EP2905093A1 - Système de lingotière pour la coulée en continu de produits métalliques - Google Patents

Système de lingotière pour la coulée en continu de produits métalliques Download PDF

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Publication number
EP2905093A1
EP2905093A1 EP14154370.2A EP14154370A EP2905093A1 EP 2905093 A1 EP2905093 A1 EP 2905093A1 EP 14154370 A EP14154370 A EP 14154370A EP 2905093 A1 EP2905093 A1 EP 2905093A1
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EP
European Patent Office
Prior art keywords
mold
vibrations
arrangement according
wall
devices
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
EP14154370.2A
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German (de)
English (en)
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EP2905093B1 (fr
Inventor
Christian Dratva
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 Concast AG
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SMS Concast AG
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Publication date
Application filed by SMS Concast AG filed Critical SMS Concast AG
Priority to EP14154370.2A priority Critical patent/EP2905093B1/fr
Priority to PCT/EP2015/052378 priority patent/WO2015118050A1/fr
Publication of EP2905093A1 publication Critical patent/EP2905093A1/fr
Application granted granted Critical
Publication of EP2905093B1 publication Critical patent/EP2905093B1/fr
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    • 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
    • B22D11/07—Lubricating the moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B3/00—Methods or apparatus specially adapted for transmitting mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • 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
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/053—Means for oscillating the moulds

