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Alleviation of regenerative chatter using MRF dampers during milling

Regenerative chatter, a resonant phenomenon where the machine or work piece vibrates during machining process generates waviness which gives rise to poor surface finish in work piece. This also leads to reduction in tool life, reliability and safety of the machining operations. To overcome this, research has been focused on active vibration control. Present work has been investigated in active vibration control and chatter suppression techniques using magneto-rheological fluid where the stiffness of the machine tool has been increased. Experimental investigation has been carried out with different machining conditions and varying input current ranges from 0 to 24 Volts which modifies the magnetic field inside the coil of the damper where chatter mark in the work piece has been suppressed. Surface roughness parameters have also been estimated. Response surface methodology (RSM) has been used to develop mathematical model for surface finish. The results of mathematical model are in agreement with experimental investigations.