CN108568455A - A kind of method of rolling mill vibration monitoring and vibration line defect estimation - Google Patents
A kind of method of rolling mill vibration monitoring and vibration line defect estimation Download PDFInfo
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- CN108568455A CN108568455A CN201710142524.8A CN201710142524A CN108568455A CN 108568455 A CN108568455 A CN 108568455A CN 201710142524 A CN201710142524 A CN 201710142524A CN 108568455 A CN108568455 A CN 108568455A
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- vibration
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- line defect
- rolling mill
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Classifications
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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
Abstract
A kind of method of rolling mill vibration monitoring and vibration line defect estimation, for while realizing vibration and alarm, realize the accurate judgement of vibration line defect, coordinate basic automatization control machine to complete by detector, data processing unit, data storage cell, data comparing unit and output unit are provided in the basic automatization control machine.A kind of rolling mill vibration monitoring of the present invention and the method for vibration line defect estimation, under the guiding theory of low cost, defect estimation method is introduced on the basis of rolling mill vibration monitors and alarms, both the promptness of vibration alarming had been ensure that, so that vibration early period of origination can intervention in time processing, avoid the aggravation of vibration, to reduce the occurrence quantity of vibration line defect, the accurate judgement to vibrating line defect is realized further through defect estimation method, the accuracy rate for effectively increasing vibration line defect dipoles reduces misjudgement or the loss brought of failing to judge.
Description
Technical field
The invention belongs to the measurement method fields of rolling mill for metal or its converted products, and in particular to a kind of rolling mill vibration monitoring
And the method for vibration line defect estimation.
Background technology
Rolling mill vibration is one of common problem in the operation of rolling, is vibration line defect when rolling mill vibration is lighter,
The upper and lower surface in strip is embodied in there is the light and dark regular striped vertical with rolling direction, works as rolling mill vibration
When heavier, vibration line defect, which can be further aggravated, shows as thickness change, under serious situation, or even can be caused by rolling mill vibration
The accidents such as strip broken belt.Therefore, rolling mill vibration has serious unfavorable shadow to continuity of product surface quality, production etc.
It rings.
For a long time, mainly live milling train is listened to transport by ear by site operation personnel the judgement of rolling mill vibration
Whether sound when turning is judged that since site environment noise is noisy, and there are subjectivities for this judgment mode extremely, and
By different operation personnel's experience differentia influence, therefore it often will appear and judge wrong situation, cause more unnecessary loss.
By installing vibrating sensor on milling train, on the one hand by the high sensitivity of sensor, can just be opened in milling train
Begin to be issued by vibration alarming when vibration, to allow the operator to take timely measure the further expansion for inhibiting vibration, separately
On the one hand, it may be implemented effectively to monitor rolling mill vibration situation by vibrating sensor, that is, avoid artificial judgment
Subjectivity can also carry out quantitatively evaluating, to effectively reduce the false determination ratio of vibration line defect to extent of vibration.
In general, rolling mill vibration develops to the time that high vibration only has several seconds from slight vibration, therefore, to rolling mill vibration
Detection requirement has very high promptness, for this reason, it may be necessary to by the lower of alarm threshold value setting, to detect vibration in time
It generates.However, alarm threshold value setting is lower, the accuracy rate of vibration alarming is poorer, to vibrating the misjudgement of line defect and failing to judge just
It can increase, therefore the accuracy rate for how obtaining preferable alarm promptness and defect dipoles simultaneously is the key that need to solve to ask
Topic.
Application No. is the patent applications of " 201010130655.2 ", disclose a kind of detection side of vibration marks on surface of roller
The left and right axle journal at roll both ends is seated on left and right sidesing supporting frame by method respectively, is placed and is equipped in the radial side of the roll
The rotation center of the grinding wheel stand of grinding wheel, the rotation center for making the grinding wheel and the roll is in the same horizontal position, and at this
Mounting surface on one side encloses the roller rotational m displacement sensor of the roll on the grinding wheel stand of the same horizontal position
The waveform of the roller surface is measured on one side, obtains the signal of roll surface waveform, vibration is installed in the left support frame
Sensor, generated vibration signal measures when to the roller rotational, by approach switch sensor be mounted on it is described
At the opposite side of the keyway of right axle neck, a pulse signal is issued by when it detects the keyway.
