OPTIMIZING FEED AND RADIAL FORCES IN CNC MACHINING OF P-20 TOOL STEEL THROUGH TAGUCHI'S PARAMETER DESIGN APPROACH

Abstract

The objective of the paper is to obtain an optimal setting of CNC machining process parameters, cutting speed, feed rate resulting in optimal values of the feed and radial forces while machining P – 20 tool steel with TiN coated tungsten carbide inserts. The effects of the selected process parameters on the chosen characteristics and the subsequent optimal settings of the parameters have been accomplished using Taguchi’s parameter design approach.

The process parameters considered are – Cutting speed 3000rpm, 2500rpm and 2000rpm. Feed rate 200mm/min, 300mm/min and 400mm/min and depth of cut is 0.2mm, 0.3mm and 0.4mm.The effect of these parameters on the feed force, radial force are considered for analysis. The analysis of the results shows that the optimal settings for low values of feed and radial forces are high cutting speed, low feed rate and depth of cut. The thrust force and feed force are also taken experimentally using dynamometer for above Cutting speeds, feed rate and depth of cut. The optimal values for speed, feed rate and depth of cut are taken using Taguchi technique in Minitab software.