EP2379243B1 - Procédé d'étalonnage de deux cylindres de travail coopérant entre eux dans une cage de laminoir - Google Patents

Procédé d'étalonnage de deux cylindres de travail coopérant entre eux dans une cage de laminoir Download PDF

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Publication number
EP2379243B1
EP2379243B1 EP09799266.3A EP09799266A EP2379243B1 EP 2379243 B1 EP2379243 B1 EP 2379243B1 EP 09799266 A EP09799266 A EP 09799266A EP 2379243 B1 EP2379243 B1 EP 2379243B1
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EP
European Patent Office
Prior art keywords
stand
working rolls
determined
rolls
rolling
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Active
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EP09799266.3A
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German (de)
English (en)
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EP2379243A2 (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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Publication of EP2379243A2 publication Critical patent/EP2379243A2/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/10—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-gap, e.g. pass indicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/10—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-gap, e.g. pass indicators
    • B21B38/105—Calibrating or presetting roll-gap
    • 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
    • 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
    • B21B2269/00—Roll bending or shifting
    • B21B2269/12—Axial shifting the rolls
    • B21B2269/14—Work rolls
    • 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
    • B21B31/18—Adjusting or positioning rolls by moving rolls axially
    • 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
    • B21B37/64—Mill spring or roll spring compensation systems, e.g. control of prestressed mill stands

