TAILIEUCHUNG - Performance analysis of iso current pulse generator

(BQ) In this research, an iso duration current pulse generator has been proposed to achieve good surface finish. An experimental performance evaluation has been conducted with conventional transistor pulse train generator and modified iso current pulse generator by Taguchi L27 orthogonal array design. The machining characteristics have been evaluated for both the pulse generators. It is found the that modified iso duration current pulse generator has produced better surface quality with higher material removal rate than the conventional transistor pulse train generator. | archives of civil and mechanical engineering 14 (2014) 383–390 Available online at ScienceDirect journal homepage: Original Research Article Performance analysis of iso current pulse generator on machining characteristics in EDM process T. Muthuramalingam a,*, B. Mohan b,1 a Department of Production Technology, MIT Campus, Chromepet, Anna University, Chennai, Tamilnadu 600044, India b Department of Mechanical Engineering, CEG Campus, Guindy, Anna University, Chennai, Tamilnadu 600025, India article info abstract Article history: Extremely hard materials can be easily machined by Electrical Discharge Machining process Received 28 June 2013 due to its thermal erosion nature. In this process, the amount of material removed is directly Accepted 6 October 2013 proportional to the discharge current. Due to the stochastic nature of the thermal erosion Available online 11 October 2013 process, the discharge current is varied for every applied electrical pulse. It results in Keywords: The volume of the crater is determined by the discharging energy. The variation in the different levels of material removal over the material surface during machining process. EDM discharging energy produces high surface roughness, which is influenced by discharge Erosion current. A constant duration discharge current is needed throughout the process to produce MRR better surface quality. In this research, an iso duration current pulse generator has been Roughness proposed to achieve good surface finish. An experimental performance evaluation has been Pulse conducted with conventional transistor pulse train generator and modified iso current pulse generator by Taguchi L27 orthogonal array design. The machining characteristics have been evaluated for both the pulse generators. It is found the that modified iso duration current pulse generator has produced better surface quality with higher material removal rate .

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