Electrical Discharge Machining (EDM) Characteristics Associated with Electrical Discharge Energy on Machining of Cemented Tungsten Carbide |
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| Authors: | Yan-Cherng Lin Yuan-Feng Chen Ching-Tien Lin Hsinn-Jyh Tzeng |
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| Affiliation: |
a Department of Mechanical Engineering, Nankai Institute of Technology, Nantou County, Taiwan
b Department of Mechanical Engineering, Southern Taiwan University, Tainan, Taiwan |
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| Abstract: | In this investigation, cemented tungsten carbides graded K10 and P10 were machined by electrical discharge machining (EDM) using an electrolytic copper electrode. The machining parameters of EDM were varied to explore the effects of electrical discharge energy on the machining characteristics, such as material removal rate (MRR), electrode wear rate (EWR), and surface roughness. Moreover, the effects of the electrical discharge energy on heat-affected layers, surface cracks and machining debris were also determined. The experimental results show that the MRR increased with the density of the electrical discharge energy; the EWR and diameter of the machining debris were also related to the density of the electrical discharge energy. When the amount of electrical discharge energy was set to a high level, serious surface cracks on the machined surface of the cemented tungsten carbides caused by EDM were evident. |
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| Keywords: | Cemented tungsten carbide Debris Discharge waveform EDM Electrical discharge energy Electrode wear rate Heat-affected zone Machining characteristic Material removal rate Microhardness Peak current Pulse duration Surface roughness Surface crack Topography |
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