EP2718035A1 - Procédé, programme informatique et train de laminoir destiné à laminer une bande métallique - Google Patents

Procédé, programme informatique et train de laminoir destiné à laminer une bande métallique

Info

Publication number
EP2718035A1
EP2718035A1 EP12725808.5A EP12725808A EP2718035A1 EP 2718035 A1 EP2718035 A1 EP 2718035A1 EP 12725808 A EP12725808 A EP 12725808A EP 2718035 A1 EP2718035 A1 EP 2718035A1
Authority
EP
European Patent Office
Prior art keywords
rolling
piercing
thickness
metal strip
stand
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.)
Granted
Application number
EP12725808.5A
Other languages
German (de)
English (en)
Other versions
EP2718035B1 (fr
Inventor
Andreas Ritter
Peter Sudau
Markus Koch
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 Group GmbH
Original Assignee
SMS 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 Siemag AG filed Critical SMS Siemag AG
Publication of EP2718035A1 publication Critical patent/EP2718035A1/fr
Application granted granted Critical
Publication of EP2718035B1 publication Critical patent/EP2718035B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • B21B37/58—Roll-force control; Roll-gap control
    • 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
    • B21B37/48—Tension control; Compression control
    • 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
    • B21B2013/006—Multiple strand rolling mills; Mill stands with multiple caliber rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2271/00—Mill stand parameters
    • B21B2271/02—Roll gap, screw-down position, draft position
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2273/00—Path parameters
    • B21B2273/06—Threading
    • B21B2273/08—Threading-in or before threading-in

