EP0468607B2 - Moule refroidi par liquide pour la coulée continue de métaux - Google Patents

Moule refroidi par liquide pour la coulée continue de métaux Download PDF

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Publication number
EP0468607B2
EP0468607B2 EP91250192A EP91250192A EP0468607B2 EP 0468607 B2 EP0468607 B2 EP 0468607B2 EP 91250192 A EP91250192 A EP 91250192A EP 91250192 A EP91250192 A EP 91250192A EP 0468607 B2 EP0468607 B2 EP 0468607B2
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EP
European Patent Office
Prior art keywords
spring members
support plate
plates
walls
mould according
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
EP91250192A
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German (de)
English (en)
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EP0468607A1 (fr
EP0468607B1 (fr
Inventor
Horst Von Wyl
Franz-Ulrich Laumeier
Hans-Joachim Biedermann
Martin Brüggemann
Rolf Dr. Schneider
Hans Siemer
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.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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Publication date
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Priority claimed from DE19904023672 external-priority patent/DE4023672A1/de
Application filed by Mannesmann AG filed Critical Mannesmann AG
Publication of EP0468607A1 publication Critical patent/EP0468607A1/fr
Publication of EP0468607B1 publication Critical patent/EP0468607B1/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
    • B22D11/04—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 liquid-cooled mold for the Continuous casting of metals, especially steel.
  • strand format to be generated usually for the production of billet, bloom and round strands Tube molds, used for the manufacture of slab plate molds.
  • the molds are in the casting direction oscillates.
  • a sinusoidal mold movement is preferred, the speed of the downward movement of the mold being greater than that is usually constant strand withdrawal speed (negative strip).
  • the frequency and the stroke height of the oscillation movement is based on the Strand withdrawal speed coordinated. For example, at Slab formats with dimensions of 250 mm x 2000 mm Line withdrawal speeds of 1.3 m / min a frequency of approx. 100 Vibrations per minute at lifting heights (amplitude of a vibration) of 4 up to 15 mm common values. In terms of frequency, too higher vibration numbers have been proposed. The realization But so far failed due to the size of the mass to be moved. For the specified slab format, the mass to be moved is approx. 30 t.
  • the invention has for its object in liquid-cooled,
  • the molds are suspended under oscillating molds Inclusion of the oscillation device in the to be moved Reduce mass in order to increase the number of vibrations with the lowest possible To be able to adjust power requirements.
  • the plate mold shown in Fig. 1 consists of the shaping Wall 1 in the form of copper plates that form the mold cavity for the form generating strand.
  • the copper plates 1 are on support plates 2 attached.
  • the copper plates 1 are water-cooled.
  • the coolant is via flexible lines and the connections 14 and Flow channel 15 (Fig. 2) to the support plates 2 of the broad sides or dissipated by these.
  • the supply of the copper plates 1 of the Narrow sides 3 can be done in the same way.
  • the narrow sides 3 are clamped between the broad side plates 1, 2 and are from Adjustment devices 5 with which the width of the slab to be produced is set, worn in turn on clamping elements 13, which the Connect support plates 2 outside the flow channels 15, attached are.
  • the Support plates 2 On the outside, ie the sides of the Support plates 2 is a plurality of spring elements 7 - here leaf springs - fixed on one side.
  • Laminates are used which are made of leaf springs vulcanized intermediate layers are formed from elastomers.
  • the Leaf springs are evenly spaced apart across the surface distributed and extend transversely to the casting direction. They point in the casting direction a much lower rigidity than in both transverse directions. With her the leaf springs are at the other ends a support plate 6 attached.
  • the support plates 6 are in turn hydraulic, via spring-loaded uncouplable adjusting and adjusting elements 11 (see FIG. 5) on one locally, the support plates 6 and the narrow side plates 3 encompassing Base frame 12 attached.
  • This basic solution ensures that only the actual crystallizer, i.e. the copper plates with the associated ones Support plates including the adjustment device for the narrow sides are to be moved by the oscillation device. Compared to the conventional slab molds will reduce the number of parts to be moved Mass achieved by about 60%. On the one hand, this can result in a higher Vibration number can be achieved, on the other hand, the drive (16) Oscillation device built smaller and on the base frame (12) be attached. This is also a shortening or a Reduction in the transfer of forces from the drive to the mold otherwise necessary mechanics.
  • Wall 1 which forms the mold cavity for the strand to be produced, from a copper tube of circular cross-sectional shape with curved Longitudinal axis 19.
  • a copper tube of circular cross-sectional shape with curved Longitudinal axis 19 are used.
  • the copper tube 1 is in a manner known per se Wasserleitmantel 20 surrounded and is provided on the pipe ends Flanges 18 and one the copper tube 1 and the water jacket 20 enclosing tubular support plate 2 held.
  • the flanges 18 have a rectangular shape when viewed from above. At two each other opposite sides of the flanges 18 are the spring elements 7, too here designed as leaf springs, arranged transversely to the casting direction.
  • the Spring elements 7 are on mounting strips 8 on a support plate 6, which is connected to a base frame 12, attached.
  • the mold is by means of a hydraulic cylinder 16 which on the one hand on the Support plate 2 attacks and on the other hand on the support plate 6 supports a connecting web 21, oscillatable.