Definitions

  • the invention relates to a Kokillenan angel for continuous casting of metallic products, with a mold and connected thereto means for generating vibrations.
  • the friction between the mold inner wall and the strand shell surface can not be reduced by the oscillation parameters, since in the dead centers always creates a static friction, which acts on the solidifying shell. Furthermore, the oscillation inevitably generates a pulsating tensile and compressive force on the newly formed strand shell. This primarily limits the maximum possible casting speed due to the strength of the resulting strand shell.
  • the invention has for its object to avoid these disadvantages and to provide a mold of the type mentioned, which is characterized in that it effectively supports the transport of the strand with the simplest possible means or improves the quality of the strand surface.
  • the mold is preferably associated with a plurality of peripherally distributed devices for generating preferably resonant vibrations, such that vibrations are generated during the casting on the approximately entire inner wall of the mold.
  • actuators are preferably mounted in the upper region of the mold on the outside of the mold, which vibrations generate with a given amplitude and frequency range.
  • the mold according to the invention can also be provided with a conventional device for generating mechanical oscillations of the mold in the longitudinal direction of the mold.
  • a mold assembly 1 according to Fig. 1 with a mold 2 with a rectangular, square, polygonal or round cross-sectional profile is used for continuous casting of metallic products, such as long or flat products, especially steel products. It has a correspondingly shaped mold 2, a surrounding cooling box 20 for the water cooling and a preferably disc-shaped head part 3.
  • the mold assembly 1 are assigned a plurality of circumferentially distributed devices 5a to 5d for generating vibrations, such that during casting on the approximately entire inner wall 11 of the mold 2 in particular from the inlet to the outlet of the mold moving wave-shaped oscillations are generated.
  • four such devices 5a to 5d are arranged in the upper region of the mold 2.
  • These devices 5a to 5d are each advantageously equipped with piezoelectric actuators which generate vibrations directed in the mold 2 transversely to the longitudinal direction of the mold 2.
  • the devices 5a to 5d with the actuators are circumferentially distributed at the upper corners of the mold on the outside of the mold 2 attached.
  • the mold 2 is supported or held with advantage only on its upper side, while it is loose towards the bottom, so that the vibrations in the same can move down evenly.
  • the mold 2 is preferably held by the cooling box 20 surrounding it by a retaining ring 22 of the cooling box 20 which engages in a preferably outer annular groove at the upper end of the mold 2.
  • the respective device 5a fastened on the head part 3 comprises a cylindrical housing 51, a preferably piezoelectric bearing mounted therein Actuator 52 with a projecting plunger 55, a counterweight 53 connected to the actuator 52, a cover 54 which can be fastened to the housing on the front side, and a cable connection 56 for the actuator.
  • the actuator 52 is coupled, on the one hand, with the plunger 55 and the connecting bolt 55 'which is in contact with the outside of the mold 2, wherein this connecting bolt 55' is mounted axially displaceably in the cooling box 20.
  • the self-standing counterweight 53 is attached via a spacer screw 57 on the actuator 52 to accommodate thermal expansion.
  • the coupling of the spring-mounted actuator 52 to the likewise spring-mounted counterweight 53 causes the actuator 52 preferably exerts an on- or decongestant load on pressure on the mold 2 when activated, wherein it largely transfers the full impulse force to them at each shock pulse because the counterweight 53, with its mass inertia, absorbs the resulting reaction force almost immovably.
  • an approximately constant contact pressure of the actuator 52 and the plunger 55 is effected with the connecting pin 55 'to the Kokillenaussenseite.
  • the actuator 52 is internally connected through line connections 58 (see FIG Fig. 1 ) air or water cooled and can generate excitation oscillations of up to about 10000 Hz.
  • the plunger 55 could be coupled with the connecting bolt 55 'and the mold 2 mechanically free of play, so that in each case not only a pressure shock on the mold 2, but when moving back the plunger 55 with the connecting pin 55' and a pulling movement radially outward would affect them.
  • the vibrations generated by the actuators 52 are phase-matched so that the vibrations wander along the wavy shape from top to bottom.
  • the existing friction between the inner wall of the mold 2 and the strand moving thereon is reduced according to the invention by the vibrations, because they are the contact surface 11 between the mold 2 and the Strand shell 10 are effective.
  • the wave-like propagation of the vibrations in the direction of the withdrawal movement of the strand in turn generates a displacement force 14 on the shell wall of the strand, which supports the discharge of the strand during the casting process.
  • This effect is particularly strong when the mold 2, an inner wall 11 lubricating oil film 15 or slag is supplied. Due to the pyrolytic splitting of the oil film primarily in carbon C and hydrogen-rich gas H2 occurring in the meniscus of the resulting strand in the upper mold region, the latter flow through the joint between the inner wall of the mold and the strand shell in the direction of the arrow 13 from top to bottom, which is caused by the Vibrations is supported.
  • pockets 12 are formed on the inner wall by this undulating course, as shown in FIG Fig. 3 is clarified.
  • the gas is then absorbed, which forms a protective film and is taken down.
  • the adhesion of the solidifying steel is made impossible. If no lubricant is used, the air in the bag serves as a protective film.
  • the carbon C is known to have a lubricating effect, which also reduces the friction between the strand shell and the mold.
  • the hydrogen-rich gas H2 acts, as mentioned above, in turn like an air cushion and thus also helps to minimize the friction between the mold and strand.
  • the arrow 16 symbolizes the pyrolysis taking place there.
  • the inventive arrangement of the devices 5a to 5d in the upper region of the mold is optimal for a uniform distribution of the resonant vibrations or vibrations on all four side walls of the mold.
  • the actuators may be mounted in the upper mold part laterally and preferably centrally on the four side walls of the mold.
  • the frequency of the vibrations generated corresponds to the resonant vibrations of the mold 2 resulting from the intrinsic shape.
  • the necessary oscillation generation can be carried out with a low expenditure of energy.
  • the devices 5 a to 5 d can advantageously be arranged in the space surrounding the mold 2, which is supplied with a water circulation, so that they too are sufficiently lapped and thus cooled. This space is formed by the mold and a surrounding mold, not shown.
  • the invention further provides that the power and / or the exciter frequency and / or the oscillation amplitude of the individual actuators are adapted to the size and rigidity of the mold.
  • a form-fit connection could also be provided between the mold outer side and the actuator, in which case a compressive and tensile load on the mold outer side would then be effected.
  • FIG. 4 and FIG. 5 each show the mold 2, which is offset by these devices, not shown 5a to 5d in the predetermined oscillations. These oscillations moving downwards along the longitudinal extent of the mold are disproportionately illustrated for better recognition.
  • Fig. 4 as a snapshot is formed by this generated vibration field in the upper part of the mold 2, a bulge 23, in which a cross-sectional enlargement in both the surface 23 'and in the corner regions 23 "is present,
  • a constriction 24 is formed in which a cross-sectional constriction in the surface 24 'as well as in the corner regions 24 "is present.
  • FIG. 4 and FIG. 5 illustrate also that with these alternating bulges 23 or constrictions 24 due to this waveform a kind of swallowing motion, since with the downwardly bulging bulges 23 each increase the volume in the cavity of the mold 2 over a limited height. Thus, the liquid steel is moved as by swallowing down.
  • the devices could be distributed over the height of the mold to achieve on the inner wall of the mold at least from the upper to the lower region different waveforms in terms of wave velocity and / or wave amplitude.
  • the vibrations generated by these devices could also be timed to each other that these vibrations obliquely, for example helically, from the inlet to the outlet of the mold on the inner wall of the mold continuously and / or interrupted move. This would be particularly suitable for molds with round format. This could be achieved by arranging them around the mold Vibration generator short-term succession off and on again.
  • the mold according to the invention may be composed of mold tubes or of plates.
  • Additional passive actuators could also be arranged on the outside of the mold. These would then be provided with vibrations that would cause a targeted damping of the actual vibrations, so as to stabilize the mold and optionally to influence the wave-like vibration movements.
  • the devices can also be equipped with hydraulically or pneumatically acting vibration generators, in particular mass exciters, for example with mechanically acting percussion hammers which can be actuated electromagnetically or the like. With these hammer blows would be triggered only a blow in one direction.
  • An additional device could also be provided, by means of which the mold is mechanically oscillated back and forth in the longitudinal direction, as is known per se.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
EP14154370.2A 2014-02-07 2014-02-07 Système de lingotière pour la coulée en continu de produits métalliques Active EP2905093B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP14154370.2A EP2905093B1 (fr) 2014-02-07 2014-02-07 Système de lingotière pour la coulée en continu de produits métalliques
PCT/EP2015/052378 WO2015118050A1 (fr) 2014-02-07 2015-02-05 Agencement de lingotière pour la coulée continue de produits métalliques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14154370.2A EP2905093B1 (fr) 2014-02-07 2014-02-07 Système de lingotière pour la coulée en continu de produits métalliques

