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AssigneeDemag Italimpianti S.p.A.
InventorsFilippo Cattaneo, Roberto Brioschi, Ettore Cernuschi, Paolo Marin, Luciano Calcinati, Maurizio Brignoli
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A rolling mill for rolling pipes on a mandrel (40) is formed by an alignment of rolling units according to the invention, each rolling unit comprises an outer annular structure (2) formed by at least two plate-shaped elements (3) connected rigidly to one another and housing a roll carrier (10) on which the rolling units (27,28,29), supported by respective pivoting lever arms (19,20,21), are disposed. Each roll carrier (10) can be removed transversely from its rolling unit which, for this purpose, is provided with guides (15) in addition to a loading-unloading device (50) on which the removed carrier is placed. The outer annular structure (2) enables the rolling unit and the corresponding rolling mill better to withstand the radial stresses produced during working, the replacement of the rolls of the respective carriers (10) at the same time being simplified by virtue of their lateral movement.
A unit for rolling pipes on a mandrel comprising a closed, substantially annular, outer structure arranged along a rolling axis, a roll carrier housed in said structure, three driven rolls having axes of rotation transverse to said rolling axis, a device mounted on said outer structure and associated with each said roll for regulating a distance of said axis of rotation of each said roll from said rolling axis, wherein said roll carrier is guided for sliding movement between an operative position in which it is locked in the outer structure and an inoperative position in which it is removed therefrom along a direction substantially transverse to said rolling axis, said outer structure for allowing said carrier to pass along said transverse removal direction and means being provided in said rolling unit for effecting said sliding movement.
Dependencies are inferred from the claim text.