Definitions

  • the invention relates to a method for calibrating a roll stand, in which pressed to determine the relative pivotal position of the set of rollers for setting a symmetrical roll gap and / or for determining the elongation of the roll stand before the actual rolling process, the set of rolls under specification of a radial force and the resulting deformation of the roll stand is preferably measured on the piston-cylinder unit, wherein the determined therefrom pivot position of the set of rollers and / or the scaffold module determined therefrom (M) is used in the subsequent rolling of a rolling stock between the work rolls in the employment of the set of rolls, see eg JP-A 6030508 ,
  • Roll stands are well known in which two cooperating work rolls are supported by (at least) two back-up rolls, for example, to roll a steel strip. It is exemplified on the EP 0 763 391 B1 and pointed out.
  • Axialverschiebesysteme be provided for the work rolls are the work rolls during calibration in a normal position (axial displacement is zero).
  • the work rolls are pressed directly against one another and the expansion curve is recorded, from this the scaffold module is determined and the roll gap adjusted in parallel or symmetrically. This takes place before the rolling process.
  • the conditions during calibration are simulated with a computer program and converted to the rolling conditions (bandwidth) in order to be able to precisely set the setting position and thus the strip thickness.
  • the bandwidth is usually much narrower than the contact width between the two work rolls. This results in different contact conditions once during calibration and once during rolling. This in turn leads to different skeletal strains in the two cases mentioned.
  • the framework module varies depending on the relative axial displacement between the work rolls. Furthermore, the axial displacement changes the geometric conditions in the nip and between the working and support rollers. This applies in particular when cylindrical rolls are not used, but those with asymmetrical profiles (eg with CVC cut or similar shape).
  • the work rolls of rolling mills with shift are usually longer than the length of the support rollers by twice the amount moved or the length of the work rolls in conventional rolling mills without axial displacement.
  • the invention is therefore the object of the method of the type described above to train so that it is possible in a simple manner to take into account the effect of different elongation of the framework during calibration and rolling. This is to achieve a higher accuracy in rolling.
  • calibration should be carried out to obtain a more accurate scaffolding module and reliable tilt of the rollers.
  • the solution of this problem by the invention is characterized in that the work rolls are axially adjustable starting from a non-axially displaced zero position relative to each other, wherein the determination of the pivot position for the adjustment of a symmetrical roll gap and / or the determination of the scaffold module at a relative displacement position of the work rolls, which is not equal to the zero position (calibration position), wherein the determined pivot position and / or the value for the scaffold module stored and calculated for the further calculation of Swivel position and / or the employment of the set of rolls during rolling of the rolling stock are utilized.
  • a very preferred embodiment provides that the determination of the pivot position for the setting of a symmetrical roll gap and / or the determination of the scaffold module takes place at least twice, namely in a first relative axial position of the work rolls and in a second relative axial position of the work rolls, wherein the first relative axial position of the second relative axial position is different and wherein the at least two determined pivot positions and / or values for the scaffold module are stored and used mathematically for the further calculation of the pivot position and / or the employment of the set of rolls during rolling of the rolling stock.
  • more than two pivoting positions and / or scaffold modules are determined at more than two different relative axial positions of the work rolls.
  • three to six pivotal positions and / or scaffold modules may be detected at three to six different relative axial positions of the work rolls.
  • one of the pivot positions and / or one of the scaffolding modules are determined at a maximum relative axial displacement of the work rolls as intended.
  • the at least two determined pivot positions and / or scaffolding modules at different relative axial positions of the work rolls can be brought into a functional context and used as a basis for the further calculation.
  • an average value is formed from the at least two determined pivot positions and / or scaffold modules at different relative axial positions of the work rolls and this is used as a basis for the further calculation.
  • the work rolls can in principle have any outer surface, for example a cylindrical outer contour.
  • a spherical or concave outer contour of the work rolls is possible.
  • an asymmetrical work roll contour is present, for example a combined crowned and concave outer contour (CVC rolls) or generally an outer contour which can be described with a polynomial, in particular with a polynomial of at least third order, or with a trigonometric function.
  • the force acting in the framework by means of at least one load cell can be determined.
  • the force acting in a piston-cylinder unit for the radial adjustment of the work roll force can be determined. It is also possible that the determined by means of the load cell and the force acting in the piston-cylinder unit force per frame side are averaged.
  • a further embodiment provides that the calibration takes place upon application of a bending force to the work roll. It can also be provided in training that the calibration is carried out at least two different bending forces on the work roll.
