Method to guide the strip between the stands in a rolling...

Details Method to guide the strip between the stands in a rolling... Method to guide the strip between the stands in a rolling...

E - Fixed Constructions

21

B

E21B 31/14 (2006.01) B21B 39/08 (2006.01) B21B 39/14 (2006.01) B21B 41/10 (2006.01)

Patent

CA 2203088

Method to guide the strip between the stands in a rolling mill finishing train to roll thin strips of a final thickness in the order of 1.2 mm and less, the inter-stand device including at least a guide device arranged at the outlet of the upstream stand (11a), a looper unit (15) comprising at least a looper roller (20) and a guide device arranged at the inlet to the downstream stand (11b), the looper roller (20) having at least a lowered position at the step before the leading end of the strip enters and a plurality of raised positions, while the strip is passing through, to form the desired loop, the looper roller (20), at least when it is in the lowered position before the strip enters, being made to rotate at a tangential speed at least equal to the speed at which the strip is fed between the stands. Inter-stand device to achieve the method as described above, wherein the looper unit (15) comprises empowered drive means (21) associated with the looper roller (20) at least when the looper roller (20) is in its lowered position, the drive means (21) being structured to make the looper roller (20) rotate, before the strip enters, at a tangential speed at least equal to the speed at which the strip is fed between the stands.

Cette invention concerne une méthode de guidage du feuillard entre les cages de train finisseur servant à laminer des feuillards étroits à une épaisseur finale de l'ordre de 1,2 mm ou moins, le dispositif inter-cages comprenant au moins un dispositif de guidage à la sortie de la cage amont (11a), une unité de serpentage (15) comportant au moins un cylindre de serpentage (20) et dispositif de guidage disposé à l'entrée de la cage aval (11b), le cylindre de serpentage (20) pouvant occuper au moins une position abaissée au moment où le feuillard pénètre dans la cage et plusieurs positions relevées pendant le passage du feuillard dans l'unité de serpentage, le cylindre de serpentage (20) étant entraîné en rotation, au moins dans sa position abaissée, à une vitesse tangentielle au moins égale à la vitesse de défilement du feuillard entre les cages. Le dispositif inter-cages permettant de réaliser la méthode objet de l'invention décrite ci-haut comprend une unité de serpentage (15) comportant un moyen d'entraînement motorisé (21) qui fait tourner le cylindre de serpentage (20), au moins lorsqu'il se trouve en position abaissée et avant que le feuillard y pénètre, à une vitesse tangentielle au moins égale à la vitesse de défilement du feuillard entre les cages.

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