Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7216539 | Journal of King Saud University - Engineering Sciences | 2018 | 11 Pages |
Abstract
In this research, Wire Electrical Discharge Machining (WEDM) of Nimonic-75 alloy is presented to explore the significance of machining parameters such as pulse-on time, servo voltage, pulse-off time, peak current, wire feed rate and cable tension on performance features such as surface roughness (SR), overcut and metal removal rate (MRR). Experiments are performed according to Taguchi's L27 orthogonal collection. Principal component analysis is utilized for the optimization of machining parameters. The optimal settings of the machining variables obtained are pulse-on time 110â¯Âµs, pulse-off time 51â¯Âµs, servo voltage 40â¯volts, peak current 230â¯Amp., wire feed rate 5â¯m/min and cable tension 8â¯gram. Results of Analysis of Variance (ANOVA) reveal that pulse-on time (contributing 52.90%) is the major influencing factor affecting the performance characteristics. Results of the confirmation experiments indicate that the optimal machining parameters improved the value of composite primary component (CPC) from 1.2013 to 1.2443 for the multiple responses. Scanning Electron Microscopic (SEM) analysis is carried out to examine the microstructure of the machined surfaces.
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Authors
Sachin Ashok Sonawane, M.L. Kulkarni,