CN107138541B - A kind of cold roll operating condition inline diagnosis method - Google Patents
A kind of cold roll operating condition inline diagnosis method Download PDFInfo
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- CN107138541B CN107138541B CN201710288435.4A CN201710288435A CN107138541B CN 107138541 B CN107138541 B CN 107138541B CN 201710288435 A CN201710288435 A CN 201710288435A CN 107138541 B CN107138541 B CN 107138541B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/12—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll camber
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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 belongs to working roll cold rolling production technical fields, and in particular to a kind of cold roll operating condition inline diagnosis method.The cold roll operating condition inline diagnosis method, comprising the following steps: 1) roll under force mode, electrical system control milling train is pressed against to calibration roll-force, and fore side and transmission side AGC cylinder pressure are equal；2) electrical system control milling train is with the rotation of v=240m/min speed, and after milling train velocity-stabilization, it is target that electrical system, which is equal to 0 with the roll-force difference of driving side and fore side AGC hydraulic cylinder, finely tunes respective hydraulic cylinder travel；3) in the electrical system continuous acquisition 10s period transmission side roll-force Pds and fore side roll-force Pos difference Pdif；Pdif=Pds-Pos can determine whether that this meets stable rolling requirement to working roll circumferential direction uniformity of hardness, otherwise can determine whether that this is uneven to working roll circumferential direction hardness, is not able to satisfy stable rolling requirement if the amplitude A of Pdif is less than 20KN.The beneficial effect is that: roller surface is not destroyed, the additional production time is not take up.
Description
Technical field
The invention belongs to working roll cold rolling production technical fields, and in particular to a kind of cold roll operating condition inline diagnosis side
Method.
Background technique
Working roll plays a crucial role in cold rolling production, it is desired to which it has enough intensity, toughnesses and wearability
To bear high draught pressure and impact force, to improve the ability of working roll anti-crack and peeling；Work roll surface must have height
And uniform hardness, guarantee the dimensional accuracy and good surface quality of cold-strip and steel plate with this.
On roll machine it is previous as can be detected using turbine flaw detection or the nondestructive inspections mode such as ultrasonic examination and lacked inside roll
It falls into, and since surface hardness detection can destroy roller surface, so hardness determination can not be carried out after grinding.
As roll dressing diameter is smaller and smaller, roll hardness non-uniform phenomenon is increasingly severe.Roll circumferential and axial
Uniformity of hardness is very big on Rolling Production influence, and through practical proof, cold roll circumferential direction hardness drop is greater than 2HSD, rolling life
It will cause serious strip shape wave defect during producing；Cold roll axial stiffness drop is greater than 2HSD, Rolling Production process
In or occur the disconnected band rolling accident of sideslip.
Summary of the invention
In order to compensate for the shortcomings of the prior art, the present invention provides one kind to implement during checking after machine on roll,
And roller surface is not destroyed, it is not take up the cold roll operating condition inline diagnosis method of additional production time.
The present invention is achieved through the following technical solutions:
A kind of cold roll operating condition inline diagnosis method, after roll is fully enclosed milling train, in the case where rolling force mode, electrically
System control milling train is pressed against to calibration roll-force, and general value 1/2*Pmax (Pmax indicates milling train maximum rolling force) is grasped at this time
Make side and transmission side AGC cylinder pressure is equal, i.e. Pos=Pds=1/4*Pmax.
The rolling force mode is a kind of operating mode in the hydraulic pressure of rolling mill AGC, and in such a mode, fore side is hydraulic
Cylinder is equal in object synchronization pressure with two sides roll-force with transmission side hydraulic cylinder.
Under current pressing state, electrical system control milling train is with the rotation of v=240m/min speed, to milling train velocity-stabilization
Afterwards, it is target that electrical system, which is equal to 0 with the roll-force difference of transmission side and fore side AGC hydraulic cylinder, finely tunes respective hydraulic cylinder row
Journey；
After power difference to be rolled stablizes fluctuation on the basis of 0, transmission side rolls in the electrical system continuous acquisition 10s period
The difference Pdif, Pdif=Pds-Pos of power Pds processed and fore side roll-force Pos；
The amplitude A of Pdif is calculated, if amplitude A is less than 20KN, that is, can determine whether that this is full to working roll circumferential direction uniformity of hardness
Sufficient stable rolling requirement, otherwise can determine whether that this is uneven to working roll circumferential direction hardness, is not able to satisfy stable rolling requirement.
