Journal
JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY
Volume 27, Issue 1, Pages 177-183Publisher
KOREAN SOC MECHANICAL ENGINEERS
DOI: 10.1007/s12206-012-1215-8
Keywords
End electric discharge milling; Machining performance; Mechanical grinding; Silicon carbide ceramic; Surface integrity
Categories
Funding
- National Natural Science Foundation of China [51205411]
- Shandong Provincial Natural Science Foundation of China [ZR2012EEL15]
- Fundamental Research Funds for the Central Universities [11CX04031A]
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A novel hybrid process that integrates end electric discharge (ED) milling and mechanical grinding is proposed. The process is able to effectively machine a large surface area on SiC ceramic with good surface quality and fine working environmental practice. The polarity, pulse on-time, and peak current are varied to explore their effects on the surface integrity, such as surface morphology, surface roughness, micro-cracks, and composition on the machined surface. The results show that positive tool polarity, short pulse on-time, and low peak current cause a fine surface finish. During the hybrid machining of SiC ceramic, the material is mainly removed by end ED milling at rough machining mode, whereas it is mainly removed by mechanical grinding at finish machining mode. Moreover, the material from the tool can transfer to the workpiece, and a combination reaction takes place during machining.
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