CN101658869B - Technique for continuously and flatly rolling welding seams of cold-rolled sheets - Google Patents

Technique for continuously and flatly rolling welding seams of cold-rolled sheets Download PDF

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Publication number
CN101658869B
CN101658869B CN2008100129182A CN200810012918A CN101658869B CN 101658869 B CN101658869 B CN 101658869B CN 2008100129182 A CN2008100129182 A CN 2008100129182A CN 200810012918 A CN200810012918 A CN 200810012918A CN 101658869 B CN101658869 B CN 101658869B
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China
Prior art keywords
weld seam
force
planisher
speed
roll
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CN2008100129182A
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Chinese (zh)
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CN101658869A (en
Inventor
杨军荣
林森木
李新民
赵德华
丛劲松
张哲�
吴玉峰
王越
高毅
唐伟
林彬
孟昭萍
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鞍钢股份有限公司
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Publication of CN101658869A publication Critical patent/CN101658869A/en
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Publication of CN101658869B publication Critical patent/CN101658869B/en

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Abstract

The invention relates to a method for continuously and flatly rolling welding seams of cold-rolled sheets. A computer controls a hydraulic cylinder of a flat roll and front and back tension rolls of a leveler, adjusts rolling force and strip steel running speed, and adopts a control method for firstly slowing down the speed and then reducing the rolling force, and firstly recovering the rolling force and then recovering the speed to realize the continuous and flat rolling of the welding seams of the cold-rolled sheets. The technique does not influence the production of previous and subsequent procedures, and eliminates punch marks of the welding seams on the flat roll, so the punch mark defects of the steel sheets are avoided, the surface quality of the steel sheets is improved, and a value of 2.6 million Yuan can be saved each year. The rolling force is reduced, so power consumption is reduced and energy is saved; and the technique dose not need increasing any equipment and investment, is simple and feasible, and has quick response.

