ABSTRACT

To explore machining parameters for tool wear rate, surface roughness, and material removal rate, Zircaloy-2 was machined with EDM using Cu, CuW and graphite tool. Taguchi L₁₈ Design was used to perform experiments with five independent process parameters (tool material, on-time, off-time, polarity, and current). Response parameters were evaluated and optimized using gray relation analysis and entropy-integrated-gray-VIKOR methods. FESEM was used to observe tool material and oxide layer deposition on machined surface. Maximum material removal rate (1.53 × 10⁻³ mm³/min) was obtained when the graphite tool with negative tool polarity was used. A confirmation test performed on the optimal factor level process parameters gives an error of 1.9%, 6.4%, and 9.8% for TWR, SR, and MRR respectively.

摘要

为了探索刀具磨损率、表面粗糙度和材料去除率的加工参数，使用 Cu、CuW 和石墨刀具通过 EDM 加工 Zircaloy-2。Taguchi L ₁₈ Design 用于执行具有五个独立工艺参数（工具材料、导通时间、关断时间、极性和电流）的实验。使用灰色关联分析和熵积分灰色VIKOR方法评估和优化响应参数。FESEM用于观察加工表面的刀具材料和氧化层沉积。最大材料去除率（1.53 × 10 ^-3 mm ³/min) 是在使用具有负极工具极性的石墨工具时获得的。对最佳因子水平工艺参数进行的确认测试给出的 TWR、SR 和 MRR 的误差分别为 1.9%、6.4% 和 9.8%。