EP2379241B1 - Cage de laminoir pour laminer un produit notamment métallique - Google Patents

Cage de laminoir pour laminer un produit notamment métallique Download PDF

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Publication number
EP2379241B1
EP2379241B1 EP09799260.6A EP09799260A EP2379241B1 EP 2379241 B1 EP2379241 B1 EP 2379241B1 EP 09799260 A EP09799260 A EP 09799260A EP 2379241 B1 EP2379241 B1 EP 2379241B1
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Prior art keywords
rolls
roll
radius
course
coefficients
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EP09799260.6A
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German (de)
English (en)
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EP2379241A1 (fr
Inventor
Jürgen Seidel
Olaf Norman Jepsen
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SMS Siemag AG
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SMS Siemag AG
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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
    • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
    • 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
    • B21B13/14—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls
    • B21B13/142—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories having counter-pressure devices acting on rolls to inhibit deflection of same under load; Back-up rolls by axially shifting the rolls, e.g. rolls with tapered ends or with a curved contour for continuously-variable crown CVC
    • 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
    • B21B27/02—Shape or construction of 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
    • B21B27/02—Shape or construction of rolls
    • B21B27/021—Rolls for sheets or strips
    • 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
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B2013/025—Quarto, four-high stands
    • 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
    • B21B13/02—Metal-rolling stands, i.e. an assembly composed of a stand frame, rolls, and accessories with axes of rolls arranged horizontally
    • B21B2013/028—Sixto, six-high stands
    • 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
    • B21B37/40—Control of flatness or profile during rolling of strip, sheets or plates using axial shifting of the rolls

