Micro/Nano machining has been classified in to two categories traditional and advanced. In advanced surface finishing , free abrasive is mixed with fluid and allow to flow to perform machining . The main benefit of these methods are surface finishing of complex shapes can be easily achieved and forces acting on free surface by action of abrasive flow can be controlled as well. The magnetorheological(MR) fluid based finishing is an appropriate process for finishing of flat ,3D and freeform surfaces . In case of finishing, the knowledge of forces acting during finishing operations helps to understand the process more because by controlling the forces , surface roughness can be controlled . An investigation has been carried out to study the effect of various factors such as curvature of workpiece , rotational speed of tool and effect of feed rate of workpiece . The normal force seems to dominate over all the forces . A theoretical model has been developed which tells about the normal and tangential forces acting on workpiece , which helps in understanding the interaction of abrasive and workpiece particle in MR fluid based finishing . A comparison has been carried out between theoretical and experimental model which shows that both are in good agreement.

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Magneto Rheological Fluid