Application No. is the patent applications of " 201410514065.8 ", disclose a kind of positioning of strip vibration line defective locations
Method, including：Parameter initialization set, including milling train export to roller cut between strip length, the arteries and veins of template roller encoder
Rush the setting of equivalent, vibration alarming reference value；Acquire each rolling mill vibration signal, shear signal, each rolling mill screwdown amount signal, coil of strip
Information, plate shape roller encoder pulse signal, the vibrational energy magnitude of each milling train is calculated according to vibration signal, according to drafts information meter
Strip equivalent length between each rack is calculated, the accumulated pulse quantity of the current time coiled strip steel is carried out according to encoder pulse signal
It counts, vibration alarming judges, record vibration line defect initial position, end position vibrate line defect information record and upload.
Invention content
In order to solve the above problem, the method that the present invention provides a kind of monitoring of rolling mill vibration and vibration line defect estimation, can be with
Ensure that the accuracy of the promptness and vibration line defect dipoles of vibration alarming, technical solution are specific as follows：
A kind of method of rolling mill vibration monitoring and vibration line defect estimation, for while realizing vibration and alarm,
Realize the accurate judgement of vibration line defect, it is characterised in that：
Coordinate basic automatization control machine to complete by detector, number is provided in the basic automatization control machine
According to processing unit, data storage cell, data comparing unit and output unit, following step sequence is specifically included：
S1：Sensor is installed at the top of mill housing；
S2：By the alarming value of setting and the data storage cell of the defective value typing basic automatization control machine of setting；
S3：The vibration current value detected in real time is sent into the receiving terminal of basic automatization control machine by sensor；
S4：The i current value received is carried out data calculating by the data processing unit of basic automatization control machine, and will
The result of calculating is demarcated as standard value；
S5：The defective value of standard value, the alarming value of setting and setting is sent into data comparing unit；
S6：The alarming value of standard of comparison value and setting, when standard value is more than or equal to the alarming value of setting, notice output is single
Member output vibration alarming signal；
S7：The defective value of standard of comparison value and setting, when standard value is more than or equal to the defective value of setting, notice output is single
Member output defect alarm signal.
The method of a kind of rolling mill vibration monitoring according to the present invention and vibration line defect estimation, it is characterised in that：
In step S4, " the data calculating ", specially：Bandpass filtering is carried out to each current value received,
And filtered signal is subjected to virtual value calculating, calculated virtual value is demarcated as standard value.
The method of a kind of rolling mill vibration monitoring according to the present invention and vibration line defect estimation, it is characterised in that：
In step S2, the alarming value set is with normal virtual value of the milling train in the case where Vibration Condition does not occur as reference
It is set.
The method of a kind of rolling mill vibration monitoring according to the present invention and vibration line defect estimation, it is characterised in that：
In step S2, the defective value foundation of the setting starts to generate vibration virtual value corresponding when vibration line defect
Setting.
The method of a kind of rolling mill vibration monitoring according to the present invention and vibration line defect estimation, it is characterised in that：
The virtual value is determined according to following relationship：
Wherein, YiRefer to i-th of value in filtered signal；
N is the data point number of the signal；
YrmsFor virtual value.
The method of a kind of rolling mill vibration monitoring according to the present invention and vibration line defect estimation, it is characterised in that：
The filtering section is chosen for [100,300] HZ.
The method of a kind of rolling mill vibration monitoring according to the present invention and vibration line defect estimation, it is characterised in that：
The alarming value of the setting is set higher than normal virtual value 0.01g-of the milling train in the case where Vibration Condition does not occur
0.1g。
A kind of rolling mill vibration monitoring of the present invention and the method for vibration line defect estimation, under the guiding theory of low cost,
Defect estimation method is introduced on the basis of rolling mill vibration monitors and alarms, both ensure that the promptness of vibration alarming so that
Vibration early period of origination can intervention in time processing, avoid the aggravation of vibration, to reduce vibration line defect generation
Amount realizes the accurate judgement to vibrating line defect further through defect estimation method, effectively increases vibration line defect dipoles
Accuracy rate reduces misjudgement or the loss brought of failing to judge.
