CN105478491B - A kind of strip vibrates the localization method of line defective locations - Google Patents
A kind of strip vibrates the localization method of line defective locations Download PDFInfo
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- CN105478491B CN105478491B CN201410514065.8A CN201410514065A CN105478491B CN 105478491 B CN105478491 B CN 105478491B CN 201410514065 A CN201410514065 A CN 201410514065A CN 105478491 B CN105478491 B CN 105478491B
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Abstract
A kind of strip vibrates the localization method of line defective locations, including：A) parameter initialization set, including milling train export to roller cut between strip length, the pulse equivalency of template roller encoder, the setting of vibration alarming reference value；B) each rolling mill vibration signal, shear signal, each rolling mill screwdown amount information, coil of strip information, template roller encoder pulse signal are gathered；C) the vibrational energy value of each milling train is calculated according to vibration signal, according to strip equivalent length between each frame of drafts information calculating；The accumulated pulse quantity of the current time coiled strip steel is counted according to encoder pulse signal；D) vibration alarming judges；E) record vibration line defect original position, end position；F) vibration line defect information record and upload.The present invention realizes the accurate calculating of the steel defect position caused by any time each frame vibration by template roller encoder information and rolling mill screwdown amount information.
Description
Technical field
The invention belongs to steel strip surface defect detection field in smelter strip production process, and in particular to a kind of strip
Vibrate the localization method of line defective locations.
Background technology
Rolling mill vibration is one of common problem in the operation of rolling, and the problem of bringing serious to production is most prominent
Performance is the surface vibration line as caused by rolling mill vibration, even causes strip etc. to be broken when serious, continuity to production and
Other aspects bring serious adverse effect.
Because rolling mill vibration occurrence cause is complex, the expert and researcher of countries in the world are devoted to rolling mill vibration
Research, it is intended to the possible cause of reasonable dismissal rolling mill vibration and the effective vibration measure of drawing up of proposition, but by up to the present,
It there is no particularly effective method or measure fundamentally to solve the problems, such as rolling mill vibration, be using most methods so far
Rolling mill vibration situation is monitored by a set of rolling mill vibration monitoring system, by carrying out data to the vibration signal monitored
Analysis, to judge the Vibration Condition of milling train, when rolling mill vibration value exceedes setting value, is then alarmed, so as to remind operator
Member using corresponding measure avoid because rolling mill vibration and caused by batch production accident, but in strip vibration failure position positioning side
Face, the research that related personnel is carried out is seldom.
Chinese patent CN103115668A discloses " the fault signature extracting method of milling train oscillation mark vibration signal and identification side
Method ", it is the demodulation method based on second-order cyclic auto-correlation function, and frequency demodulation is carried out simultaneously to the oscillation mark vibration signal of non-stationary
Time domain section is carried out, the degree of accuracy of oscillation mark vibration signal fault signature extraction is improved, and proposed using power spectral information entropy
Form is come the method that do not proposed in alarm decision, patent defective locations positioning.
Chinese patent CN201179527Y discloses a kind of tandem-mill strip-steel vibration marks monitoring warning device, passes through
To the acquisition process of the signals such as rolling mill vibration, rotating speed, roll neck, coil of strip information, the early warning produced to vibration line phenomenon is realized, but specially
The method that vibration failure position is accurately positioned is not proposed in profit.
Chinese patent CN101450352A discloses a kind of strip vibration marks detection method, its by gather rolling mill vibration,
The information such as motor speed, coil of strip, are compared by the processing to vibration signal, and vibration alarming value, so as to realize that milling train shakes
Dynamic monitoring, alarming function.It is only capable of producing the coil of strip of vibration line according to coil of strip information searching, effective vibration failure position is not proposed
Put Exact Location Method.
Therefore, it is badly in need of a kind of localization method that line defective locations are vibrated for strip, not only realizes strip vibration alarming
Function, moreover it is possible to which accurate recording is carried out to vibration failure position, so as to be conducive to the inspection to steel defect, while being conducive to lacking
Fall into section accurately cut off, it is to avoid because partial vibration line defect and caused by strip entire volume scrap simultaneously raising product lumber recovery.
