CN109759453A - A kind of board-shape control method of Cold tandem mill strip steel width dynamic variable specification - Google Patents
A kind of board-shape control method of Cold tandem mill strip steel width dynamic variable specification Download PDFInfo
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- CN109759453A CN109759453A CN201910164436.7A CN201910164436A CN109759453A CN 109759453 A CN109759453 A CN 109759453A CN 201910164436 A CN201910164436 A CN 201910164436A CN 109759453 A CN109759453 A CN 109759453A
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Abstract
The invention discloses a kind of board-shape control methods of Cold tandem mill strip steel width dynamic variable specification, comprising the following steps: in Cold tandem mill strip steel width dynamic variable specification control process, intermediate roll shifting mode is double fragmentation progress；A roll shifting is respectively executed with regional location after weld seam before weld seam of the intermediate calender rolls play respectively between two coiled strip steel of front and back.Implement intermediate roll shifting mode in two steps on forward and backward coiled strip steel, and combine the combination control tactics with corner flowt, improves the control effect of working roll, intermediate roll bending, keep cold-rolled steel coils controlled in the transitional belt plate shape of width；It realizes the ability for improving on-line tuning plate shape, achievees the purpose that continuous rolling, while reducing the quantity of abnormal off-line roll indirectly, improve unit lumber recovery.
Description
Technical field
The present invention relates to technical field of steel rolling, more particularly, to a kind of plate shape of Cold tandem mill strip steel width dynamic variable specification
Control method.
Background technique
Six roller cold continuous rollings are the common milling trains configured in pickling and cold-rolling Unit erriger；In the unit, due to using
Endless rolling, hot rolled coil continuously enter cold mill complex by entrance welder, maintain milling train by the adjusting of loop
Continuing high-speed rolling, the process that the threading of every coil, acceleration and deceleration and whipping is omitted not only increases the yield of unit in this way,
Also it has been obviously improved the quality of product, but has also brought the problem of needing dynamic mapping specification simultaneously.
The stability of dynamic variable specification process rolling parameter is for realizing that Fully continuous rolling has very important meaning
Justice.Cold rolling dynamic variable specification is divided into different steel grade, thickness difference and three kinds of situations of different size, of different size more.
The function of Strip Shape Control dynamic setting is by working roll, intermediate roll bending, the intermediate calender rolls play etc. to each rack
The dynamic regulation of parameter implements online roller shape adjustment, to realize that reach plate shape to the Strip Shape Control of different size strip good.
As shown in Fig. 1 six-high cluster mill roller, roll shifting schematic diagram, work roll bending Fw is by acting on the work roll bending of working roll bearing block
Roller power carries out the adjusting of roller shape, is mainly used for controlling the shape of strip, opposite side wave, the adjustment effect of middle unrestrained flatness defect are aobvious
It writes；Bending roller force increase is able to suppress the generation of side wave；Intermediate roll bending Fi is by acting on the intermediate roll bending of intermediate roll bearing seat
Power carries out the adjusting of roller shape, is mainly used for controlling the middle part shape of strip, opposite side wave, the adjustment effect of middle unrestrained flatness defect are obvious
It is weaker than work roll bending, but can be used cooperatively with work roll bending and be lacked for complex panel shape (complex seas in a quarter wave, side)
It falls into and is adjusted；Intermediate calender rolls play implements the mobile adjusting in lateral position to intermediate calender rolls by the traversing hydraulic cylinder of intermediate calender rolls play, with
Intermediate calender rolls play change in location, milling train lateral stiffness will also change, when rolling, rolls when δ value is located at a certain specific position
Machine has maximum lateral stiffness, and the stability of Strip Shape Control is best at this time, is changed in actual production according to strip width, makes it
Traversing to optimal position.And for fixed milling train δ value relative position also substantially constant.δ value is steel edge portion and the intermediate calender rolls body of roll
The relative position (such as Fig. 2) of end, theoretically, as δ > 0, strip generates side wave；As δ < 0, wave in strip generation；Work as δ
When=0, strip is straight；So as the change belt plate shape of relative position δ will also change.
