Active chatter damping

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