Improvement of Cutting Stability of Cantilever Boring Tool Structure Using Magneto Rheological Fluid Damper

Chatter develops easily during boring operation on a lathe because of low stiffness and damping of the system. The most important parameter is damping associated with the cutting process, which is related to cutting conditions. In this paper a method of utilizing the magnetorheological fluid’s non-linear vibration characteristics for increasing the cutting stability is proposed. The designed damper is a semi-actively controllable fluid damper, which improves cutting stability and suppresses the chatter vibrations. The damper employs a magnetorheological fluid that changes its rheological properties in the presence of a magnetic field. Varying the current flow through the magnetic coil can vary the damping force developed by the magnetorheological fluid damper. The results show that for a particular cutting condition a particular value of magnetic coil current is more effective in chatter suppression.