A Fundamental Study on Magnetic Pulse Forming with Bar Forming Coil

Bar 성형 코일을 이용한 전자기 성형에 관한 기초 연구

  • 심지연 (한국생산기술연구원 친환경부품소재센터) ;
  • 강봉용 (한국생산기술연구원 친환경부품소재센터) ;
  • 박동환 (웰메이트(주)) ;
  • 김일수 (목포대학교 기계공학과)
  • Received : 2011.04.18
  • Accepted : 2011.05.19
  • Published : 2011.06.15

Abstract

MPF(Magnetic pulse forming) process refers to the high velocity and high strain rate deformation of a low-ductility materials driven by electromagnetic forces that are generated by the rapid discharge current through forming coil. The goal of this study was to find the characteristics of dynamic behavior of workpiece and to find the main design process on MPF using bar forming coil. For these purposes, thin Al5053 sheet were used for the experiment. The measured strain data were analyzed by developed electromagnetic FE-model. The main design parameter is location of coil, electromagnetic force. In case of the bar forming coil, there exists the dead regions where the low electromagnetic force applied on the workpiece.

Keywords

References

  1. Toros, S. O., and Kacar, F., 2008, "Review of Warm Forming of Aluminum-magnesium Alloys," Journal of materials processing technology, Vol. 207, No. 1, pp. 1-12. https://doi.org/10.1016/j.jmatprotec.2008.03.057
  2. Li, L., Chen, Y., and Lin, S., 2003, "Laser Forming Thin Aluminum Sheets," Transactions of Nonferrous Metals Society of China, Vol. 13, No. 1, pp. 161-164.
  3. Kamal, M., and Daehn, G. S., 2007, "Agile Manufacturing of a Micro-embossed Case by a Two-step Electromagnetic Forming Process," Journal of Manufacturing Science and Engineering, Vol. 190, No. 1, pp. 41-50.
  4. Seth, M., Vohnout, V. J., and Daehn, G. S., 2005, "Formability of Steel Sheet in High Velocity Impact," Journal of materials processing technology, Vol. 168, No. 3, pp. 390-400. https://doi.org/10.1016/j.jmatprotec.2004.08.032
  5. Oliveira, D. A., Worswick, M. J., Finn, M., and Newman, D., 2005, " Electromagnetic Forming of Aluminnum Alloy Sheet: Free-form and Cavity Fill Experiments and Model," Journal of Materials Processing Technology, Vol. 170, No. 1, pp. 350-362. https://doi.org/10.1016/j.jmatprotec.2005.04.118
  6. Lee, H. M., Kang, B. S., and Kim, J., 2010, "Development of Sheet Metal Forming Apparatus Using Electromagnetic Lorentz Force" Transactions of Materials Processing, Vol. 19, No. 1, pp. 38-43. https://doi.org/10.5228/KSPP.2010.19.1.038
  7. Lee, J. S., 1988, "Electro-magnetic forming," KSME, Vol. 28, No. 5, pp. 476-4.
  8. Shim, J. Y., Kim, I. S., Kim, I. J., and Kang, B. Y., 2009 "Development of Experiment Model Prediction of Leakage Pressure in MPW," J. of the KSMTE, Vol. 19, No. 6, pp. 652-657.
  9. Kang, B. Y., Shim, J. Y., Kim, I. S., Park, D. H., Kim, I. J., and Lee, K. J., 2009, "Development of Working Coil for Magnetic Pulse Welding," Journal of the Korean Welding and Joining Society, Vol. 27, No. 4, pp. 6-12. https://doi.org/10.5781/KWJS.2009.27.4.006
  10. Kang, B. Y., Shim, J. Y., Kang, M. J., and Kim, I. J., 2008, "Principle and Application of Magnetic Pulse Welding," Journal of the Korean Welding and Joining Society, Vol. 26, No. 2, pp. 5-11. https://doi.org/10.5781/KWJS.2008.26.2.005
  11. Amit, A. T., Marina, M. A. and Daehn, G. S., 1996, "Effect of Sample Size on Ductility in Electromagnetic Ring Expansion," Scripta Materialia, Vol. 34, No. 8, pp. 1345-1350. https://doi.org/10.1016/1359-6462(95)00672-9
  12. Zhang, P., 2003, Joining enabled by high velocity deformation, A Thesis for a Doctorate, Ohio State University, USA.
  13. ANSYS, 2010, ANSYS User's Manual Version 10.0, ANSYS Inc.