EP1893366B1 - Procede de regulation et/ou de commande d'un segment de cylindre reglable dans un dispositif de coulee continue - Google Patents

Procede de regulation et/ou de commande d'un segment de cylindre reglable dans un dispositif de coulee continue Download PDF

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Publication number
EP1893366B1
EP1893366B1 EP06755230A EP06755230A EP1893366B1 EP 1893366 B1 EP1893366 B1 EP 1893366B1 EP 06755230 A EP06755230 A EP 06755230A EP 06755230 A EP06755230 A EP 06755230A EP 1893366 B1 EP1893366 B1 EP 1893366B1
Authority
EP
European Patent Office
Prior art keywords
curve
segment
determined
curved
exit
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.)
Not-in-force
Application number
EP06755230A
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German (de)
English (en)
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EP1893366A1 (fr
Inventor
Bernhard Weisshaar
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.)
Siemens AG
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Siemens AG
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Publication of EP1893366A1 publication Critical patent/EP1893366A1/fr
Application granted granted Critical
Publication of EP1893366B1 publication Critical patent/EP1893366B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • 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
    • B22D11/128—Accessories for subsequent treating or working cast stock in situ for removing
    • 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
    • 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock
    • B22D11/208—Controlling or regulating processes or operations for removing cast stock for aligning the guide rolls

