Rolling mill of rotating expander type for tubular bodies with tip-stabilizing system
AssigneeDanieli & C. Officine Meccaniche SpA
InventorsCernuschi Ettore, Fabrizio Marini
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Abstract
A rolling mill of rotating expander type for tubular bodies, comprising: working rollers (1, 2) arranged inclined with respect to the rolling axis; a tip (3) fitted on a beam (4), so that the tubular body is pushed in rotation between the rollers and the tip, and subjected to deformation in order to increase the perimeter; a tip-stabilizing system placed behind said tip, about the beam, and integrated in the rolling mill.
Claims9
A rolling mill of rotating expander type for tubular bodies, comprising:
- first working rollers, provided with rotation axes arranged inclined by a first angle (β) with respect to a rolling axis, and placed at determined heights diametrically opposite to the rolling axis;
- a tip fitted on a beam, said tubular body being pushed so as to rotate between said first rollers and said tip, and subjected to a deformation for increasing the perimeter;
- wherein the rolling mill comprises a tip-stabilizing system placed behind the tip, about the beam, and integrated in the rolling mill, said tip-stabilizing system comprising:
- a) a substantially cylindrical stabilizing ring placed behind said tip within the tubular body;
- and
- b) pressure elements for exerting a pressure on an external surface of said tubular bodies against said stabilizing ring, in a direction essentially orthogonal to said first working rollers.
A method of machining a tubular body characterized in that it uses a rolling mill of rotating expander type comprising:
- first working rollers, provided with rotation axes arranged inclined by a first angle (β) with respect to the rolling axis, and placed at determined heights diametrically opposite to the rolling axis;
- a tip fitted on a beam, said tubular body being pushed so as to rotate between said first rollers and said tip, and subjected to a deformation for increasing the perimeter;
- wherein the rolling mill comprises a tip-stabilizing system placed behind the tip, about the beam, and integrated in the rolling mill, said tip-stabilizing system comprising:
- a) a substantially cylindrical stabilizing ring placed behind said tip within the tubular body;
- and
- b) pressure elements for exerting a pressure on the external surface of said tubular bodies against said stabilizing ring, in a direction essentially orthogonal to said first working rollers.
Dependencies are inferred from the claim text.