Description of the drawings
Fig. 1 is the flow diagram of the present invention；
Fig. 2 is the vibration alarming and defect estimation result schematic diagram one of embodiment in the present invention；
Fig. 3 is the vibration alarming and defect estimation result schematic diagram two of embodiment in the present invention.
Specific implementation mode
It is lacked in the following, being monitored to a kind of rolling mill vibration of the present invention according to specification drawings and specific embodiments and vibrating line
It falls into and sentences method for distinguishing and be further described in detail.
The method of a kind of monitoring of rolling mill vibration and vibration line defect estimation as shown in Figure 1, for realizing that vibration is timely
While alarm, the accurate judgement of vibration line defect is realized, coordinate basic automatization control machine to complete by detector, described
Basic automatization control machine in be provided with data processing unit, data storage cell, data comparing unit and output unit, have
Body includes following step sequence：
S1：Sensor is installed at the top of mill housing；
S2：By the alarming value of setting and the data storage cell of the defective value typing basic automatization control machine of setting；
S3：The vibration current value detected in real time is sent into the receiving terminal of basic automatization control machine by sensor；
S4：The i current value received is carried out data calculating by the data processing unit of basic automatization control machine, and will
The result of calculating is demarcated as standard value；
S5：The defective value of standard value, the alarming value of setting and setting is sent into data comparing unit；
S6：The alarming value of standard of comparison value and setting, when standard value is more than or equal to the alarming value of setting, notice output is single
Member output vibration alarming signal；
S7：The defective value of standard of comparison value and setting, when standard value is more than or equal to the defective value of setting, notice output is single
Member output defect alarm signal.
Wherein,
In step S4, " the data calculating ", specially：Bandpass filtering is carried out to each current value received,
And filtered signal is subjected to virtual value calculating, calculated virtual value is demarcated as standard value.
Wherein,
In step S2, the alarming value of the setting be it is preset, with milling train in the case where Vibration Condition does not occur just
Normal virtual value as reference, considers promptness and the rate of false alarm of its alarm to set, its usual numerical values recited is just than milling train
The high about 0.01g-0.1g of vibration virtual value under normal working order.
Wherein,
In step S2, the defective value of the setting is preset, and numerical values recited is shaken by scene tracking statistics
Relationship between dynamic line material object defect level and vibration virtual value, according to the vibration line defect estimation standard at scene, just to start
Vibration virtual value corresponding when vibrating line defect is generated to set defective value.
Wherein,
The virtual value is determined according to following relationship：
Wherein, YiRefer to i-th of value in filtered signal；
N is the data point number of the signal；
YrmsFor virtual value.
Wherein,
The filtering section is chosen for [100,300] HZ.
The present invention a kind of rolling mill vibration monitoring and vibration line defect estimation method rolling mill vibration monitor and alarm
On the basis of introduce defect estimation method, both ensure that the promptness of vibration alarming so that vibration early period of origination can and
When intervention handle, avoid the aggravation of vibration, it is real further through defect estimation method to reduce the occurrence quantity of vibration line defect
The accurate judgement to vibrating line defect is showed, has effectively increased the accuracy rate of vibration line defect dipoles, reduce misjudgement or has failed to judge
The loss brought.
Embodiment
Step 1：The vibration signal that milling train is acquired by the vibrating sensor at the top of mill housing, is adopted with certain
Sample frequency f gathered data length is the vibration signal Xi (i=1,2,3...n) of n.
Step 2：N obtained data point will once be sampled and carry out bandpass filtering, frequency separation is 100~300Hz, is obtained
Signal Yi (i=1,2,3...n) after the completion of filtering calculates virtual value to Yi, and calculation formula is：
Step 3：Compare vibration virtual value and alarming value, if virtual value is more than alarming value, sends out rolling mill vibration alarm signal
Breath.
Step 4：Compare vibration virtual value and defective value, if virtual value is more than defective value, sends out vibration line defect alarm
Information.
