Method for joining metal pieces

Details Method for joining metal pieces Method for joining metal pieces

B - Operations, Transporting

21

B

B21B 15/00 (2006.01) B21B 1/26 (2006.01) B23K 13/01 (2006.01) B23K 31/02 (2006.01)

Patent

CA 2255417

According to the invention, the rear end of a preceding metal piece and a front end of a succeeding metal piece are heated, pressed and joined prior to the finishing hot rolling. An alternating magnetic field running through the metal pieces in the thickness direction thereof is generated in an end region on opposed faces of the respective metal pieces to perform heating. The temperature of each metal piece is adjusted to be within a range defined by expressions.

Cette invention consiste à faire chauffer l'extrémité arrière d'une pièce métallique de tête et l'extrémité avant d'une pièce métallique de queue, puis à les presser et à les assembler avant de leur faire subir un laminage de finissage à chaud. Une bobine d'induction, pour réchauffer ces pièces métalliques, crée un champ magnétique alternatif dans le sens de leur épaisseur et au niveau d'une de leurs extrémités ainsi que de leurs faces opposées respectives. On ajuste la température de chaque pièce métallique de manière qu'elle se situe dans une plage prédéfinie.

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