CN104209343A - Control method of compensation speed decrease of hot continuous rolling finish rolling rack - Google Patents

Control method of compensation speed decrease of hot continuous rolling finish rolling rack Download PDF

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Publication number
CN104209343A
CN104209343A CN201410449327.7A CN201410449327A CN104209343A CN 104209343 A CN104209343 A CN 104209343A CN 201410449327 A CN201410449327 A CN 201410449327A CN 104209343 A CN104209343 A CN 104209343A
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rolling
steel
rack
speed
control method
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CN201410449327.7A
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CN104209343B (en
Inventor
张世厚
康炜
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Shanxi Taigang Stainless Steel Co Ltd
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Shanxi Taigang Stainless Steel Co Ltd
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Abstract

The invention relates to a control method of compensation speed decrease of a hot continuous rolling finish rolling rack, belonging to the field of steel rolling. According to the method, before steel is bitten by the finish rolling rack, a speed compensation value is applied to the rack in advance, and the speed compensation value is 2-5% of the rack speed reference value; after the steel is bitten for 100-200ms, the speed compensation value is canceled, and the rack speed reference value is recovered for rolling. After the method is adopted, the speed decrease of the rack which bites the steel can be reduced, a strip steel movable sleeve between racks is normally controlled, the rolled waste steel is reduced, and good benefit is obtained.

Description

The control method of hot-rolling finishing mill frame compensation prompt drop
Technical field
The invention belongs to steel rolling field, be specifically related to the speed automatic control method of hot-continuous-rolling strip steel mm finishing mill unit.
Background technology
The not equal factor of special steel kind material, temperature due to Taiyuan Iron and Steel Co. hot continuous rolling, while bringing mm finishing mill unit band steel threading, draught pressure is large, prompt drop is large, very easily cause kink remarkable action between frame, cause unstable steel scrap, the damage plant equipment of even occurring of finish rolling rolling.For this reason, solve the different prompt drop problems of finishing stand different load and guarantee that rolling is stable, it is one of its key that hot fine rolling frame compensation prompt drop is controlled.
Summary of the invention
The object of the invention is, in order effectively to guarantee kink action between frame, to improve mm finishing mill unit rolling stability.
In order to achieve the above object, the technical problem that the present invention solves is: during hot rolling special steel kind band steel, and the larger frame prompt drop problem of bringing due to rolling load of strip hot rolling difference.
technical scheme of the present invention:
Described special steel kind comprises TQ700, TQ750 high-strength steel;
Before finishing stand is stung steel, add in advance a velocity compensated value to frame, described velocity compensated value is 2% ~ 5% of gantry speed a reference value, stings after steel time 100-200ms, cancels velocity compensated value and recovers the rolling of gantry speed a reference value.
Gantry speed a reference value according to rolling steel grade technique by second computer model specification.
The invention solves the larger prompt drop problem that hot-rolling finishing mill frame brings due to rolling load of strip hot rolling difference, eliminated the impact on kink action control with steel frame prompt drop, the stable control while realizing hot-rolling finishing mill frame band steel threading.
The present invention determines velocity compensated value and delay time by one-level computer, general selection principle: belt steel rolling pressure is larger, and frame prompt drop is larger, and required offset is larger, and delay time is longer.
(2) above-mentioned technology realizes and completing by Siemens's TDC controller, CPU model: CPU550; Control signal passage: CP50M1; Transmission control device is: Siemens S150.
The present invention uses this technical scheme in Taiyuan Iron and Steel Co. hot continuous rolling factory, and effect is as follows:
(1) finishing stand threading is stung steel prompt drop and is significantly reduced, and gantry speed is controlled stable, has guaranteed kink action control between frame.
(2) hot fine rolling unit threading speed, kink are controlled and are improved, and have reduced steel scrap between frame, have guaranteed that finish rolling rolling is stable, and the direct economic benefit of obtaining is annual more than 2,300,000 yuan.
The specific embodiment
The control method of two kinds of specification hot-rolling finishing mill frame compensation prompt drops of high-strength steel TQ750 specification 3mm * 1250mm and TQ700 specification 7mm * 1250mm, each gantry speed offset value is as follows:
3mm?*1250mm
 
7mm?*1250mm

Claims (1)

