Roll stand and method for changing work rolls

Patent metadata

Field	Value
Publication number	US-11565292-B2
Application number	US-201615762656-A
Country	US
Kind code	B2
Filing date	Sep 1, 2016
Priority date	Sep 24, 2015
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

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.

First claim

The invention claimed is:

1. 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.

2. The roll stand according to claim 1 , wherein the upper mounting rails each comprise a slideway path, in which a drive-side chock of the upper work roll is slidably guided by slide parts on the incoming side and the outgoing side.

3. The roll stand according to claim 2 , wherein the slide parts are arranged on ends of cantilevers of the drive-side chock of the upper work roll, wherein the cantilevers, starting from the drive-side chock, extend freely outward.

4. The roll stand according to claim 3 , wherein the cantilevers extend in a direction toward the drive-side roll stand frame.

5. The roll stand according to claim 1 , wherein the upper mounting rails are configured to be horizontally telescopable.

6. The roll stand according to claim 1 , further comprising guide rails held in stationary fashion in a horizontal direction, the mounting rails being movably supported in the guide rails in the horizontal direction.

7. The roll stand according to claim 6 , further comprising vertical shifting drives for raising and lowering the guide rails, the vertical shifting drives being supported on the drive-side roll stand frame.

8. The roll stand according to claim 7 , wherein the vertical shifting drives are configured as balancing cylinders for balancing an upper backup roll; and the guide rails are arranged on free ends of the balancing cylinders not supported on the roll stand.

9. 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.

10. The method according to claim 9 , including supporting the roll stand, the old upper work roll of a roll pair during removal from the roll stand at an end facing the drive-side roll stand frame by the shifted or outwardly-moved upper mounting rail until a drive-side chock of the old upper work roll is set down onto a lower support device located on the operating-side of the rolling line so that the old upper work roll is detachable from the upper mounting rail.

11. The method according to claim 10 , including setting the drive-side chock onto at least one support pin that is extendable from a drive-side chock of a lower work roll.

12. The method according to claim 9 , including using a support roller balancing cylinder supported on the drive-side roll stand frame of the roll stand for vertically displacing one of the plurality of guide rails together with the upper mounting rail and which is used to support the upper work roll.

13. 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.

14. The method according to claim 13 , including lowering the guide rails together with the upper mounting rails, once the new upper work roll is held by the drive-side chock in the drive-side roll stand frame, to eliminate contact between the slide parts of an upper chock and the upper mounting rails.

15. The method according to claim 13 , including using a support roller balancing cylinder supported on the drive-side roll stand frame of the roll stand for vertically displacing one of the plurality of guide rails together with the upper mounting rail and which is used to support the upper work roll.

Assignees

• Sms Group Gmbh

Inventors

• Fontayne Dietmar
• Fischer Stephan

Classifications

• B21B31/106 Primary

  Vertical displacement of rolls or roll chocks during horizontal roll changing · CPC title

• B21B31/12

  by vertically displacing · CPC title

• B21B31/203

  Balancing rolls · CPC title