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- 저자 : Arumuga Prabu, V. (검색결과 1 건)
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Kurniawan, Rendi,Thirumalai Kumaran, S.,Arumuga Prabu, V.,Zhen, Yu,Park, Ki Moon,Kwak, Ye In,Mofizul Islam, Md.,Ko, Tae Jo Elsevier 2017 MEASUREMENT -LONDON- Vol.110 No.-
<P><B>Abstract</B></P> <P>An ultrasonic assisted dry electrical discharge machining (US-EDM) process in a gaseous fluid medium was proposed to remove the burrs formed on the exit region of a drilled hole. In preliminary experiment, three different electrode tools (copper, brass, and aluminum) were utilized. In secondary experiment, US-EDM and dry-EDM were compared and performed using the copper tool. US-EDM parameters, such as capacitance (C), pulse-on time (T<SUB>ON</SUB>), and vibration amplitude (A<SUB>p-p</SUB>) were considered as functions of the predicted burr removal rates (BRRs) model. Based on signal to noise (S/N) ratio analysis, machining parameters C=10<SUP>−2</SUP> µF, T<SUB>ON</SUB> =150µs, and A<SUB>p-p</SUB> =4.919µm provided the optimal BRR. The BRR was affected the most by capacitance, followed by pulse-on time and ultrasonic vibration amplitude. The copper tool provided a higher BRR than other tools. US-EDM is considerably effective when T<SUB>ON</SUB> is low and the performance of US-EDM is better than that of Dry-EDM. Scanning electron microscopy (SEM) analysis showed that the US-EDM method created a heat-affected zone surrounding the machined surface of the deburred exit hole in range of 200µm–500µm.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The novelty of a burr removal rate (BRR) model was proposed and validated in this study. </LI> <LI> The influence of the US-EDM process parameters on the BRR value was studied. </LI> <LI> The relationship between the input and output processes was evaluated statistically. </LI> <LI> The optimal machining parameter for the BRR value was validated. </LI> <LI> The comparison between US-EDM and Dry-EDM process was evaluated. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
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