Continous spiral motion and roll bending system for rolling mills
AssigneesDanieli United, Inc., International Rolling Mill Consultants, Inc.
InventorVladimir B. Ginzburg
Life of this patent
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Abstract
A system and method for extending work roll useful life and controlling workpiece profile during thickness gauge reduction of continuous metal strip by axially shifting rotating work rolls during rolling, applying work roll bending forces at locations for maximum leverage and enabling work roll dressing apparatus to be located such that detrimental strip processing conditions of the working zone are not encountering by the dressing apparatus; shortening of work roll length is made possible by the location of the dressing apparatus.
Claims17
A continuous spiral motion system for rolling elongated metal strip between work rolls supported in a rolling mill stand, including a pair of mill housing posts which define a working zone, comprising:
- an upper and a lower work roll, each of a length substantially greater than a width of the metal strip to be rolled and each having bearing means within chocks at each end of each roll,
- a backup roll associated with each work roll,
- shifting means to continuously axially shift the work rolls during rolling of the strip, such that with a rotating motion of the work rolls, a spiral rolling motion of the work rolls, in relation to the rolled strip, is provided,
- bending means for exerting work roll bending force through a centerline of each bearing within said work roll chocks to achieve work roll bending during spiral motion rolling of the metal strip, and
- in-line roll dressing means located outside of the working zone and within said mill housing posts.
A method for rolling elongated metal strip for thickness gauge reduction between mill stand supported upper and lower work rolls having a continuous spiral motion, in relation to the metal strip, comprising:
- providing a rolling mill stand for supporting an upper and lower work roll of a length substantially greater than a width of the metal strip to be rolled, a back up roll associated with each such work roll, and a rotationally supporting chock at each end of such work rolls, said rolling mill stand including mill housing posts which define a working zone,
- shifting each work roll in the direction of its longitudinal axis to impart a spiral motion with respect to the strip during thickness gauge reduction,
- exerting bending forces to said work rolls through said work roll chocks to enable strip profiling,
- providing work roll dressing means outside the working zone and within mill housing posts of the mill stand, and
- dressing said work rolls concurrently with such rolling operation.
Dependencies are inferred from the claim text.