Active chatter damping

Aluminum cold rolling mill

Productivity

  • Increase of rolling speeds by 200 m/min. expected 

Efficiency

  • Increased output of >10 %
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Challenges

  • The max. rolling speed of tandem mills is often restricted by self-excited (150-250Hz) or externally exited (750-1000Hz) mill vibrations resulting in strip thickness defects and equipment damage
  • Consequently, the mill speed must be reduced

Solution

  • Application of precise counter vibrations by piezo actuators eliminating mill chatter up to 1000Hz

Technical advantages

  • Reliable increase of rolling speed and output independent from characteristics of excitation
  • Applicable for retro-fit
  • Combination of chatter damping and roll force measurement functionality in one unit