EP1412111B1 - Procede pour ajuster la reduction douce dynamique dans des machines de coulee continue - Google Patents

Procede pour ajuster la reduction douce dynamique dans des machines de coulee continue Download PDF

Info

Publication number
EP1412111B1
EP1412111B1 EP02750980A EP02750980A EP1412111B1 EP 1412111 B1 EP1412111 B1 EP 1412111B1 EP 02750980 A EP02750980 A EP 02750980A EP 02750980 A EP02750980 A EP 02750980A EP 1412111 B1 EP1412111 B1 EP 1412111B1
Authority
EP
European Patent Office
Prior art keywords
segment
casting
segments
soft reduction
billet
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.)
Expired - Lifetime
Application number
EP02750980A
Other languages
German (de)
English (en)
Other versions
EP1412111A2 (fr
Inventor
Udo Falkenreck
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 Siemag AG
Original Assignee
SMS Demag AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE10141128A external-priority patent/DE10141128A1/de
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1412111A2 publication Critical patent/EP1412111A2/fr
Application granted granted Critical
Publication of EP1412111B1 publication Critical patent/EP1412111B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • B22D11/16—Controlling or regulating processes or operations
    • 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

Definitions

  • the invention relates to a method for adjusting the dynamic soft reduction on continuous casting plants, in particular in the continuous casting of slabs.
  • a probate countermeasure is the employment of strand guide segments below the mold at a certain rate to grow on each other Unite strand bowls together. This procedure designates one as a soft reduction.
  • the end of a segment is determined by the position of the tangent point of the determined last roles of the segment; consequently, it is immediately behind this Roll pair also the beginning of the next segment scheduled.
  • the skewing (tap adjustment) of the segment upper frame is called conicity the continuous casting machine (CCM).
  • CCM conicity the continuous casting machine
  • This consists of two Sizes together: the thermal conicity based on the shrinkage of the Casting by cooling and solidification, as well as the Soft Reduction Share, which is set separately. The latter may, if not expressly otherwise required, also take the size "0".
  • the segments are 0 to 7, taking into account the thermal taper clamped on a stop and the segments 8 to 14 (Cyberlink) become the CCM depending on the mode driven to a certain preselected distance, taking into account the Max. Forces that can be initiated in the segment.
  • the adjustment strategy for setting up the new boundary conditions is in the following sections.
  • TTSR thermal tracking calculation
  • Liquid Fraction is generated via the material data records of the TTSR. certainly.
  • the Liquid Fraction designates in the liquid swamp of the strand the proportion between liquid and already solidified crystals.
  • the value of this Metric is between 0 and 1, where 0 is the location of the full Solidus describes and 1 the position of the liquidus temperature in the Strand.
  • the "Thermal Taper" for the casting machine can be over the same mask configure.
  • the input is from six different segment positions (Quotas with liquid fraction fraction) are provided to influence the sump tip.
  • the TTSR value for the Liquid Fraction calculated from this information the intersection of the liquid fraction with the notional midline of the strand. This value is measured from the pouring level in the mold in Direction to the cutting machine. From this parameter can then the corresponding strand segment can be determined that with the given Quota is charged.
  • TTSR seeks from the point of complete Solidification from backwards towards the mold after the first intersection with the imaginary centerline and determines the segment number. Then the search algorithm jumps to the next segment (Solidus -1) and again determines the first there Liquid Fraction Intersection. This continues until the end.
  • the associated segment employment rates are set in analogy.
  • the TTSR calculation is triggered in a short rhythm of, for example, 10 s, so that then the current calculation is output again.
  • the Level 2 accessible data from the Pattem or from their changes are converted to a telegram to the level 1, in which the current Quotas for employment of segmental frames are reported.
  • the maximum permissible change in the quota per cycle was limited to 0.2 mm / m.
  • Level 1 informs you about the current one every 5 seconds Position of the jaw width of the segment output.
  • TTSR in level 2 a "CaDesign” an image for the calculation of Casting machine created, sets level 1 on the information of the mouth width of the exit dimension of the segment 7.
  • the segments in the horizontal part of the casting machine are hydraulically to a predetermined Measure adjustable. After setting the quotas, the mouth widths approached by changing the position of the upper frame. The default the odds are made by the Level 2 Automation, while the repositioning the mouth width is regulated by Level 1.
  • the control of the segment thus operates in an operating window, the is determined by the minimum and maximum force, and takes care of all Circumstances that the upper frame with the appropriate force on the Losseite the slab rests.
  • the segment After the head has passed, the segment lowers again.
  • the upcoming one Force corresponds to the hot rod pressure.
  • the sump tip Calculated in the appropriate segment can also be the Soft Reduction driving style be activated after checking the plausibility by level 1.
  • the segment 8 becomes Gradually lowered to the specified soft reduction position.
  • TTSR must decide on the basis of the comparison with the Liquid Fraction calculation, whether only one segment is needed for the soft reduction strategy, or a second is charged to the Soft Reduction Quote.
  • the jaw width of the segment exit becomes j-m adapted according to the Soft Reduction Taper.
  • those between j and the caster end are also Segments on the new slab thickness taking into account the thermal Adapted to Tapers.
  • TTSR calculates first the change in the sump tip and leaves the segment frame so switch long until either the sump tip has run back into the segment 7 is or the Ausziehmaschine stopped for the flying distributor change Has.
  • TTSR When the pouring end is initiated, TTSR first calculates the change in the sump tip and keeps the segment frames shifting until either the sump tip has returned to segment 7 or if the extraction machine is stopped for slagging. After definition, the state that has now been reached is frozen.
  • the Soft Reduction driving style is then turned off when the Level 1 system is on gives the command to raise the segment upper frame.
  • the above-described method for setting the dynamic soft reduction is not only applicable to conventional slabs, but also to so-called thin slabs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Claims (6)

