CN103801565B - Roll up the thickness control technique of stove milling train hot-strip head-tail - Google Patents
Roll up the thickness control technique of stove milling train hot-strip head-tail Download PDFInfo
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- CN103801565B CN103801565B CN201310617208.3A CN201310617208A CN103801565B CN 103801565 B CN103801565 B CN 103801565B CN 201310617208 A CN201310617208 A CN 201310617208A CN 103801565 B CN103801565 B CN 103801565B
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Abstract
The invention discloses a kind of thickness control technique for avoiding head-tail from suppressing the strip head-tail that area's overvoltage protection roll is not damaged by, comprise the following steps, during belt steel rolling, that end that strip is introduced into milling train is head, that end entered afterwards is afterbody, during calendering area is suppressed in strip head-tail setting one, the length for suppressing area is set as 0~30m, actual roll gap is set as S~S 2.5mm, when strip is in last one of operation of rolling, the strong drafts in head reduces, afterbody is in rolling, as tail length 10~18m of remainder, actual roll gap is progressively adjusted into S+0.5mm~S+1.5mm, S is target roll gap, target roll gap refers to the roll gap set between milling train upper working rolls and lower working rolls according to computations.It is an advantage of the invention that：The head-tail of strip is suppressed down, had so both reduced the overproof raising lumber recovery of thickness end to end of strip, and had avoided roll to sting steel again and cause rolls damage accident.
Description
Technical field
The present invention relates to a kind of thickness control technique of volume stove milling train hot-strip head-tail.
Background technology
Single chassis volume stove milling train is will to be provided simultaneously with batching with the volume stove of heating function installed in the entering of finishing mill, export two
Side, realize the reciprocal rolling of strip.The major function of volume stove is to ensure strip temperature in the operation of rolling, and strip is in reciprocal multiple tracks
Because multiple threading, strip are big with long thermal loss of extraneous time of contact end to end in the secondary operation of rolling.Further, since strip is end to end
Directly contacted with the rolling drum in volume stove and will also result in certain thermal loss, these thermal loss exacerbate in the middle part of strip and head-tail
The temperature difference, cause strip head-tail plasticity variation thickness control difficult.Head-tail can also add in the case where losing tension force simultaneously
The situation of acute afterbody super thick.Thickness exceedes tolerance limit and needs to cut off end to end, influences casting yield.
Gauge automatic control（Automatic gauge Control）It is to be rolled by the way that calibrator or sensor are actual to strip
Go out thickness continuously measure or estimate, and according to the deviation signal of measured value and set-point, by means of control loop and control
Device processed, by changing the method thickness control in the deviation range of permission such as depressing position, mill speed.By rolled piece
The system of gauge automatic control within the specific limits is referred to as automatic gauge control system（Abbreviation AGC）.
AGC control methods main at present include：Pressure AGC (BISRA AGC), Monitor Process（MONITOR AGC）, it is preceding
Present AGC（FF AGC）, acceleration and deceleration AGC（ACC and DEC AGC）, end-compensated AGC end to end（TOP and TAIL Edge
Compensation）.Actual production is to the strip mainly end to end end-compensated AGC that super thick works end to end（TOP and
TAIL Edge Compensation）.
End-compensated AGC end to end（TOP and TAIL Edge Compensation）, it is mainly certain to strip end
Length take taper suppress under control strategy, drafts and pressure length by Secondary computer control system.
The content of the invention
The technical problems to be solved by the invention are：A kind of head-tail temperature inductile for considering volume stove rolling mill strip steel is provided
Poor roll-force easily stings greatly the characteristics of steel, while avoids head-tail from suppressing the strip head-tail that area's overvoltage protection roll is not damaged by
Thickness control technique.
In order to solve the above technical problems, the technical solution adopted by the present invention is：One kind volume stove milling train hot-strip head-tail
Thickness control technique, comprise the following steps, roughing terminate after strip be sent into finishing mill in, strip needs according to technological requirement
It could be completed after the reciprocal calender roll requirement in mm finishing mill unit N roads, in the operation of rolling, strip is introduced into that end of milling train
For head, that end entered afterwards is afterbody, suppresses area in strip head-tail setting one during calendering, the length for suppressing area is set as 0
~30m, actual roll gap is set as S~S-2.5mm, and when strip is in last one of operation of rolling, the strong drafts in head reduces, tail
Actual roll gap, as tail length 10~18m of remainder, is progressively adjusted S+0.5mm~S+1.5mm, S is mesh by portion in rolling
Roll gap is marked, target roll gap refers to the roll gap set between milling train upper working rolls and lower working rolls according to computations.
Roller-way laying stay-warm case between roughing and finish rolling.
Finishing mill calendering working roll uses high-speed steel roll.
