Prediction of surface roughness of Ti-6Al-4V in electrical discharge machining: A regression model
This paper develops a single order mathematical model for correlating the various electrical discharge machining (EDM) parameters and performance characteristics utilizing relevant experimental data as obtained through experimentation. Besides the effect of the peak ampere, pulse on time and p...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
University Malaysia Pahang
2011
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/17153/1/P46_2011.pdf http://irep.iium.edu.my/17153/ http://jmes.ump.edu.my/files/Volume%201/4%20Khan%20et%20al.pdf |
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| Summary: | This paper develops a single order mathematical model for correlating the various
electrical discharge machining (EDM) parameters and performance characteristics
utilizing relevant experimental data as obtained through experimentation. Besides the
effect of the peak ampere, pulse on time and pulse off time on surface roughness has
been investigated. Experiments have been conducted on titanium alloy Ti-6Al-4V with
copper electrode retaining negative polarity as per Design of experiments (DOE).
Response surface methodology (RSM) techniques are utilized to develop the
mathematical model as well as to optimize the EDM parameters. Analysis of Variance
(ANOVA) has been performed for the validity test of fit and adequacy of the proposed
models. It can be seen that increasing pulse on time causes the fine surface until a
certain value and afterward deteriorates in the surface finish. The excellent surface
finish is investigated in this study in the case of the pulse on time below 80 µs. This
result guides to pick the required process outputs and economic industrial machining
conditions optimizing the input factors
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