Magnetorheological abrasive flow nano-finishing (RR-MRAFNF) machine

An apparatus, comprising:

• an upper cylinder;
• an upper piston coupled with the upper cylinder;
• a lower cylinder;
• a lower piston coupled with the lower cylinder;
• a first motor configured to slide the upper piston along an inner surface of the upper cylinder via an upper slider crank mechanism and slide the lower piston along an inner surface of the lower cylinder via a lower slider crank mechanism;
• a magnet fixture positioned between the upper cylinder and the lower cylinder, comprising at least one permanent magnet, and having a shape of a ring and a hole in the ring configured to receive a workpiece therein;
• and
• a second motor configured to rotate the magnet fixture so as to rotate the at least one permanent magnet,
• wherein the upper piston, the upper cylinder, the magnet fixture, the lower piston and the lower cylinder define a space that is configured to receive a magnetorheological (MR) fluid comprising ferromagnetic particles, abrasive particles and a carrier fluid, and
• the upper piston, the upper cylinder, the magnet fixture, the lower piston and the lower cylinder are arranged such that as the MR fluid flows through the hole while being in direct contact with the workpiece within the hole, the ferromagnetic particles in the MR fluid move rotationally and reciprocally,
• wherein the upper slider crank mechanism comprises an upper crank and an upper connecting rod coupled with the upper crank and connected to the upper piston, and
• wherein the lower slider crank mechanism comprises a lower crank and a lower connecting rod coupled with the lower crank and connected to the lower piston;
• a middle pulley configured to be rotated by the first motor;
• an upper V-belt coupled with the middle pulley;
• an upper shaft coupled with the upper V-belt and the upper crank and configured to be rotated by the middle pulley via the upper V-belt so as to rotate the upper crank;
• a lower V-belt coupled with the middle pulley;
• and
• a lower shaft coupled with the lower V-belt and the lower crank and configured to be rotated by the middle pulley via the lower V-belt so as to rotate the lower crank.