Head-tail increases vortex induction heater.
Strip keeps the temperature of strip to maintain 1000~1060 DEG C during whole finish rolling rolls.The present invention's
Beneficial effect is：Section length and strong drafts are suppressed by optimal control, final pass afterbody roll gap is suitably opened, ensures life
Thickness super thick reduces the strip of output end to end, protects roll not damage again.It is effectively slow by rolling up stove heating roller-way Insulation
Head and tail temperature difference is solved, improves 2~3m of the actual reduction of super thick positive effect end to end.By using the high-speed steel roll of high rigidity,
High-speed steel roll non-deformability is obviously improved, and pressure ability is played very well, to improving super thick significant effect end to end.It is actual
Reduce 5~8m of super thick.
Embodiment
Specific embodiments of the present invention are described below in detail.
A kind of thickness control technique of volume stove milling train hot-strip head-tail, comprises the following steps, roughing terminate after band
Steel is sent into finishing mill, and strip needs complete by ability after the reciprocal calender roll requirement in mm finishing mill unit N roads according to technological requirement
Into in the operation of rolling, that end that strip is introduced into milling train is head, and that end entered afterwards is afterbody, in band steel toe during calendering
Area is suppressed in afterbody setting one, and the length for suppressing area is set as 0~30m, and actual roll gap is set as S~S-2.5mm, and strip is last
When in one of operation of rolling, the strong drafts in head suitably reduces, and afterbody is in rolling, will as tail length 10~18m of remainder
Target roll gap progressively adjusts S+0.5mm~S+1.5mm, and S is target roll gap, and target roll gap refers to root between milling train upper working rolls and lower working rolls
The roll gap set according to computations, to avoid roll overvoltage from stinging steel accident.
Reduce the temperature difference of the slab end to end with centre.To ensure that rolling temperature reduces head and tail temperature difference, take in roughing and essence
The method of roller-way laying stay-warm case between rolling, to improve board briquette, it is poor to reduce head and tail temperature.Base temperature carries among after implementation
It is high 20 DEG C, reduce 5 DEG C or so of the temperature difference at head-tail and middle part（1060~1100 DEG C of supplied materials temperature）.
Improve finishing mill roll rigidity.Finishing mill calendering working roll uses high-speed steel roll, the rigidity of high-speed steel roll compared with
The rigidity of Common Infinite chilled cast iron roll is high by 30%, i.e. the ability of high-speed steel roll resistance elastic deformation is substantially better than indefinite chill
Grain roll.Actual effect shows that taking high rigidity roll to roll identical 4 feet of 3.0mm super thick reduces 5~8m, improvement
Clearly.
Thermal loss compensates end to end.Certain mode of heating (sensing heating) is taken to set length compensation head and tail temperature end to end
Loss, ensure the uniformity of material total length temperature.Strip keeps the temperature of strip to maintain during whole finish rolling rolls
1000~1060 DEG C.Reduce the temperature loss that strip contacts with rolling drum, take volume stove heating.Because Steckel Mill needs are more
Secondary threading, strip need to be wrapped in rolling drum end to end, and if the temperature of rolling drum is lower than belt steel temperature, head and tail temperature loss is tight
Weight, this can aggravate the temperature difference of strip head, middle and end, influence thickness control end to end.Rise volume furnace temperature is taken, to improve volume
Drum temperature（Original 980 DEG C of in-furnace temperature, now set 1000~1060 DEG C）, reduce rolling drum and cause the thermal loss of strip end to end,
Alleviate the control pressure of end-compensated AGC end to end, and then the super thick improved end to end improves thickness and precision end to end.
Head-tail increases vortex induction heater, controls head-tail heated length and increasing extent of temperature to alleviate head and tail temperature difference.
Claims (5)
1. the thickness control technique of volume stove milling train hot-strip head-tail, it is characterised in that：Comprise the following steps, after roughing terminates
Strip be sent into finishing mill, strip according to technological requirement need by after the reciprocal calender roll requirement in mm finishing mill unit N roads
It can complete, in the operation of rolling, that end that strip is introduced into milling train is head, and that end entered afterwards is afterbody, in band during calendering
Area is suppressed in steel toe afterbody setting one, and the length for suppressing area is set as 0~30m, and actual roll gap is set as S~S-2.5mm, and strip exists
When in last one of operation of rolling, the strong drafts in head reduces, and afterbody is in rolling, will as tail length 10~18m of remainder
Actual roll gap progressively adjusts S+0.5mm~S+1.5mm, and S is target roll gap, and target roll gap refers to root between milling train upper working rolls and lower working rolls
The roll gap set according to computations.
