Fundamental experimental research on electrochemical machining cooling hole of nickle-based superalloy
Film cooling holes were obtained by electrochemical machining using Inconel718 nickel-based super-al loy which is commonly used for turbine blade of aero-engine.In order to explore the effect of machining parameters on processing accuracy and efficiency,orthogonal tests and single factor experiments were conducted.The parameters of the cooling hole were optimized by orthogonal experiment.The effects of the inlet pressure of electrolyte,processing voltage and electrode feed rate on the single side gap and MRR were analyzed,obtaining an optimal process.The results showed that:the effect of the electrode feed rate on the side gap is the largest while the effect of the inlet pressure on the side gap is the smallest.The effect of the processing voltage on the corrosion rate is the biggest,and the feed rate has the least effect on the removal rate.The optimal parameters were obtained:the machining accuracy and machining efficiency of cooling holes are optimal at the inlet pressure of 0.4 MPa,processing voltage of 9 V and electrode feed rate of 0.42 mm/min.
electrochemical machiningorthogonal test designmachining parametersprocessing accuracyprocessing efficiency
NETL
NSTL
万方数据
维普
