EP2906369B1 - Breitenbeeinflussung eines bandförmigen walzguts - Google Patents

Breitenbeeinflussung eines bandförmigen walzguts Download PDF

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Publication number
EP2906369B1
EP2906369B1 EP13765985.0A EP13765985A EP2906369B1 EP 2906369 B1 EP2906369 B1 EP 2906369B1 EP 13765985 A EP13765985 A EP 13765985A EP 2906369 B1 EP2906369 B1 EP 2906369B1
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EP
European Patent Office
Prior art keywords
width
unit
rolled material
crown
tension
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.)
Active
Application number
EP13765985.0A
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German (de)
English (en)
French (fr)
Other versions
EP2906369A1 (de
Inventor
Ansgar GRÜSS
Andreas Jungbauer
Robert Linsbod
Rainer Burger
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.)
Primetals Technologies Germany GmbH
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Primetals Technologies Germany GmbH
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.)
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Publication date
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Publication of EP2906369A1 publication Critical patent/EP2906369A1/de
Application granted granted Critical
Publication of EP2906369B1 publication Critical patent/EP2906369B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B13/00—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories
    • B21B13/22—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories for rolling metal immediately subsequent to continuous casting, i.e. in-line rolling of steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B31/00—Rolling stand structures; Mounting, adjusting, or interchanging rolls, roll mountings, or stand frames
    • B21B31/16—Adjusting or positioning rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/1206—Accessories for subsequent treating or working cast stock in situ for plastic shaping of strands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2267/00—Roll parameters
    • B21B2267/18—Roll crown; roll profile
    • 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
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • 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