The content of the invention
It is an object of the invention to provide the localization method that a kind of strip vibrates line defective locations, solve in prior art means
The problem that line defective locations are accurately positioned, recorded can not be vibrated to strip.
To achieve the above object, the technical scheme is that：
A kind of strip vibrates the localization method of line defective locations, and it comprises the following steps：
A) parameter initialization set, including milling train export to roller cut between strip length L0, template roller encoder
Pulse equivalency Px, vibration alarming reference value G setting；
The pulse equivalency P of template roller encoderxCalculated by all umber of pulses of the girth and encoder of the template roller, i.e., one
Strip displacement representated by individual pulse signal on template roller roll surface；
B) each rolling mill vibration signal X is gatheredi, shear signal, each rolling mill screwdown amount information, coil of strip information, template roller coding
Device pulse signal；Coil of strip information includes reel number, steel grade, inlet thickness, exit thickness, strip width；
C) data processing is carried out to the vibration signal and drafts information that are gathered, including according to the vibration signal meter of collection
The vibrational energy value H of each milling train is calculated, the strip equivalent length l between each frame is calculated according to drafts informationi′；According to coding
Accumulated pulse quantity N of the device pulse signal to the current time coiled strip steeliCounted.
Rolling mill vibration energy value H refers to the root-mean-square value calculated the vibration signal after processing, i.e.,：
Wherein, n is signal collected signal data point number.
Strip equivalent length l between each framei' refer to after the completion of when the strip of forebay to next frame through rolling
Strip length, wherein i represents shelf number.According to constancy of volume principle in the operation of rolling, it is known that liDh=li' d ' h ', because
Strip width does not change in the operation of rolling, i.e.,：
Wherein, li, d, h be respectively rolling before strip length, width, thickness；
li', d ', h ' be respectively roll after strip length, width, thickness；
η is the relative reduction of rolling front and back band steel thickness；
Accumulated pulse quantity Ni refer to current coiled strip steel from last time after shear signal is sent to working as
The stereotyping roller encoder accumulative number of pulses sent when preceding.
D) vibration alarming judges
By being compared in real time vibrational energy value and alarm reference value, referred to when vibrational energy value H exceedes alarm
During value G, it is believed that the vibration of current level can cause defect to belt steel surface, be simultaneously emitted by vibration alarming information alert operator
Member；
E) record vibration line defect original position, end position
According to acquired vibration alarming information, if certain frame at a time vibrate generation alarm and and previous moment not
Alarm, then it is assumed that it is vibration line defect original position to be in the strip position in the frame roll gap；Similarly, if the frame exists
Alarm does not occur for a certain moment vibration and previous moment is alarmed, then it is assumed that the strip position being in the frame roll gap is to shake
Dynamic line defect end position；
Certain frame, which at a time vibrates caused vibration line defect more specific location information, to be calculated by below equation,
I.e.：
Li=L0+ l '+S=L0+l′+NiPx
Wherein, L0The strip length exported to for milling train between strip cutter；
L ' is the strip equivalent length that the frame is exported to milling train, and strip between each frame etc. is exported for the frame to milling train
Imitate length li' sum；
S is the accumulative rolling distance after strip self cleavage, S=NiPx；
NiFor current time encoder accumulated pulse quantity；
F) vibration line defect information record and upload
In the generating process once vibrated, possible multiple frames can all be vibrated simultaneously, in addition in same coil of strip,
May occur to vibrate more than twice, it is thus possible to a series of vibration failure positions intervals can be obtained, to its vibration failure position
Overlapping region is merged, and some sections of discrete defective locations information is obtained, by its information record and with coil of strip information package
Pass, be easy to lower road unit to carry out defect inspection.
Further, such as milling train does not configure template roller encoder, then passes through on other rollers (including guide roller, top pinch roll)
Encoder is set or rice wheel, horizontal metroscope can also obtain similar strip length information as remembered using other equipment.
In the methods of the invention：
The setting of alarm reference value G in the step a) is needed with reference to the actual vibration energy value of milling train and by examining
Personnel vibrate the result of determination of line defect to carry out reasonable set to strip, when its numerical value is between vibration line defect generation and do not produce
Distinguish when raw between corresponding rolling mill vibration energy value.
