EP0998991A2 - Procédé d'exploitation pour une cage de laminoir d'un train de laminage - Google Patents

Procédé d'exploitation pour une cage de laminoir d'un train de laminage Download PDF

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Publication number
EP0998991A2
EP0998991A2 EP99121520A EP99121520A EP0998991A2 EP 0998991 A2 EP0998991 A2 EP 0998991A2 EP 99121520 A EP99121520 A EP 99121520A EP 99121520 A EP99121520 A EP 99121520A EP 0998991 A2 EP0998991 A2 EP 0998991A2
Authority
EP
European Patent Office
Prior art keywords
rollers
operating method
rolling
cooling medium
contact area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP99121520A
Other languages
German (de)
English (en)
Other versions
EP0998991A3 (fr
Inventor
Jürgen Seidel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SMS Siemag AG
Original Assignee
SMS Schloemann Siemag AG
SMS Demag AG
Schloemann Siemag AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SMS Schloemann Siemag AG, SMS Demag AG, Schloemann Siemag AG filed Critical SMS Schloemann Siemag AG
Publication of EP0998991A2 publication Critical patent/EP0998991A2/fr
Publication of EP0998991A3 publication Critical patent/EP0998991A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B21B37/30—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control
    • B21B37/32—Control of flatness or profile during rolling of strip, sheets or plates using roll camber control by cooling, heating or lubricating the rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/06—Lubricating, cooling or heating rolls
    • B21B27/10—Lubricating, cooling or heating rolls externally
    • B21B2027/103—Lubricating, cooling or heating rolls externally cooling externally

