1. Micro sinking electro-discharge machining of complex 3D micro-cavity using in-situ milled graphite microform electrode.
- Author
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Chen, Xiang, Wang, Zhenlong, Wang, Yukui, and Chi, Guanxin
- Subjects
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METHANOTROPHS , *SIMPLE machines , *ELECTRIC metal-cutting , *GRAPHITE , *ELECTRODES , *SURFACE roughness , *MICROGRAPHICS - Abstract
This paper develops a new combined technology to fabricate complex 3D microstructure based on micro milling and micro sinking electro-discharge machining (micro-SEDM). Graphite microform electrode is in-situ prepared by micro milling and subsequently used for micro-SEDM, integrating the advantages of two processes. Material removal rate (MRR) and electrode wear ratio (EWR) are experimentally investigated to determine proper parameters for different micro-SEDM performances. Three different machining strategies including single, double and treble micro-SEDM are adopted to fabricate 3D microstructure. The surface roughness, size accuracy, machining duration and cost of micro-cavities, and electrode wear under different strategies have been compared. The results show that treble micro-SEDM produces superior surface quality with 0.83 μm Ra and size accuracy with ≤ 28.05 μm tolerance. The proposed method broadens the machining flexibility and capability of micro-fabrication techniques. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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