Abstract
Electro-discharge diamond face grinding (EDDFG), a hybrid machining process comprising diamond face grinding (DFG) and electro-discharge machining (EDM), has been developed for machining of electrically conductive difficult-to-machine very hard materials. The process employs simultaneous synergetic interactive effect of abrasion action and electro-discharge action. A face grinding setup for electro-discharge diamond grinding (EDDG) process is developed. The effect of wheel RPM, current, pulse on-time and duty factor on material removal rate (MRR), wheel wear rate (WWR) and average surface roughness (Ra), while machining high speed steel (HSS) workpiece, are investigated. It is observed that the MRR increase with increasing wheel RPM, current and pulse on-time, while it decreases with an increase in duty factor. The most significant factor affecting the EDDFG robustness has been identified as pulse on-time and duty factor.
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