AISI 304L paslanmaz çeliğin EDM sondajında ​​orta ve yüksek deşarj enerjilerinin deneysel değerlendirmesi

Öz

Bu çalışma, 1 mm'lik bir pirinç elektrot kullanılarak AISI 304L paslanmaz çeliğin deşarj enerji seviyelerinin EDM sondajı üzerindeki etkisini araştırmaktadır. Deşarj akımı, nabız-on sürenin (ton) ve nabız kapanma süresinin (MRR), yüzey pürüzlülüğü (SR) ve overcut (OC) üzerindeki etkisini sistematik olarak değerlendirmek için üç replikasyonlu bir Taguchi L9 dik dizi kullanıldı, böylece deneysel hatayı en aza indirdi. Deneyler, sabit dielektrik basınç ve kapasitans altında bir JS AD-20 EDM sondaj makinesi üzerinde gerçekleştirildi. Sonuçlar, deşarj akımı ve nabız-on süresinin MRR ve SR'yi etkileyen en önemli parametreler olduğunu gösterirken, darbe süresi ağırlıklı olarak daha derin delik bölümlerinde aşırı etkilenir. Maksimum MRR (0.116 g/dk) için optimum koşul, 12 A, ton 44 μs ve Toff 10 μs'lik bir akımda elde edildi. Varyans analizi (ANOVA), mevcut ve tonun MRR ve SR'deki varyansın% 75'inden fazlasını oluşturduğunu doğruladı. Bu bulgular, paslanmaz çeliklerde EDM sondaj performansını optimize etmek, üretkenliği, yüzey kalitesini ve boyutsal doğruluğu dengelemek için pratik yönergeler sunmaktadır.

Anahtar Kelimeler

• Elektrikli Deşarj Sondaj (EDD)
• Taguchi Tasarımı; ANOVA
• optik profilometri ile yüzey kalitesi

Experimental Evaluation of Medium and High Discharge Energies in EDM Drilling of AISI 304L Stainless Steel

Abstract

This study investigates the impact of discharge energy levels on EDM drilling of AISI 304L stainless steel using a 1 mm copper electrode. A Taguchi L9 orthogonal array with three replications was employed to systematically evaluate the influence of discharge current, pulse-on time (Ton), and pulse-off time (Toff) on material removal rate (MRR), surface roughness (SR), and overcut (OC), thereby minimizing experimental error. Experiments were conducted on a JS AD-20 EDM drilling machine under constant dielectric pressure and capacitance. The results indicate that discharge current and pulse-on time are the most significant parameters affecting MRR and SR, whereas pulse-off time predominantly influences overcut in deeper hole sections. The optimum condition for maximum MRR (14.34 mm3/min) was achieved at a current of 12 A, Tom of 44 μs, and Toff of 18μs. Analysis of variance (ANOVA) confirmed that current and Ton account for more than 75% of the variance in MRR and SR. These findings provide practical guidelines for optimizing EDM drilling performance in stainless steels, balancing productivity, surface quality, and dimensional accuracy.

Keywords

• Electric Discharge Drilling (EDD)
• Taguchi design; ANOVA
• Surface Quality via Optical Profilometry

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