Effect of process parameters on centre lathe of EN8 steel in turning process

Abstract

Good surface finish and better material removal rate are desired for the proper functioning of produced parts. It was seen that the desired surface roughness and material removal rate were not obtained consistently in turning of EN 8 steel applications. These higher values of surface roughness results in rework and increasing cost, hence the main objective is optimization of surface roughness and material removal rate. A general optimization of surface roughness and material removal rate are necessary for the most of manufacturing industry. The surface quality and material removal rate are influenced by cutting speed, feed rate and depth of cut and many other parameters. In this experimental work optimum process parameters and the effect of machining parameters like spindle speed, feed and depth of cut on material removal rate and surface roughness are investigated. An L9 orthogonal array (mixed level design), analysis of variance (ANOVA) and the signal to noise (S/N) ratio are used in this study. Mixed levels of machining parameters are used and experiments are done on conventional lathe machine. EN8 steel material is used for manufacturing of shafts, studs, keys, general purpose axles etc. The most significant parameters for material removal rate are depth of cut, speed and least significant factor for MRR is Feed. For surface roughness speed, depth of cut are the most significant parameters and least significant factor is feed rate.