EP1369192A1 - Procédé pour déterminer la pointe du noyeau liquide d'une coulée continue en appliquant une oscillation - Google Patents

Procédé pour déterminer la pointe du noyeau liquide d'une coulée continue en appliquant une oscillation Download PDF

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Publication number
EP1369192A1
EP1369192A1 EP03005763A EP03005763A EP1369192A1 EP 1369192 A1 EP1369192 A1 EP 1369192A1 EP 03005763 A EP03005763 A EP 03005763A EP 03005763 A EP03005763 A EP 03005763A EP 1369192 A1 EP1369192 A1 EP 1369192A1
Authority
EP
European Patent Office
Prior art keywords
oscillation
strand
continuous casting
tip
der
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.)
Granted
Application number
EP03005763A
Other languages
German (de)
English (en)
Other versions
EP1369192B1 (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 frictional force between at least two elements of a mechanical system, one of the elements is subjected to a forced movement, in particular a vibration, for example between an oscillating mold and a strand shell or between the oscillating bowl and the liquid core of the cast product, primarily to determine the bottom of a sump inside a cast strand its exit from the mold with a core surrounding a liquid metal Strand shell, due to increasing heat emission with growing Thickness extends to the solidus point of the swamp tip, and then a solidified one Continuous casting product, in particular forms a continuous casting slab.
  • a forced movement in particular a vibration
  • a vibration for example between an oscillating mold and a strand shell or between the oscillating bowl and the liquid core of the cast product
  • a method for producing is known from document EP 0 980 295 B1 of steel slabs, the guidance of a strand using guide rollers is continuously adjusted.
  • the jaw width of the guide rollers with a predefinable amplitude oscillating around a center line when extending of the strand changed in such a way that the dynamic influences on the guide rollers and the strand shell is negligibly small and not plastic Deformation of the strand shell occurs; the current jaw width is recorded; at the same time the actuating force of the adjusting elements and the amplitude of the actuating force determined, and with increasing amplitude of the actuating force, the mouth width is opened a predeterminable dimension is set and / or via at least one adjusting element pressure controlled.
  • the course of the actuating force has Form of a hysteresis, the spread of the actuating force, based on an associated Mouth width as a measure of the viscosity of the liquid in the slab Bottom, and depending on the viscosity determined conclusions on the Position of the sump tip are pulled, and the mouth width adjustment adjusted becomes.
  • Document EP 0 350 431 B1 describes a process for the continuous casting of Slabs with a reduced thickness compared to the as-cast state, whereby a partially solidified strand guided between pairs of rollers, by means of driven Rolls pulled off and individual rolls acting deformable with respect to the strand are employable.
  • the speed, the current consumption of the driven Rolls and their contact pressure recorded and fed to a controller.
  • the speed governing the speed of individual driven rollers is via a higher-level one Regulator adjustable so that by at least one against stops adjustable, which determines the thickness of the strand, on a solidified one Part of the strand deforming acting roller pair the gauge block and the withdrawal speed of the strand is determined.
  • Upstream or downstream Roles are in the speed and power consumption of their drives depending on the change in shape of the strand produced by the rollers set, the current consumption, reaction force of the Stranges and the roller spacing determines the position of the sump tip and the contact pressure the roles are set so that the swamp tip before at least an adjustable against stops at a predetermined distance Pair of roles lies.
  • the document DE-OS 25 30 032 discloses a method and an apparatus for Determination of those 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 rollers and in a plane at a distance below the The mold froze over its entire cross-section.
  • the level of complete solidification becomes more common by measuring on a large number of pairs of rollers Pressure forces and comparing the measured values on different pairs of rollers Determination of the pair of rollers determined, beyond that no further The load increases.
  • the document DE-OS 34 23 977 A1 describes a method for contactless Measurement of the solidified surface layer of a metal casting 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 device is measured without contact.
  • the thickness of a solidified surface layer is determined from the strength of the eddy currents according to the difference of the specific electrical resistance between a non-solidified molten Determined part and a solidified part of the casting.
  • JP 11083814 A describes a method for determining the solidification state of a casting. It is one with electromagnetic Element acting on a casting supersonically in cooperation with one to provide the supersonic signal receiving switching system, which the Intensity of the propagating ultrasound waves recorded, evaluated and together compares.
  • the position of the sump tip can thus be derived from the phase angle ( ⁇ ).
  • the object of the invention based on demonstrating a method by which the mechanical or dynamic Properties of a forced oscillatory system measured and for the direct determination of the system status of a cast strand can be used to precisely determine the position of the swamp tip.
  • an oscillation is forced on the continuous casting product with the aid of an element, for example a roller frame of the continuous casting system, and the mechanical power or work applied in a coordinate system broken down into apparent (P S ), active (P w ) and reactive power (P B ) or work, and the position of the sump peak is determined from a phase angle ( ⁇ ) which can be derived therefrom in accordance with these proportions.
  • an element for example a roller frame of the continuous casting system
  • the invention takes advantage of the fact that the mechanical or dynamic Properties of a cast slab depending on their Consistency, e.g. B. solid or liquid or the mixtures in the removal of change the mold outlet to the end of the swamp.
  • Consistency e.g. B. solid or liquid or the mixtures in the removal of change the mold outlet to the end of the swamp.
  • the ratio of active power (work) to reactive power (work) changes or apparent power (work) and can be used to determine the phase angle ( ⁇ ) be evaluated. This then characterizes the current status the consistency of the system or slab.
  • the determined phase angle evaluated as a significant feature of the mechanical system and for Determination of the position of the swamp tip used.
  • the coordinate system shows that at maximum reactive power P B, the angle of P S to 90 ° is, the effective power P W to zero decreases, whereas in tendential decrease in the reactive power P B to zero, the effective power P W against a maximum tends.
  • this method is without or can be implemented with only very little mechanical and drive-related effort (e.g. CyberLink segments, resonance molds).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
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 true EP1369192A1 (fr) 2003-12-10
EP1369192B1 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)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1525931A1 (fr) * 2003-10-24 2005-04-27 Ingo Dr. Schubert Dispositif pour déterminer la consistance d'un lingot coulée et/ou l'ouverture de rouleaux dans une machine de coulée continue
WO2007115744A1 (fr) * 2006-04-05 2007-10-18 Sms Demag Ag Procede et dispositif de determination de la solidification du cœur et/ou de la pointe de pied en coulee continue de metaux, en particulier de materiaux a base d'acier
WO2008040519A1 (fr) * 2006-10-02 2008-04-10 Betriebsforschungsinstitut VDEh-Institut für angewandte Forschung GmbH Procédé de détermination d'une phase liquide à l'intérieur d'une barre de coulée à surface déjà solidifiée
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

