CN110102579A - Low-cost control method for eliminating width of slab wedge - Google Patents
Low-cost control method for eliminating width of slab wedge Download PDFInfo
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- CN110102579A CN110102579A CN201910398201.4A CN201910398201A CN110102579A CN 110102579 A CN110102579 A CN 110102579A CN 201910398201 A CN201910398201 A CN 201910398201A CN 110102579 A CN110102579 A CN 110102579A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000005096 rolling process Methods 0.000 claims abstract description 35
- 238000004519 manufacturing process Methods 0.000 claims abstract description 17
- 238000003079 width control Methods 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- 230000006870 function Effects 0.000 claims description 15
- 238000005070 sampling Methods 0.000 claims description 6
- 230000033228 biological regulation Effects 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 4
- 238000004364 calculation method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000009749 continuous casting Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
- B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
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Abstract
The invention relates to a width control method for eliminating a slab wedge at low cost, which comprises the steps of recording the actual head and tail widths of strip steel in the whole length rolling process from the head to the tail of a first rolling pass of rough rolling, and calculating the head and tail width difference; and in the edge rolling process of the third rolling pass from the head to the tail of the full length, dynamically adjusting the width of a rough rolling outlet by dynamically setting the roll gap of the vertical roll according to the head-tail width difference. The invention has the advantages that: the method is suitable for a medium and thin slab production line which has no inlet width gauge and can not realize width feedforward control in rough rolling, and the wedge-shaped slab with the thickness less than 20mm can be eliminated by adopting 3 passes of rough rolling.
Description
Technical field
The invention belongs to the width controls that hot rolled strip roughing technology field more particularly to a kind of low cost eliminate slab wedge shape
Method processed, suitable for there was only the Hot Rolling Mill of a rough rolling vertical roller mill.
Background technique
Single relatively conventional slab hot continuous rolling production of vertical miller production line (hot rolling roughing mill group only has a vertical miller)
Line is with low investment, equipment is few, and a width gage is only arranged in general roughing.It is wide by a vertical miller, a width gage equipment limit
Degree automatic control function only has two-short stroke AWC and roll-force AWC, and it is relatively weak that width controls guarantee ability.
Typical list vertical miller production line and conventional plate blank hot continuous rolling production line width control aspect equipment, width gage table pair
Than as follows:
Since the steel rolling process width control equipment of single vertical miller production line only has E1 (vertical miller), the milling train is maximum
Lateral pressure amount 50mm when not having width gage before the equipment, can not achieve width feedforward control.When there is wedge shape in blank width
Even if (meet national standard YB/T 2012-2004 regulation continuous casting steel billet width wedge shape standard, practical head and tail width difference 0 to 20mm it
Between), steel rolling process width control precision index can decline, and occur local ultra-wide or narrow rule when serious, cause rejected product.
National standard YB/T 2012-2004 provides continuous casting steel billet width wedge shape standard: the width at slab head and the tail 150mm
Poor │ W-W2│≤20mm。
Domestic and international prior art scenario: Hot Strip Width control is because each apparatus for production line equipment is different, control function
It equips and increases and decreases with its equipment.It generally equips hydraulic vertical miller production line and all has AWC function, roughing has short stroke AWC, rolls
Power AWC processed, feedforward AWC, dynamic set 4 AWC functions.Wherein feedforward AWC function can solve blank width wedge shape problem,
The AWC that feedovers in AWC function needs to equip width gage before vertical miller with dynamic set-up function, according to width gage actual measurement plate
Base width data is controlled.If without equipment width gage before vertical miller, and controlling wide equipment, blank width wedge without other
Shape is uncontrollable.
Summary of the invention
In order to overcome the deficiencies of the prior art, the object of the present invention is to provide the width controls that a kind of low cost eliminates slab wedge shape
Under conditions of method processed is not equipped with width gage before vertical miller, and no other control wide equipment, plate is eliminated with minimum cost
Base wedge shape solves the problems, such as that finished strip width caused by width of plate slab wedge shape is bad.