Description

The continuously and flatly rolling welding seams of cold-rolled sheets method
Technical field
The invention belongs to the steel rolling process field, relate in particular to a kind of cold-strip steel control method during rolling weld seam on the continuous formation machine.
Background technology
The planisher of continuous annealing unit is one of capital equipment that improves cold-reduced sheet performance and surface quality, is in continual continuously-running duty at continuous annealing production line.The main effect of planisher is that template, surface roughness and the percentage elongation index of band steel are controlled, and wherein percentage elongation is its topmost control index.Continuously under the production status, the band steel toe afterbody that enters continuous annealing furnace welds together, the weld seam that this employing overlap joint welding manner forms certain super thick phenomenon will occur in welding and after rolling, super thickness portion can stay horizontal dent on smooth roller surface during by planisher, cause surface of steel plate after smooth also to stay and laterally press against seal, form and press against the seal defective.
Cause the main cause of laterally pressing against seal to be because the band steel weld seam of continuous annealing by planisher the time, adopts smooth roller gap to open usually and normally passes through dual mode.Open the method for smooth roller gap, because roll gap is from opening to closure again, longer duration and to have a section strip steel to fail smooth, and not smooth part existence can problem; And operation is complicated, frequently opens and closes roll gap, easily equipment is caused repeated stock, causes member and produces fatigue phenomenon.The method of under normal as-rolled condition, passing through, because the hardness height of the steel matrix part after the annealing of the hardness ratio of commissure, be very easy on roll, stay the weld seam impression, and then after skin pass rolling, be pressed into surface of steel plate, formed in every month and can not hand over other steel plate of SG7 level to press against seal defective weight to reach more than 470 tons, not only influence plate surface quality, and cause great economic loss.
Through retrieval, do not find the relevant report of head it off to domestic and international patent documentation and books and periodicals data.
Summary of the invention
Purpose of the present invention is intended at the problems referred to above, provides a kind of and both needn't open roll gap, also can not produce and press against seal, has the cold-reduced sheet weld seam continuous formation milling method of desirable resultant effect.
The technical solution that the present invention taked is:
A kind of continuously and flatly rolling welding seams of cold-rolled sheets method, be by jockey pulley before and after smooth roller hydraulic cylinder of computer control and the planisher, adjust roll-force and strip speed, take first deceleration, subtract roll-force again, recover earlier roll-force, the control method of resume speed again, realize that the continuous formation of cold-reduced sheet weld seam is rolling.Its technical process is:
At first, utilize the weld joint tracking program of computer installation to calculate the distance of weld seam to planisher; Utilize the sign hole of getting in welded joints after the welding of band steel toe tail again, go out position while welding by the optoelectronic induction welding inspection instrument WPD3 practical measurement that is arranged on the outlet of outlet kink;
Then, calculated value is carried out the compensation of the band steel length variations that tension force causes after, the deviation that makes weld seam calculating location and practical measurement position is less than 5mm;
Before band steel weld seam arrived planisher 1.5~3m, the computer master made jockey pulley before and after the speed control system control, with strip speed with 0.4~0.5m/s 2Acceleration be decelerated to 0.667m/s, and with the speed of 0.667m/s operation 10.25~13.5s; Simultaneously, before weld seam arrives planisher 0.4~0.7m, the smooth roller hydraulic cylinder of computer control changes roll-force by adjustment slope parameter 950~1000KN/s 2Reduce to 1000KN fast, make the weld seam part under the little roll-force state of low speed, pass through planisher;
Weld seam is by behind the planisher 0.2m, with the slope parameter 950~1000KN/s of roll-force according to the adjustment variation 2Fast automaticly return to normal rolling force setup value; After weld seam passes through planisher 5m, with 0.2~0.4m/s 2Acceleration make the band steel return to normal running speed.
Compared with prior art, the invention has the beneficial effects as follows:
Because continuous formation weld seam rolling technique of the present invention adopts the method for the little roll-force of low speed, therefore the production of operation before and after not influencing, can on smooth roller, not stay the weld seam dent yet, thereby prevent that steel plate from reining in the roller phenomenon when crossing weld seam, guarantee the stable operation of unit, that has avoided steel plate presses against the seal defective, has improved the surface quality of steel plate, and the annual value of just can saving of only this item reaches 2,600,000 yuan.Because roll-force reduces, thereby has reduced power consumption, has saved the energy.Compare with the mode of lifting roll gap, reduced labor intensity of operating personnel, saved working time, reduced wearing and tearing, improved the operating rate of smooth unit relatively equipment.And, implement the present invention, needn't increase any equipment and investment, and method is simple, instant effect.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is further described.
For the cold-strip steel normal running speed is 4.5m/s, and draught pressure is a 3500KN continuous formation unit, and what generally adopt at present is overall process computer control skin pass rolling, promptly adjusts roll-force by the smooth roller of computer control; Jockey pulley is adjusted strip speed before and after the control planisher.The present invention takes first deceleration, subtracts roll-force again, recover earlier roll-force, the control method of resume speed again, be exactly according to predefined weld joint tracking and skin pass rolling control program, adjust strip speed and roll-force by computer PLC automatic control program, thereby the continuous formation of realizing the cold-reduced sheet weld seam is rolling.
Cold-strip steel is entering the continuous annealing stokehold, be together with the head joint welding of the afterbody of last block of band steel and a back band steel, and be equipped with weld seam sign hole in the commissure.
Computer calculates the distance of weld seam to planisher according to predefined weld joint tracking program.
Utilize band steel weld seam to indicate the hole again, go out position while welding by the optoelectronic induction welding inspection instrument WPD3 practical measurement that is arranged on the outlet of planisher outlet kink.
Because the front and back tension variation is influential slightly to band steel length, so after need carrying out corresponding compensation to the computer calculated value, the deviation that makes weld seam calculating location and practical measurement position is in 5mm.
During 23m, jockey pulley slowed down before and after the computer master made speed control system control, made strip speed by normal 4.5m/s, with 0.426m/s before band steel weld seam arrives planisher 2Acceleration slow down, behind the 9s speed of service is reduced to 0.667m/s; Move 11s with the speed of 0.667m/s then.
Meanwhile, before weld seam arrives planisher during the 0.5m place, the smooth roller hydraulic cylinder of computer control, with roll-force by 3500KN with 1000KN/s 2The slope parameter, fast roll-force is reduced to 1000KN with the 2.5s time.Band steel weld seam part is passed through planisher under the little roll-force state of low speed.
When weld seam by behind the planisher 0.2m, with roll-force still with 950KN/s 2The slope parameter fast automaticly return to normal rolling force setup value.
After weld seam passes through planisher 5m, with 0.34m/s 2Acceleration speed-raising, behind 11.3s, make the band steel return to normal running speed.

