Journals / Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi / 2016 / Cilt: 31 - Sayı: 3

The effect of powder mixed and heated dielectric on drilling performance of electric discharge machining (EDM)

Toz katkılı ve ısıtılmış dielektriğin elektro erozyon ile işlemede (EEİ) delik delme performansı üzerine etkisi

Pages
531–544
Publication Date
2022-10-18
DOI
—
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The starch powder addition to the carbon mixed dielectric further improved the surface quality for both rotating and non-rotating electrodes cases at 30?C and 75?C dielectric temperatures.

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, heated silicon oil with added carbon and starch powders was used as dielectric liquid, instead of common hydro-carbon based dielectrics, to obtain better hole surface quality with rotating brass tube electrode in electric discharge machining (EDM).
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Key Findings & Data:Higher workpiece material removal rates (MRR) was obtained in carbon powder added dielectrics than the starch powder added ones for rotating and non-rotating electrodes.
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Conclusion & Impact:The starch powder addition to the carbon mixed dielectric further improved the surface quality for both rotating and non-rotating electrodes cases at 30?C and 75?C dielectric temperatures.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

In this study, heated silicon oil with added carbon and starch powders was used as dielectric liquid, instead of common hydro-carbon based dielectrics, to obtain better hole surface quality with rotating brass tube electrode in electric discharge machining (EDM). The electro-rheometer tests were conducted to find out the suitable temperature and powder concentration values of the electro-rheological (ER) dielectric under the electric field. Higher workpiece material removal rates (MRR) was obtained in carbon powder added dielectrics than the starch powder added ones for rotating and non-rotating electrodes. The optical microscope observations of the machined hole surfaces indicated that the carbon powder added dielectrics reduced the diameter and depth of the discharge craters, thereby resulting in uniformly distributed and round top peaked surface topography. The starch powder addition to the carbon mixed dielectric further improved the surface quality for both rotating and non-rotating electrodes cases at 30?C and 75?C dielectric temperatures.

Özet

Bu çalışmada, Elektro Erozyon ile İşleme (EEİ) yönteminde daha iyi yüzey kalitesinde delikler elde edebilmek için kendi ekseni etrafında dönen ortası delik pirinç elektrotla, hidrokarbon bazlı dielektrikler yerine karbon ve nişasta tozu katkılı ısıtılmış silikon yağı dielektrik sıvı olarak kullanılmıştır. Elektrik alan altındaki Elektro-reolojik (ER) akışkanın optimum sıcaklık ve toz konsantrasyon değerleri elektro-reometre deneyleri yardımıyla tespit edilmiştir. Döner ve dönmeyen elektrotla yapılan işlemelerde karbon tozu katkılı silikon yağı karışımlarında oldukça yüksek işparçası işleme hızı (İİH) değerleri elde edilirken, nişasta tozu katkılı silikon yağı karışımlarında düşük İİH değerleri elde edilmiştir. İşlenmiş delik yüzeylerinin optik mikroskop incelemelerinde, karbon tozu katkılı dielektriklerde işparçası yüzeyindeki kraterlerin çap ve derinlik açısından küçüldüğü böylece sivri uçlu tepelerin eşit şekilde dağıldığı ve yuvarlandığı görülmüştür. Döner ve dönmeyen elektrotla 30?C ve 75?C'lerdeki karbon tozu katkılı dielektriğe nişasta tozu katkısı, yüzey özelliklerini iyileştirmiştir.

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Cite This Article

USLAN, İ., URTEKİN, L., ERDEM, O., ÇOĞUN, C., ÖZERKAN, H. B. (2022). The effect of powder mixed and heated dielectric on drilling performance of electric discharge machining (EDM). Gazi Üniversitesi Mühendislik Mimarlık Fakültesi Dergisi, Cilt: 31 - Sayı: 3, 531–544. https://ajindex.com/articles/523653

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