Investigation of Formability of Cylindrical Cups in Warm Drawing of Stainless-Aluminum Clad Sheet Metal

스테인리스-알루미늄 클래드 강판재의 원형컵 온간 성형성 연구

Ryu, Ho-Yeon;Kim, Yeong-Eun;Kim, Jong-Ho

  • Published : 2000.01.01


Warm, forming technique which is one of the new forming technologies to improve formability of sheet metal is applied to the cylindrical cup drawing of stainless-aluminum. clad sheets. In experiments the temperature of die and blank holder is varied from room temperature to 18$0^{\circ}C$, while the punch is cooled by circulation of coolant to increase the fracture strength of workpiece on the punch corner area. Test materials chosen for experiments are STS304-A1050-STS304, STS304-A1050-STS430 clad sheets and A1050-0 aluminum sheet. Teflon film as a lubricant is used on both sides of a workpiece. The limit drawing ratio as well as quality of drawn cups(distribution of thickness and hardness)are investigated and validity of warm drawing process is also discussed.


Warm Forming;Clad Sheet Metal;Formability;Teflon Film;Limit Drawing Ratio


  1. 류호연, 배원택, 김종호, 김성민, 구본영, 금영탁, '알루미늄 합금 박판 비등온 성형 공정의 유한요소해석 및 실험적 연구(제1부 실험),' 한국소성가공학회 춘계학술대회 논문집, pp. 53-57
  2. Imatani, S., Yamaguchi, K., Oakakura, N. and Yin, C. Y., 1993, 'Mechanical Response of Laminated Sheet Metals,' 4th lCTP, pp. 1887-1892
  3. 近藤一義, 平岩正室, 1991, '金屬クラツド板のプレス成形における基礎的方法,' 塑性と加工(日本塑成加工學會誌), Vol.32, No. 360, pp. 13-19
  4. 吉田總仁, 1991, '積層 合板の彈塑性變形の力學,' 塑性と加工(日本塑成加工學會誌), Vol.32, No. 360, pp. 20-26
  5. Liu, J., Yamaguchi, K., Imatani, S. and Takakura, N., 1996, 'Investigation on Variation of Drawability of Laminated Sheet Metals Using FEM Simulations,' 5th ICTP. pp. 699-702
  6. Kim, J. R., Choi, C. S., Jeong, B. Y. and Lee, G. R., 1993, 'Deep Drawing of Stainless Steel in Warm Working Condition Using a Single Crank Press,' 4th ICTP. pp. 1691-1694
  7. 加藤俊之, 1997, '表面處理鋼板のプレス成形法,' 塑性と加工(日本塑成加工學會誌), Vol. 38, No.432, pp. 35-39
  8. 臼田松男;橋本活二, 1997, '復板材のプレス成形法,' 塑性と加工(日本塑成加工學會誌), Vol. 38, No. 432, pp. 40-44
  9. Gotoh. M., and Chung.T.H., 1995, 'Numerical Investigation of Forming Limit of Sheet Metals due to Shear Band Localization (1st Report Dependence of the Forming Limit Strain of Sheet Metals on the Thickness and the Forming Limit of Gradient Metal sheets),' JSME, Vol. 61, No. 593, pp. 2636-2641
  10. Chung, T. H. and Gotoh, M., 1995, 'Numerical Investigation of Forming Limit of Sheet Metals due to Shear Band Localization(2nd Report, Forming Limit Strain of Banded Sheet Metals),' JSME, Vol. 62, No. 594, pp. 2636-2641
  11. Yoshida, F., Mori, K., Ohmori, M. and Okada, T., 1993, 'Deep Drawing of Copper/Steel Sheet Metal Laminate,' 4th JCTP, pp. 1657-1662
  12. 石尾雅昭, 1991, '冷間壓接による金屬クラツド板の 製造法と用途,' 塑性と加工(日本塑成加工學會誌), Vol. 32, No. 360, pp. 27-33
  13. 山中克彦, 1997, '板材成形における最近の動向,' 塑性と加工(日本塑成加工學會誌), Vol. 38, No.432, pp. 23-27