CN110216151A - A kind of elimination short route paper-thin strip flies the control method stuck up - Google Patents
A kind of elimination short route paper-thin strip flies the control method stuck up Download PDFInfo
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- CN110216151A CN110216151A CN201910440731.0A CN201910440731A CN110216151A CN 110216151 A CN110216151 A CN 110216151A CN 201910440731 A CN201910440731 A CN 201910440731A CN 110216151 A CN110216151 A CN 110216151A
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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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- 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
- B21B37/72—Rear end control; Front end control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2201/00—Special rolling modes
- B21B2201/06—Thermomechanical rolling
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Abstract
The invention discloses a kind of elimination short route paper-thin strip control method for flying to stick up, including control operation roll of mill roll-in, the threading speed of strip, water in dust removal timing, micro- bilateral unrestrained rolling, working roll uneven wear, reduction ratio condition and parameter.Compared with prior art; the present invention solves the problems, such as to fly to stick up between back segment rack when the rolling of short route paper-thin strip; the technical problems such as paper-thin strip process is unstable to solve short route rolling, realize high quality, the purpose of high stability large-scale production of short route rolling Ultra-thin hot-strip.
Description
Technical field
The present invention relates to strip production methods, and in particular to and a kind of elimination short route paper-thin strip flies the control method stuck up,
Belong to hot rolled strip manufacturing technology field.
Background technique
The variety development of CSP producing line (thin slab continuous casting and rolling producing line) be limited by after slab is thinned the smelting molten steel that causes and
Continuous casting process, and due to its feature, it is more conducive to thin material production compared to conventional hot rolling, while under the promotion of " cold with the torrid zone ",
The market potential of thin material is huge.
Currently, when production Ultra-thin strip, there are floaing in mill speed height, F6, F7 rack strip steel head, gently then pack rolling
F7 is dug in rollgang into F7 rack or out, it is heavy then directly between F6, F7 or on rollgang piling of steel, but will bring
The defect of product quality, F7 working roll, coiling clamp roller roll marks as caused by pack rolling etc., the Wuhan Iron and Steel Plant condition of production according to statistics, only
2015, float in strip steel head roll it is unstable cause 859.617 tons of steel scrap, production disruption 25 times, stop production 2956 minutes, cause
Continuous casting drops pulling rate 5762 minutes, 547.729 tons cataclasm, middle packet is 387.47 tons useless, melts down 761.5 tons, direct losses 839.04 ten thousand
Therefore member realizes that batch, the stable rolling of Ultra-thin strip are this field one of technological difficulties urgently to be resolved.
By the study found that during milling train setting, because of milling train, being rolled in mm finishing mill unit mill product thickness≤2.0mm
The factors such as elastic flattening, the roll gap spring of roller, the setting roll gap of milling train F4-F7 rack is close to 0mm, in addition slab passes through
After the rolling of each passage, strip steel head is in " tongue " (extending greater than both sides in the middle part of strip width direction), strip steel head " tongue
Head " is partially small because of deformation sector width, and the spring of the elastic flattening and roll gap of roll is smaller, will cause strip steel head roll it is thin, in the backward
Section rack is rolled thin phenomenon and is more obvious, strip steel head be easier to occur spring or on float phenomenon；When strip high speed threading, in rolling mill dedusting
Phenomenon of floaing can be generated under updraft (also referred to as " the stack effect ") effect of the formation such as water and dedusting fan, paper-thin strip flies
Stick up that will lead to strip pack rolling and heap useless.
China Patent Publication No. is CN108435803A, and a kind of entitled control strip flies the production method stuck up in finishing mill
Application for a patent for invention in, disclose: the bottom guide of F5 rack and F6 rack outlet for finishing mill unit, transition plates, with
And loop skirtboard, the difference in height between the bottom guide and the transition plates is controlled between 5mm~15mm, by the transition
Difference in height between plate and the loop skirtboard controls between 5mm~15mm, and the bottom guide is higher than the transition plates, described
Transition plates is higher than the loop skirtboard；For the bottom guide of the F5 rack and F6 rack outlet, the bottom guide is gnawed into trace
Or the height of step is controlled in 5mm hereinafter, and gnawing trace or step is polished to described.By to rack specific structure parameter
Adjustment realizes that control strip flies the purpose stuck up.
