CN106975663A - Solve the problems, such as the milling train roll shifting control method of edge thickening - Google Patents
Solve the problems, such as the milling train roll shifting control method of edge thickening Download PDFInfo
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- CN106975663A CN106975663A CN201610027012.2A CN201610027012A CN106975663A CN 106975663 A CN106975663 A CN 106975663A CN 201610027012 A CN201610027012 A CN 201610027012A CN 106975663 A CN106975663 A CN 106975663A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/18—Automatic gauge control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
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Abstract
Field, more particularly to a kind of cold rolling roll shifting control method are rolled the present invention relates to metallurgical acid cleaning.A kind of milling train roll shifting control method for solving the problems, such as edge thickening, selectes edge monitored area first, and the board form data on strip width direction is obtained by monitoring；The average thickness obtained in edge monitored area is calculated according to board form data；When average thickness exceedes center dot thickness using new policy calculation roll shifting amount.The present invention to edge thickening section by being monitored, it is controlled when finding and thickening and occur using new shifting strategy, caused by keeping in the case that control datum mark does not change at present effective control hot rolling to carry out edge reflex action it is cold rolling roll after edge thickening wrinkle problem, both the problem of solving edge thickening, it in turn ensure that the stabilization of current control datum mark under overall condition, cold rolling process can be improved with the overall controlled level of plate difference, can be widely used for carrying out the cold mill complex of edge drop control using roll play pattern at present.
Description
Technical field
Field, more particularly to a kind of cold rolling roll shifting control method are rolled the present invention relates to metallurgical acid cleaning.
Background technology
The edge drop Edge Drop of cold-rolled products, referred to as side drops, also referred to as edge thinning, is the important of dimensional accuracy index
Parameter.As shown in figure 1, the traditional definition of edge drop is that thickness tA apart from edge 100mm positions is subtracted apart from edge 15mm
The thickness tB of position difference obtains △ HED=tA-tB；
But with the continuous improvement that current user is required product quality, traditional side drop definition, which has been difficult to meet, to be required, often
Occur that, when unit allocation requirement is fully achieved in the controlled level that conventional edge drops, user still can not be met to section configuration requirement
Situation.Therefore it is poor to same plate by edge drop Conceptual Extension in the cold mill complex of production high rim drop requirement at present, i.e., in strip
Heart dot thickness HCSubtract the thickness H apart from edge 15mm positions15Difference obtain same plate difference △ HCE=HC-H15；
Obtained parameter is calculated with this can really embody the difference in thickness in full plate wide scope, be to characterize unit precision controlling ability
Excellent measure.
In the world today advanced UCMW types or UCM types milling train dropped at edge/control with plate difference on it is main using feedback control system
System is carried out, and its major control thinking is as shown in Fig. 2 using working roll 2 or intermediate calender rolls pair with chamfering 1 or special arc
The edge thinning region of strip 3 is compensated to reduce edge depreciation, by taking such as Fig. 2 as an example, and chamfered area length is 175mm,
The chamfered area partial-length that contacts with the strip is designated as negative value in actual production process, and negative value is smaller, illustrates that chamfered area connects with strip
Contact portion point is longer.Meanwhile, the control of edge drop is distributed in up-down rollers, and up-down rollers can be according to the independent play of supplied materials situation.
But, there is also a distinct issues at present for such a control mode.Due to hot-rolled production process, in hot rolling
Edge reflex action point is easily being formed at edge about 30mm in supplied materials production process, i.e. edge 30mm positions thickness is compared with central point
Thickness is bigger so that in control process, there is unmatched situation with the control logic at edge 15mm, but due to user
The limitation of demand, it is impossible to be changed to using at 30mm be used as control datum mark.Although this hot rolling section material overall ratio is not high,
Edge thickening problem after easily generation correspondence position is cold rolling in current control system, the cold outgoing gauge of correspondence position is more than cold
Rear center's point position thickness is rolled, and shows as wrinkle class defect on the final product.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of milling train roll shifting control method for solving the problems, such as edge thickening, this method
By being monitored to edge thickening section, it is controlled when finding and thickening and occur using new shifting strategy, edge thickening section is logical
Later original shifting strategy is replied, and feedback adjustment roll shifting amount is carried out according to the data after rolling, control datum mark at present is being kept
15mm positions are cold rolling caused by edge reflex action at effective control incoming hot rolled slab 30mm in the case of not changing to roll rear edge increasing
Thick wrinkle problem, the problem of both solving edge thickening in turn ensure that the stabilization of current control datum mark under overall condition, can carry
High cold rolling process is with the overall controlled level of plate difference.