It is existing with four rack UCM of certain 1720mm Total continuity, six roller tandem mills for example:
Product specification:
Thickness: 0.3~3.0mm of raw material 1.5~5.5mm finished product
Width: 900~1575mm of raw material 920~1600mm finished product
Intermediate calender rolls play parameter:
Axial float power: 100ton
Axial float stroke: each rack intermediate calender rolls play stroke is 500mm
Channeling move speed: Min 2mm/s, Max 15mm/s
Work roll bending power: (roller, the roller on the contrary that is negative so that the direction mutually deviated from roll neck is positive)
Positive bending roller force: each bearing block of Max 36ton/
Negative bending roller force: each bearing block of Max 18ton/
Intermediate calender rolls bending roller force:
Positive bending roller force: each bearing block of Max 50ton/
Implementing measure of the prior art for width dynamic variable specification are as follows:
1, the dynamic variable specification when width of front and back coil of strip is by narrow broaden: with strip width 1000mm → strip width
For 1250mm:
By L=Lm-B/2-50, (in formula: the traversing hydraulic cylinder of Lm-limits length, and different Continuous mill trains is because of working roll roller
Body length is different, and the middle roll shift hydraulic cylinder model of selection is different, and Lm is also different, B-strip width；50- steel edge portion with
The relative position δ of intermediate calender rolls body of roll end, different Continuous mill trains can also have setting variation) middle roll shift hydraulic cylinder travel
Calculation formula calculates, and current coiled strip steel width 1000mm, next coiled strip steel width 1250mm, then intermediate calender rolls are altered when dynamic variable specification
Traversing hydraulic cylinder travel L is moved, needs to be moved to 162.5mm from 287.5mm, play stroke is 125mm.Play stroke 125mm
Before weld seam enters milling train, all implement to complete on the strip of width 1000mm.
The problem of this method, is, when completing intermediate calender rolls play, the feelings that δ width corresponding with strip in relative position is not inconsistent occur
Condition: i.e. on width 1000mm strip it is corresponding be width 1250mm strip δ value, δ value will be significantly greater than setting value, this feelings
Strip will generate serious side wave defect under condition, and the positive bending roller force of working roll, which is adjusted to the upper limit (Max 36ton), also can not effectively change
It is kind, (1/4 wave+middle wave) compound shape wave will be generated again by increasing intermediate calender rolls bending roller force, whole process belt plate shape, which is in, to be lost
Steady state.
2, the width of front and back coil of strip is dynamic variable specification when narrowing from the width: with strip width 1500mm → strip width
For 1219mm:
By L=Lm-B/2-50, (in formula: the traversing hydraulic cylinder of Lm-limits length, and different Continuous mill trains is because of working roll roller
Body length is different, and the middle roll shift hydraulic cylinder model of selection is different, and Lm is also different, B-strip width；50- steel edge portion with
The relative position δ of intermediate calender rolls body of roll end, different Continuous mill trains can also have setting variation) middle roll shift hydraulic cylinder travel
Calculation formula calculates, and current coiled strip steel width 1500mm, next coiled strip steel width 1219mm, then intermediate calender rolls are altered when dynamic variable specification
Traversing hydraulic cylinder travel L is moved, needs to be moved to 178mm from 37.5mm, play stroke is 140.5mm.Play stroke 140.5mm
After weld seam enters milling train, all implement to complete on the strip of width 1219mm.
The problem of this method, is, before intermediate calender rolls play, there is a situation where relative position δ width corresponding with strip not to be inconsistent:
I.e. on width 1219mm strip it is corresponding be width 1500mm strip δ value, δ value will be significantly greater than setting value, such case
Lower strip will equally generate serious side wave defect, and the positive bending roller force of working roll is adjusted to the upper limit (Max 36ton) also can not be effective
Improve, (1/4 wave+middle wave) compound shape wave will be generated again by increasing intermediate calender rolls bending roller force, whole process belt plate shape is in
Instability status.
Above-mentioned width dynamic variable specification is all to take one-time continuous roll shifting mode, i.e. intermediate calender rolls play is in same coiled strip steel
Upper completion (such as Fig. 3).There are problems for this method: for strip in the case where change width is big, intermediate calender rolls play cannot be promptly and accurately
Into predeterminated position, causes working roll, intermediate calender rolls bending roller force beyond roller shape adjustment capability, be not able to satisfy dynamic variable specification and rolled
To the control requirement of the practical convexity of roll and actural deflection in journey, so that belt plate shape be caused to deteriorate, Yi Fasheng rolls the accident of wearing.
