Prediction of workpiece surface roughness using soft computing

Abstract

Surface roughness is widely used as an index of product quality in finish machining processes. This chapter presents a study to model surface roughness in end milling using adaptive neuro-fuzzy inference system (ANFIS).The machining parameters, namely, the spindle speed, feed rate, and depth of cut are used as inputs to model the workpiece surface roughness. The parameters of membership functions (MFs) are tuned using the training data in ANFIS maximizing the modeling accuracy. The trained ANFIS are tested using the set of validation data. The effects of different machining parameters and number of MFs on the prediction accuracy are then studied. The procedure is illustrated using the experimental data of end-milling 6061 aluminum alloy. Finally, results are compared with artificial neural network (ANN) and previously published results. These results show the effectiveness of the proposed approach in modeling the surface roughness.