Smoothing rolling mill
AssigneeVallourec (Usines a Tubes de Lorraine-Escaut et Vallourec Reunies)
InventorPierre Peytavin
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Abstract
A smoothing rolling mill having identical frusto-conical smoothing rollers ounted on axes inclined to the axis of displacement of a tube blank passing between the rollers. The axes of the rollers converge in the direction of displacement of the tube blank. The tube blank is rotated and displaced axially between the smoothing rollers in a conventional manner. If desired, the shafts which mount the rollers for rotation can be pre-loaded with respect to the tube blank.
Claims7
In a tube smoothing rolling mill having a back up mandrel within a tube blank to be rolled, means for rotating the tube blank about its longitudinal axis, means for displacing the tube axially, and smoothing rollers positioned symmetrically to the axis of displacement of the tube, the improvement comprising, two smoothing rollers positioned diametrically of the tube and each having a tube engaging surface in the form of a frustum of a cone, said surface of each such roller merging with end surfaces of the roller at zones of curved section, and shaft means mounting said rollers for rotation about axes inclined with respect to the axis of displacement of the tube, said axes converging in the direction of displacement of the tube.
Dependencies are inferred from the claim text.