Modeling and Optimization of Micro-EDM Operation for Fabrication of Micro Holes

Mishra, Himanshu (2017) Modeling and Optimization of Micro-EDM Operation for Fabrication of Micro Holes. PhD thesis.

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Abstract

Based on the experimental results, an analysis was made to identify the performance of various electrodes during fabrication of micro holes considering Inconel 718 as well as titanium as workpiece materials. It was found that that platinum followed by graphite and copper as electrode material exhibited higher MRR for both the workpiece materials but on the other hand platinum showed higher values of OC, RCL and TA respectively when compared to graphite and copper. The variation of temperature distribution in radial and depth direction with different process parameters has been determined for Inconel 718 and Titanium 5. Theoretical cavity volume was calculated for different process parameter settings for both workpiece materials and it was found that Titanium 5 exhibited higher cavity volume then Inconel 718. This research work offers new insights into the performance of micro-µ-EDM of Inconel 718 and Titanium5 using different electrodes. The optimum process parameters have been identified to determine multi-objective machinability criteria such as MRR, angle of taper of micro-hole, the thickness of recast-layer and overcut for fabrication of micro-holes.

Item Type:Thesis (PhD)
Uncontrolled Keywords:Artificial bee colony optimization; Differential evolution; Inconel 718; Material Removal Rate; Overcut effect; Recast layer thickness; Taper angle
Subjects:Engineering and Technology > Mechanical Engineering > Structural Analysis
Engineering and Technology > Mechanical Engineering > Machine Design
Divisions: Engineering and Technology > Department of Mechanical Engineering
ID Code:8496
Deposited By:Mr. Sanat Kumar Behera
Deposited On:27 Jul 2017 14:23
Last Modified:27 Jul 2017 14:23
Supervisor(s):Maity, K

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