Definitions

  • the present invention relates to an operating method for a roll stand Rolling mill, whereby in the roll stand by means of upper and lower rolls with roll edges first a first metal band with a first metal band width and after a break in rolling, a second metal strip with a second metal strip width are rolled, the rollers being rolled with a while the metal strips are being rolled Coolant to be applied.
  • Such an operating method is known, for example, from EP 0 776 710 A1.
  • the known operating method is the strip edge contact areas of the work rolls controlled cooled so that by means of the crowning change caused by the cooling the essentially by the material cross flow behavior and the Work roll flattening caused counteracts edge drops.
  • the object of the present invention is the known operating method to improve in that a defined crown of the rollers is maintained and the associated belt contour and flatness are improved becomes.
  • the object is achieved in that the rollers at least in one contact area, who contacts the second metal strip during the rolling, while of the cooling medium for a period within the rolling break become.
  • rollers are outside the contact area even during the period acted upon the cooling medium, there is a particularly high crown of the rollers.
  • the cooling medium If the cooling medium is applied to the roller edges during the application of the rollers has indicative speed component, the cooling medium do not get into the contact area.
  • the contact area that is not during the rolling break period with the cooling medium can be smaller than the second metal bandwidth his.
  • the crown in the band edge area is particularly large.
  • the contact area is usually a maximum of 200 mm smaller than the second Bandwidth. So there are up to 100 mm of the rollers on the left and right later contact the second metal band, cooled down.
  • the rolls have roll temperatures that change during rolling.
  • the second metal band is of different weight depending on the temperature and material deformable. For better adjustability of crowning therefore preferably hangs the period of time from the second metal strip and at least one detected roll temperature from.
  • rolls at least work and backup rolls, if necessary also intermediate rolls, include and the work rolls with the cooling medium or not efficiency is particularly high.
  • roller wear occurs due to the disconnected cooling medium is avoided or reduced if the rollers during the break Rotate at a speed that is significantly lower than their operating speed In addition, the least energy is required in this state
  • adjustable rollers are assigned to the rollers with a set pressure and the wipers are turned off the rollers during the break from rolling or the starting pressure is reduced, the wear is particularly low Rollers and the scraper.
  • a continuous casting plant 1 shown only schematically, is one Subsequent rolling mill with several rolling stands. Of the mill stands are only a front roll stand 2 and a rear roll stand 3 are shown.
  • the continuous caster 1 is a so-called thin slab caster. she can optionally be single or multi-stranded. With it metal strips 4 produced, which have a metal strip thickness d between 40 and 150 mm. The Metal strip thickness d is essentially the same for all metal strips 4. The metal bands 4 also have metal bandwidths b. The metal bandwidths b can be between 400 and 2000 mm fluctuate. Shown in Figure 1 are three metal strips 4, which all have a metal strip thickness d between 50 and 80 mm, e.g. of 50 mm. The metal strip widths b are, for example, 1000, 1200 and 1000 mm.
  • the metal strips 4 are successively in the roll stands 2, 3 of the rolling mill rolled. There are breaks between the rolling of the individual metal strips 4 P.
  • the roll stands 2, 3 each have an upper and a lower work roll 5 and an upper and a lower support roller 6 each.
  • the rear roll stand 3 can e.g. furthermore each have an upper and a lower intermediate roller 7. All rollers 5 to 7 heat up during rolling and change their crowning as a result.
  • the cooling medium is over a pump 11 is conveyed from a tank 12 into a spray bar 13.
  • the Spray bar 13 is the cooling medium 10 via a plurality of spray nozzles 14th sprayed onto the work roll 5 shown in FIG.
  • the spray nozzles 14 are individual or can be switched on and off in groups. They are oriented in such a way that Cooling medium 10 during the application of the work roll 5 to the roll edges 8, 9 pointing speed component.
  • each of the spray bars 13 has a plurality of spray nozzles 14 on. For the sake of clarity, however, only one of them is shown in FIG Spray nozzles 14 shown.
  • the movable spray nozzles 14 are only during the break P during of the period T activated. They are also oriented in such a way that the cooling medium 10 flows to the side.
  • the entire Work roll 5 acted upon by the cooling medium 10.
  • the procedure is different.
  • the contact area 15 is an area that contacted during the rolling of the subsequent metal strip 4. He must but does not necessarily cover the entire metal bandwidth b of the following Metal strip 4 extend. It can be smaller.
  • the Contact area 15 has a contact area width k that is smaller than the metal bandwidth b of the subsequent metal strip 4. Outside the contact area 15 however, the work rolls 5 are also during the period 1 with the Cooling medium 10 is applied.
  • the work rolls 5 run at a speed n, which is considerably lower than the operating speed n max of the work rolls 5.
  • the speed n is, for example, below 5% or below 10% of the nominal speed n max .
  • Both the period T and the speed n can of course be used for each Roll stand 2, 3 can be determined individually.
  • Your roll temperature influenced when the rolling of the first metal strip 4 is ended hence the extent to which the work rolls 5 are cooled or not cooled must, and thus also the length of the period T.
  • the roller temperatures - especially the work rolls 5 - are therefore detected and one - not shown - Crowning calculator supplied to determine the period T.
  • the period T can u. U. - z. B. due to wear or temperature differences - Be different sizes for the upper and lower work roll 5.
  • the contact area width k can be varied during the period T.
  • the effective crowning also depends on the rolling force with which the second Metal strip 4 is rolled.
  • the rolling force in turn is a function of the thickness reduction, the temperature and the material (steel type) of the second metal strip 4. This also affects the length of the period T.
  • the effect of the set crown on the metal strip 4 is determined by of a strip contour and flatness model is monitored. This avoids that negative band properties such. B. too tight band edges or band beads to adjust.
  • strippers 16 are assigned to the work rolls.
  • the wipers 16 can be adjusted to the work rolls 5 with a set pressure. To minimize the Wear of the work rolls 5 become the wipers during the breaks P 16 turned off from the work rolls 5. This is symbolic in Figure 1 by the arrows 17 indicated.
  • the starting pressure can also be reduced.
  • the wiper 16 / work roll 5 area by means of separate nozzles during the breaks P a small amount of the cooling medium 10 is applied. With regard to the cooling of the work rolls 5, this amount is negligible, however, it causes lubrication and thus prevents excessive wear the work roll 5 and the scraper 16.
  • the thermal crown of the work rolls 5 can be increased even further, if, in addition to not cooling during the period T, the amount of applied Cooling medium 10 is minimized during rolling.
  • the specified one Roll temperature set.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Control Of Metal Rolling (AREA)
EP99121520A 1998-11-04 1999-10-29 Procédé d'exploitation pour une cage de laminoir d'un train de laminage Withdrawn EP0998991A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19850738A DE19850738A1 (de) 1998-11-04 1998-11-04 Betriebsverfahren für ein Walzgerüst einer Walzstraße
DE19850738 1998-11-04

