Ti6Al4V Alaşımının Elektro Erozyon ile İşlemesinde Elektrolitik Cu ve CuBe Takım Elektrotlarının Performansının Karşılaştırılması

Abstract

The most crucial cost element of Electric Discharge Machining (EDM) is the production of tool electrode (shortly electrode). Copper, its alloys, and graphite are the most commonly used electrode materials. Selecting the proper electrode material with low production and material cost, high workpiece material removal rate (MRR) and low tool electrode wear rate (TWR) is key to reducing machining costs with EDM. In this study, the EDM performance of CuBe tool electrodes in the machining of Ti6Al4V alloy was experimentally investigated in comparison to electrolytic Cu (E-Cu) electrodes for different pulse time (ts) and discharge current (I) settings. An increase in MRR and a decrease in TWR and relative wear (RW=TWR/MRR) were observed in machining with CuBe electrodes. However, the high raw material cost of CuBe alloy is an essential drawback in widely using these electrodes in industrial applications. A new performance index formulation is introduced for EDM applications that factor in the production cost of the electrode and its life (i.e., RW). According to our results, the CuBe could be used advantageously as the electrode material at medium current settings. However, at low and high current settings, the low raw material cost of E-Cu makes it more favorable.

Investigation of the machinability of B4C+TiB2/Al 2024 composite manufactured by powder metallurgy with EDM

“…This is in accordance with the physical processing logic of EDM. 18 TWR increased with increasing current value at 48ms and 99ms impact times, but TWR can be negligible in machining with t on = 150 ms in both machinings with Cu and CuBe electrodes. This means that the spark discharge time was chosen unnecessarily long.…”

Dövme ve Eklemeli İmalat Yöntemiyle Üretilmiş Inconel 625 Alaşımların Termal Yöntemle Hızlı Delinmesinde Elektrot Aşınmasının İncelenmesi

“…Düşük ve yüksek akım ayarlarında E-Cu'ın hammadde maliyetinin düşük olduğunu bu durumun onu daha avantajlı hale getirdiğini rapor etmişlerdir. Cu-Be alaşımı, daha yüksek MRR ve daha düşük relatif aşınma (RW -relative wear) değerleri göz önüne alındığında, E-Cu'dan daha iyi performans gösteren bir elektrot malzemesi olarak kabul edilmiştir [32]. Opoz ve arkadaşları [33], hidroksiapatit (HA) tozu katkılı elektro erozyon ile işlenen Ti6Al4V yüzeylerini incelemiştir.…”