Rolling mill vibration signal in the step b), passes through the acceleration sensing installed in mill housing plan vertical direction
Device gathers rolling mill vibration signal.
Shear signal in the step b) is as the cut-point of coil of strip, and foundation stored as a file is simultaneously to encoder
The count value of pulse signal carries out zero setting.
Each rolling mill screwdown amount information in the step b) can be obtained directly from mill control system.
Coil of strip information in the step b) comes from the creation data that scene is issued, and can directly invoke.
The beneficial effects of the invention are as follows：
1. the present invention is by template roller encoder information and rolling mill screwdown amount information, so as to realize any time each frame institute
The accurate calculating of correspondence steel defect position, solves not being accurately positioned with vibration line defective locations in prior art means
Problem.
2., can be according to vibration line defect length information as early as possible by record and upload to vibrating line defective locations information
Handle there is vibration line defect coil of strip, it is to avoid defective coil flows into lower road unit or come into the market.
3. passing through recorded vibration line defective locations information, targetedly range check can be carried out to strip, from
And reduce workload.
4. pass through recorded vibration line defective locations information, can after strip uncoiling according to defective locations information to depositing
Cut off in defect section, so as to avoid the entire volume of strip from sealing up for safekeeping.
Brief description of the drawings
Fig. 1 is vibration line defective locations localization method flow chart.
Fig. 2 is the strip length schematic diagram in each region of milling train and milling train outlet in the present embodiment.
Embodiment
Referring to Fig. 1, Fig. 2, below by taking the producing line deployment scenarios of 1,730 5 tandem mills as an example, the inventive method is carried out specific
Explanation.
Five tandem mills include No. one~No. five frame 1#~5#, and No. five frame 5# outlets set gradually template roller 1, pinch roll
2nd, coil of strip cutter 3, coiling machine 4.
The strip length L that A, setting are exported between coil of strip cutter from No. five milling trains0, set the strip between each frame
Length L12、L23、L34、L45, set vibration alarming reference value, setting template roller encoder pulse equivalent Px；
Wherein, D is template roller diameter；P is template roller encoder resolution；
L in the step A0=L1+L2+L3, including three parts, respectively five rack outlets between template roller 1 away from
From L1, template roller 1 to the distance between pinch roll 2 L2, pinch roll 2 to the distance between coil of strip cutter 3 (roller is cut) L3, such as
Shown in Fig. 2；
B, collection vibration signal, shear signal, rolling mill screwdown amount information, coil of strip information, template roller encoder pulse signal；
Vibration signal in the step B is used for rolling mill vibration alarm decision；Shear signal as file data separation
Point, while by encoder pulse signal-count value zero setting；Coil of strip information is used for file and stores and show；Rolling mill screwdown amount information and
Template roller encoder pulse signal is positioned for steel defect position；
C, the vibrational energy value according to each frame of the computational methods of vibrational energy value calculating, according to encoder pulse signal pair
Number of pulses is counted, and the equivalent strip length l ' between four, five frames is calculated according to drafts information45：
Similarly, the equivalent strip length between each frame is calculated：
Wherein l12、l23、l34、l45Respectively one, the band between two frames, two, three frames, three, four frames, four, five frames
Steel length, l '12、l′23、l′34、l′45Between respectively one, two frames, two, three frames, three, four frames, four, five frames etc.
Imitate strip length, η2、η3、η4、η5The drafts of respectively No. two, No. three, No. four, No. five milling trains；
D, vibration alarming judge
By being compared in real time vibrational energy value and alarm reference value, when vibrational energy value exceedes alarm reference value
When, it is believed that the vibration of current level can cause defect to belt steel surface, be simultaneously emitted by vibration alarming information alert operating personnel；
When E, vibration alarming occur, record the template roller of the shelf number vibrated and vibration alarming starting with the end of and compile
Code device count value Na、Nb, strip vibration line defect original position La=L0+l′+NaPx, end position Lb=L0+l′+NbPx；
Wherein l ' is strip equivalent length between milling train, according to the shelf number vibrated, and its length, which is equal to, to be vibrated
Frame is to the strip equivalent length sum between each frame of five frames, exemplified by vibrating and occur in three frames：
F, vibration line defect information record and upload
In a vibration processes, possible multiple frames, which can all be affected, also to be vibrated, in addition in same coil of strip,
May occur to vibrate more than twice, it is thus possible to a series of vibration failure position interval (l can be obtaineda1, lb1), (la2,
lb2) ..., its vibration failure position interval is merged, some sections of defective locations information are finally given, by its information record
And together uploaded with coil of strip number, it is easy to lower road unit to carry out defect inspection.