What the present invention was realized in：A kind of milling train roll shifting control method for solving the problems, such as edge thickening, is altered in setting edge thickening
Behind the edge monitored area of roller control, comprise the following steps：
S1, the board form data obtained on strip width direction is monitored by profile gauge；
S2, the average thickness obtained in edge monitored area is calculated according to board form dataThe average thicknessIncluding operation side
Portion monitored area average thickness HWSWith transmission side portion monitored area average thickness HDS,
Work as average thicknessWhen, then into step S3；
Work as average thicknessWhen, it is controlled using original roll shifting mode；
HCFor the center dot thickness of strip；
S3, is calculated by formula 1 according to board form data and obtains roll play calculated value Δ WR；When roll play calculated value Δ WR is less than 0
When take roll play value be Δ WR, when roll play calculated value Δ WR be more than or equal to 0 when take roll play value be 0, complete this
Roll shifting is controlled；
Δ WR=- { MAX ((HWS-HC), (HDS-HC))*β+m} (1)
In formula, β rule of thumb obtains to thicken penalty coefficient；
M is the equal numerical constant of daily play, is taken according to daily play average of the same unit homologous series product in rolling
.
The step of also including feedback control after the step S3, after being controlled using roll play value, when monitoring to roll
Steel edge portion thickness deviation values after systemThen return to step S3, and makingAgain counted using formula 1
Calculate roll play calculated value；
HWS' it is thickness after the rolling of fore side primary side portion detection zone；
HDS' it is thickness after the rolling of transmission side primary side portion detection zone；
HC' it is strip center dot thickness after rolling.
First, second and third frame is selected as roll shifting in the edge thickening roll shifting control and controls frame, wherein when the first frame
When roll play value is taken as Δ WR, the roll play value of the second frame is the 80% of the first frame, the roll play value of the 3rd frame
For the 60% of the first frame.
The edge monitored area is apart from 25~30mm of band steel edge region.
With average thicknessStrip section for edge thickening section, work as average thicknessWhen, before edge thickening section
It is controlled at 50m using the obtained roll play values of step S3.
With average thicknessStrip section be edge thickening section, continuous 50m is remained after edge thickening section
When, after edge thickening section is by milling train roll shifting position, milling train is returned to original roll shifting mode and is controlled.
In the step S3, the value for thickening penalty coefficient β is -2~-6.
The present invention solves the problems, such as the milling train roll shifting control method of edge thickening by being monitored to edge thickening section, when discovery is thickened
Be controlled during appearance using new shifting strategy, edge thickening section replys original shifting strategy by rear, and according to rolling after
Data carry out feedback adjustment roll shifting amount, are keeping effectively controlling in the case that control datum mark 15mm positions do not change at present
It is cold rolling caused by edge reflex action at incoming hot rolled slab 30mm processed to roll rear edge thickening wrinkle problem, both solved asking for edge thickening
Topic, in turn ensure that the stabilization of current control datum mark under overall condition, can improve cold rolling process with the overall control water of plate difference
It is flat, it can be widely used for carrying out the cold mill complex of edge drop control using roll play pattern at present, in Present Global electrical steel product
Under producing line constantly newly-increased background, technology proposed by the invention has open market prospects.
Brief description of the drawings
Fig. 1 is that existing edge drop defines schematic diagram；
Fig. 2 is existing roll shifting control principle drawing；
Fig. 3 solves the problems, such as the FB(flow block) of the milling train roll shifting control method of edge thickening for the present invention.
In figure：1 chamfering, 2 working rolls, 3 strips.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.It should be understood that these embodiments be merely to illustrate the present invention without
For limiting the scope of the present invention.In addition, it is to be understood that after the content of the invention stated has been read, those skilled in the art can
To be made various changes or modifications to the present invention, these equivalent form of values equally fall within the model that the application appended claims are limited
Enclose.
