Process and nozzle arrangement for the variable-width...

B - Operations – Transporting – 21 – B

Patent

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Details

B21B 27/10 (2006.01) B21B 45/02 (2006.01)

Patent

CA 2451292

The invention relates to a method for lubricating rolls, in particular for lubricating a rolling nip in rolling stands for rolled strips. According to the invention, said lubrication takes place using an oil-in-water dispersion whilst maintaining both a predetermined blend characteristic and a volumetric flow of the dispersion. The dispersion is prepared in the form of a homogeneous blend in a mixer (1) using adjustable quantities of water and oil. The dispersion is supplied to various spray zones (Zi) for a distribution (Bi) that is variable in width. Said method for roll lubrication can be improved by the allocation of at least one row of nozzles (Di) to each spray zone (Zi), which has a corresponding spray range width (Bi), each nozzle being controlled by at least one relay valve (Si).

L'invention concerne un procédé de lubrification de cylindres, notamment de lubrification de l'emprise, dans des structures de laminage de bandes. Selon l'invention, la lubrification est effectuée avec une dispersion huile dans eau avec maintien d'une caractéristique de mélange prédéfinie et d'un certain flux volumique de la dispersion. Ladite dispersion est préparée sous forme de mélange homogène dans un mélangeur (1) avec des quantités réglables d'eau et d'huile. Ladite dispersion est alimentée dans différentes zones de pulvérisation (Z1) pour une répartition (B1) variable en largeur. Le procédé selon l'invention de lubrification de cylindres peut être amélioré par affectation d'au moins une rangée de tuyères (D1) à chaque zone de pulvérisation (Z1) comportant une largeur de bande de pulvérisation (B1) respective, lesdites rangées de tuyères étant respectivement commandées par au moins une soupape de commutation (S1).

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