Abstract
Gravity-feed micro-hole machining using spark assisted chemical engraving (SACE) has achieved repeatable hole drilling up to few hundred microns in depth. However, the tool wear and tool thermal expansion were not included in these measurements. In this paper, quantitative results are presented for the tool wear and tool expansion for three tool electrode materials: tungsten, steel and stainless steel. A simplified lumped thermal model predicting tool expansion and its dynamics is presented. It is as well demonstrated how the tool electrode temperature can be controlled by pulsed voltage supply. These results will enable higher measurement accuracy and therefore more precise micro-machining by SACE.
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Abou Ziki, J.D., Wüthrich, R. Tool wear and tool thermal expansion during micro-machining by spark assisted chemical engraving. Int J Adv Manuf Technol 61, 481–486 (2012). https://doi.org/10.1007/s00170-011-3731-6
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DOI: https://doi.org/10.1007/s00170-011-3731-6