The existing another measure taken is, for strip width jump >=150mm, during avoiding continuous rolling
Roll the accident of wearing because belt plate shape can not effectively adjust, it is necessary to shut down threading and by middle roll shift hydraulic cylinder play extremely
Corresponding strip width position, then restart milling train and restore continuous rolling.The problem of measure is necessary production line stop, quilt
Compel to reduce effective operation time；And once shut down, when resuming production, necessarily lead to the waste product that at least 3 tons of thickness is not inconsistent every time.
Summary of the invention
In view of the shortcomings of the prior art, technical problem to be solved by the invention is to provide a kind of Cold tandem mill strip steel width to move
State becomes the board-shape control method of specification, to achieve the purpose that improve the ability of on-line tuning plate shape.
In order to solve the above-mentioned technical problem, the technical scheme adopted by the invention is as follows:
The board-shape control method of the Cold tandem mill strip steel width dynamic variable specification, comprising the following steps:
In Cold tandem mill strip steel width dynamic variable specification control process, intermediate roll shifting mode is double fragmentation progress；
A roll shifting is respectively executed with regional location after weld seam before weld seam of the intermediate calender rolls play respectively between two coiled strip steel of front and back.
Preferably, the board-shape control method the following steps are included:
1) the automatic roll shifting mode of intermediate calender rolls is closed；2) the full row of middle roll shift hydraulic cylinder is calculated according to reciprocity roll shifting mode
Journey L；3) at weld pitch milling train 30m, 1/2*L play value is executed；4) after weld seam feed mill, then intermediate calender rolls 1/2*L play is executed
Value；5) restore the automatic roll shifting mode of intermediate calender rolls, milling train continuous rolling.
It is described intermediate calender rolls play execution before, adjusting control first is compensated to bending roller force.
In the board-shape control method, in width of steel coil by the control of " narrow to broaden " dynamic variable specification are as follows:
A, it is more than the dynamic variable specification of 150mm for strip width jump, in advance closes the automatic roll shifting mode of intermediate calender rolls,
Implement manual roll shifting mode；
B, 25-35mm first carries out the 1/2 traversing liquid of intermediate calender rolls play in advance manually on narrow specification width before weld seam enters milling train
The play stroke of cylinder pressure stroke；At this time since steel edge portion and the relative position δ of intermediate calender rolls body of roll end are greater than setting position, band
Steel will generate bilateral wave, can first pass through in advance and increase the positive bending roller force implementation control of working roll；
C, after weld seam enters milling train, the 1/2 traversing hydraulic cylinder travel of intermediate calender rolls play is executed again manually in wide specification strip steel
Play stroke；At this time since steel edge portion and the relative position δ of intermediate calender rolls body of roll end are less than setting position, strip will be produced
Unrestrained in life, first pass through reduces the positive bending roller force of working roll in advance is controlled this；
D, after the completion of dynamic variable specification, by intermediate roll shifting pattern recovery to automatic mode.
In the board-shape control method, in width of steel coil by the control of " width narrows " dynamic variable specification are as follows:
A, it is more than the dynamic variable specification of 150mm for strip width jump, in advance closes the automatic roll shifting mode of intermediate calender rolls,
Implement manual roll shifting mode；
B, 25-35mm first carries out 1/2 intermediate calender rolls play cross in advance manually in the wide specification strip steel of preceding volume before weld seam enters milling train
Move the play stroke of hydraulic cylinder travel；At this time since steel edge portion and the relative position δ of intermediate calender rolls body of roll end are less than setting position
Set, strip will generate in wave, first pass through in advance reduce the positive bending roller force of working roll this is controlled；
C, after weld seam enters milling train, the 1/2 traversing hydraulic cylinder of intermediate calender rolls play is executed again manually in the narrow specification strip steel of rear volume
The play stroke of stroke；At this time since steel edge portion and the relative position δ of intermediate calender rolls body of roll end are greater than setting position, strip will
Bilateral wave can be generated, can first pass through in advance and increase the positive bending roller force implementation control of working roll；
D, after the completion of dynamic variable specification, by intermediate roll shifting pattern recovery to automatic mode.