  • the spring elements 7 are with their Longitudinal axis 7 'aligned so that their imaginary extensions in Center of curvature 22 of the mold, or in one through the Center of curvature 22, perpendicular to the spring element axes 7 ' running line, cut.
  • the "center of curvature" is infinite, the arranged one above the other, attached to the two pipe ends Spring elements 7 in total parallel to each other.
  • the invention is of course also applicable to a tubular mold the cooling takes place through cooling channels running in the wall 1.
  • the tubular support plate 2 can rest directly on the wall 1 and the attachment of the spring elements in the same way as described for the slab mold.
  • connection between fixed (support plates) and movable (support plates) mold parts via the spring elements is designed such that, in particular in the case of plate molds a relative movement of the inner to the outer plates in the casting direction is possible around the underlying oscillation stroke, the inner and outer plates form a unit that is rigid against bending around the vertical axis (in particular from thermal stresses), radial forces from ferrostatic pressure and the required preload as well Shear forces in the direction of the longer slab edge can be transferred from the inner to the outer plate, the natural frequency of the total spring stiffness of the spring leaves in connection with the oscillating mass of the mold corresponds to the desired highest operating frequency and From the dynamic zero position (static countersink), the highest possible accuracy of the casting radius is guaranteed in the range of the intended oscillation amplitude.
  • the oscillating mass results from the strand format to be cast and the design of the crystallizer plates used. If these parameters change under other conditions, this fact can be taken into account by changing the spring parameters accordingly.
  • Stroke and frequency result from the casting speed to be achieved, whereby according to the underlying concept, small amplitudes and high frequencies are preferred because with increasing operating frequency, the spring stiffness required for resonance increases and thus the static sag decreases and with a lower amplitude, the alternating bending stress of the spring leaves decreases.
  • Handlebar length, width and number result essentially from the available installation space and the design of the used Crystallizer plates, here are different designs possible, in which case the handlebar thicknesses must be adjusted accordingly.
  • the guidance accuracy is therefore dependent on the dimensions and the mounting positions of the handlebars.
  • the handlebars are arranged as follows: Starting from an orientation in which the extension of the imaginary connecting lines from the inner and outer articulation points of all links point to the center of the casting the hinge-side articulation points shifted upwards by the amount of the static sag. This arrangement is a prerequisite for the slight deviation of all points of contact between the strand and the shaping wall.
  • the "constructive zero position" is denoted by a.
  • the The point of attack of the leaf springs 7 on the support plate is by the amount of static sag.
  • the dynamic results from this Zero position b.
  • the Dynamic zero position is at the same time the operating point around which the support plate 2 with the shaping wall 1 oscillates, the top dead center of the oscillation with c and the bottom dead center of the oscillation are designated d.
  • a hydraulic cylinder in particular as an oscillation drive for the recommends the above-described design of a mold according to the invention.
  • the hydraulic cylinder can be designed small, because in the Basically only the friction between the mold wall and Strand shell must be overcome. Since also the hydraulic cylinder can be operated with operating pressures below 10 bar Power source for example the cooling water system of the mold or that Machine cooling applicable. Furthermore, that with the invention is recommended feasible solution due to the design with the smallest space requirement for use in multiple continuous casting plants for billet and Bloom formats.
  • This Consoles form support surfaces for the clamping jaws 111
  • Clamping jaws 111 have a circular cross section Drilling on.
  • Clamping pieces 112 are arranged in this bore, which are made from two cylinder sections.
  • these clamping pieces Adjusted bore in the jaws and in turn point in Cross-section seen a semicircular on the bore inner wall adjacent surface as well as a flat surface that the or Spring element (s) facing (are).
  • the spring elements can also the intermediate layers made of consistently thick Flat material can be produced.
  • 11a is different only one spring element is provided from the illustration in FIG. 9, corresponding intermediate layers above and below are shown.
  • FIG. 11b corresponds to FIG Representation in Figure 9
  • Figure 11c is a Arrangement with three spring elements can be seen in the corresponding thinner intermediate layers are used.
  • This unit can then laterally in the Holes are inserted into the jaws, and then the screws indicated with 115 are replaced by a corresponding one Bore in the jaws or through the adapter sleeve and the bracket 117 passed through and when screwing is not only done an adjustment, but also a firm connection between the spring elements and the console via the clamping pieces or clamping jaws. It is essential that - and this follows from FIG. 9 - the Screws 115 have a smaller diameter than that Inner dimension of the adapter sleeve. Due to the shape of the surfaces the Clamping pieces or jaws and the dimensioning of the clamping screws is achieved that both in the operation of the mold axial forces as well as bending moments from the spring elements frictionally transferred to the consoles. It works Articulation described in operation as a rigid connection. The Effect as a rotating or rotating push-joint is on the Adjustment process limited.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)
  • Adornments (AREA)
  • Details Of Heat-Exchange And Heat-Transfer (AREA)
  • Freezing, Cooling And Drying Of Foods (AREA)
  • Springs (AREA)

