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양방향성 형상기억합금을 이용한 공작물 척킹장치 : 유용성 검증
신우철(Woo-Cheol Shin),노승국(Seung-Kook Ro),박종권(Jong-Kweon Park) 한국생산제조학회 2009 한국생산제조학회지 Vol.18 No.5
In this study, a workpiece-chucking device that generates a chucking force from a shape memory alloy is introduced. This paper first presents train procedure to transform a commercial one-way shape memory alloy into a two-way shape memory alloy, which makes unclamping mechanism of the chucking device simpler than that using the one-way shape memory alloy. Second, it describes a conceptual design of the workpiece-chucking device using the two-way type shape memory alloy. Third, it presents a prototype and its chucking characteristics, such as time-response of clamping/unclamping operations and a relationship between temperatures and chucking forces. Finally, it describes a mill-machining test conducted with the prototype. The results confirm that the proposed workpiece-chucking device is feasible for micro machine-tools.
노승국(Seung-Kook Ro),박종권(Jong-Kweon Park),박현덕(Hyun-Duk Park),김양근(Yang-Keun Kim) 한국생산제조학회 2013 한국생산제조학회지 Vol.22 No.4
This study introduces a recently designed desktop-sized NC turning system and its components. This machine is designed for the ultra-precise turning of parts with a diameter of 0.5?20 mm with minimum space usage for the machine. This study aims to achieve submicron-level accuracy of movements and good rigidity of the machine for precision machining using the desktop-sized machine. The components such as the main machine structure, air bearing servo spindle, and XZ stage with needle roller guides are designed, and the designed machine is built with a PC-based CNC controller. Its static and dynamic stiffness performances and positioning resolutions are tested. Through machining tests with single-crystal diamond tools, a form error less than 0.8 μm and surface roughness (Ra) of 0.03 μm for workpieces are obtained.