Method and rolling stand for cold rolling rolled stock
AssigneeSMS group GmbH
InventorsMichael Breuer, Kerstin Spill, Markus Fischer
Life of this patent
Estimating the term…
Abstract
The invention relates to a method and a rolling stand (100) for cold rolling rolled stock. The rolling stand (100) comprises at least one upper and one lower backup roll (110-1, 110-2) and also an upper and a lower work roll (120-1, 120-2), which define a roll gap (128). Optionally, a lower and an upper intermediate roll (130-1, 130-2) may also be provided between the work rolls and the backup rolls. In order to ensure an absolutely equal circumferential speed of the upper and lower work rolls when cold rolling in skin-pass mode, it is proposed according to the invention to decouple the upper or lower work roll from its associated drive device.
Claims18
A method for operation of a rolling stand (100) for cold rolling rolled stock (200), wherein the rolling stand comprises at least one upper and one lower backup roll (110-1, 110-2) and also an upper and a lower work roll (120-1, 120-2), which define a roll gap (128), and optionally also an upper and lower intermediate roll (130-1, 130-2), and wherein the rolling stand optionally can be operated in a reducing operation operating mode for reducing the thickness of the rolled stock (200) or in a skin-pass mode;
- characterized in that neither the upper back-up roll (110-1) nor the lower back-up roll (110-2) are driven during the skin-pass operation, and the upper or the lower work roll (120-1, 120-2) is decoupled from its drive unit (124, 124-1, 124-2).
A rolling stand (100) for cold rolling rolled stock, comprising:
- one upper and one lower backup roll (110-1, 110-2);
- one upper and one lower work roll (120-1, 120-2), which are supported between the backup rolls and define a roll gap (128);
- optionally also one upper and one lower intermediate roll (130-1, 130-2) which are supported between the work rolls and backup rolls;
- at least one drive unit (124, 124-1, 124-2) for driving the work rolls;
- and one torque transfer device (120′, 120″) for transferring a torque from the at least one drive unit to the work rolls, wherein the rolling stand is designed as combined reducing roll stand and rerolling stand with the alternative reducing operating modi for the thickness of the rolled stock, or for skin-pass mode;
- characterized in that the torque transfer device (120′, 120″) comprises at least one coupling device (126, 126-1, 126-2) and one associated control unit (127) for decoupling the upper or the lower work roll from the at least one drive unit (124, 124-1, 124-2) during the skin-pass mode during which both back-up rolls (110-1, 110-2) are not being driven.
Dependencies are inferred from the claim text.