Cryogenic Heat Treatment of Electro Discharge Machining Electrode Tooling Investigation of Performance

Yıl 2024, Cilt: 36 Sayı: 1, 447 - 458, 28.03.2024

Mustafa Ay , Savaş Apak

https://doi.org/10.35234/fumbd.1408353

Öz

In this study, the machining performance of the electrode material used in the Electro Discharge Machining (EDM) of Ti-6Al-4V alloy was investigated as a result of cryogenic treatment. Within the scope of the study, electrodes selected from brass material were subjected to cryogenic treatment with a cycle between [Room temperature / -184°C / Room temperature]. In the experiments, the most effective process parameters such as discharge current (Ip), pulse on time (Ton), pulse off time (Toff) and gap voltage (Vg) were selected as variables with brass and cryogenic brass electrodes. As a result of the experiments, the re-solidified layer thickness, material removal rate and taper angle, which determine the product quality, were measured and evaluated. As a result of the cryogenic treatment applied to the electrodes, it was found that positive improvements in EEI performance were obtained. It was concluded that re-solidified layer thickness, material removal rate, tool wear rate and bevel amount ratios are positively affected by discharge current, gap voltage and pulse on time and negatively affected by pulse off time.

Anahtar Kelimeler

Electrical Discharge Machining (EDM), Cryogenic treatment, Ti-6Al-4V

Proje Numarası

FÜBAP TEKF.17.11

Kriyojenik İşlem Uygulanan Elektro Erozyon Elektrot Takımının Performansının Araştırılması

Öz

Bu çalışmada, Ti-6Al-4V alaşımının elektro erozyon ile işleme (EEİ) tezgâhında kullanılan elektrot malzemesinin kriyojenik işlem sonucunda takımın işleme performansı araştırılmıştır. Çalışma kapsamında, pirinç malzemeden seçilen elektrotlar [Oda sıcaklığı / −184°C / Oda sıcaklığı] arasında bir çevrim ile kriyojenik işleme tabi tutulmuştur. Deneylerde pirinç ve kriyojenik pirinç elektrotlarla boşalım akımı (Ip), vurum süresi (Ton), bekleme süresi (Toff) ve boşluk voltaj (Vg) gibi en etkili işlem parametreleri değişken seçilmiştir. Deneyler sonucunda ürün kalitesini belirleyen, tekrar katılaşan katman kalınlığı, malzeme kaldırma oranı ve koniklik açısı ölçümleri yapılarak değerlendirilmiştir. Elektrotlara uygulanan kriyojenik işlem sonucunda, EEİ işlem performansında pozitif iyileşmeler elde edildiği tespit edilmiştir. Tekrar katılaşan katman kalınlığı, malzeme kaldırma oranı ve koniklik miktarı oranlarının Ip, Vg ve Ton pozitif yönde Toff ise negatif yönde etki ettiği sonucuna varılmıştır.

Anahtar Kelimeler

Elektro Erozyon ile İşleme (EEİ), Kriyojenik ısıl işlem, Ti-6Al-4V

Proje Numarası

FÜBAP TEKF.17.11

Kaynakça

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