Akademik Veri Yönetim Sistemi
Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji, cilt.10, sa.1, ss.76-84, 2022 (Hakemli Dergi)
Titanium alloys are one of the materials that are difficult to process due to their high strength,
high hardness and low thermal conductivity, wherefore low tool life and surface quality and high
energy consumption are involved in shaping them with traditional manufacturing methods. In
particular, special tool geometries are required for the machining of complex geometry parts
including helical groove, keyseat, micro-holes, etc. with traditional manufacturing methods,
which leads to increases in machining costs. In such cases, non-traditional alternative processing
methods are preferred. In this study, keyseat shaping procedures were performed according to
DIN 6885 standard in the electro (die-sinking) erosion machine for Ti-4Al-6V alloy. As a result
of experiments conducted in copper electrode and Belone EDM F dielectric fluid environment,
the effects of different processing parameters (discharge current, pulse on time and pulse off time)
on measuring accuracy were investigated. In addition, the effects of 3D surface and SEM images
and processing parameters on the accuracy of the coordinate measurement were evaluated. With
the low discharge current, less thermal energy is transferred to the workpiece and smaller particles
are removed from the workpiece, obtained in closer results to the targeted values. The biggest
difference between the targeted keyseat depth, width and length and the measured value was
18.13%, 4.24% and 0.625%, respectively. The results closest to the specified standard keyseat
dimensions were obtained in Ip=9A, Ton=150μs, Toff=120μs processing parameters.