2. the thickness control technique of volume stove milling train hot-strip head-tail according to claim 1, it is characterised in that:Roughing
Roller-way laying stay-warm case between finish rolling.
3. the thickness control technique of volume stove milling train hot-strip head-tail according to claim 1, it is characterised in that：Finish rolling
Machine calendering working roll uses high-speed steel roll.
4. the thickness control technique of volume stove milling train hot-strip head-tail according to claim 1, it is characterised in that：End to end
Portion increases vortex induction heater.
5. the thickness control technique of volume stove milling train hot-strip head-tail according to claim 1, it is characterised in that：Strip
During whole finish rolling rolls, the temperature of strip is kept to maintain 1000~1060 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310617208.3A CN103801565B (en) | 2013-11-27 | 2013-11-27 | Roll up the thickness control technique of stove milling train hot-strip head-tail |
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| CN201310617208.3A CN103801565B (en) | 2013-11-27 | 2013-11-27 | Roll up the thickness control technique of stove milling train hot-strip head-tail |
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| CN103801565A CN103801565A (en) | 2014-05-21 |
| CN103801565B true CN103801565B (en) | 2018-01-09 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384201B (en) * | 2014-10-13 | 2016-04-27 | 南京钢铁股份有限公司 | A kind of rolling process of avoiding depresses the method for distributing and changing greatly |
| CN105327938B (en) * | 2015-11-11 | 2017-12-15 | 张家港浦项不锈钢有限公司 | A kind of stainless steel production steekle mill is used for the method for producing titanium plate |
| CN107030108A (en) * | 2017-04-21 | 2017-08-11 | 中铝瑞闽股份有限公司 | A kind of rafifinal target heavy reduction rolling method |
| CN107377632B (en) * | 2017-08-11 | 2020-03-27 | 张家港联峰钢铁研究所有限公司 | Temperature control system for reducing head-tail size difference of reinforcing steel bars and operation method |
| CN109663814A (en) * | 2018-11-19 | 2019-04-23 | 包头钢铁（集团）有限责任公司 | A method of reduce think gauge abrasion-resistant stee steel plate end to end with plate body thickness difference |
| CN111957751B (en) * | 2020-07-10 | 2022-04-08 | 北京科技大学设计研究院有限公司 | Method for controlling head and tail thinning wedge in reversible rolling process of steckel mill |
| CN112692058A (en) * | 2021-01-07 | 2021-04-23 | 唐山燕山钢铁有限公司 | Rolling process for controlling thickness stability of non-oriented silicon steel |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745540A (en) * | 2008-12-01 | 2010-06-23 | 朱浩锋 | Process for improving ultra-thick head and tail of hot rolling strip steel of Steckel mill |
| CN102641903A (en) * | 2011-02-16 | 2012-08-22 | 宝山钢铁股份有限公司 | Steckel mill rolled piece head-and-tail deviation control method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100685038B1 (en) * | 2005-10-05 | 2007-02-20 | 주식회사 포스코 | Thickness control apparatus in rolling mill |
| JP4427024B2 (en) * | 2005-12-22 | 2010-03-03 | 株式会社神戸製鋼所 | Strip rolling method |
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- 2013-11-27 CN CN201310617208.3A patent/CN103801565B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101745540A (en) * | 2008-12-01 | 2010-06-23 | 朱浩锋 | Process for improving ultra-thick head and tail of hot rolling strip steel of Steckel mill |
| CN102641903A (en) * | 2011-02-16 | 2012-08-22 | 宝山钢铁股份有限公司 | Steckel mill rolled piece head-and-tail deviation control method |
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| CN103801565A (en) | 2014-05-21 |
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Address after: 215625 Puxiang (Zhangjiagang) Stainless Steel Co., Ltd. on the north side of the Yangtze River Highway, Jinfeng Town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee after: POSCO (ZHANGJIAGANG) STAINLESS STEEL Co.,Ltd. Address before: 215625 Zhangjiagang Puxiang Stainless Steel Co., Ltd., Jinfeng Town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee before: ZHANGJIAGANG POHANG STAINLESS STEEL Co.,Ltd. |
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Effective date of registration: 20190326 Address after: 110122 Puxiang (Liaoning) Automobile Parts Manufacturing Co., Ltd. No. 123, Dadong District Construction Road, Shenyang City, Liaoning Province Patentee after: Puxiang (Liaoning) Automotive Parts Manufacturing Co.,Ltd. Address before: 215625 Puxiang (Zhangjiagang) Stainless Steel Co., Ltd. on the north side of the Yangtze River Highway, Jinfeng Town, Zhangjiagang City, Suzhou City, Jiangsu Province Patentee before: POSCO (ZHANGJIAGANG) STAINLESS STEEL Co.,Ltd. |