Transactions of Materials Processing (소성∙가공)

The Korean Society for Technology of Plasticity and materials processing (한국소성∙가공학회)
권호 표지
DOI QR코드

DOI QR Code

Formability and Dimensional Characteristics of Stretch-Drawn Beryllium-Copper Sheet Products

극박판의 인장-드로잉 성형에서의 제품품질 비교

  • 이기성 (서울과학기술대학교 산업대학원 정밀기계공학과) ;
  • 정완진 (서울과학기술대학교 제품설계금형공학과) ;
  • 김종호 (서울과학기술대학교 제품설계금형공학과)
  • Received : 2011.05.20
  • Accepted : 2011.07.07
  • Published : 2011.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

A beryllium copper alloy(C1720) sheet was stretch-drawn using different processes. A hemispherical punch was first used and the forming behavior was examined. Then, cylindrical cups with a hemispherical head were produced by either one-step drawing or two-step forming(sequential stretch forming-drawing). The one-step drawing showed the better formability than two-step forming. However, the two-step forming was the superior process in terms of attaining shape accuracy.

Keywords

References

  1. M. Gotoh, M. Katoh, M. Yamashita, 1997, Studies of Stretch-Drawing Process of Sheet Metals, J. Mater. Process. Technol., Vol. 63, Issues 1-3, pp. 123-128. https://doi.org/10.1016/S0924-0136(96)02611-8
  2. M. Gotoh, Y. S. Kim, M. Yamashita, 2003, A fundamental study of can forming by the stretch-drawing process, J. Mater. Process. Technol., Vol. 138, Issues 1-3, pp. 545-550. https://doi.org/10.1016/S0924-0136(03)00144-4
  3. W. J. Choi, J. B. Nam, D. S. Bae, Y. S. Kim, 1989, A Study on the Forming Limit of Cold-rolled Sheet Steels for Automobile, KSAE Spring Conf., pp. 18-22.
  4. M. J. Kim, Y. H. Young, D. R. Ko, 1995, An Experimental Study on the Effect of the Draw-beads in Sheet Metal Forming, Proc. of KSPE Autumn Conf., pp. 240-245.
  5. S. Thiruvarudchelvan, 1995, Three novel techniques for forming hemispherical cups with flexible tooling, J. Mater. Process. Technol., Vol. 54, Issue 1-42, pp. 129-136. https://doi.org/10.1016/0924-0136(95)01931-6
  6. Cebeli Ozek, Muhammet Bal, 2009, The effect of die/blank holder and punch radius on limit drawing ratio in angular deep-drawing dies, Int. J. Adv. Manuf. Technol., Vol. 40, No. 11-12, pp. 1077-1083. https://doi.org/10.1007/s00170-008-1435-3
  7. S. S. Park, K. B. Hwang, J. B. Kim, J. H. Kim, 2010, Investigation of deep drawability and product qualities of ultra thin beryllium copper sheet metal, Trans. Mater. Process., Vol. 19, No. 3, pp. 197-184.
  8. K. S. Lee, H. K. Jung, J. B. Kim, J. H. Kim, 2011, Thickness Distribution of Hemispherical Cup in Meso-Scale Deep Drawing Process, Trans. Mater. Process., Vol. 20, No. 1, pp. 36-41. https://doi.org/10.5228/KSTP.2011.20.1.36

Cited by

  1. A Study on the Development of Forming Process for a Compressor Shell Body vol.33, pp.8, 2016, https://doi.org/10.7736/KSPE.2016.33.8.635