Optimizing Machining Parameters of Compound Machining of Inconel718

The compound machining (CM) compounded with electrical discharge machining (EDM) and arc machining is a novel approach to process difficult-to-machine materials especially for the aerospace materials such as Inconel 718.

An exciting material removal rate (MRR) and a small diameter of overcut (DOC) can be received in this approach. A suitable selection of machining parameters plays a key role in CM of machining Inconel 718.

Therefore, a various machining parameters affecting MRR and DOC such as peak current, electrode rotation speed and peak voltage were analyzed. This paper highlights the combined influence of these parameters in CM. A 23factorial with central composite design (CCD) and a total of 20 experiments were conducted in this study.

The mathematical model of objective function between the inconel machining parameters and the dependent variable was obtained by utilizing the response surface method (RSM). Finally, the optimized machining parameters can be acquired in CM of Inconel718

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