Definitions

  • the invention relates to a method for controlling and / or controlling an adjustable roller segment in a continuous casting, wherein the roller segment for guiding the strand comprises the following elements: A movable upper frame with at least one upper roller, a subframe with at least one lower roller, a positioning device for relative positioning of the upper frame with respect to the subframe having one or more pitches, wherein an input of the reel segment has an input jaw width and an output an output jaw width.
  • Continuous casting plants are used for continuous casting of square (billets) or rectangular (slabs) cross sections in molds.
  • the strand is fed into slab plants after emerging from the cooled mold to support the strand shell and to achieve a reduction in thickness in roll segments.
  • the segment preferably consists of a movable upper and a fixed subframe, both of which are provided with a plurality of rollers.
  • the upper frame of the segment can be positioned with respect to the subframe via, for example, two hydraulic adjusting devices each near the entrance and the exit within certain limits.
  • the jaw widths between the first top and bottom rolls at the entrance and the last top and bottom rolls at the exit can be set to preset values.
  • the mouth width at the outlet is preferably lower than at the inlet of the roller segment.
  • EP 0 730 924 A1 discloses a method for continuous casting of thin slabs. This Anstellsegmente be used with lower rollers and upper rollers, with a reduction the strand is done by hitting the segments against the strand.
  • the jaw widths in particular with regard to automation, with a faster, but above all, more accurate method than previously possible to calculate.
  • an automation system converts the jaw width (s) into the setting distance (s) or vice versa, by passing one through an on-touch point of an input sub-roll and an off Contact point of an output lower roller leading curved undercurve, and a leading through an upper one-touch point and by an upper Aus-Berlickddling curved upper curve is determined, and the Anstellweiten be calculated via a pitching position of the adjusting device using the curved lower curve and the curved upper curve.
  • the pitches or jaw widths can be calculated with sufficient accuracy.
  • touch points of rollers of the subframe can be defined.
  • contact points on or on rollers of the subframe can be determined at least approximately.
  • the input jaw width is removed from the input touch point and the output jaw width from the output touch point orthogonal to the sub-curve toward the top frame, whereby the top one touch point (the Input top roller) and the top off touch point (the output top roller) are determined.
  • the top one touch point the Input top roller
  • the top off touch point the output top roller
  • the on and off touch points are not necessarily the geometric points of contact (a tangent). Rather, it is points that define the jaw widths - at least for practical applications with sufficient accuracy. This is especially true for the upper points of contact.
  • an advantageous extension is that in each case an arc equation is used for the calculation of the curves of the curved segment type, in particular of the uniformly curved segment type.
  • a Circular arc equation can be determined for the uniformly curved segment types in a very advantageous manner, the lower curve and the upper curve, which exactly match the points of contact of the roller segment.
  • the subcurve is determined by means of a sum of circular arc pieces, in particular by means of a sum of circle equations, and the upper curve by means of a circular arc approximation equation.
  • the sub-curve is determined by means of an envelope, in particular by means of a sum of circle equations with center coordinates, radius and angle, preferably by means of value pairs of the circle equations.
  • a radius is determined for the circular-arc approximation equation, which is an average of the sum of the radii of the circle equations of the lower curve, in particular of the envelope curve.
  • the required accuracy is achieved by determining a correction value as a difference between an undercurve shifted with respect to the lower rollers tangent to the lower rollers and the upper curve, in particular a circular arc approximation curve.
  • the embodiment described above has the particular advantage that, despite approximation methods and the determination of correction values, a possible calculation error is compensated.
  • the setting is determined using the correction value at the Anstellpositionen.
  • a coordinate origin of a coordinate system is in each case placed in the middle of a projection line, which is produced by projecting the lower curve, preferably a pass line, onto the abscissa.
  • the choice of a coordinate system and the determination of a coordinate origin simplify the aforementioned calculation methods by a further.
  • the sub-curve is located at a point in the origin of coordinates.
  • the origin of the coordinates is preferably in the middle of the roller segment or the lower curve lies at least with the center of the fitting line in the origin of the coordinates.
  • the invention also includes a computer program product comprising program code means suitable for performing all the steps of a method according to any one of the preceding claims when the computer program product is executed on a data processing system or automation system.
