Method of joining steel sheet bars in hot rolling and a...

B - Operations – Transporting – 21 – B

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

Patent

CA 2067772

In this invention, a back end portion of a preceding sheet bar and a front end of a succeeding sheet bar are cut in a transfer line at an entrance side of a finish rolling mill so that at least both side edge regions of these sheet bars are contacted with each other at a butted contact state thereof and a gap is formed between both end portions and then portions to be joined in the preceding and succeeding sheet bars are locally heated and pushed to join them while gradually enlarging a joining area, whereby the required time is largely reduced as compared with the conventional technique and also it is attempted to miniaturize the heating apparatus and shorten the length of the apparatus.

Selon la présente invention, l'extrémité arrière d'un larget précédent et l'extrémité avant d'un larget suivant sont coupées dans une chaîne-transfert à l'entrée d'un laminoir de finition, de sorte qu'au moins deux bords latéraux de ces largets sont en contact bout à bout, qu'un espace est formé entre les deux extrémités et que les parties des largets qui doivent être réunies sont chauffées et aboutées tout en élargissant la zone d'aboutage, ce qui permet de réduire considérablement le temps nécessaire pour réaliser cette opération par opposition au procédé classique, de miniaturiser le dispositif de chauffage et de réduire la longueur de l'appareil.

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