Embodiment 1
A kind of milling train roll shifting control method for solving the problems, such as edge thickening, in the edge monitored area of setting edge thickening roll shifting control
Afterwards, comprise the following steps：
In this embodiment, according to hot rolling characteristic, edge monitored area is set as apart from strip both sides of the edge 25~30mm of position
Place, so chooses and is because while that reflex action point is main in 30mm positions, but actually has certain deviation, while considering further that measurement
System deviations etc., therefore choose certain limit and take its average value；
S1, the board form data obtained on strip width direction is monitored by profile gauge；After hot rolled coil pickling, corresponding hot rolled coil breaks
Face can be monitored by supplied materials profile gauge, under normal circumstances monitor position include the side portion 5mm of incoming hot rolled slab two, 10mm,
15mm, 20mm, 25mm, 30mm, 50mm, 75mm, 100mm, 125mm, 200mm, 300mm and center position；
S2, the average thickness obtained in edge monitored area is calculated according to board form dataWhen calculating by the fore side and biography of strip
Dynamic side is calculated respectively, the average thicknessIncluding operation side portion monitored area average thickness HWSWith transmission side portion monitoring section
Domain average thickness HDS,
Work as average thicknessWhen, then into step S3；
Work as average thicknessWhen, it is controlled using original roll shifting mode；
HCFor the center dot thickness of strip；
Thickening phenomenon, which occurs, in any side i.e. in both sides will enter the new control strategy that step S3 is used；
S3, is calculated by formula 1 according to board form data and obtains roll play calculated value Δ WR；When roll play calculated value Δ WR is less than 0
When take roll play value be Δ WR, when roll play calculated value Δ WR be more than or equal to 0 when take roll play value be 0, complete this
Roll shifting is controlled；
Δ WR=- { MAX ((HWS-HC), (HDS-HC))*β+m} (1)
In formula, m is the equal numerical constant of daily play, is taken according to daily play average of the same unit homologous series product in rolling
, its size is mainly related from the incoming hot rolled slab overall condition of different units, and incoming hot rolled slab convexity average is smaller, and this parameter is got over
Small, constant m values are general between 60~100, meanwhile, in same unit, the equal proportion convexity of different series product is altered
Dynamic value is also differed；
In the present embodiment, when using five Stands Cold Tandem Mills, selection first in edge thickening roll shifting control,
2nd, three frames control frame as roll shifting, wherein when the roll play value of the first frame is taken as Δ WR, and the second frame is rolled
Roller play value is the 80% of the first frame, and the roll play value of the 3rd frame is the 60% of the first frame；It is 90, explanation to take m values
When the first frame working roll play value is maintained under -90mm hot-rolling state, with incoming hot rolled slab 2.5mm thickness, convexity is 30
μm when, now during cold rolling exit thickness 0.5mm, corresponding same plate difference be 6 μm.In the case of this 30 μm with 6 μm
Ratio is 5:1,5 with supplied materials thickness 2.5mm and 0.5mm:1 is consistent, illustrates the effect of play cold rolling in the case just
Counteract edge thinning phenomenon caused by cold rolling control process itself so that incoming hot rolled slab the ratio such as maintains in cold rolling rear edge thickness
Example control；
β rule of thumb obtains to thicken penalty coefficient；It is determined that after m, being set to parameter beta, β value is to thicken compensation
Coefficient, span is between -2~-6.
The step of S4, feedback control, after being controlled using roll play value, steel edge portion thickness deviation values after rolling is monitoredWhen, then return to step S3, and makingAgain roll play calculated value is calculated using formula 1；
HWS' it is thickness after the rolling of fore side primary side portion detection zone；
HDS' it is thickness after the rolling of transmission side primary side portion detection zone；
HC' it is strip center dot thickness after rolling.
In the utility model, on the time-switching point that edge thickening control is controlled with original roll shifting is implemented, with average thicknessStrip section for edge thickening section, work as average thicknessWhen, using step at 50m before edge thickening section
The roll play value that S3 is obtained is controlled, and the time is altered to retain enough working rolls time；
In the utility model, with average thicknessStrip section be edge thickening section, it is continuous after edge thickening section
50m is remainedWhen, after edge thickening section is by milling train roll shifting position, milling train is returned to original roll shifting mode and entered
Row control, i.e., after edge monitored area thickening phenomenon does not occur for continuous 50m, the data recovery that roll shifting is controlled to original roll shifting
Mode is controlled.
By taking certain 5 Stands Cold Tandem Mill as an example：
Its incoming hot rolled slab center dot thickness is 2.5mm, and cold rolling exit thickness is 0.5mm, and it ensures in series A production
The equal numerical constant m values of daily play of equal proportion Crown control are 83, thicken penalty coefficient β values -2.In its production process
In：
1st, profile data monitoring is carried out to hot rolled plate after pickling by profile gauge, while to both sides 25mm and 30mm position thickness
Data carry out statistical and extracted its average, and fore side 25mm position thickness and fore side 30mm positions thickness, which are taken, is worth Hws
For 2503 μm, transmission side 25mm position thickness and transmission side 30mm positions thickness, which are taken, is worth HdsFor 2508 μm, by Hws
With HdsWith center dot thickness Hc2500 μm are contrasted.
