Roll stand and method for changing work rolls
AssigneeSMS group GmbH
InventorsDietmar Fontayne, Stephan Fischer
Life of this patent
Estimating the term…
Abstract
A roll stand having work rolls mounted therein. The roll stand has at least one upper mounting rail, which is mounted on the drive-side roll stand frame and oriented in a transverse direction to a rolling line running through the roll stand. In order to be able to keep the assembly space in the roll stand over the rolling line free during rolling—except for a roll change—and still change the roll efficiently, the upper mounting rail is configured to be moved into the rolling line and out of the rolling line, starting from the drive-side roll stand frame.
Claims15
A roll stand, comprising:
- a drive-side roll stand frame;
- an operating-side roll stand frame, wherein the drive-side roll stand frame and the operating-side roll stand frame are separated from each other by a rolling line passing through the roll stand;
- an upper, horizontally oriented work roll and a lower, horizontally oriented work roll rotatably supported in chocks on both of the roll stand frames so that the upper, horizontally oriented work roll and the lower, horizontally oriented work roll extend from the operating-side roll stand frame to the drive-side roll stand frame;
- and
- upper mounting rails held only on the drive-side roll stand frame, the upper mounting rails including an upper mounting rail on an incoming side and a further upper mounting rail on an outgoing side to support the upper, horizontally oriented work roll during a roll change, wherein the upper mounting rails extend transversely to the rolling line, wherein the upper mounting rails are horizontally displaceable between a retracted operating state, in which the upper mounting rails do not project into the rolling line, and an extended operating state, in which the upper mounting rails, starting from the drive-side roll stand frame, project into the rolling line at least up to a longitudinal center line of the rolling line, wherein only the drive-side roll stand frame has the displaceable upper mounting rails.
A method for changing horizontally oriented work rolls held in a roll stand during ongoing rolling operations, wherein the roll stand comprises a drive-side roll stand frame and an operating-side roll stand frame, and wherein vertically movable guide rails with upper mounting rails are held only on the drive-side roll stand frame, the upper mounting rails including an upper mounting rail on an incoming side and a further upper mounting rail on an outgoing side, wherein the upper mounting rails are horizontally displaceable between a retracted operating state, in which the upper mounting rails do not project into a rolling line, and an extended operating state, in which the upper mounting rails, starting from the drive-side roll stand frame, project into the rolling line at least up to a longitudinal center line of the rolling line, wherein only the drive-side roll stand frame has the displaceable upper mounting rails, the method for changing the work rolls comprising the steps of:
- vertically moving the guide rails together with the upper mounting rails upward to link up the upper mounting rails with slide parts assigned to an old upper, horizontally oriented work roll;
- and
- vertically moving the guide rails together with the upper mounting rails even more to lift the old upper, horizontally oriented work roll suspended from the upper mounting rails, wherein the upper mounting rails, starting from the drive-side roll stand frame, are horizontally displaced along a change path extending transversely to a rolling direction in a cantilever fashion into the rolling line, while the old upper, horizontally oriented work roll, suspended from the upper mounting rail, is moved out of the roll stand.
A method for changing horizontally oriented work rolls held in a roll stand during ongoing rolling operations, wherein the roll stand comprises a drive-side roll stand frame and an operating-side roll stand frame, and wherein vertically movable guide rails with upper mounting rails are held only on the drive-side roll stand frame, the upper mounting rails including an upper mounting rail on an incoming side and a further upper mounting rail on an outgoing side, wherein the upper mounting rails are horizontally displaceable between a retracted operating state, in which the upper mounting rails do not project into a rolling line, and an extended operating state, in which the upper mounting rails, starting from the drive-side roll stand frame, project into the rolling line at least up to a longitudinal center line of the rolling line, wherein only the drive-side roll stand frame has the displaceable upper mounting rails, wherein the method for changing work rolls comprises the steps of:
- removing an existing upper, horizontally oriented work roll from the roll stand;
- linking up the upper mounting rails with slide parts assigned to a drive-side chock of a new upper, horizontally oriented work roll so that as the new upper, horizontally oriented work roll is horizontally displaced further by way of the upper mounting rails in a direction toward a drive-side part of the roll stand the upper mounting rails are horizontally displaced further out of the rolling line in a direction toward the drive side.
Dependencies are inferred from the claim text.