Definitions

  • the invention relates to a roll stand for rolling a metal material, in particular, comprising a pair of first rolls contacted by a pair of second rolls supporting the first rolls, the first rolls and the second rolls having a radius profile (CVC) asymmetric with respect to a center plane -Slip), the radius profile of the first rolls being represented by a polynomial of the third or fifth order.
  • CVC radius profile
  • Such a rolling stand is from the EP 1 307 302 B1 known.
  • a polynomial course of the type mentioned is provided as a radius profile to minimize the axial forces of the roller bearings, which can be minimized by appropriate choice of the radius profile in the horizontal direction acting moments without additional effort.
  • the wedge portion of the CVC work roll contour is provided.
  • the design is such that the wedging of the work roll grinding or the work roll contour is optimized to avoid rotational moments or axial forces.
  • the linear part of the polynomial (a 1 ) is used as an optimization parameter. This avoids cross-rolling of the rolls and minimizes the axial forces in the roll bearings.
  • the said solution according to the EP 1 307 302 B1 is based on a profiling of the work rolls, which interact with cylindrical support rollers. This is the optimization of the wedge of the work rolls off. Efforts are underway to extend the CVC system positioning range to further increase the tape profile setting range. In order to avoid high surface pressures between working and support rollers, increasingly CVC backup rollers are used. However, it has turned out that In order to optimize the taper of the CVC contour of the back-up rolls, it is not possible to use the same design as for the work roll, if optimal conditions are desired.
  • the invention is therefore based on the object, a rolling stand of the type mentioned in such a way that the wedging of a first roller supporting second roller (usually, but not exclusively: the wedging of a support roller, which cooperates with a work roll) is designed so that to set optimal operating conditions.
  • the coefficients a 4 and a 5 of the radius profile of the first rolls can be zero.
  • the course of the radius of the first rolls is represented as a third order polynomial, while the course of the radius of the second rolls is shown as a fifth order polynomial.
  • the coefficients s 4 and s 5 of the radius profile of the second rolls are zero. Then, the course of the radius of the first rolls is represented as a fifth order polynomial, while the course of the radius of the second rolls is represented as a third order polynomial.
  • the radius profile of the first rollers is designed such that the tangent, which touch an end diameter and the convex portion of the roller, and the tangent, which touch the other end diameter and the concave portion of the roller, parallel to each other and inclined with respect to the roll axes inclined by a wedge angle.
  • the first rolls are preferably work rolls and the second rolls are preferably back-up rolls.
  • the rolling mill is a Sextogerüst and the first rolls are intermediate rolls and the second rolls are backup rolls.
  • the respective linear component (wedge component), the contact length and the diameter of the corresponding adjacent roller are taken into account.
  • Fig. 1 is a rolling 1 to see in the form of a metal slab, which is rolled by two first rolls 2 in the form of work rolls.
  • the first rollers 2 are supported by second rollers 3, namely back-up rollers.
  • the work rolls 2 and the support rollers 3 have a so-called. CVC ship, ie with respect to a center plane 4, the profile is not symmetrical. Details on this are in the mentioned EP 1 307 302 B1 described. Accordingly, the rollers 2, 3 over the coordinate x in the bale longitudinal direction have a functional course resulting from nth-order polynomials, with third- or fifth-order polynomials being preferred or, for the most part, sufficient.
  • the roll gap can be influenced accordingly.
  • the load between the work rolls 2 and the backup rolls 3 is over the contact area b cont (s. Fig. 2 ) unevenly distributed and changes with the shift position of the work rolls.
  • the resulting from the roll shapes loads and the local positive or negative relative speed lead - as in Fig. 2 is illustrated - to different circumferential forces Q i over the contact width b cont .
  • the distribution of the roller peripheral force Q i creates a moment M around the center of the rolling stand, which can lead to the "rolling" of the rolls and thus to axial forces in the roll bearings. This can be avoided by giving the rolls a corresponding cut. In the present case this is done with a radius course, which is given as a polynomial of the third or fifth order.
  • the radius profile of the work rolls 2 is formed so that the tangent 5, the end diameter 6 and the convex portion of the work roll 2 touch, and the tangent 7, the other end diameter 8 and the concave portion of the Touch roller 2, parallel to each other and inclined relative to the roll axes by a wedge angle ⁇ .
  • the rule for the design of the work roll contour and the definition of the wedge component (linear coefficient of the polynomial function) are obtained according to or very similar to those already known EP 1 307 302 B1 ,
  • the coefficients a 2 , a 3 , a 4 and a 5 result from the desired setting range or effect in the roll gap.
  • the contact length between the working and support rollers or, alternatively, the working roller length for the design of the CVC work rolls and, in particular, for the wedge component (a 1 ) is to be used as the contact width, as in US Pat EP 1 307 302 B1 described. If these rules are adhered to, the work roll contours and, in particular, the a 1 coefficient (wedge component) are optimally designed.
  • wedge component s 1 of the backup roll contour which can also be described by a polynomial function, similar relationships apply (which can be calculated iteratively offline).
  • the values for the wedge component s 1 vary depending on the associated work roll contour and length.
  • the backup roll form must therefore be adapted to the work roll shape.
  • the coefficients s 2 , s 3 , s 4 and s 5 result from the desired adjustment range or adaptation to the work roll S shape.
  • the above-mentioned procedure for the design of the support roller contour applies here.
  • the coefficient s 3 is equal to zero.
  • the procedure can be carried out in the same way.
  • the work roll is designed analogously.
  • the design of the wedging of the intermediate roll is carried out as in the backup roll.
  • the design of the support roll of the Sexto is carried out analogously to the design of the quarto support roll.
  • the respective linear component, the contact length and the diameter of the corresponding adjacent roller are taken into account.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Metal Rolling (AREA)
  • Rolling Contact Bearings (AREA)

Claims (10)

