Optimization of process parameters to improve Surface finish, MRR and dimensional accuracy while drilling SS410

Abstract

In order to simultaneously optimize machining time, material removal rate (MRR), surface roughness, cylindricity, and dimensional accuracy, this study focuses on optimizing several drilling parameters for SS410 stainless steel, such as spindle speed, feed rate, and drill diameter. A Mannford VL-760 CNC vertical machining center was used for the experiments. Drill sizes of 12, 14, and 16 mm, spindle speeds between 500 and 1500 rpm, and feed rates between 0.03 and 0.15 mm/rev were among the input conditions. The Taguchi L27 orthogonal array is employed in the experimental design. Using Taguchi with Grey Relational Analysis, the best parameters were found to be 1000 rpm, 0.03 mm/rev feed, and a 16 mm drill. With these parameters, the machining time was 297 seconds, the diameter error was 0.1764 mm, the MRR was 15.92 mm³/s, the cylindricity was 0.093 mm, and the surface roughness was 5.785 µm.