Optimization of Micro EDM Drilling Parameters for 316L Stainless Steel Using CuZn Electrode
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Abstract
This paper aims to identify the optimal parameters for drilling 316L stainless steel using micro drilling. The response optimization of experimental parameters is Overcut (DOC) and Taper Angle. (TR). The study applied the fraction 2(n-1) factorial design for specifying the significant parameters and Box-Behnken Design for experimental design. The focused drilling parameters are peak current, gap, drilling speed, and pulse on-off time. As a result, pulse peak current, gap, and pulse on time affect DOC and TR values at = 0.05. The optimal parameter for DOC is at the pulse peak current 1 (steps), the sixth-step gap, and on-time 1 (steps), while the optimal parameter of TR is at the current 3 (steps), the sixth-step gap, and on-time 1 (steps). In sum, the optimal parameter for both DOC and TR is at the current 3 (steps), the fourth-step gap, and on-time 1 (steps). As a result, the experiment showed that the average DOC is 23.78% and the average TR is 1.2436 deg.
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