Multi-objective optimization of improved magnetic abrasive finishing of multi-curved surfaces made of SUS202 material

Surface roughness is one of the most significant factors that influence the performance of the loss of power and the wear resistance due to friction in engineering. It is difficult to finish simultaneously multi-curved surfaces by conventional finishing process. Besides, this process has to satisfy the criterion of minimum surface defections, accuracy, and high quality surface finish. This study proposes the improved magnetic abrasive finishing (IMAF) in which a magnetic abrasive finishing process was assisted by ring-magnetic field finishing the multi-curved surfaces made of alloy SUS202 in less processing time. The multi-objective particle swarm optimization (MOPSO) algorithm with the knee point (a better solution) was applied to optimize surface roughness of workpiece. The objective functions of the MOPSO depend on the quality of the surface roughness of finishing materials for both simultaneous surfaces (R (a1), R (a2)), which are determined from experimental approach. Finally, the effectiveness of the process is compared between the optimal results and the experimental data.