23-09-2014, 02:17 PM
Abstracts: Magnetic abrasive finishing (MAF) process is the one in which material is removed in such a way that surface finishing and deburring are performed simultaneously with the applied magnetic field in the finishing zone. The mechanism of super finishing in any finishing process is widely focused by the knowledge of forces involved in the process. This paper reports the findings about the forces acting during MAF and provides correlation between the surface finish and the forces. Magnetic abrasive finishing (MAF) is one of the advanced finishing processes in which work piece is kept between two magnets, and cutting force is controlled by working gap and magnetic field between the two magnets. MAF setup is designed for finishing cylindrical work pieces and it is mounted on lathe machine. The loosely bounded powder is prepared for experimentation by homogeneous mixing of magnetic powder (Fe powder of 300 mesh size (51.4_m)), abrasive powder (Al2O3 of 600 mesh size (25.7_m), and lubricant called servospin-12 oil. To investigate the effects of working gap and circumferential speed on material removal, change in surface finish and percent improvement in surface finish, a series of experiments have been conducted using in-house fabricated setup. Based upon the results, in general, material removal decreases by increasing working gap or decreasing circumferential speed of the work piece. Change in surface finish increases by increasing circumferential speed of the work piece.