Effect of Frequency to Ultrasonic Vibration-Assisted Wire-EDM

Abstract

Wire electrical discharge machine (WEDM) is non-conventional machining process. It can be used for hard cutting material. The study has been presented the combining WEDM with an ultrasonic machine (USM) with brass and tungsten were used as a wire electrode and workpiece respectively. The experiment was carried out with an ultrasonic transducer at 40, 80 kHz. The results were observed with the material removal rate (MRR) and surface roughness (Ra). This research introduced the method of USM setup and described the effected of vibration with the wire electrode on the displacement of amplitude. The result shows that the WEDM process with USM at 40 kHz can be more improved with the material removal rate and surface roughness than that of USM at 80 kHz. This can be explained that higher frequency affected to vibration displacement which makes lower amplitude.

Enhancing Wire-EDM Performance with Zinc-Coated Brass Wire Electrode and Ultrasonic Vibration

“…Table 3 shows physical properties of tungsten carbide and Table 4 illustrates properties of zinccoated brass wire. Parameters considered for the experiment included peak current, pulse duration, pulse off time, wire tension, and frequency of the ultrasonic vibration, with a selected frequency of 40 kHz [22]. The machine conditions are shown in Table 5.…”

“…When vibration is applied to the micro-WEDM process, discharges are more effective with fewer short circuits [21]. Additionally, there exists an optimum relationship between vibration parameters, energy, and feed rate, such that EDM at a constant feed rate can further improve machining efficiency [22,23]. This study focused on the combination of ultrasonic vibration assistance and a zinc-coated brass wire electrode to evaluate their effects on the WEDM process for tungsten.…”