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Investigation for Clamping Properties of the Tool Clamping Device Based on the Shape Memory Alloy for Application of a Micro Spindle System  

Shin, Woo-Cheol (한국기계연구원 지능기계연구센터)
Ro, Seung-Kook (한국기계연구원 지능기계연구센터)
Park, Jong-Kweon (한국기계연구원 지능기계연구센터)
Lee, Deug-Woo (부산대학교 나노과학기술대학)
Chung, Jun-Mo (충남대학교 기계공학과 대학원)
Publication Information
Transactions of the Korean Society of Machine Tool Engineers / v.16, no.6, 2007 , pp. 9-14 More about this Journal
Abstract
In this paper, a rotating tool clamping device was developed based on a shape memory alloy(SMA) and its feasibility as a tool holder was experimentally explored. The SMA-based device was able to alter clamping to unclamping through temperature control within 1 second. The means and repeatability(${\sigma}$) of the tool clamping force were 185.5N and 6N respectively and its drifts were less than 3% for an hour. Considering the temperature hysteresis of the SMA-based tool clamping device, it is necessary to heat the SMA ring to around $50^{\circ}C$ after tool change to obtain more clamping force.
Keywords
shape memory alloy; tool clamping device; tool clamping force; temperature hysteresis; micro spindle system;
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