Identifying and reducing causes of defects in thin cast strip

B - Operations – Transporting – 22 – D

Patent

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B22D 11/06 (2006.01) B22D 11/16 (2006.01)

Patent

CA 2661976

The method of producing thin cast strip by continuous casting is disclosed. At least two sensors are operationally connected to at least one end of at least one of a pair of casting rolls or of a pair of brushes, to continuously measure at least two force-related parameters during casting. At least two time domain signals corresponding to the measured force-related parameters are generated. The time domain signals are continuously monitored and transformed into corresponding frequency domain spectrums. The frequency domain spectrums are analyzed and composite intensity values are continuously calculated from the intensity levels of at least a portion of the frequency component signals within the frequency spectrums. Casting parameters are adjusted in response to reduce strip defects.

L'invention concerne un procédé de production de bande mince de coulée par coulage en continu. Deux capteurs au moins sont fonctionnellement connectés à au moins une extrémité d'au moins une paire de cylindres de coulée ou une paire de brosses, afin de mesurer en continu au moins deux paramètres relatifs à une force pendant le coulage. Au moins deux signaux de domaine temporel correspondant aux paramètres relatifs à la force mesurée sont générés. Les signaux de domaine temporel sont surveillés en continu et transformés en spectres de domaine fréquenciel correspondant. Lesdits spectres de domaine fréquenciel sont analysés et des valeurs d'intensité composites sont calculées en continu à partir des niveaux d'intensité d'au moins une partie des signaux de composants de fréquence à l'intérieur des spectres fréquenciels. Les paramètres de coulage sont réglés pour répondre à la demande de réduction des défauts de bande.

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