Rolling mill stand
AssigneeANDRITZ Metals Germany GmbH
InventorsFritz Kopin, Heinrich Schulte
Life of this patent
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Abstract
The object of this invention is a rolling mill stand with one pair of work rolls for a rolling metal strip, with intermediate rolls and back-up rolls. Here, the work rolls are supported at the sides by supporting systems, where a supporting force directed towards the work roll can be applied to each supporting system by means of a force generating device and the supporting system can be moved from an idle position into an operating position. According to the invention, the two work rolls can be replaced by work rolls with a different diameter, where only the supporting systems have to be replaced by supporting systems with supporting rolls of a different diameter, but the intermediate rolls and back-up rolls need not be changed.
Claims20
A rolling mill stand, comprising:
- a frame (34);
- a pair of work rolls (1, 2) for rolling a metal strip (B) with a surface, each work roll (1, 2) having a first diameter;
- a pair of intermediate rolls (3, 4) each defining an axis, each of the intermediate rolls (3, 4) supporting one of the work rolls (1, 2) in a direction substantially perpendicular to the surface of the metal strip (B) and being carried in a respective roll chock (26, 27) that is movable into and out from the frame (34) in the direction of the axis of the respective intermediate roll (3, 4) that it carries;
- a pair of back-up rolls (5, 6), each of the back-up rolls (5, 6) supporting one of the intermediate rolls (3, 4);
- four first supporting systems (30, 31, 32, 33) laterally supporting the respective work rolls (1, 2);
- a force generating device (12c, 13c, 14c, 15c) associated with each supporting system (30, 31, 32, 33), wherein
- a supporting force can be applied to each supporting system (30, 31, 32, 33) via a respective force generating device (12c, 13c, 14c, 15c) providing a supporting force in a directing towards a respective work roll (1, 2),
- each supporting system (30, 31, 32, 33) includes a respective supporting roll (8, 9, 10, 11) having a third diameter and defining an axis, roller bearings (18) and at least one part (12b, 13b, 14b, 15b) of a support beam (12, 13, 14, 15),
- each supporting system (30, 31, 32, 33) is movable from an idle position disposed outside of an area in which the roll chocks (26, 27) of the intermediate rolls (3, 4) move when being pushed in and pulled out, into an operating position in which the respective supporting roll (8, 9, 10, 11) rests on a respective work roll (1, 2),
- each of the two work rolls (1, 2) is configured for replacement by an alternate work roll (1′, 2′) having a second diameter different from the first diameter, and
- to accommodate the alternate work rolls (1′, 2′), the supporting systems (30, 31, 32, 33) are configured for replacement by alternate supporting systems (30′, 31′, 32′, 33′) with alternate supporting rolls (8′, 9′, 10′, 11′) defining an axis and having a fourth diameter different from the third diameter without requiring replacement of intermediate rolls (3, 4) and back-up rolls (5, 6).
Dependencies are inferred from the claim text.