  • the rolling stand is designed as a sexto scaffolding with working, intermediate and support rollers, wherein the calibration process described above for the set of rolls is also carried out for the intermediate rolls.
  • the calibration process takes place in the axially displaced state of the working and intermediate rolls and the pivoting positions are taken up for setting a symmetrical roll gap and / or the framework module.
  • the invention sees u. a. that the calibration process not only in the center position (without relative axial displacement of the work rolls), but also in the shifted state of the work rolls.
  • the contact length between the work rolls is shorter for a given axial displacement of the rolls and may correspond to the back up roll length and thus approach the range.
  • a maximum positive or negative work roll displacement position can be set.
  • As a reference shift position when calibrating any shift position can be set, for. B. the maximum displacement position.
  • a rolling stand 3 which has two cooperating work rolls 1 and 2.
  • the work rolls 1, 2 are supported on support rollers 4 and 5.
  • the work rolls 1, 2 are presently not cylindrical, but they have a crowned rolling surface, which is exaggerated in the figure.
  • the work rolls 1, 2 have a length L A , which is greater than the length L S of the support rollers 4, fifth
  • Fig. 1 is a relative axial position A shown in which there is no relative axial displacement of the work rolls 1, 2 (home position).
  • the effective between the work rolls 1, 2 and thus also in the roll stand 3 force can be detected by load cells 8, 9.
  • the framework 3 or the work rolls 1, 2 are calibrated.
  • the elongation of the roll stand 3 is determined under a radial force acting between the work rolls 1, 2, ie the so-called framework module M is determined.
  • the roll gap is set symmetrically (wedge-free) relative to the center of the frame.
  • the scaffold module M thus determined is then used by calculation during the subsequent rolling of the rolling stock during the setting or adjustment of the work rolls. This is well known as such.
  • the determination of the pivot position for setting the symmetrical roll gap or the determination of the scaffold module M is at least twice, namely first in a first relative axial position A of the work rolls 1, 2, as it Fig. 1 shows.
  • the pivot position for adjusting the symmetrical roll gap and / or the framework module M is determined at least once more, namely in a second relative axial position B of the work rolls 1, 2, as it Fig. 2 shows.
  • the work rolls 1, 2 are here displaced in the axial direction a, in each case by a distance SPOS of a few millimeters.
  • the two determined values for the swivel position and / or the scaffold module M are stored and used for the further calculation of the employment of the work rolls 1,2 during rolling of the rolling stock.
  • the scaffold modules are at the two relative axial positions A ( Fig. 1 ) and B ( Fig. 2 ) differently. From the geometrical conditions can be based on the two determined scaffolding modules M and the employment correction value K be calculated for rolling. The pitch correction values are also different for the two positions A and B.
  • the calibration process in several (here: five) different displacement positions is performed and the expansion curve is stored as a function of the shift position and based on the further calculation.
  • more accurate correction values K of the setting position for the thickness control and for the framework module M as a function of the work roll displacement result.
  • a mathematical model simulates the geometric changes and changes in the load distribution in the nip and between the working and support rollers and the associated strain changes from the calibration state and compares them with the measured values.
  • the calculation model is adapted, which increases the placement accuracy.
  • the calibration state is converted to the respectively current displacement position and bandwidth during the rolling process. The thickness control thus takes into account these effects and thus sets a more accurate thickness.
  • the work rolls preferably used in the present process have no cylindrical outer contour, but there are preferably so-called. CVC rollers or even those which can be described by a trigonometric function. So these are asymmetrically profiled work rolls.
  • load load cells or the cylinder forces are used as a reference force.
  • the average of load load can force and cylinder force can be formed for each side and used in the calibration process.
  • the work roll bending force from the balancing force to z. B. raised the maximum bending force.
  • the effect of the work roll bending on the stretching behavior or the zero point it is provided as a further alternative or supplement to carry out the calibration process in each case for two different bending force levels.
  • the results are used for the correction or automatic adaptation of the frame stretching models and the influence of the work roll bending under current boundary conditions (eg diameter, roll grinding) is described in more detail.
  • the calibration process is thus performed so that the calibration (also) takes place so that the contact length of the work rolls is reduced to each other, in particular so that the contact length of the work rolls about the support roller length corresponds.
  • the calibration is thus carried out, for example, so that the work rolls are driven only to an axial displacement value (preferably to the maximum positive displacement position).
  • This shift position during calibration is stored as a reference position.
  • the thickness control compensates for these effects and adjusts the exact thickness.