Claims (14)

  1. Moule refroidi par un liquide et monté de façon oscillante pour la coulée continue de métaux, en particulier de l'acier, comportant une paroi (1) donnant la forme en un matériau en particulier métallique, qui est fixée à des plaques d'appui (2) et qui est munie de raccordements (14), pour un liquide de refroidissement pour refroidir la paroi, dans lequel, sur des plaques d'appui (2) opposées, sur la face opposée à la paroi (1) des faces larges, sont fixés d'un seul côté et selon une répartition uniforme, directement ou par l'intermédiaire de brides reliées aux plaques d'appui, des éléments élastiques (7) qui présentent dans le sens de coulée une rigidité beaucoup plus réduite que selon les deux directions transversales, les éléments élastiques (7) s'étendent dans une direction transversale au sens de coulée, les extrémités opposées des éléments élastiques (7) sont fixées sur des plaques de support (6), les plaques de support (6) sont reliées à un cadre de base (12) à poste fixe et un dispositif d'oscillation (16,17) agit sur les plaques d'appui (2), et la position des éléments élastiques (7) est alignée vers le centre de courbure du moule et le point d'articulation des éléments élastiques (7) sur la plaque d'appui (2) est décalé de la valeur d'abaissement statique de sorte qu'ils prennent dans l'état contraint la position qu'ils prendraient dans l'état non contraint lors de l'alignement au centre de courbure ou sur un axe (22) traversant le centre de courbure.
  2. Moule refroidi par un liquide et monté de façon oscillante pour la coulée continue de métaux, en particulier de l'acier, comportant une paroi (1) donnant la forme en un matériau en particulier métallique, qui est fixée à une plaque d'appui (2) et qui est munie de raccordements (14) pour un liquide de refroidissement pour refroidir la paroi, dans lequel, sur la plaque d'appui (2), sur la face opposée à la paroi (1), sont fixés d'un seul côté et selon une répartition uniforme, directement ou par l'intermédiaire de brides reliées à la plaque d'appui, des éléments élastiques (7) qui présentent dans le sens de coulée une rigidité beaucoup plus réduite que selon les deux directions transversales, les éléments élastiques (7) s'étendent dans une direction transversale au sens de coulée, les extrémités opposées des éléments élastiques (7) sont fixées sur une plaque de support (6), la plaque de support (6) est reliée à une cadre de base (12) à poste fixe et un dispositif d'oscillation (16,17) agit sur la plaque d'appui (12), et la paroi (1) est réalisée en forme de tube et est reliée aux deux extrémités à la plaque d'appui (2) par des brides (18) agencées transversalement à l'axe du tube, les brides (18) de la plaque d'appui (2) sont rectangulaires en vue de dessus et les éléments élastiques (7) sont fixés à deux faces opposées de la plaque d'appui (2) ou des brides (18), et la position des éléments élastiques (7) est alignée vers le centre de courbure du moule et le point d'articulation des éléments élastiques (7) sur la plaque d'appui (2) est décalé de la valeur d'abaissement statique de sorte qu'ils prennent dans l'état contraint la position qu'ils prendraient dans l'état non contraint lors de l'alignement au centre de courbure ou sur un axe (22) traversant le centre de courbure.
  3. Moule refroidi par un liquide selon la revendication 1 ou 2,
    caractérisé en ce que la rigidité élastique totale des éléments élastiques (7) est choisie dans le sens de coulée de sorte que le système oscillant constitué d'éléments élastiques (7) et de masses oscillantes présente une fréquence propre de la valeur de la fréquence de fonctionnement la plus élevée exigée.
  4. Moule selon la revendication 1,
    caractérisé en ce que la paroi (1) est formée de plaques présentant des plaques (3) à faces minces opposées, agencées de façon coulissante et maintenues entre deux plaques à faces larges (1,2), les plaques d'appui (2) pour la paroi (1) des faces larges sont situées parallèlement au plan de plaque de la paroi (1), les éléments élastiques (7) reliant les plaques d'appui (2) aux plaques de support (6) s'étendent dans un agencement en forme de ligne sur la hauteur et la largeur des plaques (2,6), les plaques de support (6) peuvent être réglées les unes par rapport aux autres par l'intermédiaire d'éléments de réglable (10) et d'ajustage (11) contraints élastiquement, pouvant être découplés de façon hydraulique et agencés sur le cadre de base (12) à poste fixe, et le cadre de base (12) entoure le moule.