Definitions

  • the invention relates to a method, a computer program and a rolling train for rolling a metal strip.
  • the rolling train comprises N in the rolling direction successively arranged active rolling stands.
  • the starting point is a four-stand tandem rolling mill 10, which has a pay-out reel 8 and a take-up reel 12 downstream.
  • the method shown in Figure 3 for cold rolling a metal strip 200 provides that initially all scaffolds of the tandem mill 10 are driven up, so that first the metal strip is passed with the tape head 210 without thickness reduction through the roll nips of the rolling stands to the take-up reel 12 to be wound there; see Figures 3a and b). With the winding creates a tensile stress in the metal strip between the take-up reel 12 and the unwinding reel 8; see Figure 3c).
  • the work rolls of the rolling stands are all first placed on the metal strip 200, see Figure 3d), before rolling on the first stand begins, in which its work rolls are fed to a nip having a predetermined piercing thickness; see FIG. 3e).
  • the thickness jump in the metal strip caused in this way by the first roll stand then passes sequentially through all following rolling stands of the tandem mill 10. In this case, a successive start of the rolling takes place on the individual stands, as soon as said thickness jump passes through the respective stand; see Figures 3f and 3g).
  • the last rolling mill of the tandem mill is preferably set to the desired target thickness for the metal strip.
  • the invention has the object of developing a method, a computer program and a rolling mill for cold rolling a metal strip to the effect that the unwanted65cons be significantly shortened.
  • This object is achieved by the method claimed in claim 1.
  • This method is characterized in that the piercing thickness of the nth rolling stand of the rolling mill is set to a second predetermined piercing thickness smaller than the first piercing thickness of the nth in accordance with the tensile stress between the nth and the n + 1 'th rolling stand active rolling mill, is further reduced.
  • active rolling mills refers to those rolling mills of the rolling mill which contribute to a reduction in the thickness of the metal strip by setting their nip height accordingly.
  • Roll mills with an open nip are not included in the active rolling mills in the sense of the invention, but they can easily be used between two active mills within In this case, however, the rolling mills with open nip remain irrelevant to the method according to the invention.
  • the order of steps of the method according to the invention is not necessarily strictly adhered to. Thus, the steps a and b as well as the steps d and e can each be interchanged in their order.
  • the inventive method whether the setting of the roll nip to a predetermined piercing thickness before the metal strip is transported to the respective rolling stand or after the metal strip or the tape head of the metal strip has already arrived on the input side of the rolling stand. In any case, the setting of the roll gap should be completed, however, if the respective relevant point of the metal strip from which a reduction in thickness is to take place, has come into the nip.
  • the parameter n designates the rolling mills of the rolling train arranged one behind the other in the rolling direction.
  • the parameter k denotes the number of changes made, in particular reductions, the piercing thickness per roll stand per rolling process.
  • the parameter x designates the rolling stands upstream of the rolling stand n.
  • the piercing thicknesses are parameterized in the present description in each case with the two parameters k and n.
  • the piercing thicknesses are typically functions of the time; ie the changes in piercing thicknesses are time-dependent. Structure of the tensile stress in the present invention means an increase in the tensile stress.
  • the advantage of the method according to the invention is that a built-up and recognized modified tensile stress in the metal strip between the nth and n + 1'th roll stand is used to further reduce the piercing thickness on the n'ten active rolling stand.
  • the method according to the invention makes it possible in this way, already with the cold rolling of the metal strip, i. begin with the thickness reduction of the metal strip before the tape head reaches the take-up reel and is wound by this to build up tensile stress.
  • the structure of the tensile stress is advanced by the inventive method spatially and temporally from the take-up reel on the first active rolling stands. In this way, a very significant reduction of unwanted span jointly filed.
  • the method according to claim 1 is particularly advantageously applied not only to two adjacent active rolling stands n and n + 1 of the rolling train, but preferably to all rolling mills or roll stand pairings of the rolling train.
  • almost all rolling mills n with n ⁇ n ⁇ N-1 would be set sequentially not only to a first, but also at least to a second, further reduced predetermined piercing thickness.
  • the respective settings or changes in the piercing thicknesses of the individual rolling mills just described are precalculated in each case in a control device of the rolling train.
  • the calculation and Determining in each case so that in each rolling stand, taking into account the expected tensile stresses and the material properties of the stock metal strip and taking into account the technological limitations, the inlet thickness and the target thickness, the maximum possible thickness reduction for the metal strip is set. This leads to a further optimization of the method according to the invention and thus to a further reduction of the unwanted dimension lengths.
  • All piercing thicknesses k with 1 ⁇ k ⁇ K of all rolling mills of the rolling train are preferably matched to one another such that the K'ten predetermined piercing thickness D K, N of the N'th rolling stand is the desired target thickness for the metal strip.
  • the method according to the invention preferably already starts at the head of the respective metal strip, likewise in order to reduce the dimension lengths.
  • the beginning of the tape in the method according to the invention does not first pass through the open nips of all scaffolds, but already when passing through the tape head through the rolling stands of the rolling mill, piercing of the metal strip is already on the belt head.
  • the reduction of the piercing thicknesses in the individual rolling stands is preferably not discontinuous in the sense of a jump function, but continuous, e.g. ramped over time.
  • Reducing the piercing thicknesses at the ⁇ + 1 'th rolling stand advantageously begins only when that of one of the preceding Rolled mills generated, for example, wedge-shaped thickness-reduced portion of the metal strip reaches the ⁇ + 1 'te roll stand.
  • FIG. 4 shows the boundary conditions of a stitch plan calculation for adjusting the nip of the work rolls in a rolling mill, as known from the prior art.
  • the stitch plan calculation takes into account technological boundary conditions, such as the features of the metal strip on the inlet and outlet side, the inlet thickness, the desired target thickness and technological limitations.
  • the calculation of the maximum possible piercing thickness takes place with additional consideration of the material of the metal strip to be rolled, the friction between the work rolls and the metal strip and taking into account further framework data.
  • the rolling model then calculates the required parameters for setting the work rolls, ie the rolling force, the rolling moment, the roll bending, the displacement, the Outlet thickness and gain factors of the technical regulation and in particular also the said maximum possible piercing thickness.
  • the method according to the invention provides in a first method step a) for the nip roll nip to be set to a predetermined first piercing thickness n before the metal strip 200 with the strip head 210 passes the nip roll nip; see Figure 1 a).
  • the metal strip 200 is then brought with its tape head 210 further to the n'te mill stand, where it, including its tape head 210 is reduced to the first piercing thickness D 1 n in its thickness; see Figure 1 b).
  • the metal strip 200 is then further transported according to FIG. 1 c) from the nth roll stand to the ⁇ + 1 'th roll stand, where it is set by the first piercing thickness D 1 in + 1 with Di , n + i ⁇ D 1 n Working rolls of the ⁇ + 1 'th rolling mill to learn a further reduction in thickness. It then builds a tensile stress in the metal strip between the ⁇ + 1 'and the n'ten roll stand.
  • This tensile stress is measured by means of a tension measuring device 50, for example a tension measuring roller.
  • the method according to the invention then further provides that then the piercing thickness at the n'th roll stand is further reduced to a second predetermined piercing thickness D 2, n .
  • the second piercing thickness of the nth rolling stand is less than its first piercing thickness.
  • This reduction of the piercing thickness at the nth roll stand preferably takes place in a ramp over time, resulting in a wedge-shaped decrease in the thickness of the metal strip 200.
  • the structure of a tensile stress between the ⁇ + 1 'th and the ⁇ + 2'ten roll stand can be used to perform a second reduction in thickness to a second predetermined piercing thickness D 2, n + i even in the ⁇ + 1' th rolling mill.
  • This thickness reduction is also preferably ramped as a function of time.
  • the second predetermined piercing thickness D 2, n + i already corresponds to the desired target thickness for the metal strip, see FIG. 1 f).
  • the rolling train may have more than two active rolling stands 300.
  • the described method according to the invention is preferably to be extended to all rolling mills of the rolling train, ie quasi in the horizontal direction.
  • Figure 2 shows how, finally, also the built-up tension between the take-up reel 400 and the last stand of the rolling train, i.
  • the N'ten rolling stand can be used to achieve a further reduction in thickness, preferably towards the desired target thickness at the N'ten rolling stand.
  • the coiling results in the formation of a tensile stress in the metal strip between the take-up reel 400 and the N'ten stand 300, which is detected by the tension measuring device 50; see Figure 2c).
  • This recognized increase in draft between the take-up reel 400 and the nth roll stand can then be used to further reduce the piercing thickness at the stand, preferably to the desired target thickness.
  • the last setting of the roll gap on the first roll stand takes place when the reduction of the piercing thickness of the metal strip realized thereby is sufficient to roll the desired target thickness at the exit of the N'th roll stand of the rolling train.
  • the method according to the invention also applies to a reversing cold rolling mill. After the first pass through the reversing road then reaches the metal strip then on the frame N is not yet the desired target thickness. The process is then repeated for at least one return and re-runs through the road until the desired target thickness is reached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)
  • Metal Rolling (AREA)