Publications (2)

Publication Number Publication Date
EP0998991A2 true EP0998991A2 (fr) 2000-05-10
EP0998991A3 EP0998991A3 (fr) 2001-01-03

Family

ID=7886602

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99121520A Withdrawn EP0998991A3 (fr) 1998-11-04 1999-10-29 Procédé d'exploitation pour une cage de laminoir d'un train de laminage

Country Status (4)

Country Link
US (1) US6164110A (fr)
EP (1) EP0998991A3 (fr)
JP (1) JP2000140922A (fr)
DE (1) DE19850738A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103962389A (zh) * 2013-01-28 2014-08-06 宝山钢铁股份有限公司 一种利用冷却水喷嘴梯度布置来控制辊型热凸度的方法
EP3002068A1 (fr) * 2014-10-01 2016-04-06 Primetals Technologies Germany GmbH Voie de laminage dotée d'une pré-commande fondée sur la modélisation pour des pauses de refroidissement

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2006308405B2 (en) * 2005-10-28 2011-05-26 Novelis Inc. Homogenization and heat-treatment of cast metals
KR100711400B1 (ko) 2005-12-23 2007-04-30 주식회사 포스코 압연롤 냉각장치
DE102008049537A1 (de) * 2008-09-30 2010-04-01 Sms Siemag Aktiengesellschaft Verfahren und Vorrichtung zum Kühlen eines Vorbandes oder Bandes eines Metallstrangs in einem Warmwalzwerk
DE102015210680A1 (de) * 2015-06-11 2016-12-15 Sms Group Gmbh Verfahren und Vorrichtung zum Regeln eines Parameters eines Walzgutes

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5581010A (en) * 1978-12-12 1980-06-18 Kobe Steel Ltd Plate shape control method of plate rolling
DE4130672A1 (de) * 1991-09-14 1993-03-18 Escher Wyss Gmbh Verfahren zur durchmesserprofilbeeinflussung von walzen
JPH05237520A (ja) * 1992-02-28 1993-09-17 Nkk Corp 圧延ロールの予熱装置
EP0776710A1 (fr) * 1995-11-20 1997-06-04 Sms Schloemann-Siemag Aktiengesellschaft Dispositif pour influencer le profil d'une bande laminee

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4706480A (en) * 1985-10-11 1987-11-17 Svatos Joseph D Rolling mill cooling system
US4843673A (en) * 1987-06-22 1989-07-04 T. Sendzimir, Inc. Strip wiping system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5581010A (en) * 1978-12-12 1980-06-18 Kobe Steel Ltd Plate shape control method of plate rolling
DE4130672A1 (de) * 1991-09-14 1993-03-18 Escher Wyss Gmbh Verfahren zur durchmesserprofilbeeinflussung von walzen
JPH05237520A (ja) * 1992-02-28 1993-09-17 Nkk Corp 圧延ロールの予熱装置
EP0776710A1 (fr) * 1995-11-20 1997-06-04 Sms Schloemann-Siemag Aktiengesellschaft Dispositif pour influencer le profil d'une bande laminee

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 004, no. 123 (M-029), 30. August 1980 (1980-08-30) -& JP 55 081010 A (KOBE STEEL LTD), 18. Juni 1980 (1980-06-18) *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 690 (M-1530), 16. Dezember 1993 (1993-12-16) -& JP 05 237520 A (NKK CORP), 17. September 1993 (1993-09-17) *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103962389A (zh) * 2013-01-28 2014-08-06 宝山钢铁股份有限公司 一种利用冷却水喷嘴梯度布置来控制辊型热凸度的方法
CN103962389B (zh) * 2013-01-28 2016-04-27 宝山钢铁股份有限公司 一种利用冷却水喷嘴梯度布置来控制辊型热凸度的方法
EP3002068A1 (fr) * 2014-10-01 2016-04-06 Primetals Technologies Germany GmbH Voie de laminage dotée d'une pré-commande fondée sur la modélisation pour des pauses de refroidissement

Also Published As

Publication number Publication date
JP2000140922A (ja) 2000-05-23
EP0998991A3 (fr) 2001-01-03
DE19850738A1 (de) 2000-05-11
US6164110A (en) 2000-12-26

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