Method of and apparatus for guiding an incompletely...

B - Operations – Transporting – 22 – D

Patent

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B22D 11/12 (2006.01)

Patent

CA 2659989

The invention relates to a strand guiding device and a method for guiding a metal strip, in particular a metal strip that has not yet solidified right through, in a continuous casting installation. Known strand guiding devices comprise a segment frame and at least one pair of opposing guiding rollers, between which the metal strip is guided. At least one of the guiding rollers takes the form of at least two part-rollers 122, 124 arranged next to each other. The part-rollers are mounted on the segment frame 110 by means of two outer bearings 132, 134 and at least one common intermediate bearing 133. To provide at least partial compensation for the segment frame 110 springing up or bending, caused indirectly by the ferrostatic pressure in the interior of the metal strip that has not yet solidified right through and occurring in particular in the region of the intermediate bearing 133 during the transport of the metal strip between the guiding rollers 120, three different means are proposed according to the invention, means which can also be used in combination with one another. These means are a bowing of the intermediately mounted guiding roller and/or a more yielding form of the outer bearings 132, 134 in comparison with the intermediate bearing 133 and/or a greater distance A1 between the segment frame 110 and the centre axis M of the part-rollers 122, 124 in the case of the intermediate bearing 133 in comparison with the outer bearings 132, 134.

L'invention concerne un dispositif de guidage de barre et un procédé de guidage d'un feuillard métallique, en particulier d'un feuillard métallique qui n'a pas encore durci à cAEur, dans une installation de coulée continue. Les dispositifs connus de guidage de barre comprennent un cadre segmenté et au moins deux galets de guidage mutuellement opposés entre lesquels le feuillard métallique est guidé. Au moins un des galets de guidage est configuré en forme d'au moins deux galets partiels (122, 124) disposés l'un à côté de l'autre. Les galets partiels sont montés sur le cadre segmenté (110) par deux paliers extérieurs (132, 134) et au moins un palier intermédiaire commun (133). Pour compenser au moins en partie la déformation élastique ou la flexion du cadre segmenté (110) provoquée indirectement par la pression ferrostatique qui règne à l'intérieur du feuillard métallique qui n'a pas encore durci à cAEur, en particulier dans la zone du palier intermédiaire (133) lors du transport du feuillard métallique entre deux galets de guidage (120), l'invention propose trois moyens différents qui peuvent également être utilisés en combinaison les uns avec les autres. Ces moyens sont un bombage du galet de guidage intermédiaire et/ou une configuration des paliers extérieurs (132, 134) plus déformable que celle du palier intermédiaire (133) et/ou une distance A1 entre le cadre segmenté (110) et l'axe central M des galets partiels (122, 124) plus grande dans le palier intermédiaire (133) que dans les paliers extérieurs (132, 134).

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