To achieve the above object, the invention is realized by the following technical scheme:
A kind of low cost eliminates the width control method of slab wedge shape, in roughing the first rolling pass from first to last overall length
In the operation of rolling, record paper steel toe tail developed width, and it is poor to calculate head and tail width；In third rolling pass from first to last overall length
It is poor according to head and tail width in the edge operation of rolling, it is set by the dynamic of edger roll roll gap, dynamic adjusts roughing exit width, tool
Body the following steps are included:
1) it is converted with the second passage and third passage width measurement at the end of second-level model that brings into operation connects in the first passage
Data processor is received, second level setup algorithm program brings into operation when roughing the second passage plain-barreled roll stings steel；
1. in order to eliminate the wrong data in the width difference actual feedback that level-one transmitting comes up, to the first passage width
Deviation actual value is smoothed:
In formula (1): ⊿ RDW (i) is the actual value of the first passage width difference saved；
TSN is total sampling number, is determined by width gage actual samples number；
2. currently rolling up the unit width shim values of the first passage:
In formula (2), CTPCR1 is the unit width shim values of the first passage of current volume；
NSN is head unstable region number of sampling points, range 16~45, it is necessary to cover unstable region；
3. unit width wedge shape control parameter directly acts on third passage edger roll roll gap:
TPCR=G1 × CTPCR1+ (1-FTPCR) × LTPCR3 (3)
In formula (3), TPCR is the unit width wedge shape control parameter currently rolled up, and unit mm is applied directly to third passage
Each opening degree scan period of edger roll；
G1 is that unit width wedge shape control parameter currently adjusts gain, range 0.5~1.5；
FTPCR is unit width wedge shape control parameter learning regulation gain, range 0~1；
LTPCR3 is the effective unit width shim values of upper coil third passage, the same formula of calculation method (2), and initial value is
0；The same formula of data processing method (1)；
4. unit width wedge shape control parameter Credibility judgement:
If TPCR < Lmt2 or TPCR > Lmt 1 updates unit width wedge shape control parameter TPCR, otherwise current TPCR
Value is invalid, and unit width wedge shape control parameter TPCR does not update, and still uses the TPCR of upper a roll；
Lmt 1 is the lower limit of unit width wedge shape control parameters error；
Lmt2 is the upper limit of unit width wedge shape control parameters error.
First class control system starts executable unit's width wedge after third rolling pass edger roll head short stroke AWC is executed
Shape control parameter, each scan period edger roll opening adjustment amount are TPCR, are stopped when tail portion short stroke AWC is executed；It executes
When do not put into roll-force AWC function；
Starting second-level model receives data processor when first passage and the second passage are converted, with take into account production efficiency and
Data volume as much as possible.
Compared with prior art, the beneficial effects of the present invention are:
The present invention is suitable for roughing without entrance width gage and can not achieve the medium thin slab production line of width feedforward control, slightly
The wedge shape that slab is less than 20mm can be eliminated using 3 passes by rolling.Due to controlling width of plate slab wedge shape in advance, to a certain degree
On play width feedforward control action, save the investment of width gage table, the function Ji steel 1700ASP production line stablize investment
10 years, the wedge shape that slab is less than 20mm is eliminated, effect is fine always.
Detailed description of the invention
Fig. 1 is the definition figure of unstable region and stability region.
Fig. 2 is control flow chart.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings of the specification, it should be noted that implementation of the invention is unlimited
In the following embodiments and the accompanying drawings.
Low cost eliminates the width control method of slab wedge shape, without entrance width gage and can not achieve width suitable for roughing
Middle slab (thickness 135-170mm) production line of feedforward control is used for 3 passes of roughing, can eliminate slab less than 20mm's
Wedge shape；In the first rolling pass of the roughing from first to last operation of rolling of overall length, record paper steel toe tail developed width, and calculate head
Tail width is poor (wedge shape).Third rolling pass from first to last in the edge operation of rolling of overall length, according to wedge-shaped size, passes through edger roll
The dynamic of roll gap is set, and dynamic adjusts roughing exit width；When roughing setting up calculates normal, carried out when AWC sampled data is normal
Operation, actual result data are provided by primary computer, and roughing mill sets data and is input to this function from other function, specific to flow
Journey is shown in Fig. 2.
