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형상기억합금 기반 공구 클램핑 장치의 체결특성 실험적 고찰
신우철(W. C. Shin),노승국(S. K. Ro),박종권(J. K. Park),이득우(D. W. Lee) 한국생산제조학회 2007 한국공작기계학회 춘계학술대회논문집 Vol.2007 No.-
This paper introduces a novel tool clamping device based on the shape memory alloy in a micro-spindle system. Experiments, such as clamping/unclamping operation, repeatability of the clamping force, hysteresis characteristic, time drift of the clamping force, and comparison of the clamping forces according to basic designs were performed. These experimental results present the feasibility of the shape memory alloys for clamping tools in a micro-spindle.
신우철(W.C. Shin),노승국(S.K. Ro),김병섭(B.S. Kim),박종권(J.K. Park) 한국생산제조학회 2010 한국공작기계학회 추계학술대회논문집 Vol.2010 No.-
Conventional shrink-fit tool holders require heavy investments for heating equipment. Generally the heating equipment has to heat the tool holder up to 200~300℃ for tool changes. To improve the existing shrink-fit tool holders, a novel shrink-fit tool holder that is able to unclamp a tool at 40~50℃ has been developed. This holder makes it possible to switch between the clamped and unclamped states by using a simple device, which has lower power, smaller size and lower cost than the heating equipment of the conventional shrink-fit tool holders. In this paper, a simple heating device for the advanced shrink-fit tool holder is suggested. Characteristics of the simple heating device were investigated experimentally.
형상기억합금과 펠티어 소자를 이용한 초소형 공구 클램핑 장치연구
신우철(W. C. Shin),노승국(S. K. Ro),박종권(J. K. Park),이득우(D. W. Lee) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
This paper presents the construction of micro tool clamping device using a Ni-Ti shape memory alloy ring. Clamping force of the device is produced by elastic force of the SMA reverted to its original shape in normal temperature. Phase transformation of the SMA was realized by temperature control using a peltier element. Prototype of the SMA tool clamping device was fabricated and examined its clamping force.
소형 가열 및 냉각장치 개발을 위한 펠티어소자 특성 실험적 고찰
신우철(W.C. Shin),노승국(S.K. Ro),김병섭(B.S. Kim),박종권(J.K. Park) 한국생산제조학회 2010 한국공작기계학회 추계학술대회논문집 Vol.2010 No.-
In this paper the characteristics of a peltier element were experimentally investigated for development of a miniaturized cooling and heating device, which will be applied to heat and cool SMA rings of the SMA-based tool clamping device. This paper describes that the peltier element has abilities to cool as well as heat by change in direction of its applied voltage. Also, it presents that hot surface of a peltier element must be sufficiently cooled to drop the temperature of cold surface to less than 0℃. More current applied in a peltier element, more cooling performance, but increasement of the current is no account when the coolant of the hot surface is insuffcient.
신우철(W. C. Shin),노승국(S. K. Ro),이득우(D. W. Lee),박종권(J. K. Park) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
This paper presents tool-setup measurement technology of a small tool-clamping device. Generally, geometrical tool clamping error is occurred by the misalingnment between spindle rotation axis and axis of tool holder and tool. In this study, the concept of geometrical tool clamping error is established and measurement technology of the misalignment between axis of a tool holder and axis of a tool is introduced.