EXPERIMENTAL AND STATISTICAL INVESTIGATION OF SURFACE ROUGHNESS AND VIBRATION DURING FINISH TURNING OF AISI 4140 STEEL WORKPIECE UNDER COOLING METHOD

Abstract

In this study, the surface roughness ([Formula: see text]) and vibration (Vib) during finish turning of AISI 4140 (52[Formula: see text]HRc) steel workpiece under cooling method were investigated as experimental and statistical. Taguchi method was used in statistical investigation of obtained data from the finish turning experiments. As cutting parameters, cutting speed: 160, 200, 240 and 280[Formula: see text]m/min, feed rate: 0.08 and 0.16[Formula: see text]mm/rev, depth of cut: 0.15 and 0.3[Formula: see text]mm, and cooling method: dry/wet were selected for this experimental study. Vibration values during finish turning of steel workpiece were collected online by accelerometers and [Formula: see text] measurement device was used to obtain the [Formula: see text] values. Optimum [Formula: see text] and Vib values were obtained in finish turning of this workpiece. The cutting parameters determined for optimum [Formula: see text] values were obtained as 0.08[Formula: see text]mm/rev of feed rate, 200[Formula: see text]m/min of cutting speed, wet turning process of cooling method, and 0.30[Formula: see text]mm of depth of cut. Optimum Vib values were obtained as 0.08[Formula: see text]mm/rev, 240[Formula: see text]m/min, dry turning and 0.15[Formula: see text]mm. Experimental results for the lowest [Formula: see text] and Vib were found as 0.219[Formula: see text][Formula: see text]m and 0.003463[Formula: see text]gRMS. The predicted values for the [Formula: see text] and the Vib were 0.222[Formula: see text][Formula: see text]m and 0.003328[Formula: see text]gRMS, respectively.