Dummy bar for a continuous casting system and method for the...

B - Operations – Transporting – 22 – D

Patent

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Details

B22D 11/08 (2006.01)

Patent

CA 2719060

The invention relates to a dummy bar (1) for a continuous casting installation for casting a metal strand, including a dummy bar head (2), a transition piece (3) and a link chain (4), wherein the transition piece (3) and/or the link chain (4) are made of a plurality of links (5, 6) that are connected to each other in an articulated manner, and wherein the links (5, 6) can be pivoted relative to each other about a transverse axis (Q) extending perpendicular to the longitudinal axis (L) of the dummy bar (1). In order to particularly prevent internal stresses in the dummy bar when replacing parts of the dummy bar, the invention provides for at least one articulated joint (7) to be configured between two links (5, 6) that are connected to each other in an articulated manner, such that said joint allows a relative pivoting movement of the links (5, 6) about the transverse axis (Q) that is greater than any pivot angle (.alpha.) occurring during the use of the dummy bar (1). In or on the joint (7), a locking element (8) is displaceably arranged in a direction (T) perpendicular to the longitudinal axis (L) of the dummy bar (1) and perpendicular to the transverse axis (Q). The locking element (8) can assume a position (A) in which the pivoting movement of the links (5, 6) is not influenced by the locking element (8), and a position (B) in which the pivoting movement of the links (5, 6) is limited to a predetermined pivot angle in a pivoting direction. The invention further relates to a method of the continuous casting of a metal billet using such a dummy bar.

L'invention concerne un mannequin (1) pour une installation de coulée continue destinée à couler une barre métallique, comprenant une tête de mannequin (2), une pièce de transition (3) et une chaîne articulée (4), dans lequel la pièce de transition (3) et/ou la chaîne articulée (4) se composent d'un certain nombre d'éléments reliés ensemble de manière articulée (5, 6) et dans lequel les éléments (5, 6) peuvent pivoter l'un par rapport à l'autre autour d'un axe transversal (Q) orienté perpendiculairement à l'axe longitudinal (L) du mannequin (1). Afin d'éviter en particulier des contraintes internes dans le mannequin lors du remplacement de parties du mannequin, l'invention prévoit qu'au moins une articulation (7) placée entre deux éléments reliés ensemble de manière articulée (5, 6) soit configurée de manière à autoriser un pivotement relatif des éléments (5, 6) autour de l'axe transversal (Q) qui est supérieur à l'angle de pivotement (a) se produisant dans le mannequin (1) en service, dans lequel un élément de verrouillage (8) est prévu sur ou dans l'articulation (7) qui est monté mobile dans une direction (T) perpendiculaire à l'axe longitudinal (L) du mannequin (1) et perpendiculairement à l'axe transversal (Q), dans lequel l'élément de verrouillage (8) peut prendre une position (A) dans laquelle le pivotement des éléments (5, 6) n'est pas affecté par l'élément de verrouillage (8) et une position (B) dans laquelle le pivotement des éléments (5, 6) est limité à un certain angle de pivotement dans une direction de pivotement. Par ailleurs, l'invention concerne un procédé de coulée continue d'une barre métallique utilisant un tel mannequin.

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