EP1369192B1 - Procédé pour déterminer la position du point de solidification finale d'une coulée continue en appliquant une oscillation - Google Patents

Procédé pour déterminer la position du point de solidification finale d'une coulée continue en appliquant une oscillation Download PDF

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Publication number
EP1369192B1
EP1369192B1 EP03005763A EP03005763A EP1369192B1 EP 1369192 B1 EP1369192 B1 EP 1369192B1 EP 03005763 A EP03005763 A EP 03005763A EP 03005763 A EP03005763 A EP 03005763A EP 1369192 B1 EP1369192 B1 EP 1369192B1
Authority
EP
European Patent Office
Prior art keywords
oscillation
roller frame
continuous casting
charactensed
strand
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
EP03005763A
Other languages
German (de)
English (en)
Other versions
EP1369192A1 (fr
Inventor
Wolfram Jung
Ingo Dr. Schubert
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
Application filed by SMS Demag AG filed Critical SMS Demag AG
Publication of EP1369192A1 publication Critical patent/EP1369192A1/fr
Application granted granted Critical
Publication of EP1369192B1 publication Critical patent/EP1369192B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22D11/16—Controlling or regulating processes or operations
    • B22D11/20—Controlling or regulating processes or operations for removing cast stock

Definitions

  • the invention relates to a Method for determining the sump tip in the interior of a cast strand its exit from the mold with a core of liquid metal bypassing Strand shell, which as a result of increasing heat release with increasing Thickness reaches to the solidus point of the marsh tip, and then one solidified continuous casting product, in particular a continuous casting slab formed.
  • the result for the casting operation is the requirement to determine as exactly as possible at which point within a slab the swamp tip lies or where the Position of incipient solidification is located.
  • the course of the force has in a second approximation the Form of a hysteresis, wherein the propagation of the force, relative to an associated Jaw width as a measure of the viscosity of the liquid in the slab Sumpfes, and depending on the determined viscosity conclusions on the Position of the sump tip to be pulled, as well as adjusted the Maulweitenver too becomes.
  • the document EP 0 350 431 B1 describes a method for continuous casting of Slabs with a reduced compared to the cast state thickness, wherein a partially solidified strand between pairs of rollers, driven by means Rolls withdrawn and individual roles against the strand acting deformable are adjustable.
  • a partially solidified strand between pairs of rollers, driven by means Rolls withdrawn and individual roles against the strand acting deformable are adjustable.
  • the speed, the current consumption of the driven Rolls and their contact pressure detected and each supplied to a controller.
  • the Speed of individual driven rollers determining controller is about a parent Regulator adjustable so that by at least one, against stops adjustable, determining the thickness of the strand, on an already solidified Part of the strand deforming acting pair of rollers deform the final dimension and the withdrawal speed of the strand is determined.
  • Upstream or downstream Roles are reflected in the speed and power consumption of their drives depending on the shape change of the strand produced by the rollers adjusted from the measured values current consumption, reaction force of Stranges and the roller clearance determines the location of the sump top and the contact pressures the rollers are adjusted so that the sump tip before at least an adjustable against attacks on a predeterminable distance Role pair lies.
  • the document DE-OS 25 30 032 discloses a method and an apparatus for Determination of acting on a continuous casting during its solidification Forces in which the cast body emerges from a mold and between passes through several pairs of rolls and in a plane at a distance below the Mold freezes over its entire cross-section.
  • the level of complete solidification is detected by measuring on a plurality of roller pairs Compressive forces and comparing the measured values on different pairs of rolls for Determination of that pair of rollers determined, beyond which no further
  • the document DE-OS 34 23 977 A1 describes a method for non-contact Measurement of the solidified surface layer of a casting of metal with non-solidified Inner core.
  • An alternating magnetic field is applied to the casting, whereby the strength of the eddy currents generated in the casting by a measuring coil means is measured without contact.
  • the thickness of a solidified surface layer is determined by the strength of the eddy currents according to the difference of the specific electrical resistance between a non-solidified molten Part and a solidified part of the casting intended.
  • Document JP 11083814 A describes a method for determining the state of solidification a casting. It then exists, one with electromagnetic Supersonic acting on a casting element in cooperation with a to provide the supersonic signal receiving switching system, which the Intensity of the propagating ultrasonic waves recorded, evaluated and with each other compares.
  • the document JP 63174770 describes another method for determining the not solidified end of a cast strand.
  • a variety of roles are at horizontal area of a continuous casting plant and provided with a number of Pressure sensors in the axial direction of the surfaces provided by these rollers.
  • the lateral pressure in the strand through in the Roller detects existing sensors.
  • the position and shape of the not solidified part found in the casting.
  • the invention has the object underlying to show a method by which the mechanical or dynamic Properties of a forced oscillatory moving system measured and for direct determination of the system status of a cast strand be used to determine the location of the swamp tip exactly.
  • the invention takes advantage of the fact that the mechanical or dynamic Properties of a cast slab depending on its Consistency, e.g. As solid or liquid or mixtures, at the distance of Change the mold outlet to the bottom.
  • the position of the sump tip can be derived from the phase angle ( ⁇ ).
  • the coordinate system shows that at maximum reactive power P B , where the angle of P S approaches 90 °, the active power P W decreases towards zero, whereas with a tendency to decrease the reactive power P B towards zero, the active power P W approaches a maximum tends.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Claims (7)

