Sms Siemag Aktiengesellschaft

Sms Schloemann-siemag Aktiengesellschaft

Sms Demag Ag

Other

Ludwig Weingarten

Hans-Peter Richter

Hartmut Pawelski

Jürgen Klöckner

Thorsten Bode

Peter Jollet

Uwe Plociennik

Martin Braun

Meinert Meyer

Hans Georg Hartung

Dieter Daub

Rolf Bünten

Friedhelm Gieseler

Ralf Ohrndorf

Rolf Buenten

Heiner Siebel

Klaus Grimm

The invention relates to a roll stand and a method for rolling a rolled strip. The roll stand () comprises at least one roller housing on the drive side (AS) and one roller housing on the control side (BS) of the roll stand. It also comprises bending devices which are each firmly connected to spars () of the roll stands for treating and bending an upper and/or lower work roller of the roll stand () relative to the roller housings. The bending devices and thus the work rollers are controlled via a control device. To be able to control or regulate the bending devices and/or work rollers more precisely, and thus to improve the quality of the rolled strip after rolling, it is suggested according to the invention that a bending force strain gauge be placed appropriately for direct measurement of the actual bending force affecting the work rollers () via the bending devices ().

Roll stand and method for rolling a rolled strip

The invention relates to a method for lubricating and cooling rollers () and metal strips () on rolling in particular, on cold rolling of metal strips (), wherein, on the inlet side () a minimal amount of pure lubricant () without a high water content is continuously supplied in an online controlled manner with a controlled viscosity and lubricity depending on a number of process data measurements () by means of a physical computer model () and the equivalent process data measurements () from the outlet side () are also used online by the physical computer model ().

Method for lubricating and cooling rollers and metal strips on rolling in particular on cold rolling of metal strips

Rolling stand for producing rolled strip, which includes work rolls, which are supported on backup rolls or intermediate rolls and backup rolls. The work rolls and/or the backup rolls and/or the intermediate rolls can be axially shifted relative to one another. The barrel length (L) of each intermediate roll in a six-high rolling stand or of each work roll in a four-high rolling stand has a cylindrical roll barrel section (Z) and a convexly curved roll barrel section (R(x)), such that the transition point from the cylindrical to the curved roll barrel section, calculated from the cylindrical end of the roll barrel, is in the range of L/2&#x2266;x&#x3c;L. The curved contour, which extends towards opposite ends of the two rolls over a portion of the barrel, is described by a polynomial R(x)=a+ . . . ax, where n&#x2267;5.

Convex roll used for influencing the profile and flatness of a milled strip

In a method of cooling and/or lubricating of rolls and/or rolling stock according to which a cooling medium is applied to the rolls from a plurality of nozzles/nozzle rows, on one hand, and for lubrication, on the other hand, base oil is applied to the rolling stock in front of a roll gap, wherein the nozzles/nozzle rows are adjusted separately and independent from each other the cooling medium is applied to the rolls separately from the base oil, and finally, the base oil without water as a base medium is applied directly to the rolling stock over an entire width thereof in a very small amount in comparison with a conventional amount. To this end, media separating means is arranged between the nozzles/nozzle rows for applying cooling medium to the rolls and the nozzles/nozzle rows for applying base oil to the rolling stock.

Method of and device for cooling and or lubrication

A method of and a rolling mill stand for cold rolling of a metallic rolling stock (), in particular rolling strip () with nozzles for gaseous or liquid treatment media, with which the rolling stock () is displaced under a processing temperature through a roll gap () of a roll pair of upper working roll () and lower working roll () to undergo plastic deformation, and which permits in addition to a rolling stock surface improvement, the lubrication and surface protection of the rolling stock () and the rollers () by a reduction in roll separating, with introduction of deep-chilled media, whereby deep chilled inert gas (), ambient temperature inert gas (), lubricant emulsion (), of admixed base oil, or oil-free, non-residue evaporating hydrocarbons are introduced against the sides () of the working rollers (), and/or the rolling gap (), and/or the rolling stock () in groups of jets from individual rows of nozzles (to) for lubrication, cooling, and for inerting.

Method of and rolling mill stand for cold rolling mill stand for cold rolling of metallic rolling stock in particular rolling strip with nozzles for gaseous or liquid treatment media

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

A roll for a roll stand including a roll shaft with at least one roll ring mounted on the roll shaft, wherein the roll shaft is axially displaceable. The roll stand for rolling a metal strip may be, for example, a two-high stand, a four-high stand or six-high stand. The surfaces of at least two of the inner roll components enclosed by an outer roll ring have contours which are curved in the axial direction, wherein the curved contours are turned relative to each other by 180&deg;.

Roll for a roll stand

A method and apparatus for cooling hot-rolled rolling stock, wherein, for cooling preferably both sides of hot-rolled wide strip, a heat exchange is carried out between the rolling stock and the cooling medium by a pressurized water flow through a sequence of a pressure chamber and a convection chamber, and wherein the rolling stock is cooled by a targeted control of the intensity of the forced convection. The method utilizes a combination of a cooling unit between stands and an additional roll cooling unit in the area of the roll gap at the exit side thereof using a directed pressurized water flow along a circumferential portion of the roll body of each work roll, wherein the cooling unit between stands and the roll cooling unit each operate with contactless sealing means for the surface of the rolling stock and the surface of the roll body.

Growing community of inventors

Düsseldorf, Germany

Ludwig Weingarten