Analysis of Micro-Pin Manufacturing Using Inverse Slab Electrical Discharge Milling (ISEDM) Process

Abstract:

Abstract. This paper analyses the technological capabilities of a novel rotary (EDM) electrical discharge machining process for the manufacturing of high aspect ratio cylindrical micro-components. The process is called Inverse Electrical Discharge Grinding (ISEDM). An experimental analysis has been carried out on high speed steel (tool steel Vanadis 23), using a conventional EDM machine and graphite electrode. The effect of pulse off-time, work piece final diameter and machining length on material removal rate, electrode wear ratio, radial accuracy and surface roughness has been quantified. From the study, optimum strategies that involve the use of different EDM regimes for achieving the optimum requirements can be defined. Micro-pins of 0.3 mm diameter with aspect ratio as high as 100:1 have been successfully manufactured.

• Periodical: Key Engineering Materials (Volume 496)
• Pages: 247-252
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.496.247
• Online since: December 2011
• Authors: Ruben Gil, J.A. Sánchez, N. Ortega, S. Plaza, B. Izquierdo, I. Pombo
• Keywords: EDM, Micro-Electrode, Micro-Pin, Tool Manufacturing

References

[1] T. Masuzawa, State of the Art of Micromachining, Annals of the CIRP 49 (2) (2000) pp.473-488.

DOI: 10.1016/s0007-8506(07)63451-9

[2] .G. Chern, Y.E. Wu, J. Cheng, J. Yao, Study on burr formation in micro-machining using micro-tools fabricated by micro-EDM, Precision Engineering 31 (2007) pp.122-129.

DOI: 10.1016/j.precisioneng.2006.04.001

[3] T. Masuzawa, M. Fujino, K. Kobayashi, Wire electro-discharge grinding for micro-machining, Annals of the CIRP 34 (1) (1985) pp.431-435.

DOI: 10.1016/s0007-8506(07)61805-8

[4] E. Uhlman, S. Piltz D. Oberschmidt, Machining of micro rotational parts by wire electrical discharge grinding, Production Engineering Research and Development 2 (2008) pp.227-233.

DOI: 10.1007/s11740-008-0094-4

[5] S.N. Bhavsar, S. Aravindan, P.V. Rao, A critical review of micro-tools fabrication by Focused Ion Beam (FIB) technology, Proc. World Congress on Engineering, Vol. II (2009).

[6] Onikura, O. Onishi, Y. Take, A. Kobayashi, Fabrication of micro carbide tools by ultrasonic vibration grinding, Annals of the CIRP 49 (1) (2000) pp.257-260.

DOI: 10.1016/s0007-8506(07)62941-2

[7] Y. Uno, A. Okada, M. Itoh, T. Yamaguchi, Electrical discharge machining of a groove with a rotating disk electrode, Int. J. Electr. Mach. (IJEM) 1 (1996) 13–20.

DOI: 10.2526/ijem.1.13

[8] E. Uhlmann, S. Piltz, S. Jerzembeck, Micro-machining of cylindrical parts by electrical discharge grinding, Journal of Materials Processing Technology 160 (2005) 15–23.

DOI: 10.1016/j.jmatprotec.2004.02.054