EP2718035B1 - 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 Download PDF

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Publication number
EP2718035B1
EP2718035B1 EP12725808.5A EP12725808A EP2718035B1 EP 2718035 B1 EP2718035 B1 EP 2718035B1 EP 12725808 A EP12725808 A EP 12725808A EP 2718035 B1 EP2718035 B1 EP 2718035B1
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EP
European Patent Office
Prior art keywords
rolling
metal strip
thickness
roll stand
initial pass
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
EP12725808.5A
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German (de)
English (en)
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EP2718035A1 (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
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SMS Group GmbH
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Publication date
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Publication of EP2718035A1 publication Critical patent/EP2718035A1/fr
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Publication of EP2718035B1 publication Critical patent/EP2718035B1/fr
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    • 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 preamble of claim 1 is based on DE 10 2007 049 062 B3 ,
  • FIG. 3 the method shown there, which is state of the art, explained in more detail.
  • 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. That in the FIG. 3 shown method 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; please refer FIGS. 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; please refer Figure 3c ).
  • the work rolls of the rolling stands are all initially placed on the metal strip 200, see 3d figure ) before rolling on the first stand begins by feeding its work rolls to a nip having a predetermined piercing thickness; please refer 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; please refer 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 n'th roll stand of the rolling mill in accordance with the tensile stress between the n'ten and the n + 1'ten roll stand to a second predetermined piercing thickness, which is smaller than the first piercing thickness of the n'ten active rolling mill, is further reduced.
  • active rolling stands refers to those rolling stands of the rolling train which contribute to a reduction in the thickness of the metal strip by correspondingly small adjustment of their roll gap heights.
  • Rolling mills with open nip do not count to the active rolling stands in the sense of the invention; however, they may well be located between two active rolling stands within the rolling train. In this case, however, the rolling mills with open nip remain irrelevant to the method according to the invention.
  • steps a and b as well as the steps d and e can each be interchanged in their order. That is, it does not matter for the inventive method, whether the setting of the roll nip to a predetermined piercing thickness before the metal strip is transported to the respective 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.
  • 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 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 pierce thicknesses k with 1 ⁇ k ⁇ K of all n roll stands of the rolling train are preferably matched to one another such that the predetermined starting 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 strip in the method according to the invention therefore does not first pass through the open nips of all stands, but already when passing through the strip head through the rolling stands of the rolling mill, piercing of the metal strip takes place already at the strip 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 in the n + 1'th roll 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 n + 1'te mill stand.
  • FIG. 4 shows the boundary conditions of a stitch plan calculation for adjusting the nip of the work rolls in a rolling stand, 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.
  • FIGS. 1 and 2 are the same technical elements designated by the same reference numerals.
  • Two pairs of superimposed circles or roles denote in the FIGS. 1 and 2 always a pair of work rolls with a clamped nip.
  • 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 D 1, n before the metal strip 200 with the strip head 210 passes the nth roll stand nip; please refer FIG. 1a ).
  • the metal strip 200 is then brought further with its strip head 210 to the n'te roll stand, where it, including its tape head 210 is reduced to the first piercing thickness D 1n in its thickness; please refer Figure 1 b ).
  • the metal strip 200 is then according to Figure 1 c ) is transported from the nth roll stand to the n + 1'th roll stand, where it passes through the work rolls of the n + 1 set to the first piercing thickness D 1, n + 1 with D 1, n + 1 ⁇ D 1, n 't Walzgerüstes to learn a further reduction in thickness. It then builds a tensile stress in the metal strip between the n + 1'ten and n'ten roll stand. This tensile stress is measured by means of a tension measuring device 50, for example a tension measuring roller.
  • 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 n + 1'ten and the n + 2'ten roll stand can be used to perform a second reduction in thickness to a second predetermined piercing thickness D 2, n + 1 even in the n + 1'ten roll stand.
  • This thickness reduction is also preferably ramped as a function of time.
  • the second predetermined piercing thickness D 2, n + 1 already corresponds to the desired target thickness for the metal strip, see FIG. 1f ).
  • the rolling train may have more than two active rolling stands 300.
  • the method according to the invention described is preferably applied to all rolling mills of the rolling train, i. to expand in a horizontal direction.
  • the nip of at least one further upstream rolling mills is further reduced to a respective predetermined cutting thickness ,
  • FIG. 2 shows how finally the built-up tensile stress between the take-up reel 400 and the last rolling stand of the rolling train, ie the N'ten rolling stand, can be used to achieve a further reduction in thickness at the N'ten rolling stand, preferably towards the desired target thickness.
  • 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; please refer 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.

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

Claims (11)

