System for making thin metal strip

US4539830A · kind A · utility

Assignee

• BWG BERGWERK—UND WALZWERK—MASCHINENBAU GMBH

Inventors

• Oskar Noe
• Andreas Noe · Kerken, DE
• Rolf Noe · Mülheim, DE

Key dates

• Filing date: Sep 14, 1983
• Grant date: Sep 10, 1985
• Expiry date: Sep 14, 2003

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B21B2015/0071
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

A thin metal strip is made by hot-rolling a strip workpiece, stretch-bend leveling the hot-rolled strip workpiece immediately after hot-rolling it, tensioning the strip workpiece with a predetermined tension while stretch-bend leveling it, and thereafter coiling up the workpiece. In addition the workpiece is rapidly cooled immediately after stretch-bend leveling it and before coiling it up. Thus the workpiece is stretch-bend leveled before it cools so it can be treated while still about 1100.degree. C., at which temperature it is still very plastic. The workpiece can therefore be deformed greatly while under modest tension, so as to produce a very thin product that is very uniform. The tension in the strip merely serves to keep the workpiece looped over as much an arc as possible around the stretch-bending rolls.