  • a machine-readable program code on a data carrier for example a CD or a memory stick
  • data processing systems can advantageously be adapted to a calculation module for the set-up widths, jaw widths, for a setpoint calculation and / or actual value calculation.
  • FIG. 1 schematically shows a roller segment 1 with an upper frame 4 and a lower frame 5.
  • a strand 3 is passed through the roller segment 1.
  • Via an input EN with a jaw width 10 the strand is guided in the casting direction to an exit EX with a jaw opening 11.
  • Decisive for the insertion of a strand and the discharge of a strand is in each case a pair of rollers.
  • these are an input sub-roller 22 and an input top roller 32, and for the output, the roller pair consists of an output sub-roller 24 and an output top roller 34.
  • FIG. 2 shows highly schematically a roller segment 1 in a plan view.
  • two adjusting devices 12 and 13 or 14 and 15 are present at the entrance EN and at the exit EX.
  • An Anstellvoriquess pair thus form the Anstellvortechnischen 12 and 13 at the entrance.
  • Another Anstellvoriquess pair form the adjusting devices 14 and 15 at the output of the roller segment. 1
  • FIG. 3 also shows very schematically a segment type with adjusting devices in an inclined position.
  • the skew is a few mm to about the base length.
  • the upper frame 4 is with respect to the sub-frame 5 in one Slope positioned to him.
  • the adjusting devices 12, 13, 14 and 15 are adjusted by means of hydraulic cylinders.
  • the input EN is positioned higher relative to the output EX via an adjustment width 20 with respect to an adjustment range 21, so that the upper frame 4 is set in the required inclined position. For additional stability of the upper frame 4 is guided over Gleitstoffkappen 50.
  • FIG. 4 shows the conversion of throat widths 10, 11 in Anstellweiten 20, 21 of a straight segment type.
  • a straight line equation with the midpoint of an undercurve 26 or a pass line is placed in the coordinate origin.
  • An on-touch point which results from the contact of the input sub-roll 22 with the strand 3
  • an out-touch point ex which is formed by the contact of an output sub-roll 24 with the strand 3
  • the straight-line equation thus describes the sub-curve 26, with reference to the sub-curve 26, the points of contact of the input and output sub-rollers 22, 24 or generally of the sub-rollers 7 of the sub-frame 5 can be described become.
  • the points on or ox result.
  • the point on is approximately the upper one-touch point of an input top roller 32 with the strand 3.
  • the top off-touch point ox is approximately the point of contact between an output top roller 34 and the strand 3.
  • ox is an upper curve 28 defined by means of a straight line equation.
  • FIG. 5 shows the calculation for a uniformly curved segment type.
  • a circular arc equation is used to simulate the contact points en and ex, which arise in each case by the contact of the input lower roller 22 with the strand 3 or the output lower roller 24 with the strand 3.
  • the lower curve 26 forms the arcuate registration line of the lower rollers of a curved segment type.
  • the pass line touches the coordinate origin in the coordinate system 27 in the middle of the segment.
  • the upper input Touch point on or the upper off-touch point ox with the input top roller 32 and the output top roller 34 determines.
  • FIG. 6 shows the definition of the roll layers in the non-uniformly curved segment type.
  • the sub-curve 26 or the envelope The roles of sub-frame or the pass line is composed of each of the n rollers of individual circular arc pieces of different radii R i .
  • the center coordinates X i , Y i , the radii R i and the angular position ⁇ i of each circular arc piece are given in a system fixed coordinate system or in a segment-related coordinate system.
  • a conversion from a system fixed coordinate system in a segment-related coordinate system can be made due to a known installation position of the segment in a strand transport machine.
  • the shifted lower curve 26 ' is also shifted in the non-uniformly curved segment type to the lower curve 26, that a basic position of the segment is shown.
  • FIG. 7 illustrates a determination of correction values ⁇ Y en, ⁇ Y ex in determining an envelope for the upper frame 4 with an approximate method.
  • the errors or correction values ⁇ Y en and ⁇ Y ex are calculated, which result from the deviation between the sub-curve 26 'shifted into points on and ox to a circular-arc approximation curve 29 result.
  • FIG. 8 shows a segment-related coordinate system for the non-uniformly curved segment type.
  • Calibration to a nominal setting position in the basic position is easily possible by setting a nominal jaw width.
  • the nominal jaw width is preferably set by a force-controlled approach to corresponding calibration pieces between the upper and lower entry and exit rollers.
  • the calculation algorithms for the straight and circular segment type are very accurate, i. they are limited only by the numerical accuracy of an automation system.
  • the calculation algorithm for the non-uniformly curved segment type has an accuracy of less than 0.01 mm with a required control accuracy of about 0.1 mm, which means that even with an approximate calculation, the method is 10 times more accurate than required ,