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

Claims (19)

  1. Procédé pour l'étalonnage d'une cage de laminoir (3), dans lequel, pour la détermination de la position de pivotement relative du groupe de cylindres à des fins de réglage d'un espace libre symétrique entre les cylindres et/ou pour la détermination de l'extension de la cage de laminoir (3) avant le processus de laminage proprement dit, le groupe de cylindres est soumis à une compression réciproque dans le cadre d'une force radiale prédéfinie et la déformation de la cage de laminoir que l'on obtient est mesurée de préférence sur l'unité du type à piston-cylindre (6, 7), la position de pivotement du groupe de cylindres que l'on établit de cette manière et/ou le module de cage M que l'on établit de cette manière sont utilisés sous la forme d'un calcul lors du laminage ultérieur d'un produit à laminer entre les cylindres de travail (1, 2) lors de la mise en marche du groupe de cylindres, caractérisé en ce que les cylindres de travail (1, 2) peuvent être soumis à un déplacement axial l'un par rapport à l'autre à partir d'une position nulle correspondant à une absence de déplacement en direction axiale, la détermination de la position de pivotement pour le réglage d'un espace libre symétrique entre les cylindres et/ou la détermination du module de cage M ayant lieu dans une position de déplacement relative des cylindres de travail (1, 2) qui n'est pas égale à la position nulle, la position de pivotement déterminée et/ou la valeur pour le module de cage M étant mémorisées et utilisées sous la forme d'un calcul pour le calcul ultérieur de la position de pivotement et/ou de la mise en marche du groupe de cylindres lors du laminage du produit à laminer.
  2. Procédé selon la revendication 1, caractérisé en ce que, à partir de la position de pivotement mémorisée et/ou à partir de la valeur mémorisée pour le module de cage M, on procède à une conversion de la position d'étalonnage pour obtenir la position de déplacement respectivement actuelle.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'on procède au moins à deux reprises à la détermination de la position de pivotement pour le réglage d'un espace libre symétrique entre les cylindres et/ou à la détermination du module de cage M, plus précisément dans une première position axiale relative des cylindres de travail (1, 2) et dans une deuxième position axiale relative des cylindres de travail (1, 2), la première position axiale relative étant différente de la deuxième position axiale relative, et lesdites au moins deux positions de pivotement déterminées et/ou lesdites au moins deux valeurs déterminées pour le module de cage M étant mémorisées et utilisées sous la forme d'un calcul pour le calcul ultérieur de la position de pivotement et/ou de la mise en marche du groupe de cylindres (1, 2) lors du laminage du produit à laminer.
  4. Procédé selon la revendication 3, caractérisé en ce qu'on détermine plus de deux positions de pivotement et/ou plus de deux modules de cage M lors de plus de deux déplacements axiaux relatifs différents des cylindres de travail (1, 2).
  5. Procédé selon la revendication 4, caractérisé en ce qu'on détermine de trois à six positions de pivotement et/ou de trois à six modules de cage M, lors de trois à six déplacements axiaux relatifs différents des cylindres de travail (1, 2).
  6. Procédé selon l'une quelconque des revendications 3 à 5, caractérisé en ce qu'on détermine une des positions de pivotement et/ou un des modules de cage M à un déplacement axial relatif maximal SPOSmin, SPOSmax des cylindres de travail (1, 2) conformément aux dispositions.
  7. Procédé selon l'une quelconque des revendications 3 à 6, caractérisé en ce qu'on met lesdites au moins deux positions de pivotement établies et/ou lesdits au moins deux modules de cage M déterminés à différentes positions axiales relatives des cylindres de travail (1, 2) en relation fonctionnelle et on s'en sert comme base pour le calcul ultérieur.
  8. Procédé selon l'une quelconque des revendications 3 à 7, caractérisé en ce qu'on calcule une valeur moyenne à partir desdites au moins deux positions de pivotement déterminées et/ou à partir desdits au moins deux modules de cage M déterminés, et on s'en sert comme base pour le calcul ultérieur.
  9. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que les cylindres de travail (1, 2) présentent un contour externe de configuration cylindrique.
  10. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que les cylindres de travail (1, 2) présentent un contour externe de configuration sphérique ou concave.
  11. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que les cylindres de travail (1, 2) présentent un contour externe de configuration combinée sphérique et concave.
  12. Procédé selon l'une quelconque des revendications 1 à 8, caractérisé en ce que les cylindres de travail (1, 2) présentent un contour externe qui peut être décrit avec un polynôme, en particulier avec un polynôme au moins du troisième ordre, ou avec une fonction trigonométrique.
  13. Procédé selon l'une quelconque des revendications 1 à 12, caractérisé en ce que, lors de la mesure de la déformation de la cage de laminoir (3), on détermine la force s'exerçant dans la cage de laminoir (3) au moyen d'un dynamomètre (8, 9).
  14. Procédé selon l'une quelconque des revendications 1 à 12, caractérisé en ce que, lors de la mesure de la déformation de la cage de laminoir (3), on détermine la force s'exerçant dans au moins une unité du type à piston-cylindre (6, 7) pour le déplacement radial des cylindres de travail (1, 2).
  15. Procédé selon les revendications 13 et 14, caractérisé en ce qu'on détermine la force déterminée au moyen du dynamomètre (8, 9) et la force s'exerçant dans l'unité du type à piston-cylindre (6, 7), respectivement du côté commande et du côté service.
  16. Procédé selon l'une quelconque des revendications 1 à 15, caractérisé en ce que l'étalonnage a lieu en exerçant une force de flexion sur les cylindres de travail (1, 2).
  17. Procédé selon la revendication 16, caractérisé en ce que l'étalonnage a lieu en exerçant au moins deux forces de flexion différentes sur les cylindres de travail (1, 2).
  18. Procédé selon l'une quelconque des revendications 1 à 17, caractérisé en ce que la cage de laminoir (3) est réalisée sous la forme d'une cage de type sexto comportant des cylindres de travail, des cylindres intermédiaires et des cylindres de support, le processus d'étalonnage selon les revendications 1 à 17 pour les cylindres de travail (1, 2) étant mis en oeuvre également pour les cylindres intermédiaires.
  19. Procédé selon la revendication 18, caractérisé en ce que, dans le cas de cylindres de travail et de cylindres intermédiaires aptes à se déplacer en direction axiale les uns par rapport aux autres, le processus d'étalonnage a lieu à l'état dans lequel les cylindres de travail et les cylindres intermédiaires ont été soumis à un déplacement en direction axiale, et on enregistre les positions de pivotement pour le réglage d'un espace libre symétrique entre les cylindres et/ou pour le module de cage M.
EP09799266.3A 2008-12-18 2009-12-17 Procédé d'étalonnage de deux cylindres de travail coopérant entre eux dans une cage de laminoir Active EP2379243B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102008063514 2008-12-18
DE102009030792A DE102009030792A1 (de) 2008-12-18 2009-06-27 Verfahren zum Kalibrieren zweier zusammenwirkender Arbeitswalzen in einem Walzgerüst
PCT/EP2009/009078 WO2010069575A2 (fr) 2008-12-18 2009-12-17 Procédé d'étalonnage de deux cylindres de travail coopérant entre eux dans une cage de laminoir