Wherein, in the board-shape control method, increase the positive bending roller force of working roll and reduce the range of the positive bending roller force of working roll
In the 20-30% of setting value.
In the board-shape control method between step c and d are as follows: pass through outlet plate profile instrument inspection in play implementation process
It surveys, plate shape observation progress manually intervention fine tuning in kind between rack, can quickly inhibit flatness defect.
Compared with prior art, the present invention having the advantage that
The board-shape control method design of the Cold tandem mill strip steel width dynamic variable specification rationally, divides on forward and backward coiled strip steel
Two steps implement intermediate roll shifting mode, and combine the combination control tactics with corner flowt, improve working roll, intermediate roll bending
The control effect of roller keeps cold-rolled steel coils controlled in the transitional belt plate shape of width；Realize the ability for improving on-line tuning plate shape,
Achieve the purpose that continuous rolling, overcome it is of the existing technology in front and back width of steel coil difference be more than 150mm dynamic variable specification feelings
Under condition, it can not accomplish the defect quickly and effectively controlled to cold rolled sheet shape defect；Improve on-line tuning of the coil of strip in width transition
The ability of plate shape, being not required to shutdown threading can be realized the production of width dynamic variable specification, while reducing abnormal off-line indirectly and rolling
The quantity of roller improves unit lumber recovery.
Detailed description of the invention
Content expressed by each width attached drawing of this specification and the label in figure are briefly described below:
Fig. 1 is milling train roller group schematic diagram of the present invention.
Fig. 2 is intermediate calender rolls different location respective panels shape schematic diagram of the present invention.
Fig. 3 is two kinds of contrast schematic diagrams of strip width dynamic variable specification of the present invention.
Fig. 4 is intermediate calender rolls play operating procedure schematic diagram of the present invention.
Specific embodiment
Below against attached drawing, by the description of the embodiment, making to a specific embodiment of the invention further details of
Explanation.
As shown in Figures 1 to 4, the board-shape control method of six roller Cold tandem mill strip steel width dynamic variable specifications, intermediate calender rolls are altered
Roller mode is double fragmentation progress, i.e. back zone before weld seam of the intermediate calender rolls play respectively between two coiled strip steel of front and back with weld seam
Domain position respectively executes a roll shifting.Before the execution of intermediate calender rolls play, to prevent play, there may be flatness defects in the process, in advance
The mode for first passing through corner flowt adjusting is implemented to control.
In present embodiment, L is the traversing hydraulic cylinder travel of intermediate calender rolls play, and δ is steel edge portion and the intermediate calender rolls body of roll
The relative position of end.
It further, is that (intermediate calender rolls play operating procedure is such as by the control of " narrow to broaden " dynamic variable specification in width of steel coil
Fig. 4 signal):
A, it is more than the dynamic variable specification of 150mm for strip width jump, in advance closes the automatic roll shifting mode of intermediate calender rolls,
Implement manual roll shifting mode；
B, weld seam enters before milling train about 30m and first carries out 1/2*L play stroke in advance manually on narrow specification width；At this time due to
Relative position δ is greater than setting position, and strip will generate bilateral wave, can first pass through in advance and increase the positive bending roller force (setting value of working roll
20~30%) implement control；
C, weld seam enters executes 1/2*L play stroke again manually in wide specification strip steel after milling train；At this time due to opposite position
δ is set less than setting position, strip will generate in wave, can first pass through in advance reduce the positive bending roller force of working roll (the 20 of setting value~
30%) implement control；
D, it is manually done in play implementation process by plate shape observation in kind between outlet plate profile instrument detection, rack
Pre- fine tuning, can quickly inhibit flatness defect；
E, after the completion of dynamic variable specification, by intermediate roll shifting pattern recovery to automatic mode.
