전해가공을 이용한 Nitinol 형상기억합금의 그루브 패턴 가공특성에 관한 연구

The Machining Characteristics of Groove Patterning for Nitinol Shape Memory Alloy Using Electrochemical Machining

  • 신태희 (인하대학교 기계공학과 대학원) ;
  • 김백겸 (인하대학교 기계공학과 대학원) ;
  • 백승엽 (인덕대학 기계설계과) ;
  • 이은상 (인하대학교 기계공학과)
  • 발행 : 2009.12.15

초록

A development of smart materials is becoming a prominent issue on present industries. A smart material, included in functions, is needed for micro fabrication. A shape memory alloy(SMA) in a smart material is best known material. Ni-Ti alloy, composed of nikel and titanium is one of the best shape memory alloy(SMA). Nitinol SMA is used for a lot of high tech industry such as aero space, medical device, micro actuator, sensor system. However, Ni-Ti SMA is difficult to process to make a shape and fabrications as traditional machining process. Because nitinol SMA, that is contained nikel content more than titanium content, has similar physical characteristics of titanium. In this paper, the characteristics of ECM grooving process for nitinol SMA are investigated by experiments. The experiments in this study are progressed for power, gap distance and machining time. The characteristics are found each part. Fine shape in work piece can be found on conditions; current 6A, duty factor 50%, gap distance 15%, gap distance $15{\mu}m$, machining time 10min.

키워드

참고문헌

  1. Mukherjee, R., Christian, T. F., and Thiel, R. A., 1996, "An actuation system for control multiple shape memory alloy actuator," Sensor and Actuators A:physics. Vol. 55, pp. 185-192.
  2. McGeough, J. A., 1974, Principles of Electrochemical machining, Chapman Hall, London.
  3. Wei, B., Rajurkar, K. P., Talpallikar, S., "Identification of Interelectrode Gap Size in Pulse Electrochemical Machining," Journal of Electrochemical Society, Vol. 144, No. 11, pp. 3913-3918.
  4. Choi, Y. S and Park, K. Y, 2000, "Relationship between Machining Characteristics & Current Efficiency in Electro Chemical Machining of Ni-Ti Shape Memory Alloy," The KSMTE Autumn conference 2000, pp. 320-325.
  5. Lee, E. S. and Kim, C. G., 2003, "A study on machining characteristics of the electropolishing of aluminum alloy," Transactions of the Korean Society of Machine Tool Engineers, Vol. 12, No. 2, pp. 17-21.
  6. Ahn, S. H., Choi, S. H., Ryu, S. H., Choi, D. K., Chu, C. N., 2003, "Localized electro-chemical micro machining using ucali short pulse," The Korean Society of Mechanical Engineering Spring conference, pp. 1052-1058.
  7. Schuuster, R., Kirchner, V., Allongue, P., and Etrl, G., 2000, "Electrochemical micro machining," Science, Vol. 289, pp. 98-101.
  8. Ma, X. Z., Zhang, L., Cao, G. H., Lin, Y. and Tang, J., 2007, "Electrochemical micro-machining of nitinol by confined-etchant-layer technique," Electrochimica Acta, Vol. 52, pp. 4191-4196.