  1. Procédé de détermination du point de solidification finale à l'intérieur d'une barre de coulée continue, après sa sortie de la lingotière avec une croûte solidifiée entourant un noyau de métal liquide qui, suite à une émission croissante de chaleur au fur et à mesure que l'épaisseur augmente, va jusqu'au point de solidification finale du cône liquide et constitue ensuite un produit de coulée continue solidifié à l'intérieur, notamment un brame de coulée continue,
    caractérisé en ce que
    à l'aide d'une cage à rouleaux, on impose une oscillation à l'installation de coulée continue et 'on décompose alors la puissance ou le travail mécanique appliqué, dans un système de coordonnées, de manière proportionnée, en une puissance ou un travail apparent (PS), efficace (PW) ou réactif (PB) et qu'on détermine le point de solidification finale à partir d'un angle de phase (ϕ) pouvant en être déduit du système de coordonnées en fonction de ces composantes.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    une fréquence d'oscillation allant de 0,5 à 10 Hz et de préférence de 1 à 4 Hz est établie.
  3. Procédé selon la revendication 1,
    caractérisé en ce que
    une amplitude d'oscillation allant de 0,1 à 1 mm et de préférence de 0,2 à 0,4 mm est établie.
  4. Procédé selon la revendication 1,
    caractérisé en ce que
    la fréquence d'oscillation et/ou l'amplitude d'oscillation sont modifiées pendant la mesure
  5. Procédé selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce que
    l'ensemble du cadre supérieur à corset de la cage à rouleaux est mis en oscillation.
  6. Procédé selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que
    l'entrée de corset ou la sortie de corset de la cage à rouleaux est mise en oscillation.
  7. Procédé selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce que
    l'énergie d'oscillation est conduite directement dans les corsets correspondants de la cage à rouleaux par exemple par leurs vérins hydrauliques.
EP03005763A 2002-05-31 2003-03-14 Procédé pour déterminer la position du point de solidification finale d'une coulée continue en appliquant une oscillation Expired - Lifetime EP1369192B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10224533A DE10224533A1 (de) 2002-05-31 2002-05-31 Verfahren zur Ermittlung der Reibkraft bei einem erzwungenen Schwingungen ausgesetzten System
DE10224533 2002-05-31

Publications (2)

Publication Number Publication Date
EP1369192A1 EP1369192A1 (fr) 2003-12-10
EP1369192B1 true EP1369192B1 (fr) 2005-07-20

Family

ID=29432596

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03005763A Expired - Lifetime EP1369192B1 (fr) 2002-05-31 2003-03-14 Procédé pour déterminer la position du point de solidification finale d'une coulée continue en appliquant une oscillation

Country Status (3)

Country Link
EP (1) EP1369192B1 (fr)
AT (1) ATE299764T1 (fr)
DE (2) DE10224533A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10349962B3 (de) * 2003-10-24 2005-06-02 Ingo Dr. Schubert Anordnung zur Ermittlung der Konsistenz eines Gießstranges in einer Stranggießalage und/oder Maulweite derselben
DE102006016375B4 (de) * 2006-04-05 2023-02-16 Sms Group Gmbh Verfahren und Einrichtung zum Bestimmen der Kernerstarrung und/oder der Sumpfspitze beim Stranggießen von Metallen, insbesondere von Stahlwerkstoffen
DE102006047013B3 (de) * 2006-10-02 2008-05-29 Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH Verfahren zur Ermittlung einer flüssigen Phase im Innern eines an seiner Oberfläche bereits erstarrten Strangs
ITMI20121185A1 (it) 2012-07-05 2014-01-06 Danieli Off Mecc Metodo di determinazione della posizione di chiusura del cono liquido nella colata continua di prodotti metallici

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19720768C1 (de) * 1997-05-07 1999-01-14 Mannesmann Ag Verfahren und Vorrichtung zum Erzeugen von Brammen aus Stahl
DE10039016B4 (de) * 2000-08-10 2010-02-25 Sms Siemag Aktiengesellschaft Verfahren zum Erzeugen von Brammen aus Stahl

Also Published As

Publication number Publication date
ATE299764T1 (de) 2005-08-15
EP1369192A1 (fr) 2003-12-10
DE50300792D1 (de) 2005-08-25
DE10224533A1 (de) 2003-12-18

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