Claims (2)
1. a kind of strip vibrates the localization method of line defective locations, it is characterized in that, comprise the following steps：
A) parameter initialization set, including milling train export to roller cut between strip length L0, template roller encoder pulse work as
Measure Px, vibration alarming reference value G setting；
The pulse equivalency P of template roller encoderxCalculated by all umber of pulses of the girth and encoder of the template roller, i.e., one arteries and veins
Rush the strip displacement on template roller roll surface representated by signal；
B) each rolling mill vibration signal X is gatheredi, shear signal, each rolling mill screwdown amount information, coil of strip information, template roller encoder pulse
Signal；Coil of strip information includes reel number, steel grade, inlet thickness, exit thickness, strip width；
C) data processing is carried out to the vibration signal and drafts information that are gathered, including calculates each according to the vibration signal of collection
The vibrational energy value H of milling train, the strip equivalent length l ' between each frame is calculated according to drafts informationi；According to encoder arteries and veins
Rush accumulated pulse quantity N of the signal to current time stripiCounted；
Rolling mill vibration energy value H refers to the root-mean-square value calculated the vibration signal after processing, i.e.,：
<mrow>
<mi>H</mi>
<mo>=</mo>
<msqrt>
<mfrac>
<mrow>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>0</mn>
</mrow>
<mi>n</mi>
</munderover>
<msup>
<mrow>
<mo>(</mo>
<msubsup>
<mi>X</mi>
<mi>i</mi>
<mo>&prime;</mo>
</msubsup>
<mo>)</mo>
</mrow>
<mn>2</mn>
</msup>
</mrow>
<mi>n</mi>
</mfrac>
</msqrt>
</mrow>
Wherein, n is signal collected signal data point number；
Strip equivalent length l between each framei' refer to from the strip when forebay to next frame through the band after the completion of rolling
Steel length, wherein i represent shelf number；According to constancy of volume principle in the operation of rolling, it is known that liDh=l 'iD ' h ', because of strip
Width does not change in the operation of rolling, i.e.,：
<mrow>
<msubsup>
<mi>l</mi>
<mi>i</mi>
<mo>&prime;</mo>
</msubsup>
<mo>=</mo>
<mfrac>
<mrow>
<msub>
<mi>l</mi>
<mi>i</mi>
</msub>
<mi>h</mi>
</mrow>
<msup>
<mi>h</mi>
<mo>&prime;</mo>
</msup>
</mfrac>
<mo>=</mo>
<mfrac>
<msub>
<mi>l</mi>
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</msub>
<mrow>
<mn>1</mn>
<mo>-</mo>
<mi>&eta;</mi>
</mrow>
</mfrac>
<mo>,</mo>
</mrow>
Wherein, li, d, h be respectively rolling before strip length, width, thickness；
l′i, d ', h ' be respectively roll after strip length, width, thickness；
η is the relative reduction of rolling front and back band steel thickness；
Accumulated pulse quantity NiRefer to current coiled strip steel from last time after shear signal is sent it is accumulative to current time template roller encoder
The number of pulses sent；
D) vibration alarming judges
By being compared in real time vibrational energy value and alarm reference value, when vibrational energy value H exceedes alarm reference value G
When, it is believed that the vibration of current level can cause defect to belt steel surface, be simultaneously emitted by vibration alarming information alert operating personnel；
E) record vibration line defect original position, end position
According to acquired vibration alarming information, if certain frame at a time vibrates generation alarm and and previous moment does not occur
Alarm, then it is assumed that it is vibration line defect original position to be in the strip position in the frame roll gap；Similarly, if the frame is a certain
Alarm does not occur for moment vibration and previous moment is alarmed, then it is assumed that it is vibration line to be in the strip position in the frame roll gap
