value that 5 quadratic polynomials fit
Width reduces calculation amount.Therefore this method quickly can determine strip width and running deviation value by radial load measured data,
The phenomenon that drastically reducing the action of profile regulation mechanical errors, improves the strip shape quality of strip, significantly improves Strip Shape Control
The robustness of system, and improve the scope of application of plat control system.
Claims (2)
1. the method for determining strip width and strip running deviation amount according to the surveyed radial load of plate shape measurement roller, which is characterized in that including
Following steps：
1) plate shape measurement roller is measured using segmented, and segmented mode is two kinds：One kind is fixed width segmented mode；Another kind is
Edge is segmented cipher mode, encrypts measuring section in the edge of plate shape measurement roller, and the narrow measuring section width of edge is the wide survey of interlude
Measure the half of section width；
By the measuring section of plate shape measurement roller from the operation side of rack to transmission side number consecutively be (1,2,3 ..., N)：
When using fixed width segmented mode：Number is corresponded with measuring section, N is measuring section hop count；
When being segmented cipher mode using edge, wide measuring section is distributed to two numbers, narrow measuring section distributes a number, so
It is each numbered after number and corresponds to identical measuring section width, N is that wide measuring section hop count multiplies 2 plus narrow measuring section hop count；
When each coiled strip steel obtains the surveyed radial load measured data of first part of effective plate shape measurement roller, it is assumed that strip width covering
All measuring sections, all measuring section radial load measured datas are corresponding with the segment number of each measuring section；Radial load measured data with
After number is corresponding, number is (1,2,3 ..., N), and corresponding radial load measured data is (rf1,rf2,rf3,…,rfN)；
Since fore side to strip center judge successively each measuring section radial load measured data whether be more than it is preset most
Small threshold value, the minimum threshold is specifically determines according to plate shape measurement roller hardware after field adjustable, value range：0~20N；When going out
Existing first measured value for being more than default minimum threshold, then the measuring section is fore side covering starting measuring section, and segment number is recorded as
N, the measuring section radial load measured data are rfn；Similarly judge that obtaining transmission side covering starting surveys from transmission side to strip center
Section is measured, segment number is recorded as m, which is rfm；
2) measuring section is taken to be towards the corresponding number of the practical measuring section of strip center inside adjacent j and radial load measured data
Initial data carries out quadratic polynomial curve matching, the initial data used in fit procedure be segmented according to plate shape measurement roller and
The difference of its strip coverage condition has following 3 kinds of situations：
1. plate shape measurement roller is fixed width segmented mode plate shape measurement roller, measuring section and its reality of inside j that segment number is n are surveyed
Amount section is all wide measuring section or is all narrow measuring section；Or plate shape measurement roller is that edge is segmented cipher mode plate shape measurement roller, and section
Number measuring section for being n is narrow measuring section, and the j practical measuring section in inside is also all narrow measuring section；At this point, starting measuring section n and
The practical measuring section in inside j is all identical width, and the j practical measuring section in inside has j number, respectively (n+1, n+
2 ..., n+j), it is the corresponding radial load measured data of j practical measuring section for the radial load measured data that is fitted
(rfn+1,rfn+2,…,rfn+j)；
2. plate shape measurement roller, which is edge, is segmented cipher mode plate shape measurement roller, and the measuring section that segment number is n is narrow measuring section, in
It is not all narrow measuring section in the practical measuring section in side j, wherein there are k wide measuring sections, then this j practical measuring section is assigned j+k
A number, respectively (n+1, n+2 ..., n+j, n+j+1 ..., n+j+k), the radial load measured data for being fitted are this
The corresponding j+k radial load measured data (rf of j practical measuring sectionn+1,rfn+2,…,rfn+j,rfn+j+1,…,rfn+j+k)；
3. plate shape measurement roller, which is edge, is segmented cipher mode plate shape measurement roller, and the measuring section that segment number is n is wide measuring section, in
The practical measuring section in side j is also wide measuring section entirely, then this j practical measuring section corresponds to j*2 number, respectively (n+2, n+
3 ..., n+j*2), the radial force data for being fitted is surveyed practical radial load (rf by this j practical measuring sectionn+2,
rfn+3,…,rfn+j*2)；
3) when being fitted, measurement segment number is X-axis, and corresponding radial load measured data is Y-axis, is used using quadratic polynomial function
Least square method acquires corresponding quadratic polynomial coefficient (a, b, c), the quadratic polynomial curvilinear function fitted：
RFx=ax2+bx+c (1)
In formula (1), x is starting measuring section and its corresponding number of the practical measuring section in inside j, RFxTo number corresponding measuring section
Radial load match value；The measuring section match value RF that segment number is n is acquired using formula (1)n, match value RFnIt is complete with the measuring section