Summary of the invention
The invention reside in the shortcomings of the prior art is overcome, a kind of elimination short route paper-thin strip is provided and flies the control stuck up
Method, the technical problems such as paper-thin strip process is unstable to solve short route rolling, realizes that short route rolls Ultra-thin hot rolling
High quality, the purpose of high stability large-scale production of strip.
It should be noted that paper-thin strip of the present invention, is strip of the thickness 0.8 to 1.6mm.
The present invention is implemented as follows:
A kind of elimination short route paper-thin strip flies the control method stuck up, and wears including control operation roll of mill roll-in, strip
Tape speed, water in dust removal timing, it is micro- it is bilateral wave rolling, working roll uneven wear, reduction ratio parameter, specifically:
(1) operation roll of mill roll-in controls:
It is upwarped to prevent strip from going out F6, F7, the configuration upper roller of F6, F7 working roll roller diameter is slightly larger than lower roll, and roll-in configures such as
Under:
1 F6/F7 working roll of table and roll-in configuration
| Rack | Work roll diameter/mm | Roll-in/mm |
| F6 | 565~595 | + 0.02~+0.03 |
| F7 | 590~620 | + 0.01~+0.03 |
Wherein, roll-in adjustment is to adjust along radial direction.
(2) the threading speed control of strip:
The threading speed of finish rolling in hot rolling: i.e. strip steel head enters mm finishing mill unit, until strip steel head go out finish rolling end rack,
It by laminar flow, rollgang, eventually passes through coiling clamp roller and Wrapping Roll and completes the speed bitten entirely, then mm finishing mill unit, defeated
Roller-way is sent, unit is batched and can synchronize whole raising speed, it is ensured that low speed threading accomplishes strip steel head even running, specific control parameter
It is as follows:
Table 2 divides the threading speed under steel strip thickness
| Finished product thickness/mm | Strip steel head threading speed m/s |
| 0.8 h≤1.2 < | 9.4~9.6 |
| 1.2 h≤1.4 < | 10.0~10.2 |
| 1.4 h≤1.6 < | 10.3~10.5 |
(3) water in dust removal timing control:
Mm finishing mill unit back segment rack, flue dust, iron sheet ash are more, therefore, can generally install in F5~F7 rack outlet upper and lower
Each water draining beak, when rolled band steel, boiled water, formation water curtain inhibit flue dust and iron sheet ash, realize cleaning upper and lower water draining beak simultaneously
The purpose of environmental protection production.
Table 3 divides the water in dust removal under steel strip thickness to open timing
| Finished product thickness/mm | F6/m | F7/m |
| 0.8 h≤1.2 < | 40~38 | 44~42 |
| 1.2 h≤1.4 < | 37~35 | 41~39 |
| 1.4 h≤1.6 < | 31~29 | 37~35 |
Wherein, timing is opened, is that rack water draining beak is opened, the time of start-up operation.
(4) micro- bilateral unrestrained roll control:
Micro- bilateral wave control is to be corrected by the target flatness value of F6, F7 from zero toward negative value, before realizing rolling this block steel
The roll shifting of corresponding work increases Crown control ability toward negative value play, and the control method with micro- bilateral wave rolling is shown in Table 4.
Table 4 rolls tonnage and the match parameter of straightness is corrected
Remarks: the tonnage of bracket () remarks is that new clothes working roll corrects F6, F7 flatness value when being rolled down to this tonnage.
(5) working roll uneven wear controls:
Because roll needs to scald roller after the roller that newly changes jobs, working roll is just in stable state after general 200 tons of rolling, can just open at this time
Begin to roll very thin material, when F6, F7 working roll 800~900 ton hours of rolling, is also easy to produce middle wave, flies to stick up.Therefore, 900 are rolled down to
Ton hour continues production≤1.6mm thin material, and the probability for flying to stick up is very big, and every piece of steel capital can be exported in F6, F7 when serious flies to stick up.
Therefore, working roll needs to handle according to following requirement when rolling paper-thin strip.
The new working roll thickness transitions principle of table 5
(6) F6, F7 reduction ratio control:
Mm finishing mill unit, F6-F7 mainly control the plate shape of strip.On the basis of Auto load-shifting, artificial correction F6-F7
Rack rolling load reduces the abrasion of F6-F7, mitigates the degree of working roll uneven wear, gropes through scene tracking, by table 6
Control.
