Siemens Aktiengesellschaft

Siemens Aktiengesselschaft

Siegbert Steidl

Dietrich Wohld

Clemens Jungkunz

Ulrich Lettau

Wilfried Tautz

Andre Berghs

Hans-Peter Troendle

Gunter Wagner

Herbert Muller

Klaus Berger

Peter Sopp

Peter Drucke

Anton Stribersky

Bernhard Rath

Werner Niemeyer-Stein

Matthias Mueller

A master control system for a rolling mill, especially a mill train, having at least one rolling stand driven by means of a drive system, and the master control system having an automation device for the open-loop and/or closed-loop control of the rolling stand. The master control system also has a commissioning computer for the commissioning of the drive system and of the automation device.

Master control system for a rolling mill

A method and a device for rolling a metal strip () in a rolling train, the rolling train having at least two rolling stands, the metal strip () having at least two partial areas () of different thicknesses, which are connected to one another via a wedge-shaped or approximately wedge-shaped transition piece (), and the rolling velocity of a rolling stand, during the rolling of the wedge-shaped or approximately wedge-shaped transition piece (), being set as a function of the forward slip of the rolling stand and of the temperature of the metal strip.

Method and device for rolling a foil of varying thicknesses

Process and device for regulating the earth-related inclination of

A device is provided for regulating the thickness of rolling stock in a roller stand. The device includes a control device that controls the roller adjustment of the roller stand as a function of the deviation between a reference thickness value (h*) and an estimated value (h') for the thickness of the rolling stock exiting from the roller stand; a model simulating the rolling process in the roller stand, the model calculating the estimated value (h') on the basis of roller technology parameters and measured values; a thickness measurement device that measures the thickness of the rolling stock after its exit from the roller stand with a measurement delay (T.sub.L) providing a measured thickness value (h.sub.L); a delay device for delaying the estimated value (h') determined by the model by at least approximately the amount of the measurement delay (T.sub.L); a correction device generating a correction value (k) as a function of a deviation (.DELTA.h.sub.L) between the measured thickness value (h.sub.L) and a delayed estimated value (h'.sub.L), the correction value (k) correcting the estimated value (h') provided by the model; a controllable switching device enabling the generation of the correction value (k) to be stopped in time periods during which the thickness measurement device provides no measured thickness values (h.sub.L) or no usable measured thickness values; and a holding device making available during the time periods the correction value (k) last generated for correction of the estimated value (h') provided by the model prior to the generation of the correction value (k) being stopped.

Device for regulating the thickness of rolling stock

To suppress the influence of roll eccentricities on a feedback control of a rolling-stock thickness in the thickness control, it is generally known to provide an insensitive dead zone for signal fluctuations caused by the roll eccentricities, and for the zone width of this insensitive dead zone to be varied relative to the magnitude of the signal fluctuations. To prevent actual thickness fluctuation in the rolling stock from leading to a widening of the dead zone, it is provided for the signal fluctuations drawn upon to vary the zone width (x) to be filtered by one or more band-pass filters (26, 27), whose mid-frequencies correspond to the fundamental frequency (.omega.) and, in some instances, to the first or further harmonic component frequencies (2.omega.) of the roll eccentricities (.DELTA.R).

Method for suppressing the influence of roll eccentricities on a control

In a previous process, the influence of roll eccentricities on the output thickness of the rolled material in a roll stand is suppressed by simulating the output signal of an oscillator and supplying this value to a position or thickness control for the roll stand, where the frequency of the output signal is set according to the roll rotation speed. In the process according to the invention, the amplitude and phase of the output signal are set so that the exit thickness of the rolled material is measured with a measuring delay in relation to the thickness reduction in the roll gap. A difference signal is generated from the delayed roll screw-down signal and a measured thickness signal multiplied by the sum of one and the quotient of the rigidity of the rolled material and the roll stand. The output signal of the oscillator is corrected according to the difference between the output signal and the difference signal. The output signal is phase shifted by the amount of measurement delay for a forward slip.

Process for suppressing the influence of roll eccentricities

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Herzogenaurach, Germany

Siegbert Steidl