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EP2905093A1 true EP2905093A1 (fr) 2015-08-12
EP2905093B1 EP2905093B1 (fr) 2018-08-29

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WO (1) WO2015118050A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105312515A (zh) * 2015-11-26 2016-02-10 中冶京诚工程技术有限公司 宽厚板用钢锭的铸造设备及其方法
CN110732477A (zh) * 2019-10-25 2020-01-31 哈尔滨工程大学 一种含传振杆的螺旋声波发射换能器

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102020116143A1 (de) 2020-06-18 2021-12-23 Voestalpine Additive Manufacturing Center Gmbh Aktuator für eine gussform zur herstellung metallischer bauteile

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1433027A1 (de) * 1960-04-05 1968-10-10 Ct Nat De Rech S Metallurg Verfahren und Vorrichtung zum fortlaufenden Schnellguss
US3447480A (en) * 1967-07-24 1969-06-03 Bodine Albert G Method and apparatus for gravity flow casting utilizing sonic energization
DE3113611A1 (de) * 1980-04-04 1982-04-01 Nippon Steel Corp., Tokyo Verfahren zum stranggiessen von oberflaechenfehlerfreien stahlbrammen und -vorbloecken
JPS5762842A (en) * 1980-09-29 1982-04-16 Nippon Kokan Kk <Nkk> Ultrasonic vibration mold for continuous casting
DE3100137A1 (de) * 1981-01-05 1982-09-09 Nippon Steel Corp., Tokyo Stranggiessverfahren und stranggussform
EP0144795A2 (fr) * 1983-12-01 1985-06-19 Fried. Krupp Gesellschaft mit beschränkter Haftung Procédé d'oscillation d'un moule horizontal de coulée continue pour métaux, en particulier l'acier
EP0178967A1 (fr) * 1984-09-26 1986-04-23 INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France Lingotière vibrante de coulée continue des métaux
US4593743A (en) * 1985-05-09 1986-06-10 Continuous Casting Systems Inc. Continuous casting apparatus having oscillator for mold tube
EP0305930A1 (fr) * 1987-08-29 1989-03-08 Nippon Steel Corporation Lingotière de coulée continue et procédé pour son oscillation aux hautes fréquences
GB2334691A (en) * 1998-02-26 1999-09-01 Kvaerner Metals Cont Casting Skewed sinusoidal profile for displacement of a continuous casting mould
DE10155117A1 (de) * 2001-11-09 2003-05-22 Sms Demag Ag Stranggießkokille zum Vergießen von Metall, insbesondere in einen vergleichsweise dünnen Strang mit hoher Gießgeschwindigkeit
WO2004028723A1 (fr) * 2002-09-21 2004-04-08 Sms Demag Aktiengesellschaft Dispositif pour la coulee continue de metaux, notamment de materiaux a base d'acier, en produits longs dans une installation de coulee continue a plusieurs lignes
WO2006003084A2 (fr) * 2004-06-25 2006-01-12 Sms Demag Aktiengesellschaft Moule de coulee continue comportant un dispositif oscillant
EP2292351A1 (fr) * 2008-06-30 2011-03-09 Nippon Light Metal, Co., Ltd. Moule de coulée à commande de pression de gaz