Table 6 is according to the artificial load corrected parameter of rolling thickness
Technological principle of the invention is described as follows below:
Why the present invention controls operation roll of mill roll-in.It is since the angular speed of the same rack working roll is identical
, work roll diameter is bigger, and roll surface speed is bigger, otherwise smaller；Work roll diameter is big, belt steel rolling deformed area with respect to president,
Strip extension is bigger, and composite factor is conducive to control strip and flies to stick up.
Why the present invention controls the threading speed of strip.Being is irregular shape due to strip steel head, and strip leads to plate speed
Degree is higher, is more easy to appear strip and bounces in channel line, flies to stick up.
Why the present invention controls water in dust removal timing.It is since strip before rack by having a meeting, water is stagnant in strip upper surface
It stays the time long, causes strip upper and lower surface inhomogeneous cooling even, underlaying surface temperature is higher, and elongation is bigger when rolling, above and below strip
Surface generation is asymmetric to be bitten, and strip has been approached finished product thickness in F6, F7, therefore easily threading occurs and fly to stick up phenomenon.
Why the present invention controls micro- bilateral wave rolling.It is that the upper and lower working roll of rack is negative to alter due to using micro- bilateral wave,
Be conducive to increase the convexity of strip, i.e. the center thickness in strip width direction becomes apparent greater than thickness of two sides, is more advantageous to winged
The control stuck up.
Why the present invention controls the control of working roll uneven wear.It is since the temperature of strip width direction two sides is lower than
Middle part, after mass rolling, two lateral wearings of roll are greater than middle part abrasion aggravation, when edge abrasion reaches 1.3 that middle part is worn
Times when (wear 200um, edge abrasion 260um or so in middle part), when continuing rolling, two sides performance is extended greater than in the middle part of strip more
For protrusion, it is also easy to produce middle wave, flies to stick up.
Why the present invention controls reduction ratio control.It is since reduction ratio is too small, bending roller force can not be to the variation of roll-force
It compensates, strip is easy to produce uncontrolled bilateral shape wave；Reduction ratio is excessive, and back segment temperature in GANTRY is low compared with leading portion rack, gold
Belong to the more prominent of the scrambling performance extended, be unfavorable for Strip Shape Control, is also easy to happen logical plate and rolls brokenly even steel scrap accident.
Compared with prior art, the present invention solve short route paper-thin strip rolling when fly to stick up between back segment rack ask
Topic, the technical problems such as paper-thin strip process is unstable to solve short route rolling, realizes short route rolling Ultra-thin hot rolling
High quality, the purpose of high stability large-scale production of strip, have the effect that
1. method does not need reforming equipment in implementation process, existing equipment and control can be used；
2. this method is suitable for the rolling of all very thin materials of hot fine rolling unit, using this process eliminates paper-thin strips to roll
Fly the generation for the problem of sticking up when processed between back segment rack；
3. this method is simple and easy to do, easily operated, practical.
4. except leading portion rack deformed steel strip be genetic to back segment rack do not bite piling of steel in addition to, in the paper-thin strip operation of rolling this
The winged problem of sticking up in F6, F7 substantially eliminates, and reduces the occurrence quantity of waster, direct motion, stabilization conducive to production.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail:
Embodiment one: the SPHC-B of production thickness 0.8mm.
1. operation roll of mill roll-in:
2. the threading speed of strip:
| Finished product thickness/mm | Strip steel head threading speed m/s |
| 0.8 | 9.41 |
3. water in dust removal timing:
4. micro- bilateral wave rolling:
5. working roll uneven wear:
6. F6, F7 reduction ratio:
Effect: strip did not occurred and flies the problem of sticking up whole year.
Embodiment two: the SPHC-B of production thickness 1.0mm.
1. operation roll of mill roll-in:
2. the threading speed of strip:
| Finished product thickness/mm | Strip steel head threading speed m/s |
| 1.0 | 9.52 |
3. water in dust removal timing:
4. micro- bilateral wave rolling:
5. working roll uneven wear:
6. F6, F7 reduction ratio:
Effect: strip did not occurred and flies the problem of sticking up whole year.
Embodiment three: the SPHC-B of production thickness 1.2mm.