Embodiment 1:
Previous coiled strip steel width 1000mm → latter coiled strip steel width 1250mm (" narrow to broaden " dynamic variable specification):
By L=Lm-B/2-50, (in formula: the traversing hydraulic cylinder of Lm-limits length, and different Continuous mill trains is because of working roll roller
Body length is different, and the middle roll shift hydraulic cylinder model of selection is different, and Lm is also different, B-strip width；50- steel edge portion with
The relative position δ of intermediate calender rolls body of roll end, different Continuous mill trains can also have setting variation) middle roll shift hydraulic cylinder travel
Calculation formula calculates, the traversing hydraulic cylinder travel L:(Lm=837.5mm of intermediate calender rolls play)
Before preceding a roll L=837.5-1000/2-50=287.5mm
Afterwards after a roll L=837.5-1250/2-50=162.5mm
Before pre- 1/2 L=L of roll shifting-(before L after-L)/2=287.5- (287.5-162.5)/2=225mm
Embodiment 2:
Previous coiled strip steel width 1219mm → latter coiled strip steel width 1500mm (" narrow to broaden " dynamic variable specification):
By L=Lm-B/2-50, (in formula: the traversing hydraulic cylinder of Lm-limits length, and different Continuous mill trains is because of working roll roller
Body length is different, and the middle roll shift hydraulic cylinder model of selection is different, and Lm is also different, B-strip width；50- steel edge portion with
The relative position δ of intermediate calender rolls body of roll end, different Continuous mill trains can also have setting variation) middle roll shift hydraulic cylinder travel
Calculation formula calculates, the traversing hydraulic cylinder travel L:(Lm=837.5mm of intermediate calender rolls play)
Before preceding a roll L=837.5-1219/2-50=178mm
Afterwards after a roll L=837.5-1500/2-50=37.5mm
Before pre- 1/2 L=L of roll shifting-(before L after-L)/2=178- (178-37.5)/2=107.75mm ≈ 108mm
It further, is that (intermediate calender rolls play operating procedure is such as by the control of " width narrows " dynamic variable specification in width of steel coil
Fig. 4 signal):
A, it is more than the dynamic variable specification of 150mm for strip width jump, in advance closes the automatic roll shifting mode of intermediate calender rolls,
Implement manual roll shifting mode；
B, weld seam, which enters before milling train about 30m and first carries out intermediate roll shifting 1/2*L in advance manually in the wide specification strip steel of preceding volume, alters
Dynamic stroke；At this time due to relative position δ be less than setting position, strip will generate in wave, can first pass through in advance reduce working roll just
Bending roller force (20~30% of setting value) implements control；
C, weld seam enters executes intermediate roll shifting 1/2*L play stroke again manually in the narrow specification strip steel of rear volume after milling train；
At this time since relative position δ is greater than setting position, strip will generate side wave, can first pass through in advance and increase the positive bending roller force of working roll
(the 20~30% of setting value) implement control；
D, plate shape observation in kind between plate profile instrument detection, rolling-mill housing is exported by milling train in play implementation process, carried out
Manually intervene fine tuning, can quickly inhibit flatness defect；
E, after the completion of dynamic variable specification, by intermediate roll shifting pattern recovery to automatic mode.
Embodiment 3:
Previous coiled strip steel width 1250mm → latter coiled strip steel width 1000mm (" width narrows " dynamic variable specification):
By L=Lm-B/2-50, (in formula: the traversing hydraulic cylinder of Lm-limits length, and different Continuous mill trains is because of working roll roller
Body length is different, and the middle roll shift hydraulic cylinder model of selection is different, and Lm is also different, B-strip width；50- steel edge portion with
The relative position δ of intermediate calender rolls body of roll end, different Continuous mill trains can also have setting variation) middle roll shift hydraulic cylinder travel
Calculation formula calculates, the traversing hydraulic cylinder travel L:(Lm=837.5mm of intermediate calender rolls play)
Before preceding a roll L=837.5-1250/2-50=162.5mm
Afterwards after a roll L=837.5-1000/2-50=287.5mm
Before pre- 1/2 L=L of roll shifting+(after L before-L)/2=162.5+ (287.5-162.5)/2=225mm
Embodiment 4:
Previous coiled strip steel width 1500mm → latter coiled strip steel width 1219mm (" width narrows " dynamic variable specification):
By L=Lm-B/2-50, (in formula: the traversing hydraulic cylinder of Lm-limits length, and different Continuous mill trains is because of working roll roller
Body length is different, and the middle roll shift hydraulic cylinder model of selection is different, and Lm is also different, B-strip width；50- steel edge portion with
The relative position δ of intermediate calender rolls body of roll end, different Continuous mill trains can also have setting variation) middle roll shift hydraulic cylinder travel
Calculation formula calculates, the traversing hydraulic cylinder travel L:(Lm=837.5mm of intermediate calender rolls play)
Before preceding a roll L=837.5-1500/2-50=37.5mm
Afterwards after a roll L=837.5-1219/2-50=178mm
Before pre- 1/2 L=L of roll shifting+(after L before-L)/2=37.5+ (178-37.5)/2=107.75mm ≈ 108mm
When method of the present invention is for strip width variation dynamic variable specification, implement a kind of band of on-line tuning roller shape
Steel change width dynamic variable specification board-shape control method, achievees the purpose that continuous rolling.The control method contains coil of strip
Width is by " narrow to broaden " dynamic variable specification and by the control method under two kinds of situations of " width narrows " dynamic variable specification, in practical life
In production, other operations or control reason may be limited to, it can also be in the regular period only with the controlling party of one of two kinds of situations
Method.