Real time on-line monitoring, sample frequency 5120Hz, unitary sampling points are carried out to the Vibration Condition of certain five tandem mill
It it is 1024 points, certain coil of strip was the 405th second normally rolled, and rolling mill vibration monitoring system sends out vibration alarming signal, by operation
The timely reduction of speed processing of work, inhibits further increasing for vibration in time, through checking that historical data, vibrational waveform and virtual value are bent
Line has exceeded vibration alarming value 0.054g but is less than set defect as shown in Fig. 2, maximum vibration virtual value is 0.122g
Alarming value 0.2g, accordingly result judgement think belt steel surface line defect without friction, after to exam paper assessment strip carry out uncoiling, do not send out
Existing vibration line defect.
Real time on-line monitoring, sample frequency 5120Hz, unitary sampling points are carried out to the Vibration Condition of certain five tandem mill
It it is 1024 points, the 241st second normally rolled, rolling mill vibration monitoring system first had issued vibration alarming signal, then again the
Vibration line defect alarm signal is sent out within 243 seconds, through checking historical data, vibrational waveform and virtual value curve are as shown in figure 3, most
Big vibration virtual value is 0.25g, has exceeded set defect alarming value 0.2g, and result judges that thinking that belt steel surface has shakes accordingly
Dynamic line defect, after uncoiling is carried out to exam paper assessment strip, it is found that there is visual visible slight vibration line defect on its surface.
A kind of rolling mill vibration monitoring of the present invention and the method for vibration line defect estimation, under the guiding theory of low cost,
Defect estimation method is introduced on the basis of rolling mill vibration monitors and alarms, both ensure that the promptness of vibration alarming so that
Vibration early period of origination can intervention in time processing, avoid the aggravation of vibration, to reduce vibration line defect generation
Amount realizes the accurate judgement to vibrating line defect further through defect estimation method, effectively increases vibration line defect dipoles
Accuracy rate reduces misjudgement or the loss brought of failing to judge.
Claims (7)
1. a kind of method of rolling mill vibration monitoring and vibration line defect estimation, is used for while realizing vibration and alarm, real
Now vibrate the accurate judgement of line defect, it is characterised in that：
Coordinate basic automatization control machine to complete by detector, is provided at data in the basic automatization control machine
Unit, data storage cell, data comparing unit and output unit are managed, following step sequence is specifically included：
S1：Sensor is installed at the top of mill housing；
S2：By the alarming value of setting and the data storage cell of the defective value typing basic automatization control machine of setting；
S3：The vibration current value detected in real time is sent into the receiving terminal of basic automatization control machine by sensor；
S4：The i current value received is carried out data calculating by the data processing unit of basic automatization control machine, and will be calculated
Result be demarcated as standard value；
S5：The defective value of standard value, the alarming value of setting and setting is sent into data comparing unit；
S6：The alarming value of standard of comparison value and setting, when standard value is more than or equal to the alarming value of setting, notice output unit is defeated
Go out vibration alarming signal；
S7：The defective value of standard of comparison value and setting, when standard value is more than or equal to the defective value of setting, notice output unit is defeated
Go out defect alarm signal.
2. the method for a kind of rolling mill vibration monitoring according to claim 1 and vibration line defect estimation, it is characterised in that：
In step S4, " the data calculating ", specially：Bandpass filtering is carried out to each current value received, and will
Filtered signal carries out virtual value calculating, and calculated virtual value is demarcated as standard value.
3. the method for a kind of rolling mill vibration monitoring according to claim 1 and vibration line defect estimation, it is characterised in that：
In step S2, the alarming value set is carried out with normal virtual value of the milling train in the case where Vibration Condition does not occur as reference
Setting.
4. the method for a kind of rolling mill vibration monitoring according to claim 1 and vibration line defect estimation, it is characterised in that：
In step S2, the defective value of the setting is set according to vibration virtual value corresponding when starting to generate vibration line defect
It is fixed.