  1. Procédé pour le laminage d'une bande métallique (200) dans un train de laminoir comprenant 1 ≤ n ≤ N et N ≥ 2 cages de laminoir actives disposées les unes derrière les autres dans la direction de laminage, comprenant les étapes suivantes consistant à :
    a) régler l'emprise de la nième cage de laminoir (300) à une première épaisseur de perçage prédéterminée Dk,n où k = 1 ;
    b) transporter la bande métallique avec la tête de bande (210) en avant à la nième cage de laminoir (300) ;
    c) percer la bande métallique à la première épaisseur de perçage prédéterminée Dk=1,n dans la nième cage de laminoir ;
    d) régler l'emprise de la nième +1 cage de laminoir (300) à une première épaisseur de perçage Dk=1,n+1 qui est inférieure à la première épaisseur de réglage Dk=1,n de la nième cage de laminoir active ;
    e) transporter la bande métallique à la nième + 1 cage de laminoir ;
    f) percer la bande métallique à la première épaisseur de perçage Dk=1,n+1 de la nième + 1 cage de laminoir ;
    g) créer une tension dans la bande métallique entre la nième cage de laminoir et la nième + 1 cage de laminoir ;
    caractérisé par
    h) la réduction de l'épaisseur de perçage de la nième cage de laminoir en fonction de la tension entre la nième et la nième + 1 cage de laminoir à une deuxième épaisseur de perçage prédéterminée D2,n qui est inférieure à la première épaisseur de perçage Dk=1,n de la nième cage de laminoir active.
  2. Procédé selon la revendication 1, caractérisé par la répétition à chaque fois des étapes d) à h) pour n = n+1 à n = N-1.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que, après avoir créé la tension entre la nième et la nième + 1 cage de laminoir, on réduit également davantage l'emprise d'au moins une des autres cages de laminoir précédentes x avec 1 ≤ x ≤ n-1 à une épaisseur de perçage chaque fois prédéterminée.
  4. Procédé selon la revendication 2 ou 3, caractérisé par :
    le transport ultérieur de la bande métallique après le passage de cette dernière par la Nième cage de laminoir avec la première épaisseur de perçage Dk=1,N à un dispositif de bobinage ;
    enrouler l'amorce de la bande métallique sur le dispositif de bobinage (400) ; et
    créer une tension dans la bande métallique entre le dispositif de bobinage et la Nième cage de laminoir ; et
    réduire l'épaisseur de perçage de la Nième cage de laminoir en fonction de la tension entre la Nième cage de laminoir et le dispositif de bobinage (400) à une deuxième épaisseur de perçage prédéterminée D2,N qui est inférieure à la première épaisseur de perçage Dk=1,N de la Nième cage de laminoir et inférieure à l'épaisseur de perçage en vigueur Dk=N-1 de la Nième - 1 cage de laminoir.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que les épaisseurs de perçage ou les hauteurs d'emprises réglées pour les cages de laminoir individuelles (300) sont calculées à l'avance de telle sorte qu'elles permettent, en prenant en compte les tensions à attendre et les propriétés matérielles de la bande métallique, d'obtenir à chaque fois la réduction d'épaisseur maximale possible pour la bande métallique.
  6. Procédé selon les revendications 3 et/ou 4, caractérisé en ce que les épaisseurs de perçage et la distribution des épaisseurs de perçage de toutes les cages actives de laminoir (300) du train de laminoir pour le laminage de la bande métallique sont calculées à l'avance de telle sorte qu'en ce qui concerne la kième épaisseur de perçage prédéterminée Dk,N de la Nième cage de laminoir, il s'agit de l'épaisseur cible désirée pour la bande métallique.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que, lors du passage de la bande métallique à travers les cages de laminoir du train de laminoir, le perçage de la bande métallique englobe de préférence également le perçage de la tête de bande.
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que la réduction des épaisseurs de perçage des cages de laminoir a lieu de manière progressive au cours du temps.
  9. Procédé selon la revendication 8, caractérisé en ce que la réduction de l'épaisseur de perçage à la nième + 1 cage de laminoir ne commence que lorsque la zone de la bande métallique qui a subi une réduction d'épaisseur par exemple conformément à une configuration cunéiforme, mise en oeuvre par une des cages de laminoir précédentes, atteint la nième + 1 cage de laminoir.
  10. Produit de programme informatique comprenant un code de programme à des fins d'exécution sur un microprocesseur dans le dispositif de commande d'un train de laminoir comprenant plusieurs cages de laminoir, caractérisé en ce que le code de programme est réalisé pour le démarrage des cages de laminoir et pour le transport de la bande métallique, conformément au procédé selon l'une quelconque des revendications 1 à 9.
  11. Train de laminoir comprenant :
    1 ≤ n ≤ N et N ≥ 2 cages de laminoir actives (300) disposées les unes derrière les autres dans la direction de laminage ;
    un dispositif de mesure de la tension (50) pour mesurer la tension entre deux cages actives disposées l'une derrière l'autre ; et
    un dispositif de commande pour le réglage individuel de l'emprise des cages de laminoir à une épaisseur de perçage chaque fois prédéterminée ;
    caractérisé en ce que le dispositif de commande et le train de laminoir sont conçus pour la mise en oeuvre du procédé selon l'une quelconque des revendications 1 à 9.
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 EP2718035A1 (fr) 2014-04-16
EP2718035B1 true EP2718035B1 (fr) 2015-08-12

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

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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)

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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
BR112017005936A2 (pt) * 2014-10-09 2017-12-19 Nippon Steel & Sumitomo Metal Corp método para produção de chapa metálica com linhas elevadas, chapa metálica com linhas elevadas, e componente estrutural
KR102234362B1 (ko) * 2020-02-26 2021-03-31 한국생산기술연구원 형상 압연 공정의 롤패스 설계 방법
JP7501451B2 (ja) 2021-06-07 2024-06-18 株式会社Tmeic 蛇行制御装置

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Publication number Publication date
RU2566132C2 (ru) 2015-10-20
DE102011078150A1 (de) 2012-12-13
US20140298877A1 (en) 2014-10-09
KR20140026573A (ko) 2014-03-05
CN103717323B (zh) 2016-01-27
CN103717323A (zh) 2014-04-09
EP2718035A1 (fr) 2014-04-16
WO2012168299A1 (fr) 2012-12-13
KR101535450B1 (ko) 2015-07-09
RU2013158949A (ru) 2015-07-20
US9364878B2 (en) 2016-06-14
ES2546316T3 (es) 2015-09-22

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