  1. Cage de laminoir pour le laminage d'un produit en particulier métallique (1), qui présente une paire de premiers cylindres (2) qui entrent en contact avec une paire de deuxièmes cylindres (3) supportant les premiers cylindres, les premiers cylindres (2), ainsi que les deuxièmes cylindres (3) étant munis d'une allure de rayon réalisée de manière asymétrique par rapport à un plan médian (4), ce que l'on appelle un poli CVC, l'allure du rayon des premiers cylindres (2) répondant à l'équation : R AW x = a 0 + a 1 * x + a 2 * x 2 + a 3 * x 3
    Figure imgb0025
    dans laquelle :
    RAW(x) représente l'allure du rayon des premiers cylindres ;
    x représente une coordonnée dans la direction longitudinale du corps de cylindre, la limite x=0 étant située au milieu du corps de cylindre ;
    a0 représente le rayon en vigueur des premiers cylindres ;
    a1 représente un paramètre d'optimisation, facteur de cunéiformité ;
    a2, a3 représentent des coefficients, domaine de réglage du système CVC,
    caractérisée en ce que l'allure du rayon des deuxièmes cylindres (3) répond à l'équation : R SW x = s 0 + s 1 * x + s 2 * x 2 + s 3 * x 3
    Figure imgb0026
    dans laquelle :
    Rsw(x) représente l'allure du rayon des deuxièmes cylindres ;
    x représente une coordonnée dans la direction longitudinale du corps de cylindre, la limite x=0 étant située au milieu du corps de cylindre ;
    s0 représente le rayon en vigueur des premiers cylindres ;
    s1 représente un paramètre d'optimisation, facteur de cunéiformité ;
    s2, s3 représentent des coefficients, domaine de réglage du système CVC,
    les valeurs mentionnées répondant à l'équation suivante : s 1 = f 1 * R SW / R AW * b 2 contAW - b 2 contSW * a 3 + b 2 contSW * s 3
    Figure imgb0027
    dans laquelle
    bcontAW représente la longueur de contact des deux premiers cylindres ;
    bcontSW représente la longueur de contact entre les premiers et les deuxièmes cylindres ou bien la longueur des deuxièmes cylindres ;
    f1 = de -1/20 à -6/20.
  2. Cage de laminoir selon la revendication 1, caractérisée en ce que les coefficients de l'allure du rayon des premiers cylindres (2) répondent à l'équation : a 1 = f 1 * a 3 * b 2 contAW
    Figure imgb0028
    dans laquelle :
    f1 = de -1/20 à -6/20
  3. Cage de laminoir pour le laminage d'un produit en particulier métallique (1), qui présente une paire de premiers cylindres (2) qui entrent en contact avec une paire de deuxièmes cylindres (3) supportant les premiers cylindres, les premiers cylindres (2), ainsi que les deuxièmes cylindres (3) étant munis d'une allure de rayon réalisée de manière asymétrique par rapport à un plan médian (4), ce que l'on appelle un poli CVC, l'allure du rayon des premiers cylindres (2) répondant à l'équation : R AW x = a 0 + a 1 * x + a 2 * x 2 + a 3 * x 3 + a 4 * x 4 + a 5 * x 5
    Figure imgb0029
    dans laquelle :
    RAW(x) représente l'allure du rayon des premiers cylindres ;
    x représente une coordonnée dans la direction longitudinale du corps de cylindre ;
    a0 représente le rayon en vigueur des premiers cylindres ;
    a1 représente un paramètre d'optimisation, facteur de cunéiformité ;
    a2 à a5 représentent des coefficients, domaine de réglage du système CVC,
    caractérisée en ce que l'allure du rayon des deuxièmes cylindres (3) répond à l'équation : R SW x = s 0 + s 1 * x + s 2 * x 2 + s 3 * x 3 + s 4 * x 4 + s 5 * x 5
    Figure imgb0030
    dans laquelle :
    Rsw(x) représente l'allure du rayon des deuxièmes cylindres ;
    x représente une coordonnée dans la direction longitudinale du corps de cylindre ;
    s0 représente le rayon en vigueur des deuxièmes cylindres ;
    s1 représente un paramètre d'optimisation, facteur de cunéiformité ;
    s2 à s5 représentent des coefficients, domaine de réglage du système CVC,
    les valeurs mentionnées répondant à l'équation suivante : s 1 = f 1 * R SW / R AW * b 2 contAW - b 2 contSW * a 3 + b 2 contSW * s 3 * + f 2 * R SW / R AW * b 4 contAW - b 4 contSW * a 5 + b 4 contSW * s 5 *
    Figure imgb0031
    dans laquelle
    bcontAW représente la longueur de contact des deux premiers cylindres ;
    bcontSW représente la longueur de contact entre les premiers et les deuxièmes cylindres ou bien la longueur des deuxièmes cylindres ;
    f1 = de -1/20 à -6/20 ;
    f2 = de 0 à -9/112.
  4. Cage de laminoir selon la revendication 3, caractérisée en ce que les coefficients de l'allure du rayon des premiers cylindres (2) répondent à l'équation : a 1 = f 1 * a 3 * b 2 contAW + f 2 * a 5 * b 4 contAW
    Figure imgb0032
    dans laquelle :
    f1 = de -1 /20 à -6/20 ;
    f2 = de 0 à -9/112.
  5. Cage de laminoir selon la revendication 3 ou 4, caractérisée en ce que les coefficients a4 et a5 de l'allure du rayon des premiers cylindres (2) sont nuls.
  6. Cage de laminoir selon la revendication 3 ou 4, caractérisée en ce que les coefficients s4 et s5 de l'allure du rayon des deuxièmes cylindres (2) sont nuls.
  7. Cage de laminoir selon l'une quelconque des revendications 1 à 6, caractérisée en ce que l'allure du rayon RAW(x) des premiers cylindres (2) et/ou l'allure du rayon RSW(x) des deuxièmes cylindres (3) sont réalisées de telle sorte que la tangente (5) qui touche un diamètre terminal (6) et la partie convexe des cylindres (2) et les tangente (7) qui touche l'autre diamètre terminal (8) et la partie convexe des cylindres (2) s'étendent parallèlement l'une à l'autre et en inclinaison par rapport aux axes des cylindres en formant un angle d'attaque α.
  8. Cage de laminoir selon la revendication 1 ou 3, caractérisée en ce que les premiers cylindres sont des cylindres de travail (2) et les deuxièmes cylindres sont des cylindres de support (3).
  9. Cage de laminoir selon la revendication 1 ou 3, caractérisée en ce que la cage de laminoir est une cage de type sexto et les premiers cylindres sont des cylindres intermédiaires et les deuxièmes cylindres sont des cylindres de support.
  10. Cage de laminoir selon l'une quelconque des revendications 1 à 9, constituée par plusieurs cylindres, caractérisée en ce que, d'une manière générale, la fraction linéaire respective, la longueur de contact et le diamètre des cylindres voisins correspondants sont pris en considération lors de la détermination des coefficients.
EP09799260.6A 2008-12-17 2009-12-15 Cage de laminoir pour laminer un produit notamment métallique Active EP2379241B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102008062402 2008-12-17
DE102009021414A DE102009021414A1 (de) 2008-12-17 2009-05-15 Walzgerüst zum Walzen eines insbesondere metallischen Guts
PCT/EP2009/008989 WO2010075961A1 (fr) 2008-12-17 2009-12-15 Cage de laminoir pour laminer un produit notamment métallique