Electrical system acquires fore side AGC hydraulic cylinder travel Sos and transmission side AGC hydraulic cylinder travel Sds, calculates current
AGC Position of Hydraulic Cylinder difference Sdif=Sds-Sos after roller pressing.
Further, the difference S ', S ' of the AGC Position of Hydraulic Cylinder difference Sdif ' that Sdif and upper a pair of of working roll measure are calculated
=Sdif-Sdif ',
In formula, the AGC Position of Hydraulic Cylinder that Sdif work at present roller measures is poor, and Sdif ' is to measure with working roll the last time
AGC Position of Hydraulic Cylinder it is poor.
If Sdif is in [- 500um ,+500um] range, and S ' can determine whether in [- 300um ,+300um] range
This meets stable rolling requirement to working roll axial stiffness uniformity, otherwise can determine whether that this is uneven to working roll axial stiffness,
It is not able to satisfy stable rolling requirement.
It can sentence through above-mentioned steps if it is determined that working roll roller circumferential and axial uniformity of hardness is all satisfied rolling requirements
Breaking, this is good to working roll operating condition, can normally put into rolling and use.
The beneficial effects of the present invention are: a kind of cold roll operating condition inline diagnosis method of the present invention is based on AGC hydraulic cylinder
The corresponding relationship of flexible deformation occurs after being pressed against for stroke and milling train and milling train is pressed against AGC cylinder pressure in rotation process
The corresponding relationship of amplitude difference and roll circumferential direction hardness, provides the evaluation method of roll circumferential direction uniformity of hardness, 1) present invention mentions
The method of confession can be implemented during checking after machine on roll, will not occupy the additional production time；2) this method solve
The problem of working roll uniformity of hardness can not judge after grinding, perfect working roll operating condition judgement；3) this method passes through innovation
Roll hardness uniformity evaluating method is stablized for cold-rolling mill production and constructs new defence line, prevention deformed steel strip and rolling sideslip,
It improves work efficiency；4) this method is effective supplement to existing roll operating condition evaluation parameter, i.e. circularity, circle jump, roughness
Deng, have good generality, adaptability and portability, the diagnosis of all cold rolling mill work roller operating conditions can be suitble to.
Detailed description of the invention
The present invention will be further described below with reference to the drawings.
Attached drawing 1 is work flow diagram of the invention.
Specific embodiment
Attached drawing 1 is a kind of specific embodiment of the invention.A kind of cold roll operating condition inline diagnosis method of the invention, packet
It includes following steps: 1) rolling under force mode, electrical system control milling train is pressed against to calibration roll-force, fore side and transmission side AGC
Cylinder pressure is equal；
2) electrical system control milling train is with the rotation of v=240m/min speed, and after milling train velocity-stabilization, electrical system is to pass
It is target that the roll-force difference of dynamic side and fore side AGC hydraulic cylinder, which is equal to 0, finely tunes respective hydraulic cylinder travel；
3) in the electrical system continuous acquisition 10s period transmission side roll-force Pds and fore side roll-force Pos difference
Pdif；Pdif=Pds-Pos can determine whether that this is full to working roll circumferential direction uniformity of hardness if the amplitude A of Pdif is less than 20KN
Sufficient stable rolling requirement, otherwise can determine whether that this is uneven to working roll circumferential direction hardness, is not able to satisfy stable rolling requirement；
4) electrical system acquires fore side AGC hydraulic cylinder travel Sos and transmission side AGC hydraulic cylinder travel Sds, calculates current
AGC Position of Hydraulic Cylinder difference Sdif=Sds-Sos after roller pressing；The AGC that Sdif and upper a pair of of working roll measure is calculated simultaneously
The difference S ' (S '=Sdif-Sdif ') of Position of Hydraulic Cylinder difference Sdif ', if Sdif in [- 500um ,+500um] range, and
S ' can determine whether that this meets stable rolling requirement to working roll axial stiffness uniformity in [- 300um ,+300um] range, no
It then can determine whether that this is uneven to working roll axial stiffness, is not able to satisfy stable rolling requirement；
5) through above-mentioned steps, if it is determined that working roll roller circumferential and axial uniformity of hardness is all satisfied rolling requirements
Judge that this is good to working roll operating condition, can normally put into rolling and use.