Abstract

L'invention concerne un procédé, un programme informatique et un train de laminoir destiné à laminer à froid une bande métallique (200). L'invention vise à obtenir un raccourcissement de longueurs dimensionnelles non souhaitées. A cet effet, la tête (210) de la bande métallique (200) subit déjà pour la première cage de laminoir active (n) du train de laminoir une réduction de l'épaisseur puis continue d'être transportée vers la cage de laminoir suivante, afin d'y subir une autre réduction de l'épaisseur. Selon le procédé selon l'invention, l'épaisseur d'incision continue d'être réduite sur la n-ième cage de laminoir si l'on s'en tient à l'effort de traction établi entre-temps entre la n+1-ième et la n-ième cage de laminoir.
EP12725808.5A 2011-06-08 2012-06-06 Procédé, programme informatique et train de laminoir destiné à laminer une bande métallique Active EP2718035B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102011106327 2011-06-08
DE102011078150A DE102011078150A1 (de) 2011-06-08 2011-06-27 Verfahren, Computerprogramm und Walzstraße zum Walzen eines Metallbandes
PCT/EP2012/060698 WO2012168299A1 (fr) 2011-06-08 2012-06-06 Procédé, programme informatique et train de laminoir destiné à laminer une bande métallique

Publications (2)

Publication Number Publication Date
EP2718035A1 true EP2718035A1 (fr) 2014-04-16
EP2718035B1 EP2718035B1 (fr) 2015-08-12

Family

ID=47220453

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12725808.5A Active EP2718035B1 (fr) 2011-06-08 2012-06-06 Procédé, programme informatique et train de laminoir destiné à laminer une bande métallique

Country Status (8)

Country Link
US (1) US9364878B2 (fr)
EP (1) EP2718035B1 (fr)
KR (1) KR101535450B1 (fr)
CN (1) CN103717323B (fr)
DE (1) DE102011078150A1 (fr)
ES (1) ES2546316T3 (fr)
RU (1) RU2566132C2 (fr)
WO (1) WO2012168299A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104148383B (zh) * 2014-06-28 2016-01-13 济钢集团有限公司 双机架冷轧机闭辊缝穿带轧制方法
EP3205415B1 (fr) 2014-10-09 2020-05-13 Nippon Steel Corporation Procédé de production d'une plaque métallique à arêtes saillantes
KR102234362B1 (ko) * 2020-02-26 2021-03-31 한국생산기술연구원 형상 압연 공정의 롤패스 설계 방법

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US3762195A (en) * 1970-03-09 1973-10-02 Hitachi Ltd Thickness control apparatus for rolling mill
JPS5832503A (ja) * 1981-08-22 1983-02-25 Sumitomo Metal Ind Ltd タンデムミルの連続圧延方法
DE3317635A1 (de) * 1983-05-14 1984-11-15 Fried. Krupp Gmbh, 4300 Essen Warmwalzverfahren
US4782683A (en) * 1986-03-03 1988-11-08 Tippins Incorporated Hot strip mill shape processor and method
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US4998427A (en) * 1989-11-29 1991-03-12 Aeg Westinghouse Industrial Automation Corporation Method for rolling on-gauge head and tail ends of a workpiece
IT1259487B (it) * 1992-08-26 1996-03-20 Danieli Off Mecc Procedimento per la produzione di lamiere sottili ed impianto di laminazione compatto adottante tale procedimento
US5706690A (en) * 1995-03-02 1998-01-13 Tippins Incorporated Twin stand cold reversing mill
SE507111C2 (sv) * 1995-07-07 1998-03-30 Moelnlycke Ab Fastsättningsorgan för att med varandra förbinda motstående främre och bakre sidopartier hos ett absorberande alster
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RU2207205C2 (ru) 2001-08-29 2003-06-27 Открытое акционерное общество "Новолипецкий металлургический комбинат" Способ регулирования толщины полосы
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Also Published As

Publication number Publication date
CN103717323B (zh) 2016-01-27
RU2566132C2 (ru) 2015-10-20
ES2546316T3 (es) 2015-09-22
EP2718035B1 (fr) 2015-08-12
RU2013158949A (ru) 2015-07-20
WO2012168299A1 (fr) 2012-12-13
KR20140026573A (ko) 2014-03-05
KR101535450B1 (ko) 2015-07-09
US9364878B2 (en) 2016-06-14
DE102011078150A1 (de) 2012-12-13
CN103717323A (zh) 2014-04-09
US20140298877A1 (en) 2014-10-09

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