Process for suppressing the influence of roll eccentricities

US5647237A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Clemens Jungkunz · Erlangen, DE
• Siegbert Steidl · Herzogenaurach, DE
• Dietrich Wohld · Rauschenberg, DE
• Andre Berghs · Neunkirchen, DE
• Hans-Peter Troendle · Forchheim, DE

Key dates

• Filing date: Jul 28, 1995
• Grant date: Jul 15, 1997
• Expiry date: Jul 28, 2015

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B21B37/66
• WIPO field: Machine tools
• WIPO sector: Mechanical engineering

Abstract

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.