Low cost eliminates the width control method of slab wedge shape, specifically includes the following steps:
1) it is converted with the second passage and third passage width measurement at the end of second-level model that brings into operation connects in the first passage
Data processor is received, second level setup algorithm program brings into operation when roughing the second passage plain-barreled roll stings steel.
1. in order to eliminate the wrong data in the width difference actual feedback that level-one transmitting comes up, to the first passage width
Deviation actual value is smoothed:
In formula (1): ⊿ RDW (i) is the actual value of the first passage width difference saved；
TSN is total sampling number, is determined by width gage actual samples number.
2. currently rolling up the unit width shim values of the first passage:
In formula (2), CTPCR1 is the unit width shim values of the first passage of current volume；
NSN be head unstable region number of sampling points (according to rolled piece true form artificial experience determine, range 16~
45, it is necessary to cover unstable region).
3. unit width wedge shape control parameter directly acts on third passage edger roll roll gap:
TPCR=G1 × CTPCR1+ (1-FTPCR) × LTPCR3 (3)
In formula (3), TPCR is the unit width wedge shape control parameter currently rolled up, and unit mm is applied directly to third passage
Each opening degree scan period of edger roll；
G1 is that unit width wedge shape control parameter currently adjusts gain, is given according to developed width control result artificial experience
It is fixed, range 0.5~1.5；
FTPCR is unit width wedge shape control parameter learning regulation gain, according to developed width control result artificial experience
It is given, range 0~1；
LTPCR3 is the effective unit width shim values of upper coil third passage, the same formula of calculation method (2), and initial value is
0, the same formula of data processing method (1).
4. unit width wedge shape control parameter Credibility judgement:
If TPCR < Lmt2 or TPCR > Lmt 1 updates unit width wedge shape control parameter TPCR, otherwise current TPCR
Value is invalid, and unit width wedge shape control parameter TPCR does not update, and still uses the TPCR of upper a roll；
Lmt 1 is the lower limit of unit width wedge shape control parameters error；
Lmt2 is the upper limit of unit width wedge shape control parameters error.
2) first class control system starts executable unit's width after third rolling pass edger roll head short stroke AWC is executed
Wedge-shaped control parameter, each scan period edger roll opening adjustment amount are TPCR, are stopped when tail portion short stroke AWC is executed.It holds
Roll-force AWC function cannot be put into when row control method of the present invention.
Boot Model receives data processor when first passage and the second passage are converted, to take into account production efficiency and to the greatest extent may be used
Data volume more than energy.
The method of the present invention puts into average or so volume 4 of each rolling cycle before the function in Ji steel 1700ASP production line application
Finished product head and tail width wedge shape is greater than 5mm, can be reduced to volume 1 hereinafter, improving strip width guarantee ability after putting into the function.?
It passes through and plays an important role for index when Ji steel 1700ASP production line width index guarantee value Acceptance Test.In Ji steel
1700ASP production line stablizes investment 10 years, eliminates the wedge shape that slab is less than 20mm, and effect is fine always；Roughing uses 3 passages
Rolling plays width feedforward control action due to controlling width of plate slab wedge shape in advance to a certain extent.The present invention is in certain journey
Play the role of replacing hardware with software on degree, the investment of width gage table is saved, for advocating today of low-carbon economy, general
There is great promotional value in the design process of logical hot rolling line.