  5. Moule selon la revendication 4,
    caractérisé en ce que les plaques à faces minces (3) sont munies, sur leurs faces externes en contact avec les plaques à faces larges (1,2), d'éléments donnant la forme qui agissent de façon mécanique dans des guides (4) dans la paroi (1), qui s'étendent sur le bord supérieur des faces larges transversalement au sens de coulée.
  6. Moule selon l'une des revendications 1 à 4,
    caractérisé en ce que les éléments élastiques (7) sont reliés par leurs extrémités à la plaque d'appui (2) et à la plaque de support (6), par l'intermédiaire de tiges de fixation (8) qui sont agencées, avec un écartement, parallèlement les unes par rapport aux autres et transversalement au sens de coulée.
  7. Moule selon l'une des revendications 1 à 6,
    caractérisé en ce que des tiges de renfort (9) s'étendant en direction de coulée sont agencées sur la plaque d'appui (2) et sur la plaque de support (6) entre des rangées de plusieurs ressorts à lames (7) agencés les uns au-dessus des autres avec un écartement.
  8. Moule selon l'une des revendications 1 à 6,
    caractérisé en ce que les canaux d'écoulement (15) s'étendant au-delà de la plaque d'appui (2) dans sa zone supérieure et sa zone inférieure sont agencés sur la face externe de la plaque d'appui (2), canaux d'écoulement qui sont reliés par l'intermédiaire d'évidements de la plaque d'appui (2) à des canaux de refroidissement pour refroidir les plaques en cuivre (1) et présentent des raccordements (14) pour l'amenée et l'évacuation de fluides de refroidissement.
  9. Moule selon l'une des revendications 4 à 8,
    caractérisé en ce que les plaques d'appui (2) sont reliées à l'extérieur des canaux d'écoulement (15) par l'intermédiaire d'éléments tendeurs (13) qui portent les dispositifs de réglage (5) pour les faces minces (3) pour le réglage de largeurs de barres de coulée différentes.
  10. Moule selon l'une des revendications 1 à 9,
    caractérisé en ce que la valeur du décalage est inversement proportionnelle au carré de la fréquence de fonctionnement.
  11. Moule selon l'une des revendications 1 à 10,
    caractérisé en ce que les éléments élastiques (116) sont maintenus à leurs extrémités dans des coussinets de serrage (111) qui sont reliés à des consoles formant des faces porteuses situées sur la plaque d'appui ou sur la plaque de support, au moyen de vis de serrage (115) traversant les éléments élastiques.
  12. Moule selon la revendication 11,
    caractérisé en ce que les faces de serrage des coussinets de serrage (111) représentent -vues en section transversale- des perçages circulaires, en ce que des pièces de serrage (112) formées de tronçons cylindriques y sont agencées, pièces de serrage qui présentent -vues en section transversale- à chaque fois une surface en forme de demi-cercle située sur la paroi interne du perçage, ainsi qu'une surface plane en regard des éléments élastiques, en ce qu'entre les pièces de serrage (112) sont agencés un ou plusieurs éléments élastiques (116) qui sont maintenus de façon écartée les uns des autres par une ou plusieurs lames intermédiaires (114).
  13. Moule selon l'une des revendications 11 ou 12, caractérisé en ce que les pièces de serrage (112) ainsi que les éléments élastiques (116) présentent des perçages s'étendant perpendiculairement à l'axe longitudinal des éléments élastiques (116), et en ce que les pièces de serrage et les éléments élastiques sont reliés par des douilles de calibrage (113) entraínées à travers les perçages, à travers lesquelles douilles sont guidées les vis de serrage (115).
  14. Moule selon l'une des revendications 11 à 13, caractérisé en ce que le diamètre externe des vis de serrage (115) est plus petit que le diamètre interne libre des douilles de calibrage (113) de sorte qu'un espace est créé entre les deux.
EP91250192A 1990-07-23 1991-07-16 Moule refroidi par liquide pour la coulée continue de métaux Expired - Lifetime EP0468607B2 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4023672 1990-07-23
DE19904023672 DE4023672A1 (de) 1990-07-23 1990-07-23 Fluessigkeitsgekuehlte kokille fuer das stranggiessen von metallen
DE4117052A DE4117052A1 (de) 1990-07-23 1991-05-22 Fluessigkeitsgekuehlte kokille fuer das stranggiessen von metallen
DE4117052 1991-05-22

