Sms Demag Ag

Sms Siemag Aktiengesellschaft

Ralf Ohrndorf

Hans-Peter Richter

Hartmut Pawelski

Jürgen Klöckner

Ludwig Weingarten

Thorsten Bode

Armin Klapdor

A rolling mill () for rolling a metal workpiece () that is provided with at least one roll stand () as well as with a conveyor () for the material to be rolled () extending on both sides of the roll stand () for a predetermined length (L) is based on the object that in the area of the longitudinal extent of the conveyor () at least one holder () for a coil () of the metal workpiece () is provided that can be positioned in a first position (A) in which it does not disturb the transport of the metal workpiece () along the conveyor () and that can be positioned in a second position (B) in which the coil () is positioned close to the roll stand () on the conveyor () for unwinding or winding up the coil ().

Rolling mill for rolling metallic material

The invention relates to a method and a device for applying an adjustable tensile-stress distribution, in particular in the edge regions during the cold-rolling of metal strips (), in particular metal foil, in order to reduce the risk of an excessive build-up of tension and cracks at the edges of the strip, which can lead as a negative consequence to cracks in the strip and to a reduction in production, and in order to improve the surface of the strip and its planarity, even for a relatively high strip displacement speed, and also to reduce strip trimming widths. To achieve these aims, at least one or a combination of two of the following measures are implemented: a) separation of lubrication and cooling of the working rolls by lubricating on the run-in side and cooling on the discharge side, b) additional influencing of the strip edges using a hot edge spray', in particular by spraying () rolling oil with differing temperatures in zones, c) use of a special cross-sectional configuration of the working rolls (') in the vicinity of the strip edges, which creates a partial material build-up during the blooming pass, said build-up forming a longer strip edge with subsequent passes, thus counteracting the risk of an excessive build-up of tensile stress.

Method and device for applying an adjustable tensile-stress distribution, in particular in the edge regions of cold-rolled metal strips

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Hilchenbach, Germany

Ralf Ohrndorf