Title

Schedule-Free Rolling Based on Hot Charging and an Optimized Work Roll Shifting Strategy

Schedule-Free Rolling Based on Hot Charging and an Optimized Work Roll Shifting Strategy

Authorship

PICHLER, RUDOLF; SCHOSTER, HARALD; TICHY, SONJA; SEILINGER, ALOIS; DJUMLIJA, GERLINDE

PICHLER, RUDOLF

I am this author

SCHOSTER, HARALD

I am this author

TICHY, SONJA

I am this author

SEILINGER, ALOIS

I am this author

DJUMLIJA, GERLINDE

I am this author

DOI

10.5151/2594-5297-LA6872

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Abstract

The benefits; of schedule-free rolling can fully be put to use when a high rate of direct or hot charging is used in the hot strip mill. VAI has developed planning systems to reach these high rates. The equipment is layouted and designed based on a powerful hot charging simulation model. For rolling the hot charged slabs as they are delivered from the continuous casting machine, powerful actuators in terms of profile and flatness adjustment are required. Beside the actuator systems, VAI has developed a new strategy for the hot strip mill which allows optimizing the shifiing position over a whole rolling program. Rolling of free schedules with either a high nurnber of strips in the same width or in frequentiy changing strip widths will thus be possible in the future.

The benefits; of schedule-free rolling can fully be put to use when a high rate of direct or hot charging is used in the hot strip mill. VAI has developed planning systems to reach these high rates. The equipment is layouted and designed based on a powerful hot charging simulation model. For rolling the hot charged slabs as they are delivered from the continuous casting machine, powerful actuators in terms of profile and flatness adjustment are required. Beside the actuator systems, VAI has developed a new strategy for the hot strip mill which allows optimizing the shifiing position over a whole rolling program. Rolling of free schedules with either a high nurnber of strips in the same width or in frequentiy changing strip widths will thus be possible in the future.

Keywords

Rolling program; Schedule-free; Hot strip; Work roll shifting; Optimization

Rolling program; Schedule-free; Hot strip; Work roll shifting; Optimization