For different units, the traversing hydraulic cylinder travel L of intermediate calender rolls play, relative position δ, working roll, intermediate calender rolls bending roller force
Parameter will be different, but can implement according to the technical solution.Improve on-line tuning plate shape of the coil of strip in width transition
Ability, be not required to shut down threading the production of width dynamic variable specification can be realized, while reducing abnormal off-line roll indirectly
Quantity improves unit lumber recovery.
The present invention is exemplarily described above in conjunction with attached drawing, it is clear that the present invention implements not by aforesaid way
Limitation, if use the improvement for the various unsubstantialities that conception and technical scheme of the invention carry out, or it is not improved will
Conception and technical scheme of the invention directly apply to other occasions, within the scope of the present invention.
Claims (7)
1. a kind of board-shape control method of Cold tandem mill strip steel width dynamic variable specification, it is characterised in that: the Strip Shape Control side
Method the following steps are included:
In Cold tandem mill strip steel width dynamic variable specification control process, intermediate roll shifting mode is double fragmentation progress；It is intermediate
A roll shifting is respectively executed with regional location after weld seam before weld seam of the roller play respectively between two coiled strip steel of front and back.
2. the board-shape control method of Cold tandem mill strip steel width dynamic variable specification as described in claim 1, it is characterised in that: described
Board-shape control method the following steps are included:
1) the automatic roll shifting mode of intermediate calender rolls is closed；2) middle roll shift hydraulic cylinder total travel L is calculated according to reciprocity roll shifting mode；
3) at weld pitch milling train 30m, 1/2*L play value is executed；4) after weld seam feed mill, then intermediate calender rolls 1/2*L play value is executed；5)
Restore the automatic roll shifting mode of intermediate calender rolls, milling train continuous rolling.
3. the board-shape control method of Cold tandem mill strip steel width dynamic variable specification as claimed in claim 1 or 2, it is characterised in that:
It is described intermediate calender rolls play execution before, adjusting control first is compensated to bending roller force.
4. the board-shape control method of Cold tandem mill strip steel width dynamic variable specification as claimed in claim 2, it is characterised in that: described
In board-shape control method, in width of steel coil by the control of " narrow to broaden " dynamic variable specification are as follows:
A, it is more than the dynamic variable specification of 150mm for strip width jump, the automatic roll shifting mode of intermediate calender rolls is closed in advance, is implemented
Manual roll shifting mode；
B, 25-35mm first carries out the 1/2 traversing hydraulic cylinder of intermediate calender rolls play in advance manually on narrow specification width before weld seam enters milling train
The play stroke of stroke；At this time since steel edge portion and the relative position δ of intermediate calender rolls body of roll end are greater than setting position, strip will
Bilateral wave can be generated, can first pass through in advance and increase the positive bending roller force implementation control of working roll；
C, after weld seam enters milling train, altering for the 1/2 traversing hydraulic cylinder travel of intermediate calender rolls play is executed again manually in wide specification strip steel
Dynamic stroke；At this time since the relative position δ of steel edge portion and intermediate calender rolls body of roll end is less than setting position, during strip will generate
Wave, first pass through reduces the positive bending roller force of working roll in advance is controlled this；
D, after the completion of dynamic variable specification, by intermediate roll shifting pattern recovery to automatic mode.