Publications (3)

Publication Number Publication Date
EP0468607A1 EP0468607A1 (fr) 1992-01-29
EP0468607B1 EP0468607B1 (fr) 1995-04-19
EP0468607B2 true EP0468607B2 (fr) 2001-01-10

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EP91250192A Expired - Lifetime EP0468607B2 (fr) 1990-07-23 1991-07-16 Moule refroidi par liquide pour la coulée continue de métaux

Country Status (7)

Country Link
US (1) US5201909A (fr)
EP (1) EP0468607B2 (fr)
JP (1) JP2978599B2 (fr)
AT (1) ATE121328T1 (fr)
DE (2) DE4117052A1 (fr)
DK (1) DK0468607T3 (fr)
ES (1) ES2071205T5 (fr)

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US5201909A (en) 1993-04-13
ATE121328T1 (de) 1995-05-15
JPH04251637A (ja) 1992-09-08
EP0468607A1 (fr) 1992-01-29
EP0468607B1 (fr) 1995-04-19
JP2978599B2 (ja) 1999-11-15
DE4117052A1 (de) 1992-11-26
ES2071205T3 (es) 1995-06-16
DK0468607T3 (da) 1995-06-26
ES2071205T5 (es) 2001-03-16
DE59105225D1 (de) 1995-05-24

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