Numerical Simulation of Warm Deep Drawing of AZ31 Magnesium Alloy Sheet with Variable Blank Holder Force

摘要:

文章预览

Blank holder force (BHF) plays an important role in sheet metal forming. Previous studies demonstrated that variable blank holder forces can improve the cold formability of steel blank, but the research on the application of variable blank holder force in warm forming of magnesium sheet forming has not been well investigated. In this study, the mechanical property of AZ31 magnesium alloy sheet is measured through some uniaxial tensile tests. In order to obtain the variational rule of the BHF, a mathematical model of BHF is deduced based on the energy theory. The variational rule of the BHF over the punch stroke is analyzed. Finally, three profiles of the BHF curve are designed, and the numerical simulation of warm deep drawing process of magnesium alloy sheet is also performed. A suitable variable blank holder force scheme is obtained through comparison among three results of simulation. The simulation indicates that the limiting drawing ratio of AZ31 magnesium alloy sheet can be improved from 3.0 to 3.5 with the suitable blank holder force varied by an inverted V curve.

信息:

期刊:

编辑:

N. Ohno and T. Uehara

页数:

639-644

引用:

Y. H. Peng et al., "Numerical Simulation of Warm Deep Drawing of AZ31 Magnesium Alloy Sheet with Variable Blank Holder Force", Key Engineering Materials, Vols. 340-341, pp. 639-644, 2007

上线时间:

June 2007

输出:

价格:

$38.00

[1] E. J Obermeyer, S.A. Majlessi: A review of recent advances in the application of blank holder force towards improving the forming limits of sheet metal parts, Journal of Materials Processing Technology, 75(1998), 222-234.

DOI: https://doi.org/10.1016/s0924-0136(97)00368-3

[2] Z.Q. Sheng, S. Jirathearanat, and T. Altan: Adaptive FEM simulation for prediction of variable blank holder force in conical cup drawing, International Journal of Machine Tools & Manufacture, 44(2004), 487-494.

DOI: https://doi.org/10.1016/j.ijmachtools.2003.11.001

[3] Lin Wang, T.C. Lee: Controlled strain path forming process with space variant blank holder force using RSM method, Journal of Materials Processing Technology, 167(2005), 447-455.

DOI: https://doi.org/10.1016/j.jmatprotec.2005.06.017

[4] N. Krishnan, J. Cao: Estimation of optimal blank holder force trajectories in segmented binders using an ARMA model, Trans. ASME, J. Manuf. Sci. Eng. 125 (2003) 763-770.

DOI: https://doi.org/10.1115/1.1616948

[5] E. Doege, K. Droder: Sheet metal forming of magnesium wrought alloys-formability and process technology, Journal of Materials Processing Technology, 115 (2001) 14-19.

DOI: https://doi.org/10.1016/s0924-0136(01)00760-9

[6] Fuh-Kuo Chen, Tyng-Bin Huang, Chih-Kun Chang: Deep drawing of square cups with magnesium alloy AZ31 sheets, International Journal of Machine Tools & Manufacture, 43 (2003) 1553-1559.

DOI: https://doi.org/10.1016/s0890-6955(03)00198-6

[7] S. Yoshihara , H. Yamamoto, K. Manabe, H. Nishimura: Formability enhancement in magnesium alloy deep drawing by local heating and cooling technique, Journal of Materials Processing Technology, 143-144 (2003) 612-615.

DOI: https://doi.org/10.1016/s0924-0136(03)00442-4

[8] LIANG Bingwen, HU Shiguang. The plasticity theory of sheet forming. Beijing� Mechanics Industry Press, 1987�in Chinese�.