Array servo scanning micro EDM of 3D micro cavities

Hao Tong; Yong Li; Futing Yi

doi:10.1117/12.887984

26 May 2011 Array servo scanning micro EDM of 3D micro cavities

Hao Tong, Yong Li, Futing Yi

Proceedings Volume 7997, Fourth International Seminar on Modern Cutting and Measurement Engineering; 79972W (2011) https://doi.org/10.1117/12.887984
Event: Fourth International Seminar on Modern Cutting and Measuring Engineering, 2010, Beijing, China

Abstract

Micro electro discharge machining (Micro EDM) is a non-traditional processing technology with the special advantages of low set-up cost and few cutting force in machining any conductive materials regardless of their hardness. As well known, die-sinking EDM is unsuitable for machining the complex 3D micro cavity less than 1mm due to the high-priced fabrication of 3D microelectrode itself and its serous wear during EDM process. In our former study, a servo scanning 3D micro-EDM (3D SSMEDM) method was put forward, and our experiments showed it was available to fabricate complex 3D micro-cavities. In this study, in order to improve machining efficiency and consistency accuracy for array 3D micro-cavities, an array-servo-scanning 3D micro EDM (3D ASSMEDM) method is presented considering the complementary advantages of the 3D SSMEDM and the array micro electrodes with simple cross-section. During 3D ASSMEDM process, the array cavities designed by CAD / CAM system can be batch-manufactured by servo scanning layer by layer using array-rod-like micro tool electrodes, and the axial wear of the array electrodes is compensated in real time by keeping discharge gap. To verify the effectiveness of the 3D ASSMEDM, the array-triangle-micro cavities (side length 630 μm) are batch-manufactured on P-doped silicon by applying the array-micro-electrodes with square-cross-section fabricated by LIGA process. Our exploratory experiment shows that the 3D ASSMEDM provides a feasible approach for the batch-manufacture of 3D array-micro-cavities of conductive materials.

Citation Download Citation

Hao Tong, Yong Li, and Futing Yi "Array servo scanning micro EDM of 3D micro cavities", Proc. SPIE 7997, Fourth International Seminar on Modern Cutting and Measurement Engineering, 79972W (26 May 2011); https://doi.org/10.1117/12.887984

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