Further, the milling train is pushed in rolling force mode by extremely calibration roll-force, general value And it protects
It holds fore side and transmission side AGC cylinder pressure is equal, i.e.,
Further, the amplitude A of the roll-force difference is, milling train is in v=240m/min speed rotation process, when 10s
Between in section the difference Pdif (Pdif=Pds-Pos) of transmission side roll-force Pds and fore side roll-force Pos amplitude.
Further, the AGC Position of Hydraulic Cylinder difference Sdif is transmission side AGC hydraulic cylinder travel Sds and fore side AGC liquid
The difference (Sds-Sos) of cylinder pressure stroke Sos.
Further, the S ' is that the AGC Position of Hydraulic Cylinder difference Sdif that work at present roller measures is measured with upper a pair of of working roll
AGC Position of Hydraulic Cylinder difference Sdif ' difference, S '=Sdif-Sdif '.
Further, the AGC Position of Hydraulic Cylinder difference Sdif is in [- 500um ,+500um] range, and S ' [- 300um ,+
300um] in range, that is, it can determine whether that this meets stable rolling requirement to working roll axial stiffness uniformity, otherwise can determine whether that this is right
Working roll axial stiffness is uneven, is not able to satisfy stable rolling requirement.
A kind of cold rolling mill work roller operating condition inline diagnosis method of the invention 1450 single stand reversible UCM cold-rolling mill of Mr. Yu
Production.Milling equipment parameter such as table 1:
| Device name | Parameter |
| Working roll size mm | φ385/φ340×1450 |
| Intermediate calender rolls size mm | φ440/φ390×1410 |
| Support roller size mm | φ1250/φ1100×1420 |
| Maximum rolling force KN | 18000 |
| AGC hydraulic cylinder range mm | 228 |
Table 1
It is arranged at the interface milling train HMI and corresponding electric automatization function is realized with lower button, such as table 2:
Table 2
Roll is fully enclosed after milling train, selection " the rolling force mode " at the interface HMI；
After model selection is completed, selection " pressure is up to calibration roll-force "；
Power to be rolled is stablized after 900 tons, selects " milling train rotation "；
Stablize after 240m/min to milling train velocity of rotation, selects " clearing of roll-force difference "；
After power difference to be rolled stablizes fluctuation on the basis of 0, selection " calculates roll-force amplitude difference ", obtains numerical value A；
" roll gap mark zero " is selected later, obtains numerical value Sdif；
" potential difference inspection " is selected later, obtains numerical value S '；
If SdifIn [- 500um ,+500um] range, and S ' can determine whether this in [- 300um ,+300um] range
Stable rolling requirement is met to working roll axial stiffness uniformity, otherwise can determine whether that this is uneven to working roll axial stiffness, no
It is able to satisfy stable rolling requirement.
If amplitude A is less than 20KN, that is, it can determine whether that this meets stable rolling requirement to working roll circumferential direction uniformity of hardness, it is no
It then can determine whether that this is uneven to working roll circumferential direction hardness, is not able to satisfy stable rolling requirement.
It can sentence through above-mentioned steps if it is determined that working roll roller is axial and axial stiffness uniformity is all satisfied rolling requirements
Breaking, this is good to working roll operating condition, can normally put into rolling and use, and otherwise there is deformed steel strip and rolling sideslip risk, cannot throw
Enter rolling to use.
The present invention is not limited to the above-described embodiments, anyone should learn make under the inspiration of the present invention with the present invention
With same or similar technical solution, fall within the scope of protection of the present invention.
Technology not described in detail in the present invention, shape, construction portion are well-known technique.