1. operation roll of mill roll-in:
2. the threading speed of strip:
| Finished product thickness/mm | Strip steel head threading speed m/s |
| 1.2 | 9.6 |
3. water in dust removal timing:
4. micro- bilateral wave rolling:
5. working roll uneven wear:
6. F6, F7 reduction ratio:
Effect: strip did not occurred and flies the problem of sticking up whole year.
Example IV: the Q215B of production thickness 1.3mm.
1. operation roll of mill roll-in:
2. the threading speed of strip:
| Finished product thickness/mm | Strip steel head threading speed m/s |
| 1.3 | 10.1 |
3. water in dust removal timing:
4. micro- bilateral wave rolling:
5. working roll uneven wear:
6. F6, F7 reduction ratio:
Effect: strip did not occurred and flies the problem of sticking up whole year.
Embodiment five: the Q215B of production thickness 1.4mm.
1. operation roll of mill roll-in:
2. the threading speed of strip:
| Finished product thickness/mm | Strip steel head threading speed m/s |
| 1.4 | 10.18 |
3. water in dust removal timing:
4. micro- bilateral wave rolling:
5. working roll uneven wear:
6. F6, F7 reduction ratio:
Effect: strip did not occurred and flies the problem of sticking up whole year.
Embodiment six: the SAE1006 of production thickness 1.5mm.
1. operation roll of mill roll-in:
2. the threading speed of strip:
| Finished product thickness/mm | Strip steel head threading speed m/s |
| 1.5 | 10.41 |
3. water in dust removal timing:
4. micro- bilateral wave rolling:
5. working roll uneven wear:
6. F6, F7 reduction ratio:
Effect: strip did not occurred and flies the problem of sticking up whole year.
Embodiment seven: the SAE1006 of production thickness 1.6mm.
1. operation roll of mill roll-in:
2. the threading speed of strip:
| Finished product thickness/mm | Strip steel head threading speed m/s |
| 1.6 | 10.49 |
3. water in dust removal timing:
4. micro- bilateral wave rolling:
5. working roll uneven wear:
6. F6, F7 reduction ratio:
Effect: strip did not occurred and flies the problem of sticking up whole year.
Although reference be made herein to invention has been described for explanatory embodiment of the invention, and above-described embodiment is only this hair
Bright preferable embodiment, embodiment of the present invention are not limited by the above embodiments, it should be appreciated that those skilled in the art
Member can be designed that a lot of other modification and implementations, these modifications and implementations will fall in principle disclosed in the present application
Within scope and spirit.
Claims (3)
1. a kind of elimination short route paper-thin strip flies the control method stuck up, the threading including control operation roll of mill roll-in, strip
Speed, water in dust removal timing, micro- bilateral unrestrained rolling, working roll uneven wear, reduction ratio condition and parameter, it is characterised in that:
(1) operation roll of mill roll-in controls:
The configuration upper roller of F6, F7 working roll roller diameter is slightly larger than lower roll, and wherein the work roll diameter of rack F6 is 565~595mm, roller
+ 0.02~+0.03mm is pressed, the work roll diameter of rack F7 is 590~620mm, roll-in+0.01~+0.03mm；
(2) the threading speed control of strip:
According to the difference of finished strip thickness h, different strip threading speed is set；
As 0.8mm < h≤1.2mm, 9.4~9.6m/s of strip steel head threading speed；
As 1.2mm < h≤1.4mm, 10.0~10.2m/s of strip steel head threading speed；
As 1.4mm < h≤1.6mm, 10.3~10.5m/s of strip steel head threading speed；
(3) water in dust removal timing control:
According to the difference of finished strip thickness h, different water in dust removal is set and opens timing；
As 0.8mm < h≤1.2mm, water in dust removal is opened when strip on rack F6 passes through 40~38m, the strip on rack F7
It is opened when across 44~42m；
As 1.2mm < h≤1.4mm, water in dust removal is opened when strip on rack F6 passes through 37~35m, the strip on rack F7
It is opened when across 41~39m；
As 1.4mm < h≤1.6mm, water in dust removal is opened when strip on rack F6 passes through 31~29m, the strip on rack F7
It is opened when across 37~35m；
(4) micro- bilateral unrestrained roll control:
According to the difference of finished strip thickness h, different F6, F7 straightness correction values is set；