2、HwsWith HdsWith center dot thickness HcCompared to being all higher than Hc, it is 8 μm to take the maximum in two differences.
3rd, correspondence abnormal section switches to feedforward control in 50m positions by located in connection before frame is entered from former feedback control procedures
Processing procedure sequence.
4th, in this regard, using the data measured by incoming hot rolled slab convexity measuring device before milling train, calculating the roll play value under feed-forward process
It is as follows：
Δ WR=- { MAX ((HWS-HC), (HDS-HC))*β+m} (1)
It is -67mm, the second frame and the 3rd frame that the first frame shifting amount under feedforward control program is calculated according to formula 1
According to corresponding 100:80:60 ratios are -54mm and -40mm.
5th, feed-forward process is carried out after shifting amount resends, the first to the 3rd frame shifting amount from original -100mm, -80mm, -
60mm positions play extremely -67mm, -54mm, -40mm positions.
6th, during feedforward control, find in abnormal section 20m positions, to fore side 25mm position thickness and fore side
30mm positions thickness, which takes, is worth HwsFor 2506 μm, transmission side 25mm position thickness is taken with transmission side 30mm positions thickness
It is worth HdsFor 2510 μm, accordingly thickening situation, abnormal section is become apparent from than before, therefore shifting amount output valve recalculate
A frame shifting amount under to feedforward control program is -63mm, and two frames are to three frames according to corresponding 100:80:60 ratios for-
50mm and -38mm.
7th, feed-forward process is carried out after shifting amount resends, and the first to the 3rd frame shifting amount is from original -67mm, -54mm, -40mm
Position play extremely -63mm, -50mm, -38mm positions.
8th, while step S3 of the present invention is put into, subsequent hot rolled volume fractograph analysis is still underway, and corresponding data was calculated
The abnormal section rice common 30m of number is being obtained in journey, the continuous 50m after 30m is no abnormal, so 30m crosses phase after milling train
Answer control program to be restored back to original roll shifting mode to be controlled.
Claims (6)
1. a kind of milling train roll shifting control method for solving the problems, such as edge thickening, it is characterized in that, in setting edge thickening roll shifting control
Edge monitored area after, comprise the following steps：
S1, the board form data obtained on strip width direction is monitored by profile gauge；
S2, the average thickness obtained in edge monitored area is calculated according to board form dataThe average thicknessIncluding operation side
Portion monitored area average thickness HWSWith transmission side portion monitored area average thickness
Work as average thicknessWhen, then into step S3；
Work as average thicknessWhen, it is controlled using original roll shifting mode；
HCFor the center dot thickness of strip；
S3, is calculated by formula 1 according to board form data and obtains roll play calculated value Δ WR；When roll play calculated value Δ WR is less than 0
When take roll play value be Δ WR, when roll play calculated value Δ WR be more than or equal to 0 when take roll play value be 0, complete this
Roll shifting is controlled；
Δ WR=- { MAX ((HWS-HC), (HDS-HC))*β+m} (1)
In formula, β rule of thumb obtains to thicken penalty coefficient；
M is the equal numerical constant of daily play, is taken according to daily play average of the same unit homologous series product in rolling
.
2. the milling train roll shifting control method as claimed in claim 1 for solving the problems, such as edge thickening, it is characterized in that：The step
The step of also including feedback control after S3, after being controlled using roll play value, steel edge portion after rolling is monitored
Thickness deviation valuesWhen, then return to step S3, and makingAgain roll play meter is calculated using formula 1
Calculation value；
HWS' it is thickness after the rolling of fore side primary side portion detection zone；
HDS' it is thickness after the rolling of transmission side primary side portion detection zone；
HC' it is strip center dot thickness after rolling.
3. the milling train roll shifting control method as claimed in claim 1 or 2 for solving the problems, such as edge thickening, it is characterized in that：It is described
First, second and third frame is selected in edge thickening roll shifting control as roll shifting and controls frame, wherein when the roll play of the first frame
When value is taken as Δ WR, the roll play value of the second frame is the 80% of the first frame, and the roll play value of the 3rd frame is the first machine
The 60% of frame.
4. the milling train roll shifting control method as claimed in claim 1 or 2 for solving the problems, such as edge thickening, it is characterized in that：It is described
Edge monitored area is apart from 25~30mm of band steel edge region.