5. the method for a kind of rolling mill vibration monitoring according to claim 2 and vibration line defect estimation, it is characterised in that：
The virtual value is determined according to following relationship：
Wherein, YiRefer to i-th of value in filtered signal；
N is the data point number of the signal；
YrmsFor virtual value.
6. the method for a kind of rolling mill vibration monitoring according to claim 2 and vibration line defect estimation, it is characterised in that：
The filtering section is chosen for [100,300] HZ.
7. the method for a kind of rolling mill vibration monitoring according to claim 3 and vibration line defect estimation, it is characterised in that：
The alarming value of the setting is set higher than normal virtual value 0.01g -0.1g of the milling train in the case where Vibration Condition does not occur.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110449469A (en) * | 2019-07-15 | 2019-11-15 | 太原理工大学 | A kind of ripple rolling mill roll system vibration detection control device and control method |
| RU2734360C2 (en) * | 2018-12-21 | 2020-10-15 | Публичное акционерное общество "Северсталь" (ПАО "Северсталь") | Method for determining occurrence of initial stage of critical vibration in working stand of rolling mill |
| CN113182351A (en) * | 2021-04-15 | 2021-07-30 | 首钢集团有限公司 | Method and device for judging generation position of vibration chatter marks of hot continuous rolling mill |
| CN113290063A (en) * | 2021-05-17 | 2021-08-24 | 苏州德姆斯信息技术有限公司 | Monitoring and analyzing system and monitoring and analyzing method for sheet cold rolling mill |
| CN113333481A (en) * | 2021-05-31 | 2021-09-03 | 广东韶钢松山股份有限公司 | On-line detection method and device for hot metal detector state in continuous rolling production line |
| RU2762353C1 (en) * | 2021-02-12 | 2021-12-20 | Публичное акционерное общество «Северсталь» (ПАО «Северсталь») | Method for continuous cold rolling with tension |
| RU2763501C1 (en) * | 2021-03-22 | 2021-12-29 | Публичное акционерное общество «Северсталь» (ПАО «Северсталь») | Method for determining occurrence of initial stage of critical vibration in working stand of rolling mill |
| CN114061922A (en) * | 2020-07-30 | 2022-02-18 | 宝山钢铁股份有限公司 | Disc shear abnormal condition early warning method based on vibration data |
| CN114247759A (en) * | 2020-09-23 | 2022-03-29 | 宝山钢铁股份有限公司 | Method for identifying and early warning vibration defects of hot rolling finishing mill |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110449469A (en) * | 2019-07-15 | 2019-11-15 | 太原理工大学 | A kind of ripple rolling mill roll system vibration detection control device and control method |
| CN114061922A (en) * | 2020-07-30 | 2022-02-18 | 宝山钢铁股份有限公司 | Disc shear abnormal condition early warning method based on vibration data |
| CN114247759A (en) * | 2020-09-23 | 2022-03-29 | 宝山钢铁股份有限公司 | Method for identifying and early warning vibration defects of hot rolling finishing mill |
| RU2762353C1 (en) * | 2021-02-12 | 2021-12-20 | Публичное акционерное общество «Северсталь» (ПАО «Северсталь») | Method for continuous cold rolling with tension |
| RU2763501C1 (en) * | 2021-03-22 | 2021-12-29 | Публичное акционерное общество «Северсталь» (ПАО «Северсталь») | Method for determining occurrence of initial stage of critical vibration in working stand of rolling mill |
| CN113182351A (en) * | 2021-04-15 | 2021-07-30 | 首钢集团有限公司 | Method and device for judging generation position of vibration chatter marks of hot continuous rolling mill |
| CN113290063A (en) * | 2021-05-17 | 2021-08-24 | 苏州德姆斯信息技术有限公司 | Monitoring and analyzing system and monitoring and analyzing method for sheet cold rolling mill |
| CN113333481A (en) * | 2021-05-31 | 2021-09-03 | 广东韶钢松山股份有限公司 | On-line detection method and device for hot metal detector state in continuous rolling production line |
| CN113333481B (en) * | 2021-05-31 | 2022-12-06 | 广东韶钢松山股份有限公司 | On-line detection method and device for hot metal detector state in continuous rolling production line |
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