Title:
RETAINED MANDREL ROLLING MILL FOR SEAMLESS TUBES
Document Type and Number:
WIPO Patent Application WO2007144905
Kind Code:
A8
Abstract:
A rolling mill (10) for processing seamless tubes comprises a plurality of rolling units (U) that are sequentially arranged along a rolling axis (L), each of which is provided with at least three removable working rolls (12), which are each equipped with a groove (12a) for accommodating the tube to be worked the rolling mill comprises a mandrel suitable to be fitted in the tube cavity during the process; the tube is worked by being sequentially passed, with the mandrel (22) fitted in the tube cavity, within the grooves (12a) of the rolls (12) of the rolling units (U) such that the outer diameter of the tube (T) is reduced; in order to have low capital and production costs, each roll (12) of each rolling unit (U) has a fixed nominal diameter.
Inventors:
MARIN PAOLO (IT)
RINALDI PATRIZIO (IT)
PALMA VINCENZO (IT)
BANDINI STEFANO (IT)
RINALDI PATRIZIO (IT)
PALMA VINCENZO (IT)
BANDINI STEFANO (IT)
Application Number:
PCT/IT2006/000438
Publication Date:
February 28, 2008
Filing Date:
June 12, 2006
Export Citation:
Assignee:
SMS DEMAG INNSE S P A (IT)
MARIN PAOLO (IT)
RINALDI PATRIZIO (IT)
PALMA VINCENZO (IT)
BANDINI STEFANO (IT)
MARIN PAOLO (IT)
RINALDI PATRIZIO (IT)
PALMA VINCENZO (IT)
BANDINI STEFANO (IT)
International Classes:
B21B17/04
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