Publications (2)

Publication Number Publication Date
EP2379243A2 EP2379243A2 (fr) 2011-10-26
EP2379243B1 true EP2379243B1 (fr) 2014-02-12

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EP09799266.3A Active EP2379243B1 (fr) 2008-12-18 2009-12-17 Procédé d'étalonnage de deux cylindres de travail coopérant entre eux dans une cage de laminoir

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Country Link
US (1) US8939009B2 (fr)
EP (1) EP2379243B1 (fr)
JP (1) JP5679985B2 (fr)
KR (1) KR101299946B1 (fr)
CN (1) CN102256717B (fr)
DE (1) DE102009030792A1 (fr)
RU (1) RU2476280C1 (fr)
UA (1) UA101541C2 (fr)
WO (1) WO2010069575A2 (fr)

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DE102009021414A1 (de) * 2008-12-17 2010-07-01 Sms Siemag Aktiengesellschaft Walzgerüst zum Walzen eines insbesondere metallischen Guts
DE102009030792A1 (de) * 2008-12-18 2010-06-24 Sms Siemag Ag Verfahren zum Kalibrieren zweier zusammenwirkender Arbeitswalzen in einem Walzgerüst
US8505611B2 (en) * 2011-06-10 2013-08-13 Castrip, Llc Twin roll continuous caster

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UA101541C2 (ru) 2013-04-10
DE102009030792A1 (de) 2010-06-24
KR101299946B1 (ko) 2013-08-26
RU2011129595A (ru) 2013-01-27
WO2010069575A2 (fr) 2010-06-24
JP2012512030A (ja) 2012-05-31
JP5679985B2 (ja) 2015-03-04
US20110247391A1 (en) 2011-10-13
US8939009B2 (en) 2015-01-27
CN102256717A (zh) 2011-11-23
WO2010069575A3 (fr) 2010-08-19
KR20110058897A (ko) 2011-06-01
EP2379243A2 (fr) 2011-10-26
RU2476280C1 (ru) 2013-02-27
CN102256717B (zh) 2013-11-06

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