Sms Demag Ag

Sms Siemag Aktiengesellschaft

Sms Group Gmbh

Other

Hartmut Pawelski

Jürgen Seidel

Olaf Norman Jepsen

Johannes Alken

Peter Sudau

Hans-Peter Richter

Arnt Kohlrausch

Juergen Seidel

Daniel Knie

Ludwig Weingarten

Dieter Daub

Jürgen Klöckner

Thorsten Bode

Rolf Bünten

Peter Jollet

Friedhelm Gieseler

Dietrich Mathweis

Heiko Zetzsche

Josef Zeppenfeld

Stefan Tammert

Ralf Ohrndorf

Rolf Buenten

Heiner Siebel

Klaus Grimm

Dirk Täuber

Markus Schellmann

Matthias Vogd

Dirk Taeuber

A method of producing a deforming tool () having a structured embossing surface () which can be brought into contact with a surface of a substrate () for plastic deformation of the substrate, includes the steps of determining a target structure to be produced on the substrate (); geometrically distorting the target structure, such that an embossing image structure is obtained; inverting the embossing image structure, such that the embossing structure for the embossed surface () is obtained; and producing the embossing surface () of the deforming tool () according to the embossing structure.

Surface texturing of deforming tools

A method for rolling rolling stock, wherein a water-based cooling lubricant is applied to the rolling stock and/or to at least one roller which forms a roll gap, at least one water-soluble and tribologically active additive being added to the water-based cooling lubricant prior to application to the rolling stock and/or to the at least one roller.

Method and device for rolling stock and use of a cooling lubricant

A method for lubricating rolls, especially work rolls () of a rolling stand, and rolling stock () passed between the rolls during the rolling operation, in which a lubricant-gas mixture, a lubricant-water-gas mixture, a lubricant-water mixture and/or a grease-medium mixture is applied to the rolls () or the rolling stock () on the run-in side of the rolling stand, is characterized by the fact that the mixture is prepared with at least one mixing device () in the area upstream of the rolling stand.

Method and device for lubricating rollers and a rolled strip of a rolling stand

The invention relates to a cooling device () for cooling a metal strip () after a forming in a cold rolling stand () having at least one nozzle () for spraying a cooling medium () onto the surface of the metal strip (). In order to make such known cooling device more effective and efficient, it is proposed according to the invention to provide a plate (), which in an operating position is arranged parallel to the surface of the metal strip () in the run-out of the cold rolling stand (,) and to arrange the nozzle in the operation position in such a manner that the cooling medium is sprayed at an acute spray angle &#x3b1; into a cavity between the surface of the metal strip and the opposing plate, with a spray direction (R) opposite to the running direction (L) of the metal strip.

Cooling device for cooling a metal strip

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

In a shaping process a metal strip is passed in a rolling direction through shaping rolls and a layer of treatment liquid is applied to a surface of the strip upstream of the shaping rolls. Measurement variables of the liquid on the surface are analyzed by laser-induced, time resolved fluorescent spectroscopic analysis or spectroscopic analysis in the infrared band.

Method and apparatus for analyzing a layer of metal-working liquid

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

The invention relates to a method for controlling a rolling process, in which a metal strip is rolled flat by use of at least one roller. It is known from the prior art that the relative position of a neutral point represents a measure of the instantaneous stability of a rolling process. However, traditional methods for calculating the position of the neutral point do not accurately represent the actual properties of metal and therefore have only limited usefulness for predicting the stability of a rolling process. In order to allow better control of a rolling process for rolling a metal strip with regard to the actual behavior of the metal strip, the invention proposes a new method for calculating the relative position of the neutral point, in which in particular the flat yield stress kand the hydrostatic pressure pat the neutral point are incorporated.

Process and computer program for controlling a rolling process

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 device for measuring the roll gap () between the working rollers () of a cold or warm rolling stand for rolling out narrow or wide strips of metal, especially NE metal strips, by means of roll gap sensors () whose signals are transmitted to the servo-valves of the compressed oil control as a roll gap setpoint value for the piston cylinder units influencing said roll gap (), and used to provide a roller gap measurement which is also suitable for such cases involving the lateral progression of said strip. In order to achieve said aim, the position or travel sensor () is provided in at least one bending cylinder () for the working cylinder () for indirect reference measurement of the roll gap via the positively or negatively acting bending cylinders ().

Device for measuring the roll gap between the working rollers of a cold or warm rolling stand

The invention relates to a method for specifically adjusting the surface structure of rolling stock () during cold rolling in skin pass mills. The aim of the invention is to partially transfer the surface structure of the working roll () onto the rolling stock (). To this end, the change of roughness of the rolling stock () in the rolling process of a single- or multiple-stand, preferably two-stand skin pass mill is calculated in an optimization calculation in which the rolling parameters are varied according to the mill capacity using a tribological model that mathematically describes the friction conditions in the roll gap (). The results obtained are then used to readjust at least a part of the rolling parameters used for calculation.

Growing community of inventors

Ratingen, Germany

Hartmut Pawelski