5. the milling train roll shifting control method as claimed in claim 1 or 2 for solving the problems, such as edge thickening, it is characterized in that：With flat
Equal thicknessStrip section for edge thickening section, work as average thicknessWhen, used before edge thickening section at 50m
The roll play value that step S3 is obtained is controlled.
6. the milling train roll shifting control method as claimed in claim 1 or 2 for solving the problems, such as edge thickening, it is characterized in that：With flat
Equal thicknessStrip section be edge thickening section, continuous 50m is remained after edge thickening sectionWhen, on side
After portion thickens section by milling train roll shifting position, milling train is returned to original roll shifting mode and is controlled.
The milling train roll shifting control method as claimed in claim 1 or 2 for solving the problems, such as edge thickening, it is characterized in that：The step S3
In, the value for thickening penalty coefficient β is -2~-6.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107552574A (en) * | 2017-10-24 | 2018-01-09 | 云南钛业股份有限公司 | A kind of method for improving cold rolled titanium roll lumber recovery |
| CN107824617A (en) * | 2017-09-26 | 2018-03-23 | 北京科技大学 | A kind of asynchronous roll shifting control method for hot continuous rolling downstream frame working roll |
| CN109425319A (en) * | 2017-08-25 | 2019-03-05 | 宝山钢铁股份有限公司 | A method of detection acid cleaning process is to lateral section influence degree |
| CN110479770A (en) * | 2019-08-07 | 2019-11-22 | 武汉钢铁有限公司 | A kind of optimal control method of mill plate shape |
| CN111438197A (en) * | 2019-01-16 | 2020-07-24 | 宝山钢铁股份有限公司 | Control method for edge reverse warping of strip steel section |
| CN112934977A (en) * | 2019-11-26 | 2021-06-11 | 宝山钢铁股份有限公司 | Same-plate difference improvement method adopting edge multipoint control |
| CN114505353A (en) * | 2022-01-29 | 2022-05-17 | 宝钢湛江钢铁有限公司 | Same-plate difference roll shifting feedforward static control method |
| CN114505352A (en) * | 2022-01-29 | 2022-05-17 | 宝钢湛江钢铁有限公司 | Same-plate differential roller shifting feed-forward dynamic control method |
| CN114535311A (en) * | 2021-11-18 | 2022-05-27 | 北京科技大学 | Control method for hot rolling W-shaped section of wide aluminum plate strip |
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| CN109425319A (en) * | 2017-08-25 | 2019-03-05 | 宝山钢铁股份有限公司 | A method of detection acid cleaning process is to lateral section influence degree |
| CN107824617A (en) * | 2017-09-26 | 2018-03-23 | 北京科技大学 | A kind of asynchronous roll shifting control method for hot continuous rolling downstream frame working roll |
| CN107824617B (en) * | 2017-09-26 | 2019-06-21 | 北京科技大学 | A kind of asynchronous roll shifting control method for hot continuous rolling downstream rack working roll |
| CN107552574A (en) * | 2017-10-24 | 2018-01-09 | 云南钛业股份有限公司 | A kind of method for improving cold rolled titanium roll lumber recovery |
| CN111438197B (en) * | 2019-01-16 | 2021-05-14 | 宝山钢铁股份有限公司 | Control method for edge reverse warping of strip steel section |
| CN111438197A (en) * | 2019-01-16 | 2020-07-24 | 宝山钢铁股份有限公司 | Control method for edge reverse warping of strip steel section |
| CN110479770A (en) * | 2019-08-07 | 2019-11-22 | 武汉钢铁有限公司 | A kind of optimal control method of mill plate shape |
| CN112934977A (en) * | 2019-11-26 | 2021-06-11 | 宝山钢铁股份有限公司 | Same-plate difference improvement method adopting edge multipoint control |
| CN114535311A (en) * | 2021-11-18 | 2022-05-27 | 北京科技大学 | Control method for hot rolling W-shaped section of wide aluminum plate strip |
| CN114535311B (en) * | 2021-11-18 | 2023-01-06 | 北京科技大学 | Control method for hot rolling W-shaped section of wide aluminum plate strip |
| CN114505353A (en) * | 2022-01-29 | 2022-05-17 | 宝钢湛江钢铁有限公司 | Same-plate difference roll shifting feedforward static control method |
| CN114505352A (en) * | 2022-01-29 | 2022-05-17 | 宝钢湛江钢铁有限公司 | Same-plate differential roller shifting feed-forward dynamic control method |
| CN114505352B (en) * | 2022-01-29 | 2023-08-01 | 宝钢湛江钢铁有限公司 | Same-plate-difference channeling roll feedforward dynamic control method |
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