Optimization Of EDM Parameters Using Taguchi Method For Hds11
Author(s):
M.MURUGAN, T. Senthil Kumar
Keywords:
EDM, surface roughness (Ra); hardness (HR); material removal rate (MRR); current (I); voltage (V); pulse on(Ton).
Abstract
Metal removal mechanism in Electrical Discharge Machining (EDM) is mainly a thermal phenomenon where thermal energy is produced in plasma channel, and is dissipated though work piece, tool and dielectric. The process is mostly used in situations where machining of very hard materials, intricate parts, complex shapes. The aim of this work is to pursue the influence of three design factors current (I), pulse (V), pulse on(Ton), and pulse off (Toff) which are the most connected parameters to be controlled by the EDM process over machining specifications such as material removal rate (MRR) and characteristics of surface integrity such as average surface roughness (Ra) and the hardness (HR) and also to quantify them. The experiments were carried out as per L9 orthogonal array. Each experiment were performed under different conditions such as Ampere rating, pulse on time and pulse off time. The optimal factor for Surface Roughness, Machining timing, Material Removal rate were obtained when Pulse on time is 2µs, Pulse Off time 6 µs and Amps-8. Particularly output response was mainly depending on the pulse on time for the output Response. Contribution was Surface Roughness-38%, Machining Timing was 52%, Material Removal Rate was 84%. Through the SEM analysis found the areas from where material is removed come up as craters. The depth of crater for small discharge current was less while for a large discharge current it was found to be more.
Article Details
Unique Paper ID: 143697

Publication Volume & Issue: Volume 3, Issue 1

Page(s): 186 - 191
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