The radial load measured data measured when covering is approximate；
The width coverage rate of the measuring section：
γn=f (rfn,RFn) (2)
In formula (2), function f (rfn,RFn) concrete form it is related to sensor, working sensor in linear zone, sensor not by
When being completely covered, pass through rfn、RFnPercentage area coverage is acquired, reconvert is at measuring section width coverage rate；
Similarly, the width coverage rate γ of the capped measuring section m of transmission side first is acquiredm；
4) the width coverage rate γ of the capped measuring section n of fore side first is obtainednWith first capped measurement of transmission side
The width coverage rate γ of section mm, first measurement of band steel edge and fore side in fore side is asked respectively by following 5 kinds of situations
The distance w of section outer edgen, first measuring section outer edge distance w of transmission side band steel edge and fore sidem：
1. plate shape measurement roller is fixed width segmented mode plate shape measurement roller：
wn=(n- γn)×Widthwide
wm=(m-1+ γm)×Widthwide (3)
2. plate shape measurement roller, which is edge, is segmented cipher mode plate shape measurement roller, and the measuring section that segment number is n, m is narrow measuring section：
wn=(n- γn)×Widthnarrow
wm=(m-1+ γm)×Widthnarrow (4)
3. plate shape measurement roller, which is edge, is segmented cipher mode plate shape measurement roller, and the measuring section that segment number is n is wide measuring section, segment number
Measuring section for m is narrow measuring section：
wn=(n+1) × Widthnarrow-γn×Widthwide
wm=(m-1+ γm)×Widthnarrow (5)
4. plate shape measurement roller, which is edge, is segmented cipher mode plate shape measurement roller, and the measuring section that segment number is n is narrow measuring section, segment number
Measuring section for m is wide measuring section：
wn=(n- γn)×Widthnarrow
wm=(m-2) × Widthnarrow+γm×Widthwide (6)
5. plate shape measurement roller, which is edge, is segmented cipher mode plate shape measurement roller, and the measuring section that segment number is n, m is wide measuring section：
wn=(n+1) × Widthnarrow-γn×Widthwide
wm=(m-2) × Widthnarrow+γm×Widthwide (7)
In formula (3)~(7)：WidthwideFor the width of wide measurement zone, WidthnarrowFor the width of narrow measurement zone；
5) the developed width W of strip is soughtstripAnd strip running deviation amount Devstrip：
Plate shape measurement roller is fixed width segmented mode plate shape measurement roller：
Wstrip=wm-wn；
Devstrip=N × Widthwide/2-(wm+wn)/2；
Plate shape measurement roller is that edge is segmented cipher mode plate shape measurement roller：
Wstrip=wm-wn；
Devstrip=N × Widthnarrow/2-(wm+wn)/2。
2. the side according to claim 1 for determining strip width and strip running deviation amount according to the surveyed radial load of plate shape measurement roller
Method, which is characterized in that by the segment number corresponding process of all measuring section radial load measured datas and each measuring section in step 1)
In：
Fixed width segmented mode plate shape measurement roller is distributed correspondingly；
Edge is segmented cipher mode plate shape measurement roller, distributes radial load measured data is corresponding with measuring section when actual treatment；When
When the band steel band tension of theoretically perfect tray shape is covered on plate shape measurement roller, if the radial load measured data of wide measuring section is narrow measuring section
Radial load measured data it is double, then two segment numbers that wide measuring section is distributed distribute respectively radial load measured data two/
One；If the radial load measured data of wide measuring section and narrow measuring section is equal in magnitude, two segment numbers of wide measuring section all take radial direction
Power measured data size.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60158908A (en) * | 1984-01-27 | 1985-08-20 | Hitachi Ltd | Shape controlling method |
| DE19503363A1 (en) * | 1994-02-15 | 1995-09-07 | Siemens Ag | Control of properties of cold-rolled strips |
| CN102366764A (en) * | 2011-09-13 | 2012-03-07 | 中冶南方工程技术有限公司 | Processing method for reducing order of measured value of cold-rolled steel strip shape measuring signal |
| CN104275352A (en) * | 2014-09-22 | 2015-01-14 | 宁波宝新不锈钢有限公司 | Cold stripe mill deviation and shape automatic control method |
| CN104785546A (en) * | 2015-04-20 | 2015-07-22 | 中冶南方工程技术有限公司 | Edge portion measurement signal compensation method and device for contact type plate-shaped roller |
| CN104971948A (en) * | 2014-04-10 | 2015-10-14 | 鞍钢股份有限公司 | Method for controlling edge thinning of cold-rolled strip steel by asymmetrical roll shifting of working roll |
-
2016
- 2016-02-29 CN CN201610113436.0A patent/CN107127218B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60158908A (en) * | 1984-01-27 | 1985-08-20 | Hitachi Ltd | Shape controlling method |
| DE19503363A1 (en) * | 1994-02-15 | 1995-09-07 | Siemens Ag | Control of properties of cold-rolled strips |
| CN102366764A (en) * | 2011-09-13 | 2012-03-07 | 中冶南方工程技术有限公司 | Processing method for reducing order of measured value of cold-rolled steel strip shape measuring signal |
| CN104971948A (en) * | 2014-04-10 | 2015-10-14 | 鞍钢股份有限公司 | Method for controlling edge thinning of cold-rolled strip steel by asymmetrical roll shifting of working roll |
| CN104275352A (en) * | 2014-09-22 | 2015-01-14 | 宁波宝新不锈钢有限公司 | Cold stripe mill deviation and shape automatic control method |
| CN104785546A (en) * | 2015-04-20 | 2015-07-22 | 中冶南方工程技术有限公司 | Edge portion measurement signal compensation method and device for contact type plate-shaped roller |
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