Experimental Investigation Of Electrochemical Grinding And Milling On GH4169

Electrochemical grinding and milling is a hybrid machining of electrochemical machining(ECM) and mechanical grinding and milling, which is based on Electrochemical Grinding(ECG). It combines the high efficiency of ECM and the good accuracy of mechanical machining with no stress, no blur and low tool wear. So, electrochemical grinding and milling is quite suitable for machining difficult-to-machine alloys.This paper focuses on experimental investigation on Electrochemical grinding of GH4169. The main work has been done as follows:(1) Experimental setup was developed for Electrochemical grinding and milling on the basis of the old one, in which the plane traveling of the electrode is achieved by the moving workbench. The spindle system, tool electrode, fixture were designed. And the electrolyte supply device and monitor of the machining current was constructed.(2) Experiments showed that the black residue was the phenomenon of GH4169 machined by ECM. By using Scanning electron microscopy(SEM) and x-ray diffraction(XRD), the black residue on the workpiece was analysised as Nb C.(3) Experimental study of electrochemical grinding and milling was conducted. The influence of experimental parameters(applied voltage, feed rate, temperature and pressure of electrolyte and electrode rotation speed) of processing the plane groove on material move rate(MRR) and overcut was investigated by orthogonal test. The result indicated that feed rate, applied voltage and temperature were the top three important factors. The influence of applied voltage on the maximum feed rate and corresponding MRR, overcut was investigated. The maximum feed rate was 4.02mm/min with voltage of 22 V, temperature of 40?.