Abstract:

In this study, the effect of machining parameters on the hole diameter formed on the material surface after chip removal by EDM process using cylindrical copper electrode of Ramor 550 armor steel was investigated. Five levels for discharge current, five levels for pulse offtime and five levels for pulse ontime duration were used as machining parameters. In order to perform the statistical analysis of the results, the experimental design was designed as 18 experiments with the Central Composite Experiment design. İt was determined that the hole diameter closest to the electrode diameter occurred at 3 amps, 225 µs pulse time duration and 23 µs pulse offtime duration, while the largest hole diameter was occurred at 9 amps, 225 µs pulse time duration and 23 µs pulse offtime duration. When the Anova results are analyzed statistically, in the quadratic estimation equations developed for the hole diameter In the linear model, it was determined that the discharge current amount (0.00004<0.05) and the effect of the pulse duration (0.0003122<0.05) were significant, and the margin of error for the hole diameter was calculated as 9.13%.

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