CN107138541A - A kind of cold roll operating mode inline diagnosis method - Google Patents
A kind of cold roll operating mode inline diagnosis method Download PDFInfo
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- CN107138541A CN107138541A CN201710288435.4A CN201710288435A CN107138541A CN 107138541 A CN107138541 A CN 107138541A CN 201710288435 A CN201710288435 A CN 201710288435A CN 107138541 A CN107138541 A CN 107138541A
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- roll
- force
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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
- 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
-
- 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
The invention belongs to the cold rolling production technical field of working roll, and in particular to a kind of cold roll operating mode inline diagnosis method.The cold roll operating mode inline diagnosis method, comprises the following steps：1）Roll under force mode, electrical system control milling train is pressed against to demarcation roll-force, and fore side and transmission side AGC cylinder pressures are equal；2）Electrical system control milling train is rotated with v=240m/min speed, and after after milling train velocity-stabilization, electrical system is target equal to 0 with the roll-force difference of driving side and fore side AGC hydraulic cylinders, finely tunes respective hydraulic cylinder travel；3）Transmission side roll-force Pds and fore side roll-force Pos difference Pdif in the electrical system continuous acquisition 10s periods；Pdif=Pds Pos, if Pdif amplitude A is less than 20KN, you can judge that the circumferential uniformity of hardness of this pair of working roll meets stable rolling requirement, otherwise can determine whether that the circumferential hardness of this pair of working roll is uneven, it is impossible to meet stable rolling requirement.Its advantage is：Roller surface is not destroyed, the extra production time is not take up.
Description
Technical field
The invention belongs to the cold rolling production technical field of working roll, and in particular to a kind of cold roll operating mode inline diagnosis side
Method.
Background technology
Working roll plays vital effect in cold rolling production, it is desired to which it has enough intensity, toughness and wearability
To bear high draught pressure and impulsive force, with the ability for improving working roll anti-crack and peeling off；Work roll surface must have height
And uniform hardness, ensure 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 and lack inside roll using turbine flaw detection or the nondestructive inspection mode such as ultrasonic examination
Fall into, and because case hardness detection can destroy roller surface, so hardness determination can not be carried out after grinding.
As roll dressing diameter is less and less, roll hardness non-uniform phenomenon is increasingly severe.Roll circumferential and axial
Uniformity of hardness influences very big to Rolling Production, through practical proof, and cold roll circumference hardness drop is more than 2HSD, rolling life
Serious strip shape wave defect can be caused during production；Cold roll axial stiffness drop is more than 2HSD, Rolling Production process
In or occur sideslip broken belt rolling accident.
The content of the invention
The present invention implements to make up during the defect of prior art is checked there is provided one kind on roll after machine,
And roller surface is not destroyed, it is not take up the cold roll operating mode inline diagnosis method of extra production time.
The present invention is achieved through the following technical solutions：
A kind of cold roll operating mode inline diagnosis method, roll is fully enclosed after milling train, under rolling force mode, electrical system
Control milling train is pressed against to demarcation roll-force, general value 1/2*Pmax（Pmax represents milling train maximum rolling force）, now fore side
It is equal with transmission side AGC cylinder pressures, i.e. Pos=Pds=1/4*Pmax.
Described rolling force mode is a kind of mode of operation in rolling mill AGC hydraulic pressure pressure, in such a mode, transmission side hydraulic pressure
Cylinder is equal in object synchronization pressure with both sides roll-force with driving side hydraulic cylinder.
Under current pressing state, electrical system control milling train is rotated with v=240m/min speed, treats milling train velocity-stabilization
Afterwards, electrical system is target equal to 0 with the roll-force difference of driving side and fore side AGC hydraulic cylinders, finely tunes respective hydraulic cylinder row
Journey；
Power difference to be rolled is stablized on the basis of 0 after fluctuation, transmission side roll-force in the electrical system continuous acquisition 10s periods
Pds and fore side roll-force Pos difference Pdif, Pdif=Pds-Pos；
Pdif amplitude A is calculated, if amplitude A is less than 20KN, you can judge that the circumferential uniformity of hardness of this pair of working roll meets steady
Determine rolling requirements, otherwise can determine whether that the circumferential hardness of this pair of working roll is uneven, it is impossible to meet stable rolling requirement.
Electrical system acquisition operations side and transmission side AGC hydraulic cylinder travel Sos, Sds, are calculated after current roller pressing
AGC Position of Hydraulic Cylinder difference Sdif=（Sds-Sos）.
