Operating a rolling mill working on seamless tubing

US4404832A · kind A · utility

Assignee

• Mannesmann AG · DE

Inventors

• Gerd Pfeiffer · Poughquag, US
• Horst Biller · Wiesloch, DE
• Manfred Bellmann
• Karl Oberem · Mülheim, DE
• Alfred Lampe · Willich, DE
• Hermann Josef Frentzen · Wittlich, DE

Key dates

• Filing date: Feb 11, 1982
• Grant date: Sep 20, 1983
• Expiry date: Feb 11, 2002

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B21B17/04
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

It was discovered that a rolling mandrel holding a hollow which is rolled in a multistrand mill should be advanced in a particular manner that relates to the stretching the hollow undergoes in the first and second stand, as well as to the speed of the unrolled hollow. A velocity profile has been developed accordingly.