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Publication Number Publication Date
EP2379241A1 EP2379241A1 (fr) 2011-10-26
EP2379241B1 true EP2379241B1 (fr) 2014-02-12

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US (1) US9180503B2 (fr)
EP (1) EP2379241B1 (fr)
JP (1) JP5506815B2 (fr)
KR (1) KR101312453B1 (fr)
CN (1) CN102256715B (fr)
BR (1) BRPI0923000A2 (fr)
CA (1) CA2745945C (fr)
DE (1) DE102009021414A1 (fr)
ES (1) ES2449867T3 (fr)
UA (1) UA100613C2 (fr)
WO (1) WO2010075961A1 (fr)

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CN104722585A (zh) * 2015-03-13 2015-06-24 李慧峰 板带轧机不对称板形的补偿方法
EP3124130A1 (fr) * 2015-07-28 2017-02-01 Primetals Technologies Austria GmbH Meule de cylindre destinee a l'evitement cible de quarts d'onde
CN105436215B (zh) * 2015-12-08 2018-10-30 北京首钢冷轧薄板有限公司 一种cvc窜辊连接装置工作位置检测方法
CN106955891B (zh) * 2016-01-08 2018-07-06 宝山钢铁股份有限公司 适合于冷连轧机组的工作辊配辊方法
CN111957746A (zh) * 2020-09-02 2020-11-20 苏州市职业大学 一种控制带材板型的轧辊及辊型设计方法
CN112296098B (zh) * 2020-09-18 2022-08-02 江苏沙钢集团有限公司 一种改善热轧薄带钢表面质量的方法
CN113198842B (zh) * 2021-04-15 2022-12-16 首钢集团有限公司 一种工作辊及轧制控制方法

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Publication number Publication date
UA100613C2 (ru) 2013-01-10
ES2449867T3 (es) 2014-03-21
JP2012511432A (ja) 2012-05-24
KR20110083721A (ko) 2011-07-20
DE102009021414A1 (de) 2010-07-01
CA2745945C (fr) 2014-02-04
CN102256715B (zh) 2014-02-05
US20110289996A1 (en) 2011-12-01
BRPI0923000A2 (pt) 2015-12-15
CN102256715A (zh) 2011-11-23
EP2379241A1 (fr) 2011-10-26
CA2745945A1 (fr) 2010-07-08
RU2011129608A (ru) 2013-01-27
KR101312453B1 (ko) 2013-09-27
WO2010075961A1 (fr) 2010-07-08
JP5506815B2 (ja) 2014-05-28
US9180503B2 (en) 2015-11-10

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