As 0.8mm < h≤1.2mm, 300 ton hours are being rolled down to, F6, F7 straightness correction value are -1,500 ton hours are rolled down to,
F6, F7 straightness correction value are -2；
As 1.2mm < h≤1.4mm, 400 ton hours are being rolled down to, F6, F7 straightness correction value are -1,600 ton hours are rolled down to,
F6, F7 straightness correction value are -2；
As 1.4mm < h≤1.6mm, 400 ton hours are being rolled down to, F6, F7 straightness correction value are -1,600 ton hours are rolled down to,
F6, F7 straightness correction value are -2；
(5) working roll uneven wear controls:
According to the difference of finished strip thickness h, the production time section of different working rolls is set；
As 0.8mm < h≤1.2mm, new working roll starts to produce strip after being rolled down to 350 tons, more renews after being rolled down to 850 tons
Working roll；
As 1.2mm < h≤1.4mm, new working roll starts to produce strip after being rolled down to 300 tons, more renews after being rolled down to 900 tons
Working roll；
As 1.4mm < h≤1.6mm, new working roll starts to produce strip after being rolled down to 200 tons, replaces after being rolled down to 1200 tons
New working roll；
(6) F6, F7 reduction ratio control:
According to the difference of finished strip thickness h, artificial correction F6-F7 rack rolling load reduces the abrasion of F6-F7；
As 0.8mm < h≤1.2mm, F6 load correction value -9~-7%, F7 load correction value -13~-11%；
As 1.2mm < h≤1.4mm, F6 load correction value -7~-5%, F7 load correction value -11~-9%；
As 1.4mm < h≤1.6mm, F6 load correction value -5~-3%, F7 load correction value -9~-7%.
2. eliminating short route paper-thin strip according to claim 1 flies the control method stuck up, it is characterised in that:
The paper-thin strip is with a thickness of 0.8~1.6mm.
3. eliminating short route paper-thin strip according to claim 1 flies the control method stuck up, it is characterised in that:
The threading speed is that strip steel head enters mm finishing mill unit, until strip steel head goes out finish rolling end rack, passes through laminar flow, is defeated
It send roller-way, eventually pass through coiling clamp roller and Wrapping Roll completes the speed that bites entirely.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910440731.0A CN110216151B (en) | 2019-05-24 | 2019-05-24 | Control method for eliminating flying and warping of short-process ultrathin strip steel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910440731.0A CN110216151B (en) | 2019-05-24 | 2019-05-24 | Control method for eliminating flying and warping of short-process ultrathin strip steel |
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| CN110216151A true CN110216151A (en) | 2019-09-10 |
| CN110216151B CN110216151B (en) | 2020-05-05 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111451272A (en) * | 2020-03-31 | 2020-07-28 | 鞍钢股份有限公司 | Finish rolling control method for thin container steel plate |
| CN113522967A (en) * | 2021-06-25 | 2021-10-22 | 武汉钢铁有限公司 | Control method for rolling 550 MPa-level wide-width thin-specification high-strength steel plate in short process |
| CN114345933A (en) * | 2021-12-13 | 2022-04-15 | 首钢京唐钢铁联合有限责任公司 | Rolling method, device, medium and equipment for ultrathin strip steel |
| CN114433639A (en) * | 2022-03-14 | 2022-05-06 | 武汉钢铁有限公司 | Production method capable of reducing flying and warping of ultrathin strip steel on CSP production line |
-
2019
- 2019-05-24 CN CN201910440731.0A patent/CN110216151B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111451272A (en) * | 2020-03-31 | 2020-07-28 | 鞍钢股份有限公司 | Finish rolling control method for thin container steel plate |
| CN113522967A (en) * | 2021-06-25 | 2021-10-22 | 武汉钢铁有限公司 | Control method for rolling 550 MPa-level wide-width thin-specification high-strength steel plate in short process |
| CN114345933A (en) * | 2021-12-13 | 2022-04-15 | 首钢京唐钢铁联合有限责任公司 | Rolling method, device, medium and equipment for ultrathin strip steel |
| CN114345933B (en) * | 2021-12-13 | 2024-05-10 | 首钢京唐钢铁联合有限责任公司 | Rolling method, device, medium and equipment for ultrathin strip steel |
| CN114433639A (en) * | 2022-03-14 | 2022-05-06 | 武汉钢铁有限公司 | Production method capable of reducing flying and warping of ultrathin strip steel on CSP production line |
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