Citations (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
DE10039016A1 (de) * 2000-08-10 2002-02-21 Sms Demag Ag Verfahren zum Erzeugen von Brammen aus Stahl

Patent Citations (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
DE10039016A1 (de) * 2000-08-10 2002-02-21 Sms Demag Ag Verfahren zum Erzeugen von Brammen aus Stahl

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1525931A1 (fr) * 2003-10-24 2005-04-27 Ingo Dr. Schubert Dispositif pour déterminer la consistance d'un lingot coulée et/ou l'ouverture de rouleaux dans une machine de coulée continue
WO2007115744A1 (fr) * 2006-04-05 2007-10-18 Sms Demag Ag Procede et dispositif de determination de la solidification du cœur et/ou de la pointe de pied en coulee continue de metaux, en particulier de materiaux a base d'acier
WO2008040519A1 (fr) * 2006-10-02 2008-04-10 Betriebsforschungsinstitut VDEh-Institut für angewandte Forschung GmbH Procédé de détermination d'une phase liquide à l'intérieur d'une barre de coulée à surface déjà solidifiée
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
WO2014006195A1 (fr) * 2012-07-05 2014-01-09 Danieli & C. Officine Meccaniche S.P.A. Procédé pour déterminer un segment de ligne de coulée contenant la position de fermeture du cône de liquide d'un produit métallique coulé en continu
US9399252B2 (en) 2012-07-05 2016-07-26 Danieli & C. Officine Meccaniche S.P.A. Method for determining a stretch of casting line including the closing position of the liquid cone of a continuously cast metal product

Also Published As

Publication number Publication date
DE10224533A1 (de) 2003-12-18
ATE299764T1 (de) 2005-08-15
DE50300792D1 (de) 2005-08-25
EP1369192B1 (fr) 2005-07-20

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