Claims (1)

1. continuously and flatly rolling welding seams of cold-rolled sheets method, it is characterized in that, by jockey pulley before and after smooth roller hydraulic cylinder of computer control and the planisher, adjust roll-force and strip speed, take first deceleration, subtract roll-force again, recover earlier roll-force, the control method of resume speed again, realize that the continuous formation of cold-reduced sheet weld seam is rolling; Its specific embodiment is:
At first, utilize the weld joint tracking program of computer installation to calculate the distance of weld seam to planisher; Utilize the sign hole of getting in welded joints after the welding of band steel toe tail again, go out position while welding by the optoelectronic induction welding inspection instrument WPD3 practical measurement that is arranged on the outlet of outlet kink;
Then, calculated value is carried out the compensation of the band steel length variations that tension force causes after, the deviation that makes weld seam calculating location and practical measurement position is less than 5mm;
Before band steel weld seam arrived planisher 1.5~3m, the computer master made jockey pulley before and after the speed control system control, with strip speed with 0.4~0.5m/s 2Acceleration be decelerated to 0.667m/s; And with the speed of 0.667m/s operation 10.25~13.5s; Simultaneously, before weld seam arrives planisher during 0.4~0.7m, the smooth roller hydraulic cylinder of computer control with roll-force by slope parameter 950~1000KN/s 2Reduce to 1000KN fast, make the weld seam part under the little roll-force state of low speed, pass through planisher;
Weld seam is pressed slope parameter 950~1000KN/s with roll-force again by behind the planisher 0.2m 2Fast automaticly return to normal rolling force setup value; After weld seam passes through planisher 5m, with 0.2~0.4m/s 2Acceleration make the band steel return to normal running speed.
CN2008100129182A 2008-08-25 2008-08-25 Technique for continuously and flatly rolling welding seams of cold-rolled sheets CN101658869B (en)

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CN101658869B true CN101658869B (en) 2011-07-27

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CN102485364B (en) * 2010-12-01 2015-06-17 上海宝信软件股份有限公司 Tension stabilizing control method and device for leveling machine
CN103252346B (en) * 2012-02-17 2015-07-22 宝山钢铁股份有限公司 Plate connecting method for improving flying gauge change rolling stability
CN103316932B (en) * 2013-06-04 2014-12-31 马钢控制技术有限责任公司 Steel band loop length calculating system
CN103341525B (en) * 2013-07-12 2016-09-07 鞍钢股份有限公司 A kind of continuous annealing line that reduces batches the method for operating pressing against print
CN104971950B (en) * 2014-04-10 2017-04-26 鞍钢股份有限公司 Automatic deceleration control method of tandem cold mill
CN106270002B (en) * 2016-08-29 2018-09-18 首钢京唐钢铁联合有限责任公司 A kind of method and device of rolled band steel weld seam
CN107321789A (en) * 2017-06-01 2017-11-07 河钢股份有限公司邯郸分公司 The control method of yield point elongation before and after a kind of elimination cold-strip steel weld seam
CN108188183B (en) * 2017-12-12 2019-08-20 大连华冶联自动化有限公司 A method of for the setting of cold rolling processing line strip speed and strip location control
CN110893418A (en) * 2018-09-13 2020-03-20 上海宝信软件股份有限公司 Control method for passing welding seam of temper mill
CN109351781B (en) * 2018-10-10 2020-12-15 首钢京唐钢铁联合有限责任公司 Strip steel seam edge wave control method and device
CN110142314A (en) * 2019-06-05 2019-08-20 北京首钢冷轧薄板有限公司 A kind of galvanized wire weld seam crosses the control method and device of polishing machine tension fluctuation
CN110227724B (en) * 2019-06-09 2021-04-16 宝钢湛江钢铁有限公司 Parameter control method for six-roller cold rolling temper mill for continuous annealing of welding seam
CN110227723B (en) * 2019-06-09 2021-02-26 宝钢湛江钢铁有限公司 Parameter control method for initial section of continuous annealing six-roller cold rolling temper mill
CN110170535B (en) * 2019-06-11 2020-11-20 首钢京唐钢铁联合有限责任公司 Automatic control method for welding seam passing rolling force of galvanizing skin pass mill

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CN1104571A (en) * 1993-12-30 1995-07-05 首钢总公司 Plasma arc welding and rolling process for functional metal materials
CN1199662A (en) * 1997-03-28 1998-11-25 川崎制铁株式会社 Planisher for steel pipe welding seam and its producing method
JP2001137923A (en) * 1999-11-17 2001-05-22 Nkk Corp Skinpass line and method of manufacturing steel strip
CN1857809A (en) * 2005-05-20 2006-11-08 鞍山钢铁集团公司 Dynamic thickening rolling process of controlling break of cold rolled thin strip steel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1104571A (en) * 1993-12-30 1995-07-05 首钢总公司 Plasma arc welding and rolling process for functional metal materials
CN1199662A (en) * 1997-03-28 1998-11-25 川崎制铁株式会社 Planisher for steel pipe welding seam and its producing method
JP2001137923A (en) * 1999-11-17 2001-05-22 Nkk Corp Skinpass line and method of manufacturing steel strip
CN1857809A (en) * 2005-05-20 2006-11-08 鞍山钢铁集团公司 Dynamic thickening rolling process of controlling break of cold rolled thin strip steel

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