Claims (2)
1. it is a kind of low cost eliminate slab wedge shape width control method, which is characterized in that the first rolling pass of roughing from the beginning
Into the operation of rolling of tail overall length, record paper steel toe tail developed width, and it is poor to calculate head and tail width；Third rolling pass from the beginning
It is poor according to head and tail width into the edge operation of rolling of tail overall length, it is set by the dynamic of edger roll roll gap, dynamic adjusts roughing and goes out
Mouth width degree, specifically includes the following steps:
1) second-level model that brings into operation at the end of the first passage and the conversion of the second passage and third passage width measurement receives number
According to processing routine, second level setup algorithm program brings into operation when roughing the second passage plain-barreled roll stings steel；
1. in order to eliminate the wrong data in the width difference actual feedback that level-one transmitting comes up, to the first passage width difference
Actual value is smoothed:
In formula (1): ⊿ RDW (i) is the actual value of the first passage width difference saved；
TSN is total sampling number, is determined by width gage actual samples number；
2. currently rolling up the unit width shim values of the first passage:
In formula (2), CTPCR1 is the unit width shim values of the first passage of current volume；
NSN is head unstable region number of sampling points, range 16~45, it is necessary to cover unstable region；
3. unit width wedge shape control parameter directly acts on third passage edger roll roll gap:
TPCR=G1 × CTPCR1+ (1-FTPCR) × LTPCR3 (3)
In formula (3), TPCR is the unit width wedge shape control parameter currently rolled up, and unit mm is applied directly to third passage edger roll
Each opening degree scan period；
G1 is that unit width wedge shape control parameter currently adjusts gain, range 0.5~1.5；
FTPCR is unit width wedge shape control parameter learning regulation gain, range 0~1；
LTPCR3 is the effective unit width shim values of upper coil third passage, the same formula of calculation method (2), initial value 0；Number
According to the same formula of processing method (1)；
4. unit width wedge shape control parameter Credibility judgement:
If TPCR < Lmt2 or TPCR > Lmt 1 update unit width wedge shape control parameter TPCR, otherwise current TPCR value without
Effect, unit width wedge shape control parameter TPCR do not update, and still use the TPCR of upper a roll；
Lmt 1 is the lower limit of unit width wedge shape control parameters error；
Lmt2 is the upper limit of unit width wedge shape control parameters error.
2. the width control method that a kind of low cost according to claim 1 eliminates slab wedge shape, which is characterized in that the
First class control system starts executable unit's width wedge shape control parameter after three rolling pass edger roll head short stroke AWC are executed,
Each scan period edger roll opening adjustment amount is TPCR, is stopped when tail portion short stroke AWC is executed；Rolling is not put into when execution
Power AWC function；
Starting second-level model receives data processor when first passage and the second passage are converted, to take into account production efficiency and to the greatest extent may be used
Data volume more than energy.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111644463A (en) * | 2020-05-20 | 2020-09-11 | 安阳钢铁股份有限公司 | Method for improving wedge shape of hot continuous rolling strip steel |
| CN113020280A (en) * | 2021-03-01 | 2021-06-25 | 北京科技大学设计研究院有限公司 | On-line precision evaluation method for rough rolling large vertical roll of hot rolled strip steel |
| CN113083908A (en) * | 2021-03-31 | 2021-07-09 | 北京首钢股份有限公司 | Method and device for controlling width of hot-rolled width-adjusted blank |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111644463A (en) * | 2020-05-20 | 2020-09-11 | 安阳钢铁股份有限公司 | Method for improving wedge shape of hot continuous rolling strip steel |
| CN113020280A (en) * | 2021-03-01 | 2021-06-25 | 北京科技大学设计研究院有限公司 | On-line precision evaluation method for rough rolling large vertical roll of hot rolled strip steel |
| CN113020280B (en) * | 2021-03-01 | 2022-11-11 | 北京科技大学设计研究院有限公司 | On-line precision evaluation method for rough rolling large vertical roll of hot rolled strip steel |
| CN113083908A (en) * | 2021-03-31 | 2021-07-09 | 北京首钢股份有限公司 | Method and device for controlling width of hot-rolled width-adjusted blank |
| CN113083908B (en) * | 2021-03-31 | 2022-11-22 | 北京首钢股份有限公司 | Method and device for controlling width of hot-rolled width-adjusted blank |
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