Effect of Draw Bead Height on Wall Features in Rectangular Deep-Drawing Process Using Finite Element Method

Abstract:

Concave/convex wall features are usually generated in the deep-drawn parts with complicated geometry, especially the difficult-to-deep draw materials. The application of the draw bead could reduce the concave/convex wall features. However, it is difficult to determine the suitable draw bead geometry and its position to obtain a straight wall. In this study, the effects of draw bead height were investigated using the finite element method (FEM) and experiments. The application of the draw bead and the effects of its height on the concave/convex wall features could be theoretically clarified on the basis of principal stress distribution. The application of draw bead led to the decrease in tensile stress in the direction of punch movement and also increased in the tensile stress distributed to the corner zone; therefore, the concave wall feature decreased. In addition, this feature decreased as the draw bead height increased. However, the application of a very large draw bead height resulted in a convex feature. The FEM simulation results were validated by experiments in the following two cases, i.e., without and with draw bead formations. With reference to the material thickness distribution, the FEM simulation results showed a good agreement with experimental results.

• Periodical: Advanced Materials Research (Volumes 264-265)
• Pages: 1580-1585
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.264-265.1580
• Online since: June 2011
• Authors: Sutasn Thipprakmas
• Keywords: Concave, Convex, