Experimental investigation on thermal assisted machining process of mild steel using CBN tools

Processing such a material with conventional machining methods can be very costly as this material greatly affects tool life. Thus, hot condition machining can be used to reduce tool wear, power consumption and improve surface quality. Here, the workpiece temperature is raised several hundred or even thousands of degrees Celsius above the ambient temperature to reduce material shear. Various heating methods have been tried, such as mass heating using a stove, torch flame is used for central heating, plasma, induction and electric resistance at the operating interface of the device. In this study an experimental works was carried out to optimized the performance charactertics Spindle speed Rpm, Feed mm/rev, depth of cut mm, Sample heating temperature 200/250/300 degree simultaneously in hot turning process, the experiments were conducted on mold steel i.e. HPM38 using CBN tools based on the Taguchi L9 orthogonal array. The sample is heated using an oxygen-acetylene gas flame, which is more efficient than other heating methods used in hot working. Anova was used to obtain the influence of each parameter to performance and it was reported that sample temp had a significant effect on performance compared to other control parameters. Optimum parameters is achieved with a spindle speed of 300 rpm, feed rate 0.1 mm / rev, depth of cut 0.2 mm, and a temp of 200 degrees to maximize material transfer speed and minimize surface roughness and tool wear. Power consumption. Thus, the strength of the Taguchi method lies in the integration of statistical methods into the engineering process.