Definitions

  • the present invention relates to a method for influencing the width of a strip-shaped rolling stock, in particular before hot rolling, during hot rolling or after hot rolling of the rolled stock in a hot rolling mill.
  • a metallic rolling stock for example a strip-shaped rolling stock made of steel or aluminum, is plastically deformed warm in a rolling nip of a roll stand.
  • a rolling stock with a different width with a cast-rolling composite plant.
  • the width of the slab strand is changed in the mold, whereby a tapered or wider slab piece (also called transition piece or wedge-shaped transition piece) with a certain length (depending on the casting speed and the travel speed of the narrow side wall) is produced.
  • the slab with the transition piece is then rolled in the rolling mill of the composite plant, which in any case a slowly tapered or slowly wider rolled strip is produced.
  • the band can not be sold directly with the rolled transition piece. Consequently It is desired to keep the length of the transition piece as short as possible. This can be done either by cutting out the transition piece from the slab or from the rolled strip, which in any case considerable Verlbringtlere arise. Furthermore, the transition piece can be trimmed or trimmed, whereby the Ausbringtlere can be reduced slightly. A very fast adjustment of the narrow side walls in the mold is also eliminated, since this can easily lead to breakthroughs in the thin strand shell of the slab strand.
  • the object of the invention is to overcome the disadvantages of the prior art and to provide a method for influencing the width of a strip-shaped rolling stock, with which the length of a rolled transition piece, which is outside the width tolerances, can be reduced. This should reduce the Ausbringpolee.
  • the crowning of a working or support roller of the rolling stand can be adjusted depending on the width error e additionally or alternatively to influence the train of the rolling stock, wherein at e> 0 increases the crown of the roller and e ⁇ 0 the crown of the roller is reduced.
  • the central crown (engl. Central crown) is to be understood here as the thickness of the rolled material is reduced in a central area with an increase of the crown, so that the widening of the rolled material is increased during rolling.
  • the central crown is reduced, so that the spread during rolling is reduced.
  • the adjustment of the crown of a roll can be done eg via roll bending actuators or via a thermal influence (eg a zone-dependent cooling) of the roll. If, in the case of thermal influence, an increase in crowning is desired, the cooling of the edge regions of the roll is increased more than the central regions. As a result, the central area of the roller expands more than the edge areas, whereby the crown is increased. On the other side is the crown reduced when the cooling in the central region of the roller is increased more than in the edge regions.
  • both units have a roll stand, and a change in the crown of a roll takes place mainly in the first unit. This ensures that the rolled product after rolling in the second unit has a desired geometry.
  • the adjustment of the crown as a function of the width of the error e can be carried out either controlled or regulated, ie taking into account the measured width B of the rolled material, for example, at the exit from the second unit or later at an additional location.
  • the crown when setting the crown, it is very advantageous to take into account the transport time of the rolling stock from the first unit or from a measuring device for detecting the actual width B actual to the rolling stand. As a result, the width in the transition piece in the rolling stand of the second unit is compensated in the correct time.
  • the consideration of the transport time can also be used when setting the train for width control.
  • the desired width B Soll is a jump function H (t) from B 1 to B 2 or from B 2 to B 1 .
  • the desired width B Soll may also be a ramp function R (t) from B 1 to B 2 or from B 2 to B 1 .
  • other functions are possible.
  • the first aggregate is a mold of a casting machine, e.g. a continuous arc casting machine or a two-roll casting machine, or a rolling stand, e.g. a rolling stand of a roughing mill.
  • a casting machine e.g. a continuous arc casting machine or a two-roll casting machine
  • a rolling stand e.g. a rolling stand of a roughing mill.
  • the rolling stock is expedient to transport the rolling stock from the first unit on a roller table to the second unit.
  • the invention is by no means limited thereto, but operates e.g. also for freely suspended loops between two aggregates.
  • the Fig. 1 shows a part of a cast-rolling composite plant with a sheet continuous casting machine 1 for the continuous casting of molten steel into thin slabs and a subsequent, in-line, rolling mill. From the rolling mill, only a rolling stand 7 of the roughing mill was shown; on the presentation of the other parts of the system has been omitted.
  • the casting speed 11 is 5 m / min; the metallurgical length of the continuous casting machine 1 from the mold 8 to the two driving rollers 10 is 15 m.
  • the strand guide 9 is indicated by two strand guide rollers.
  • the solidified thin slab strand exits via the drive rollers 10 from the continuous casting machine 1 and represents the rolling stock 5.
  • the pair of drive rollers 10 forms the first unit 2.
  • the rolling stock 5 is in the transport direction 6 from the first unit 2 uncut on the roller table 3 to the second unit 4 out, wherein the second unit 4 by a rolling stand. 7 the roughing line is formed.
  • Rolled product 5 rolled in the rolling stand is also referred to as rolled product 12.
  • the width B mold of the thin slab strand at the exit from the mold 8 or at the exit of the rolling stock 5 from the first unit 2 B drive roller are in Fig. 2 shown in solid lines. Due to the length of the continuous casting machine, the head of the transition piece emerges from the first unit 2 with a delay of 3 minutes from the mold 8.
  • the jump function is known from http://mathworld.wolfram.com/HeavisideStepFunction.html.
  • the rolling stock 5 is constricted by the train, whereby the width of the rolling stock 5 and the rolled product 12 is reduced.
  • the width error e is in Fig. 3 shown. On the representation of the width error e for the in Fig. 2 dash-dotted widths was waived.
  • a control scheme for implementing the method according to the invention is in Fig. 4a shown.
  • the width error e is determined by the difference between the target value for the width B desired and the width B, wherein B is determined by the width of the thin slab strand at the exit of the mold 8, taking into account a dead time of 3 min by the dead time member 13.
  • the width error is then amplified by an amplifier member 14 and held by the limiting member 15 within allowable minimum and maximum limits.
  • the result ⁇ Soll is fed to a tension regulator R ⁇ for the rolling stand 7, which adjusts the tension ⁇ to the rolling stock 5 accordingly.
  • the manipulated variable u is switched to the controlled system G, wherein the controlled system G as output an actual width B actual of the rolled product 12 at the exit from the second unit 4 supplies.
  • the main difference between the control scheme in Fig. 4a and the control scheme in 4b is that the actual width B actual of the rolled product 12 is measured immediately after exiting the second unit 4 by the width measuring device 16 (see Fig. 1 ) and the control loop is returned, so that the accuracy of the width control can be significantly increased.
  • the actual width B actual of the rolled product 12 is held closer to the desired width B desired by the inventive method, so that the width tolerances can be better met.
  • the control scheme after Fig. 7 used.
  • the difference to the scheme 4b consists in that the width error e is additionally fed to a controller R Balligk for influencing the crowning of a working and / or support roller of the roll stand 7, which influences the crowning of the roll via the manipulated variable u 2 .
  • the controlled system G by two manipulated variables u 1 , u 2 influenced, wherein the controlled variable is the width B is the rolling stock 5 after the second unit 4 (specifically, the roll stand 7).
  • the manipulated variable u 1 corresponding to the manipulated variable u from the 4b ,
  • the actual width B is measured by the width measuring device 16 at the output of the second unit 4 and the control loop are fed.
  • the Fig. 8 shows like that Fig. 1 a part of a cast-rolling composite plant with a continuous casting machine 1, a first unit 2 in the form of a pair of drive rollers 10, a second unit 4 in the form of a rolling stand 7 and in addition a third unit 17 in the form of another rolling stand 7.
  • the first unit 2 could of course also include several drive rollers 10.
  • the second unit 4 together with the third unit 17 forms the rough rolling of the cast-rolling composite system.
  • the rolling stock 5 is discharged from the drive rollers 10 from the continuous casting machine 1 with a thickness of 90mm, then rolled in the second unit 4 to a thickness of 50mm, and finally reduced in the third unit 17 to a thickness of 30mm.
  • the width of the strand after the mold 8 B mold , the width of the strand in the drive roller 10 B drive roller , the target width B target and the width of the strand after exiting the second unit 4 - once without B aggregate 2 and once at application of B according to the invention is process - are in FIG. 9 shown.
  • the actual width of the rolling stock 5 or of the rolled product 12 is in turn measured immediately after the second unit 4 by the width measuring device 16. From the FIG. 9 shows that the actual width B actual of the rolled product 12 remains much longer within the width tolerance by the application, so that the Ausbringhine be reduced.
  • the rule scheme for the Fig. 8 and 9 is in FIG. 10 shown.
  • the width error e B Soll -B Ist is used to control a first train ⁇ 1 between the first 2 and the second unit 4 and to control a second train ⁇ 2 between the second 4 and the third unit 17, the resulting manipulated variables u 1 , u 2 interact with each other on the controlled system G.
  • both the gain factors K 1 and K 2 of the reinforcing members 14, the boundaries of the limiting members 15 and the controller R ⁇ for the first branch for influencing the train ⁇ 1 and for the second branch for influencing the train ⁇ 2 can be chosen differently.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Control Of Metal Rolling (AREA)
EP13765985.0A 2012-10-09 2013-09-17 Breitenbeeinflussung eines bandförmigen walzguts Active EP2906369B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012218353.1A DE102012218353A1 (de) 2012-10-09 2012-10-09 Breitenbeeinflussung eines bandförmigen Walzguts
PCT/EP2013/069240 WO2014056681A1 (de) 2012-10-09 2013-09-17 Breitenbeeinflussung eines bandförmigen walzguts