  1. Procédé d'ajustage de la réduction douce dynamique dans des installations de coulée continue, notamment lors de la coulée continue de brames,
    caractérisé en ce que
    la position de la pointe du puits liquide ainsi que les composants solide et liquide de la barre coulée sont calculés et qu'un ou plusieurs segments du corset de guidage sont déplacés en fonction des changements de position de la pointe du puits liquide.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    pour calculer la position du puits liquide, on utilise un modèle de calcul thermodynamique pour définir les profils de température dans la barre pendant la coulée.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que
    dans le modèle de calcul, on prend en compte des paramètres de coulée substantiels comme
    la vitesse de coulée Vc
    la quantité d'eau de refroidissement
    la variété d'acier
    l'épaisseur de la barre dans la machine de coulée
    la capacité thermique de la lingotière
    le plan des rouleaux du corset de guidage ou similaire.
  4. Procédé selon l'une quelconque ou plusieurs des revendications 1 à 3,
    caractérisé en ce que
    en cas de modification de l'appui de la pointe du puits liquide en direction de la dernière paire de rouleaux de la machine de coulée, le positionnement des segments est modifié si la nouvelle position est avancée d'une distance □ 10 cm et, dans le cas inverse, l'ajustement des segments est activé lorsque la pointe du puits liquide calculée s'est rétractée de □ 40 cm.
  5. Procédé selon l'une quelconque ou plusieurs des revendications précédentes,
    caractérisé en ce que
    la position de la pointe du puits liquide est calculée lors de cycles prédéfinis au moyen du modèle de calcul thermodynamique.
  6. Procédé selon la revendication 5,
    caractérisé en ce que
    la modification du positionnement des segments est limitée par cycle à une valeur par défaut.
EP02750980A 2001-06-01 2002-05-25 Procede pour ajuster la reduction douce dynamique dans des machines de coulee continue Expired - Lifetime EP1412111B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10126956 2001-06-01
DE10126956 2001-06-01
DE10141128 2001-08-22
DE10141128A DE10141128A1 (de) 2001-06-01 2001-08-22 Verfahren zum Einstellen der dynamischen Soft Reduction an Stranggießmaschinen
PCT/EP2002/005768 WO2002098587A2 (fr) 2001-06-01 2002-05-25 Procede pour ajuster la reduction douce dynamique dans des machines de coulee continue

Publications (2)

Publication Number Publication Date
EP1412111A2 EP1412111A2 (fr) 2004-04-28
EP1412111B1 true EP1412111B1 (fr) 2004-12-01

Family

ID=26009459

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02750980A Expired - Lifetime EP1412111B1 (fr) 2001-06-01 2002-05-25 Procede pour ajuster la reduction douce dynamique dans des machines de coulee continue

Country Status (4)

Country Link
EP (1) EP1412111B1 (fr)
AT (1) ATE283742T1 (fr)
AU (1) AU2002344361A1 (fr)
WO (1) WO2002098587A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2564192C1 (ru) * 2014-04-02 2015-09-27 Открытое акционерное общество "Уральский завод тяжелого машиностроения" Способ мягкого обжатия непрерывнолитой заготовки
EP2788133B1 (fr) 2011-12-05 2016-02-03 Primetals Technologies Austria GmbH Mesures d'amélioration du processus dans une machine de coulée continue au démarrage de la coulée, à la fin de la coulée et lors de la production d'un élément de jonction

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7121323B2 (en) 2002-02-22 2006-10-17 Sms Demag Ag Method and device for the continuous casting and direct shaping of a metal strand, in particular a steel cast strand
DE102005030837B4 (de) * 2005-07-01 2024-04-04 Sms Group Gmbh Verfahren und Stranggießvorrichtung zum Verformen eines gießwarmen Stranges aus Metall, insbesondere aus Stahl oder Stahlwerkstoffen
DE102005055530A1 (de) † 2005-11-22 2007-05-24 Sms Demag Ag Verfahren und Vorrichtung zum Anstellen von mindestens einem Rollensegment einer Strangführungseinrichtung an einen Strang

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5160633A (en) * 1974-11-25 1976-05-26 Nippon Kokan Kk Haganeno renzokuchuzoho
JPS57139458A (en) * 1981-02-20 1982-08-28 Nippon Steel Corp Controlling method for perfect solidification position of ingot in continuous casting
DE19931331A1 (de) * 1999-07-07 2001-01-18 Siemens Ag Verfahren und Einrichtung zum Herstellen eines Stranges aus Metall
DE10045250A1 (de) * 2000-09-13 2002-03-21 Sms Demag Ag Verfahren und Einrichtung zum Bestimmen der Lage der Enderstarrung im Gießstrang beim Stranggießen von Metallen, insbesondere von Stahl

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2788133B1 (fr) 2011-12-05 2016-02-03 Primetals Technologies Austria GmbH Mesures d'amélioration du processus dans une machine de coulée continue au démarrage de la coulée, à la fin de la coulée et lors de la production d'un élément de jonction
RU2564192C1 (ru) * 2014-04-02 2015-09-27 Открытое акционерное общество "Уральский завод тяжелого машиностроения" Способ мягкого обжатия непрерывнолитой заготовки

Also Published As

Publication number Publication date
EP1412111A2 (fr) 2004-04-28
WO2002098587A3 (fr) 2004-02-19
ATE283742T1 (de) 2004-12-15
AU2002344361A1 (en) 2002-12-16
WO2002098587A2 (fr) 2002-12-12

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