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Paper (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Claims (12)

  1. Procédé de régulation et/ou de commande d'un segment ( 1 ) de cylindre courbé et réglable dans une installation de coulée continue, le segment ( 1 ) de cylindre ayant, pour guider la barre ( 3 ), les éléments suivants :
    - un bâti ( 4 ) supérieur mobile ayant au moins un cylindre supérieur,
    - un bâti ( 5 ) inférieur ayant au moins un cylindre inférieur,
    - un dispositif ( 12, 13, 14, 15 ) de serrage pour mettre en position relative le bâti ( 4 ) supérieur par rapport au bâti inférieur ayant une ou plusieurs largeurs ( 20, 21 ) de serrage,
    - dans lequel une entrée ( EN ) du segment ( 1 ) du cylindre a une largeur ( 10 ) d'embouchure d'entrée et une sortie ( EX ) a une largeur ( 11 ) d'embouchure de sortie,
    caractérisé en ce que
    pour la régulation ou pour la commande du segment ( 1 ) de cylindre courbé, un système d'automatisation transforme par le calcul la ou les largeurs ( 10, 11 ) d'embouchure en la ou les largeurs ( 20, 21 ) de serrage ou inversement, en déterminant une courbe ( 26 ) inférieure courbée, passant par un point ( en ) de contact d'entrée d'un cylindre ( 22 ) inférieur d'entrée et par un point ( ex ) de contact de sortie d'un cylindre ( 24 ) inférieur de sortie, et une courbe ( 28 ) supérieure courbée, passant par un point ( on ) de contact d'entrée supérieur et par un point ( ox ) de contact de sortie supérieur et les largeurs ( 20, 21 ) de serrage sont calculées sur une position ( -xA, +xA ) de serrage du dispositif ( 12, 13, 14, 15 ) de serrage à l'aide de la courbe ( 26 ) inférieure courbée et de la courbe ( 28 ) supérieure courbée.
  2. Procédé suivant la revendication 1,
    caractérisé en ce que l'on porte la largeur ( 10 ) d'embouchure d'entrée du point ( en ) de contact d'entrée et la largeur ( 11 ) d'embouchure de sortie du point ( ex ) de contact de sortie orthogonalement à la courbe ( 26 ) inférieure en direction du bâti ( 4 ) supérieur, en déterminant ainsi le point ( on ) de contact d'entrée supérieur et le point ( ox ) de contact de sortie supérieur.
  3. Procédé suivant l'une des revendications 1 à 2,
    caractérisé en ce que l'on détermine les largeurs ( 20, 21 ) de serrage pour au moins l'un des types de segment de cylindre suivants :
    a) un type de segment courbé uniformément et/ou
    b) un type de segment courbé d'une manière qui n'est pas uniforme.
  4. Procédé suivant la revendication 3,
    caractérisé en ce que, pour le calcul des courbes ( 26, 28 ) du type de segment courbé uniformément, on utilise une équation d'arc de cercle.
  5. Procédé suivant la revendication 3,
    caractérisé en ce que, pour le type de segment courbé d'une manière qui n'est pas uniforme, on détermine la courbe ( 26 ) inférieure au moyen d'une somme d'arcs de cercle et on détermine la courbe ( 28 ) supérieure au moyen d'une équation d'approximation d'arc de cercle.
  6. Procédé suivant la revendication 5,
    caractérisé en ce que l'on détermine la courbe ( 26 ) inférieure au moyen d'une courbe d'enveloppe.
  7. Procédé suivant la revendication 5 ou 6,
    caractérisé en ce que, pour l'équation d'approximation d'arc de cercle, on détermine un rayon ( RM ) qui est une valeur moyenne de la somme des rayons ( Ri ) des équations de cercle pour la courbe ( 26 ) inférieure.
  8. Procédé suivant l'une des revendications 5 à 7,
    caractérisé en ce qu'aux positions ( -XA, +XA ) de serrage, on détermine une valeur ( ΔYen, ΔYex ) de correction en tant que différence entre la courbe ( 28 ) supérieure et une courbe ( 26' ) inférieure décalée par rapport à la courbe ( 26 ) inférieure tangente aux cylindres ( 22, 24 ) inférieurs.
  9. Procédé suivant la revendications 8,
    caractérisé en ce qu'aux positions ( -XA, +XA ) de serrage, on détermine des largeurs ( 20, 21 ) de serrage à l'aide de la valeur ( ΔYen, ΔYex ) de correction.
  10. Procédé suivant l'une des revendications 1 à 9,
    caractérisé en ce que l'on met une origine des cordonnées d'un système ( 27 ) de coordonnées respectivement au milieu d'une ligne de projection, qui est obtenue par la projection de la courbe ( 26 ) inférieure sur les abscisses.
  11. Procédé suivant la revendication 10,
    caractérisé en ce que la courbe ( 26 ) inférieure a un point à l'origine des coordonnées.
  12. Produit de programme informatique, comprenant des moyens de code de programme propres à effectuer tous les stades d'un procédé suivant l'une des revendications ci-dessus, lorsque le produit de programme informatique est réalisé sur un système informatique ou sur un système d'automatisation.
EP06755230A 2005-06-20 2006-05-17 Procede de regulation et/ou de commande d'un segment de cylindre reglable dans un dispositif de coulee continue Not-in-force EP1893366B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005028711A DE102005028711A1 (de) 2005-06-20 2005-06-20 Verfahren zur Regelung und/oder Steuerung eines verstellbaren Rollensegmentes in einer Stranggießanlage
PCT/EP2006/062372 WO2006136483A1 (fr) 2005-06-20 2006-05-17 Procede de regulation et/ou de commande d'un segment de cylindre reglable dans un dispositif de coulee continue