Publications (2)

Publication Number Publication Date
EP2906369A1 EP2906369A1 (de) 2015-08-19
EP2906369B1 true EP2906369B1 (de) 2016-11-02

Family

ID=49230717

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13765985.0A Active EP2906369B1 (de) 2012-10-09 2013-09-17 Breitenbeeinflussung eines bandförmigen walzguts

Country Status (8)

Country Link
US (1) US9764367B2 (enrdf_load_stackoverflow)
EP (1) EP2906369B1 (enrdf_load_stackoverflow)
KR (1) KR102131182B1 (enrdf_load_stackoverflow)
CN (1) CN104837574B (enrdf_load_stackoverflow)
DE (1) DE102012218353A1 (enrdf_load_stackoverflow)
IN (1) IN2015DN02529A (enrdf_load_stackoverflow)
RU (1) RU2643002C2 (enrdf_load_stackoverflow)
WO (1) WO2014056681A1 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3000539B1 (de) * 2014-09-24 2016-11-16 SMS group GmbH VERFAHREN ZUM GIEßEN UND WALZEN EINES ENDLOSEN STRANGGUTES
IT201700028768A1 (it) * 2017-03-15 2018-09-15 Danieli Off Mecc Impianto combinato di colata continua e laminazione di nastri metallici a caldo
CN112496085B (zh) * 2020-11-06 2023-04-28 邯郸钢铁集团有限责任公司 改善1500MPa级热轧超高强钢边浪缺陷的生产方法
CN112845615B (zh) * 2020-12-29 2022-09-30 中铝西南铝板带有限公司 一种铝合金带材轧制板形的宽度补偿方法
CN115608788B (zh) * 2022-08-23 2025-08-19 日照钢铁控股集团有限公司 无头连铸连轧带钢生产线控制方法、系统、介质、设备

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Also Published As

Publication number Publication date
IN2015DN02529A (enrdf_load_stackoverflow) 2015-09-11
EP2906369A1 (de) 2015-08-19
WO2014056681A1 (de) 2014-04-17
CN104837574A (zh) 2015-08-12
CN104837574B (zh) 2017-05-03
KR20150065862A (ko) 2015-06-15
US9764367B2 (en) 2017-09-19
DE102012218353A1 (de) 2014-04-10
RU2015117467A (ru) 2016-12-10
US20150258592A1 (en) 2015-09-17
KR102131182B1 (ko) 2020-07-08
RU2643002C2 (ru) 2018-01-29

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