Defect end position；
Certain frame, which at a time vibrates caused vibration line defect more specific location information, to be calculated by below equation, i.e.,：
Li=L0+ l '+S=L0+l′+NiPx
Wherein L0The strip length exported to for milling train between strip cutter；
L ' is the strip equivalent length that the frame is exported to milling train, and the equivalent length of strip between each frame is exported for the frame to milling train
Spend li' sum；
S is the accumulative rolling distance after strip self cleavage, S=NiPx；
NiFor current time encoder accumulated pulse quantity；
PxFor encoder pulse equivalent；
F) vibration line defect information record and upload
In the generating process once vibrated, multiple frames can all be vibrated simultaneously, in addition in same coil of strip, can also occur two
Vibrated more than secondary, therefore can obtain a series of vibration failure positions intervals, the overlapping region of its vibration failure position is closed
And, some sections of discrete defective locations information are obtained, is uploaded by its information record and with coil of strip information package, is easy to lower road unit
Carry out defect inspection.
2. strip as claimed in claim 1 vibrates the localization method of line defective locations, it is characterized in that, such as milling train does not configure template
Roller encoder, then by setting encoder on guide roller or top pinch roll or obtaining strip length using note rice wheel or horizontal metroscope
Information.
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106290776A (en) * | 2016-09-27 | 2017-01-04 | 马鞍山钢铁股份有限公司 | Strip process parameter detection method with a length of unit |
| CN108568455A (en) * | 2017-03-10 | 2018-09-25 | 宝山钢铁股份有限公司 | A kind of method of rolling mill vibration monitoring and vibration line defect estimation |
| CN112122352B (en) * | 2019-06-24 | 2022-03-15 | 上海梅山钢铁股份有限公司 | Control method for improving accurate positioning of defects of pickled products |
| CN113059007B (en) * | 2021-02-26 | 2023-05-09 | 武汉钢铁有限公司 | Method and device for positioning surface defects of rolled piece |
| CN113182351B (en) * | 2021-04-15 | 2023-04-11 | 首钢集团有限公司 | Method and device for judging generation position of vibration chatter marks of hot continuous rolling mill |
| CN114939542A (en) * | 2022-06-01 | 2022-08-26 | 成都宝钢汽车钢材部件加工配送有限公司 | Automatic sorting control system, automatic sorting equipment and control method for defective plates |
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| CN2649201Y (en) * | 2003-10-29 | 2004-10-20 | 宝山钢铁股份有限公司 | Apparatus for inhibiting band steel vibration |
| CN2734345Y (en) * | 2004-09-29 | 2005-10-19 | 宝山钢铁股份有限公司 | Device for inhibiting band steel jitter employing eletromagnetic technology |
| CN101450352A (en) * | 2007-12-04 | 2009-06-10 | 上海宝钢工业检测公司 | Tandem-mill strip-steel vibration marks detection method |
| CN102198453A (en) * | 2010-03-23 | 2011-09-28 | 宝山钢铁股份有限公司 | Method for detecting vibration marks on surface of roller |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CA2620839A1 (en) * | 2005-08-05 | 2007-02-15 | Dofasco Inc. | Method and system for detecting faults in sheet material |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2649201Y (en) * | 2003-10-29 | 2004-10-20 | 宝山钢铁股份有限公司 | Apparatus for inhibiting band steel vibration |
| CN2734345Y (en) * | 2004-09-29 | 2005-10-19 | 宝山钢铁股份有限公司 | Device for inhibiting band steel jitter employing eletromagnetic technology |
| CN101450352A (en) * | 2007-12-04 | 2009-06-10 | 上海宝钢工业检测公司 | Tandem-mill strip-steel vibration marks detection method |
| CN102198453A (en) * | 2010-03-23 | 2011-09-28 | 宝山钢铁股份有限公司 | Method for detecting vibration marks on surface of roller |
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