Method and device for changing pairs of working rolls and/or pairs of back-up rolls on roll stands

US7165432B2 · kind B2 · utility

Assignee

• SMS DEMAG LLC · DE

Inventors

• Andreas Berendes · Kirchhundem, DE
• Armin Klapdor · Kirchhundem, DE

Key dates

• Filing date: Apr 17, 2003
• Grant date: Jan 23, 2007
• Expiry date: Jun 13, 2023

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B21B2013/025
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A device for changing pairs of work rolls and/or pairs of backup rolls of roll stands, wherein the rolls are each supported in chocks and are movable out or in by a lower back up roll supported on a track and wheels. The work rolls on the drive side of the roll stand can be coupled to a hydraulic piston-cylinder actuator that is dimensioned in is stroke length for the removal or installation distance and can be uncoupled when it has been withdrawn by the required distance. A roll changing frame can be coupled to the actuator and, when the upper backup roll and the roll changing frame are supported on the lower backup roll, the pair of backup rolls can be moved out or back in. The actuator is coupled to a pusher with connecting arms aligned with ends of the rolls. The actuator is arranged on the drive side of the roll stand and is coupled to the pusher through a piston rod.