Claims (2)
1. a kind of cold roll operating condition inline diagnosis method, which comprises the following steps: 1) it rolls force mode under,
Electrical system control milling train is pressed against to calibration roll-force, and fore side and transmission side AGC cylinder pressure are equal；
2) under current pressing state, electrical system control milling train is with the rotation of v=240m/min speed, to milling train velocity-stabilization
Afterwards, it is target that electrical system, which is equal to 0 with the roll-force difference of transmission side and fore side AGC hydraulic cylinder, finely tunes respective hydraulic cylinder row
Journey；
3) after power difference to be rolled stablizes fluctuation on the basis of 0, transmission side is rolled in the electrical system continuous acquisition 10s period
The difference Pdif of power Pds and fore side roll-force Pos；Pdif=Pds-Pos can sentence if the amplitude A of Pdif is less than 20KN
Breaking, this meets stable rolling requirement to working roll circumferential direction uniformity of hardness, otherwise can determine whether that this is uneven to working roll circumferential direction hardness
It is even, it is not able to satisfy stable rolling requirement；
4) electrical system acquires fore side AGC hydraulic cylinder travel Sos and transmission side AGC hydraulic cylinder travel Sds, calculates current roll
AGC Position of Hydraulic Cylinder difference Sdif=Sds-Sos after pressing；Sdif is calculated simultaneously and the upper AGC that measures of a pair of working roll is hydraulic
Difference S ', S '=Sdif-Sdif ' of cylinder position difference Sdif ', if Sdif in [- 500um ,+500um] range, and S ' [-
300um ,+300um] in range, that is, it can determine whether that this meets stable rolling requirement to working roll axial stiffness uniformity, otherwise can sentence
Breaking, this is uneven to working roll axial stiffness, is not able to satisfy stable rolling requirement；
5) through above-mentioned steps, judge that working roll roller circumferential and axial uniformity of hardness is all satisfied rolling requirements, that is, can determine whether that this is right
Working roll operating condition is good, can normally put into rolling and use.
2. a kind of cold roll operating condition inline diagnosis method according to claim 1, it is characterized in that: the milling train is rolling
It is pressed against under force mode processed to calibration roll-force, general value And keep fore side and transmission side AGC hydraulic cylinder pressure
Power is equal, i.e., Pmax indicates milling train maximum rolling force.
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| CN110856859B (en) * | 2018-08-22 | 2021-05-07 | 上海梅山钢铁股份有限公司 | Hot continuous rolling back-up roll peeling on-line monitoring method |
| CN111112345B (en) * | 2019-12-25 | 2021-08-17 | 鞍钢集团自动化有限公司 | Control method for automatically compensating deviation generated by calibration of horizontal rolling mill |
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| SU1680398A1 (en) * | 1988-08-01 | 1991-09-30 | Ki I Avtomatiki Im Khkhu Sezda | Method of determining rolling stand rigidity value |
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| CN102601127A (en) * | 2012-03-19 | 2012-07-25 | 中冶南方工程技术有限公司 | High-precision strip shape control prediction method for CVC (continuously variable crown) four-roll cold rolling mill |
| CN102728625A (en) * | 2012-06-19 | 2012-10-17 | 江苏省沙钢钢铁研究院有限公司 | Rough mill force balance control (RMFBC) method for two sides of hot rolled strip steel reversing rough mill |
| CN104942020A (en) * | 2014-03-27 | 2015-09-30 | 上海梅山钢铁股份有限公司 | Wear compensation and self-adaption method for hot continuous rolling backup roller |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2583657B2 (en) * | 1990-10-17 | 1997-02-19 | 新日本製鐵株式会社 | Thickness deviation disturbance rejection control method |
| JP5381596B2 (en) * | 2009-10-08 | 2014-01-08 | トヨタ自動車株式会社 | Rolling equipment |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1680398A1 (en) * | 1988-08-01 | 1991-09-30 | Ki I Avtomatiki Im Khkhu Sezda | Method of determining rolling stand rigidity value |
| CN101507978A (en) * | 2009-03-20 | 2009-08-19 | 燕山大学 | Worker roller abrasion forecasting method of cold continuous rolling device based on mechanism and operation condition |
| CN102601127A (en) * | 2012-03-19 | 2012-07-25 | 中冶南方工程技术有限公司 | High-precision strip shape control prediction method for CVC (continuously variable crown) four-roll cold rolling mill |
| CN102728625A (en) * | 2012-06-19 | 2012-10-17 | 江苏省沙钢钢铁研究院有限公司 | Rough mill force balance control (RMFBC) method for two sides of hot rolled strip steel reversing rough mill |
| CN104942020A (en) * | 2014-03-27 | 2015-09-30 | 上海梅山钢铁股份有限公司 | Wear compensation and self-adaption method for hot continuous rolling backup roller |
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Address after: 276800 Shandong Province, Rizhao City Arashiyama District Shugang Avenue Applicant after: SHANDONG IRON AND STEEL GROUP RIZHAO CO., LTD. Address before: 276800 Ji'nan Road, Donggang District, Shandong, No. 396, No. Applicant before: SHANDONG IRON AND STEEL GROUP RIZHAO CO., LTD. |
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