26. Nano-finishing of Internal Surface of Power Steering Housing Cylinder Using Rotational Magnetorheological Honing Process

The rotational magnetorheological honing (MRH) process is an advanced finishing process. The MRH tool is designed and developed for nano-finishing the internal cylindrical surfaces of ferromagnetic parts. The magnetorheological polishing fluid is used as a finishing medium. The power steering housing cylinder is finished in this work. Rotational motion is given to the cylindrical workpiece through the servomotor using the automatic centering 3-jaw chuck in the opposite direction to the rotational motion of the MRH tool. The relative speed of an active abrasive gets enhanced and continuous shuffling of the active abrasives takes place in this process. The change in surface roughness was found to be 71.87% at the rotational speed of workpiece at 40 rpm which is measured with Mitutoyo Surftest. The scanning electron microscopy is conducted on the finished cylinder internal surface for analysing the surface texture. The surface textures and roughness profiles revealed that the rotational MRH is more capable and productive.