Further, the difference S ', S ' for the AGC Position of Hydraulic Cylinder difference Sdif ' that Sdif is measured with upper a pair of working rolls are calculated
=Sdif-Sdif ',
In formula, the AGC Position of Hydraulic Cylinder that Sdif work at present rollers are measured is poor, and Sdif ' is the last time in the AGC measured with working roll
Position of Hydraulic Cylinder is poor.
If Sdif is in the range of [- 500um ,+500um], and S ' is in the range of [- 300um ,+300um], you can judge
The uniform sexual satisfaction stable rolling requirement of this pair of working roll axial stiffness, otherwise can determine whether that this pair of working roll axial stiffness is uneven,
Stable rolling requirement can not be met.
Through above-mentioned steps, if it is determined that working roll roller circumferential and axial uniformity of hardness is satisfied by rolling requirements, you can sentence
Disconnected this pair of working roll operating mode is good, can normally put into rolling and use.
The beneficial effects of the invention are as follows：A kind of cold roll operating mode inline diagnosis method of the present invention is based on AGC hydraulic cylinders
The corresponding relation of elastic deformation occurs after being pressed against with milling train for stroke, and milling train is pressed against AGC cylinder pressures in rotation process
There is provided the evaluation method of the circumferential uniformity of hardness of roll, 1 for amplitude difference and the corresponding relation of the circumferential hardness of roll）The present invention is carried
The method of confession is implemented during being checked on roll after machine, will not take the extra production time；2）It this method solve
The problem of working roll uniformity of hardness can not judge after grinding, perfect working roll operating mode judges；3）This method passes through innovation
Roll hardness uniformity evaluating method, which is that cold-rolling mill production is stable, constructs new defence line, prevention deformed steel strip and rolling sideslip,
Improve operating efficiency；4）This method is effective supplement to existing roll operating mode evaluating, i.e. circularity, circle jump, roughness
Deng with good generality, adaptability and portability, the diagnosis of all cold rolling mill work roller operating modes can be adapted to.
Brief description of the drawings
The present invention is further illustrated below in conjunction with the accompanying drawings.
Accompanying drawing 1 is workflow diagram of the invention.
Embodiment
Accompanying drawing 1 is a kind of specific embodiment of the invention.A kind of cold roll operating mode inline diagnosis method of the invention, bag
Include following steps：1）Roll under force mode, electrical system control milling train is pressed against to demarcation roll-force, fore side and transmission side AGC
Cylinder pressure is equal；
2）Electrical system control milling train is rotated with v=240m/min speed, and after after milling train velocity-stabilization, electrical system is with driving side
It is target to be equal to 0 with the roll-force difference of fore side AGC hydraulic cylinders, finely tunes respective hydraulic cylinder travel；
3）Transmission side roll-force Pds and fore side roll-force Pos difference Pdif in the electrical system continuous acquisition 10s periods；
Pdif=Pds-Pos, if Pdif amplitude A is less than 20KN, you can judge that the circumferential uniformity of hardness of this pair of working roll meets stable
Rolling requirements, otherwise can determine whether that the circumferential hardness of this pair of working roll is uneven, it is impossible to meet stable rolling requirement；
4）Electrical system acquisition operations side and transmission side AGC hydraulic cylinder travel Sos, Sds, calculate the AGC after current roller pressing
Position of Hydraulic Cylinder difference Sdif=（Sds-Sos）；Calculating Sdif and the AGC Position of Hydraulic Cylinder that upper a pair of working rolls are measured are poor simultaneously
Sdif ' difference S '（ S’=Sdif -Sdif’）If, Sdif in the range of [- 500um ,+500um], and S ' [- 300um,
+ 300um] in the range of, you can judge the uniform sexual satisfaction stable rolling requirement of this pair of working roll axial stiffness, otherwise can determine whether this pair
Working roll axial stiffness is uneven, it is impossible to meet stable rolling requirement；
5）Through above-mentioned steps, if it is determined that working roll roller is axially satisfied by rolling requirements with axial stiffness uniformity, you can judge
This pair of working roll operating mode is good, can normally put into rolling and use.
Further, the milling train is pushed by extremely demarcation roll-force, general value 1/2*Pmax in rolling force mode, and is kept
Fore side and transmission side AGC cylinder pressures are equal, i.e. Pos=Pds=1/4*Pmax.
Further, the amplitude A of the roll-force difference is, milling train is with v=240m/min speed rotation processes, the 10s times
Transmission side roll-force Pds and fore side roll-force Pos difference Pdif in section（Pdif=Pds-Pos）Amplitude.