1. hot-rolling finishing mill frame compensates the control method of prompt drop, before finishing stand is stung steel, add in advance a velocity compensated value to frame, described velocity compensated value is 2% ~ 5% of gantry speed a reference value, sting after steel time 100-200ms, cancel velocity compensated value and revert to the rolling of gantry speed a reference value.
CN201410449327.7A 2014-09-05 2014-09-05 Hot-rolling finishing mill frame compensates the control method of prompt drop Active CN104209343B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410449327.7A CN104209343B (en) 2014-09-05 2014-09-05 Hot-rolling finishing mill frame compensates the control method of prompt drop

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410449327.7A CN104209343B (en) 2014-09-05 2014-09-05 Hot-rolling finishing mill frame compensates the control method of prompt drop

Publications (2)

Publication Number Publication Date
CN104209343A true CN104209343A (en) 2014-12-17
CN104209343B CN104209343B (en) 2016-06-29

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104874613A (en) * 2015-05-27 2015-09-02 武汉科技大学 Method for realizing flow per second balance among hot rolling continuous mill stands through rolling mill speed compensation
CN106424155A (en) * 2016-09-30 2017-02-22 安徽马钢自动化信息技术有限公司 Control method for impact compensation of continuous rolling machine
CN110090867A (en) * 2019-05-14 2019-08-06 北京科技大学设计研究院有限公司 A method of piling of steel between edger roll and plain-barreled roll when plain-barreled roll being prevented to sting steel
CN111922093A (en) * 2020-08-10 2020-11-13 山西太钢不锈钢股份有限公司 Method for controlling scratch of ultra-pure stainless steel at finishing mill inlet
CN112275805A (en) * 2020-11-18 2021-01-29 河钢股份有限公司承德分公司 Control method for lower surface quality of hot-rolled strip steel
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
CN113369315A (en) * 2021-06-01 2021-09-10 阳春新钢铁有限责任公司 Control method for rolling mill impact speed drop compensation based on direct-current transmission device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0386309A (en) * 1989-08-31 1991-04-11 Kobe Steel Ltd Rolling method for strip
CN1803326A (en) * 2006-01-25 2006-07-19 冶金自动化研究设计院 Control system for suppressing impact speed drop and torsional oscillation of rolling mill transmission system
JP2009113101A (en) * 2007-11-09 2009-05-28 Jfe Steel Corp Method and apparatus for learning control of rolling load, and manufacturing method of steel sheet
CN101733290A (en) * 2008-11-18 2010-06-16 鞍钢股份有限公司 Anti-tail out automatic control system of hot continuous rolling thin strip steel
CN103506405A (en) * 2013-09-26 2014-01-15 山西太钢不锈钢股份有限公司 Method for compensating finish rolling gap during mixed stainless steel rolling

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0386309A (en) * 1989-08-31 1991-04-11 Kobe Steel Ltd Rolling method for strip
CN1803326A (en) * 2006-01-25 2006-07-19 冶金自动化研究设计院 Control system for suppressing impact speed drop and torsional oscillation of rolling mill transmission system
JP2009113101A (en) * 2007-11-09 2009-05-28 Jfe Steel Corp Method and apparatus for learning control of rolling load, and manufacturing method of steel sheet
CN101733290A (en) * 2008-11-18 2010-06-16 鞍钢股份有限公司 Anti-tail out automatic control system of hot continuous rolling thin strip steel
CN103506405A (en) * 2013-09-26 2014-01-15 山西太钢不锈钢股份有限公司 Method for compensating finish rolling gap during mixed stainless steel rolling

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104874613A (en) * 2015-05-27 2015-09-02 武汉科技大学 Method for realizing flow per second balance among hot rolling continuous mill stands through rolling mill speed compensation
CN106424155A (en) * 2016-09-30 2017-02-22 安徽马钢自动化信息技术有限公司 Control method for impact compensation of continuous rolling machine
CN110090867A (en) * 2019-05-14 2019-08-06 北京科技大学设计研究院有限公司 A method of piling of steel between edger roll and plain-barreled roll when plain-barreled roll being prevented to sting steel
CN111922093A (en) * 2020-08-10 2020-11-13 山西太钢不锈钢股份有限公司 Method for controlling scratch of ultra-pure stainless steel at finishing mill inlet
CN111922093B (en) * 2020-08-10 2022-03-29 山西太钢不锈钢股份有限公司 Method for controlling scratch of ultra-pure stainless steel at finishing mill inlet
CN112275805A (en) * 2020-11-18 2021-01-29 河钢股份有限公司承德分公司 Control method for lower surface quality of hot-rolled strip steel
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
CN113369315A (en) * 2021-06-01 2021-09-10 阳春新钢铁有限责任公司 Control method for rolling mill impact speed drop compensation based on direct-current transmission device

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