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2108878A (en) * 1981-11-06 1983-05-25 British Steel Corp Vibration of a continuous casting machine mould
IT1288989B1 (it) * 1996-09-25 1998-09-25 Danieli Off Mecc Procedimento per l'ottenimento di vibrazioni delle pareti del cristallizzatore di una lingottiera mediante attuatori e

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1433027A1 (de) * 1960-04-05 1968-10-10 Ct Nat De Rech S Metallurg Verfahren und Vorrichtung zum fortlaufenden Schnellguss
US3447480A (en) * 1967-07-24 1969-06-03 Bodine Albert G Method and apparatus for gravity flow casting utilizing sonic energization
DE3113611A1 (de) * 1980-04-04 1982-04-01 Nippon Steel Corp., Tokyo Verfahren zum stranggiessen von oberflaechenfehlerfreien stahlbrammen und -vorbloecken
JPS5762842A (en) * 1980-09-29 1982-04-16 Nippon Kokan Kk <Nkk> Ultrasonic vibration mold for continuous casting
DE3100137A1 (de) * 1981-01-05 1982-09-09 Nippon Steel Corp., Tokyo Stranggiessverfahren und stranggussform
EP0144795A2 (fr) * 1983-12-01 1985-06-19 Fried. Krupp Gesellschaft mit beschränkter Haftung Procédé d'oscillation d'un moule horizontal de coulée continue pour métaux, en particulier l'acier
EP0178967A1 (fr) * 1984-09-26 1986-04-23 INSTITUT DE RECHERCHES DE LA SIDERURGIE FRANCAISE (IRSID) France Lingotière vibrante de coulée continue des métaux
US4593743A (en) * 1985-05-09 1986-06-10 Continuous Casting Systems Inc. Continuous casting apparatus having oscillator for mold tube
EP0305930A1 (fr) * 1987-08-29 1989-03-08 Nippon Steel Corporation Lingotière de coulée continue et procédé pour son oscillation aux hautes fréquences
GB2334691A (en) * 1998-02-26 1999-09-01 Kvaerner Metals Cont Casting Skewed sinusoidal profile for displacement of a continuous casting mould
DE10155117A1 (de) * 2001-11-09 2003-05-22 Sms Demag Ag Stranggießkokille zum Vergießen von Metall, insbesondere in einen vergleichsweise dünnen Strang mit hoher Gießgeschwindigkeit
WO2004028723A1 (fr) * 2002-09-21 2004-04-08 Sms Demag Aktiengesellschaft Dispositif pour la coulee continue de metaux, notamment de materiaux a base d'acier, en produits longs dans une installation de coulee continue a plusieurs lignes
WO2006003084A2 (fr) * 2004-06-25 2006-01-12 Sms Demag Aktiengesellschaft Moule de coulee continue comportant un dispositif oscillant
EP2292351A1 (fr) * 2008-06-30 2011-03-09 Nippon Light Metal, Co., Ltd. Moule de coulée à commande de pression de gaz

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105312515A (zh) * 2015-11-26 2016-02-10 中冶京诚工程技术有限公司 宽厚板用钢锭的铸造设备及其方法
CN110732477A (zh) * 2019-10-25 2020-01-31 哈尔滨工程大学 一种含传振杆的螺旋声波发射换能器

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WO2015118050A1 (fr) 2015-08-13
EP2905093B1 (fr) 2018-08-29

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