Further, the AGC Position of Hydraulic Cylinder difference Sdif is, transmission side AGC hydraulic cylinder travels Sds and fore side AGC liquid
Cylinder pressure stroke Sos difference（Sds-Sos）.
Further, the S ' is that the AGC Position of Hydraulic Cylinder difference Sdif that work at present roller is measured is measured with upper a pair of working rolls
AGC Position of Hydraulic Cylinder difference Sdif ' difference, S '=Sdif-Sdif '.
Further, the AGC Position of Hydraulic Cylinder difference Sdif is in the range of [- 500um ,+500um], and S ' [- 300um ,+
300um] in the range of, you can judge the uniform sexual satisfaction stable rolling requirement of this pair of working roll axial stiffness, otherwise can determine whether this pair
Working roll axial stiffness is uneven, it is impossible to meet stable rolling requirement.
A kind of cold rolling mill work roller operating mode inline diagnosis method of the invention is used for certain 1450 single stand reversible UCM cold-rolling mill
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 ranges mm | 228 |
Table 1
Arrange that following button realizes correspondence electric automatization function, such as table 2 at milling train HMI interfaces：
| Button name | Corresponding function |
| Roll force mode | A kind of mode of operation in rolling mill AGC hydraulic cylinder pressure is set, in such a mode, transmission side hydraulic cylinder is equal in object synchronization pressure with both sides roll-force with driving side hydraulic cylinder； |
| Pressure up to demarcates roll-force | Up to 900 tons of fore side and driving side hydraulic cylinder synchronous pressure； |
| Milling train is rotated | Milling train is rotated with setting speed v=240m/min； |
| Roll-force difference is reset | Driving side is target equal to 0 with roll-force difference with fore side AGC hydraulic cylinders, finely tunes respective hydraulic cylinder travel； |
| Calculate roll-force amplitude difference | Transmission side roll-force P in the electrical system continuous acquisition 10s periodsdsWith fore side roll-force PosDifference Pdif, and calculate PdifThe peak swing A, P of fluctuationdif=Pds-Pos； |
| Roll gap mark zero | Electrical system acquisition operations side and transmission side AGC hydraulic cylinder travels Sos、Sds, calculate both sides AGC Position of Hydraulic Cylinder difference Sdif=（Sds-Sos）； |
| Potential difference is examined | Calculate SdifThe AGC Position of Hydraulic Cylinder difference S measured with upper a pair of working rollsdif' difference S '. |
Table 2
Roll is fully enclosed after milling train, and " rolling force mode " is selected at HMI interfaces；
After model selection is completed, selection " pressure up to demarcates roll-force "；
Power to be rolled is stable after 900 tons, selects " milling train rotation "；
Treat that milling train velocity of rotation is stable after 240m/min, selection " roll-force difference is reset "；
Power difference to be rolled is on the basis of 0 after stable fluctuation, and selection " calculates roll-force amplitude difference ", obtains numerical value A；
" roll gap mark zero " obtains numerical value S for selection afterwardsdif；
" potential difference inspection " is selected afterwards, numerical value S ' is obtained;
If SdifIn the range of [- 500um ,+500um], and S ' is in the range of [- 300um ,+300um], you can judge this pair of work
Make the axial uniformity of hardness of roller and meet stable rolling requirement, otherwise can determine whether that this pair of working roll axial stiffness is uneven, it is impossible to full
Sufficient stable rolling requirement.
It is no if amplitude A is less than 20KN, you can judge that the circumferential uniformity of hardness of this pair of working roll meets stable rolling requirement
It then can determine whether that the circumferential hardness of this pair of working roll is uneven, it is impossible to meet stable rolling requirement.
Through above-mentioned steps, if it is determined that working roll roller is axially satisfied by rolling requirements with axial stiffness uniformity, you can sentence
Disconnected this pair of working roll operating mode is good, can normally put into rolling and use, and otherwise there is deformed steel strip and rolling sideslip risk, it is impossible to throw
Enter rolling to use.
The present invention is not limited to the above-described embodiments, anyone should learn the present invention enlightenment under make with the present invention
With same or like technical scheme, each fall within protection scope of the present invention.
The technology of the invention not being described in detail, shape, construction part are known technology.
