Fabrication of Micropins Using Micro Turning Tools

Abstract:

Article Preview

The turning of straight micropins with a diameter smaller than 10 µm, which has not been reported so far, was carried out using micro turning tools made of cemented tungsten carbide. Tools of 50 µm diameter were fabricated by electrical discharge machining, which is suitable for fabricating micro cutting tools because it can deal with hard materials and carry out micromachining. A turning machine designed especially for micro turning tools was used in the experiments. A brass workpiece was turned using a tool with a length of cut of 100 µm at a feed speed of 3.0 µm/s, feed per revolution of 0.06 µm and depth of cut of 10–11 µm. As a result, a straight micropin of 7.5 µm diameter and 80 µm length was successfully turned. Furthermore, turning was also performed using a tool with a length of cut of 50 µm at a feed speed of 3.0 µm/s, feed per revolution of 0.06 µm and depth of cut of 8.5–20 µm to fabricate a straight micropin of 3 µm diameter and 30 µm length. This micropin is the pin with the smallest ever diameter fabricated by turning, to the best of our knowledge, indicating the possibility of further minimization of the machinable size in turning. Turning properties were also investigated to determine the maximum depth of cut and feed speed that can be employed without tool breakage.

Info:

Periodical:

Key Engineering Materials (Volumes 523-524)

Edited by:

Tojiro Aoyama, Hideki Aoyama, Atsushi Matsubara, Hayato Yoshioka and Libo Zhou

Pages:

76-80

Citation:

T. Furukawa et al., "Fabrication of Micropins Using Micro Turning Tools", Key Engineering Materials, Vols. 523-524, pp. 76-80, 2012

Online since:

November 2012

Export:

Price:

$38.00

[1] K. Egashira, K. Mizutani, Ultrasonic vibration drilling of microholes in glass, CIRP Annals, 51 (2002) 339–342.

DOI: https://doi.org/10.1016/s0007-8506(07)61531-5

[2] K. Egashira, K. Mizutani, Milling using ultra-small diameter ball end mills fabricated by electrical discharge machining, Journal of the Japan Society for Precision Engineering, 69 (2003) 1449–1453. (in Japanese).

DOI: https://doi.org/10.2493/jjspe.69.1449

[3] Z. Lu, T. Yoneyama, Micro cutting in the micro lathe turning system, International Journal of Machine Tools and Manufacture, 39 (1999) 1171–1183.

DOI: https://doi.org/10.1016/s0890-6955(98)00092-3

[4] Y. Yamagata, T. Higuchi, Three-dimensional micro fabrication by precision cutting technique, Journal of the Japan Society for Precision Engineering, 61 (1995) 1361–1364. (in Japanese).

DOI: https://doi.org/10.2493/jjspe.61.1361

[5] K. Egashira, M. Iwata, Y. Nomura, Boring and face grooving using micro turning tools, CIRP Annals, 60 (2011) 81–84.

DOI: https://doi.org/10.1016/j.cirp.2011.03.075

[6] T. Masuzawa, M. Fujino, K. Kobayashi, Wire electro-discharge grinding for micro-machining, CIRP Annals, 34 (1985) 431–434.

DOI: https://doi.org/10.1016/s0007-8506(07)61805-8