Publications (2)

Publication Number Publication Date
EP1893366A1 EP1893366A1 (fr) 2008-03-05
EP1893366B1 true EP1893366B1 (fr) 2010-03-03

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EP06755230A Not-in-force EP1893366B1 (fr) 2005-06-20 2006-05-17 Procede de regulation et/ou de commande d'un segment de cylindre reglable dans un dispositif de coulee continue

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Country Link
EP (1) EP1893366B1 (fr)
CN (1) CN101267903B (fr)
AT (1) ATE459443T1 (fr)
DE (2) DE102005028711A1 (fr)
WO (1) WO2006136483A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008007247A1 (de) * 2007-09-13 2009-03-19 Siemens Aktiengesellschaft Betriebsverfahren für eine Walzstraße mit Krümmungserkennung
AT506976B1 (de) * 2008-05-21 2012-10-15 Siemens Vai Metals Tech Gmbh Verfahren zum stranggiessen eines metallstrangs
CN103273032B (zh) * 2013-06-24 2016-06-22 济钢集团有限公司 一种宽厚板连铸机轻压下扇形段开口度在线校验方法
CN114789242A (zh) * 2021-01-25 2022-07-26 宝山钢铁股份有限公司 一种连铸机弯曲段耳轴在线调整方法
CN113927006B (zh) * 2021-10-13 2023-05-16 大连华锐重工集团股份有限公司 一种四合一活动扇形段对中调弧装置

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE464465B (sv) * 1986-06-27 1991-04-29 Oerjan Axelsson Foerfarande och anordning foer maetning och registrering av en straengstyrnings rullavstaand och geometri i en straenggjutningsmaskin
CN1055423C (zh) * 1993-09-08 2000-08-16 鞍山钢铁公司 连铸机整体更换段的快速接弧方法及装置
JP3008821B2 (ja) * 1994-07-29 2000-02-14 住友金属工業株式会社 薄鋳片の連続鋳造方法および装置
DE19627336C1 (de) * 1996-06-28 1997-09-18 Mannesmann Ag Verfahren zum Führen eines Stranges und Strangführung
DE19809807C2 (de) * 1998-03-09 2003-03-27 Sms Demag Ag Anstellverfahren für ein Rollensegment einer Stranggießanlage
DE10011689A1 (de) * 2000-03-10 2001-09-13 Sms Demag Ag Verfahren zum Stranggiessen von Brammen und insbesondere von Dünnbrammen
DE10106252A1 (de) * 2001-02-10 2002-08-14 Sms Demag Ag Strangführung einer Stranggiessanlage sowie Anstellverfahren für deren Rollensegmente
DE10141128A1 (de) * 2001-06-01 2002-12-05 Sms Demag Ag Verfahren zum Einstellen der dynamischen Soft Reduction an Stranggießmaschinen
DE10204064A1 (de) * 2001-12-18 2003-07-03 Sms Demag Ag Maulweitenregelung an Segmenten für Stranggießanlagen
DE10326904A1 (de) * 2003-06-14 2004-12-30 Sms Demag Ag Verfahren und Stranggießmaschine zum Grundeinstellen und Kontrollieren der Rollenspalte von Rollensegmenten oder Treiberrollenpaaren

Also Published As

Publication number Publication date
ATE459443T1 (de) 2010-03-15
WO2006136483A1 (fr) 2006-12-28
DE102005028711A1 (de) 2006-12-28
DE502006006340D1 (de) 2010-04-15
CN101267903A (zh) 2008-09-17
EP1893366A1 (fr) 2008-03-05
CN101267903B (zh) 2011-01-26

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