Claims (6)
1. a kind of cold roll operating mode inline diagnosis method, it is characterised in that comprise the following steps：1）Roll under force mode,
Electrical system control milling train is pressed against to demarcation roll-force, and fore side and transmission side AGC cylinder pressures are equal；
2）Electrical system control milling train is rotated with v=240m/min speed, and after after milling train velocity-stabilization, electrical system is with driving side
It is target to be equal to 0 with the roll-force difference of fore side AGC hydraulic cylinders, finely tunes respective hydraulic cylinder travel；
3）Transmission side roll-force Pds and fore side roll-force Pos difference Pdif in the electrical system continuous acquisition 10s periods；
Pdif=Pds-Pos, if Pdif amplitude A is less than 20KN, you can judge that the circumferential uniformity of hardness of this pair of working roll meets stable
Rolling requirements, otherwise can determine whether that the circumferential hardness of this pair of working roll is uneven, it is impossible to meet stable rolling requirement；
4）Electrical system acquisition operations side and transmission side AGC hydraulic cylinder travel Sos, Sds, calculate the AGC after current roller pressing
Position of Hydraulic Cylinder difference Sdif=（Sds-Sos）；Calculating Sdif and the AGC Position of Hydraulic Cylinder that upper a pair of working rolls are measured are poor simultaneously
Sdif ' difference S '（ S’=Sdif -Sdif’）If, Sdif in the range of [- 500um ,+500um], and S ' [- 300um,
+ 300um] in the range of, you can judge the uniform sexual satisfaction stable rolling requirement of this pair of working roll axial stiffness, otherwise can determine whether this pair
Working roll axial stiffness is uneven, it is impossible to meet stable rolling requirement；
5）Through above-mentioned steps, judge working roll roller axially and axial stiffness uniformity is satisfied by rolling requirements, you can judge this pair
Working roll operating mode is good, can normally put into rolling and use.
2. a kind of cold roll operating mode 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 demarcation roll-force, general value 1/2*Pmax, and keeps fore side and transmission side AGC cylinder pressures
It is equal, i.e. Pos=Pds=1/4*Pmax.
3. a kind of cold roll operating mode inline diagnosis method according to claim 1, it is characterized in that：The roll-force is poor
The amplitude A of value is, milling train is with v=240m/min speed rotation processes, transmission side roll-force Pds and fore side in the 10s periods
Roll-force Pos difference Pdif（Pdif=Pds-Pos）Amplitude.
4. a kind of cold roll operating mode inline diagnosis method according to claim 1, it is characterized in that：The AGC hydraulic pressure
Cylinder position difference Sdif is, transmission side AGC hydraulic cylinder travels Sds and fore side AGC hydraulic cylinder travels Sos difference（Sds-Sos）.
5. a kind of cold roll operating mode inline diagnosis method according to claim 1, it is characterized in that：The S ' is current
The difference for the AGC Position of Hydraulic Cylinder difference Sdif ' that the AGC Position of Hydraulic Cylinder difference Sdif that working roll is measured is measured with upper a pair of working rolls
Value, S '=Sdif-Sdif '.
6. a kind of cold roll operating mode inline diagnosis method according to claim 1, it is characterized in that：The AGC hydraulic pressure
Sdif is in the range of [- 500um ,+500um] for cylinder position difference, and S ' is in the range of [- 300um ,+300um], you can judge this pair
The uniform sexual satisfaction stable rolling requirement of working roll axial stiffness, otherwise can determine whether that this pair of working roll axial stiffness is uneven, it is impossible to
Meet stable rolling requirement.
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| CN201710288435.4A CN107138541B (en) | 2017-05-24 | 2017-05-24 | A kind of cold roll operating condition inline diagnosis method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110856859A (en) * | 2018-08-22 | 2020-03-03 | 上海梅山钢铁股份有限公司 | Hot continuous rolling back-up roll peeling on-line monitoring method |
| CN111112345A (en) * | 2019-12-25 | 2020-05-08 | 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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| JPH04157009A (en) * | 1990-10-17 | 1992-05-29 | Nippon Steel Corp | Method for eliminating and controlling plate thickness deviation disturbance |
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| 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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2017
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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 |
| JPH04157009A (en) * | 1990-10-17 | 1992-05-29 | Nippon Steel Corp | Method for eliminating and controlling plate thickness deviation disturbance |
| 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 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110856859A (en) * | 2018-08-22 | 2020-03-03 | 上海梅山钢铁股份有限公司 | Hot continuous rolling back-up roll peeling on-line monitoring method |
| CN111112345A (en) * | 2019-12-25 | 2020-05-08 | 鞍钢集团自动化有限公司 | Control method for automatically compensating deviation generated by calibration of horizontal rolling mill |
| 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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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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