Experimental investigation and FEA simulation of drilling of Inconel 718 alloy

摘要

Drilling of Inconel alloy structures is widely used for aerospace components. Inconel 718, a high strength, thermal resistant Nickel-based alloy, is mainly used in the aircraft industries. Due to the extreme toughness and work hardening characteristics of the alloy, the problem of machining Inconel 718 is one of the ever-increasing magnitudes. This paper discusses the drilling cutting conditions on the machinability of Inconel 718. In this work, an empirical modelling is proposed for predicting the cutting force exerted during the drilling of alloy. The full factorial design is constructed based on the significant drilling process parameters. The cutting force is measured using the dynamometer. The experiments are conducted on high speed radial drilling machine at a constant depth of cut. Using the experimental results the empirical model is developed for prediction of cutting force and verification results are compared with DEFORM 3D simulation software. The validation experiments are well correlated with empirical model and simulation results for prediction cutting force. However the proposed simulation model further to be considering chatter and vibration of the machine tool structure and different drilling tool geomentry.