5. the board-shape control method of Cold tandem mill strip steel width dynamic variable specification as claimed in claim 2, it is characterised in that: described
In board-shape control method, in width of steel coil by the control of " width narrows " dynamic variable specification are as follows:
A, it is more than the dynamic variable specification of 150mm for strip width jump, the automatic roll shifting mode of intermediate calender rolls is closed in advance, is implemented
Manual roll shifting mode；
B, 25-35mm first carries out the 1/2 traversing liquid of intermediate calender rolls play in advance manually in the wide specification strip steel of preceding volume before weld seam enters milling train
The play stroke of cylinder pressure stroke；At this time since steel edge portion and the relative position δ of intermediate calender rolls body of roll end are less than setting position, band
Steel will generate in wave, first pass through in advance reduce the positive bending roller force of working roll this is controlled；
C, after weld seam enters milling train, the 1/2 traversing hydraulic cylinder travel of intermediate calender rolls play is executed again manually in the narrow specification strip steel of rear volume
Play stroke；At this time since steel edge portion and the relative position δ of intermediate calender rolls body of roll end are greater than setting position, strip will be produced
Raw bilateral wave can first pass through in advance and increase the positive bending roller force implementation control of working roll；
D, after the completion of dynamic variable specification, by intermediate roll shifting pattern recovery to automatic mode.
6. the board-shape control method of Cold tandem mill strip steel width dynamic variable specification as described in claim 4 or 5, it is characterised in that:
In the board-shape control method, increases the positive bending roller force of working roll and reduce the range of the positive bending roller force of working roll in setting value
20-30%.
7. the board-shape control method of Cold tandem mill strip steel width dynamic variable specification as described in claim 4 or 5, it is characterised in that:
In the board-shape control method between step c and d are as follows: by between outlet plate profile instrument detection, rack in play implementation process
Plate shape observation in kind carries out manually intervening fine tuning, can quickly inhibit flatness defect.
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| CN112588837A (en) * | 2020-11-27 | 2021-04-02 | 日照宝华新材料有限公司 | System and method for automatically identifying pressing-down of roll box of scale breaking withdrawal and straightening machine |
| CN113305154A (en) * | 2021-04-29 | 2021-08-27 | 首钢京唐钢铁联合有限责任公司 | Roll shifting control method and device, rolling mill set and storage medium |
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| CN116140376A (en) * | 2023-02-15 | 2023-05-23 | 北京科技大学 | Roll shifting setting method for wear compensation roll shape of hot rolling working roll |
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| CN109772889A (en) * | 2019-02-15 | 2019-05-21 | 广东含元工业技术有限公司 | A kind of cold-rolling mill |
| CN110125190B (en) * | 2019-05-24 | 2021-04-23 | 首钢京唐钢铁联合有限责任公司 | Method and device for preventing edge crack of strip steel in rolling |
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| CN111362034A (en) * | 2020-04-09 | 2020-07-03 | 昆明鼎承启鑫科技有限公司 | Sheet material splicing mechanism |
| CN112157139A (en) * | 2020-09-22 | 2021-01-01 | 山东钢铁集团日照有限公司 | Method for automatically adjusting strip steel plate type of planisher by means of plate type instrument parameter setting |
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| CN113305154A (en) * | 2021-04-29 | 2021-08-27 | 首钢京唐钢铁联合有限责任公司 | Roll shifting control method and device, rolling mill set and storage medium |
| CN114769325A (en) * | 2022-04-26 | 2022-07-22 | 马鞍山钢铁股份有限公司 | Control method for roll shifting of hot continuous rolling CVC working roll |
| CN116140376A (en) * | 2023-02-15 | 2023-05-23 | 北京科技大学 | Roll shifting setting method for wear compensation roll shape of hot rolling working roll |
| CN116140376B (en) * | 2023-02-15 | 2024-02-20 | 北京科技大学 | Roll shifting setting method for wear compensation roll shape of hot rolling working roll |
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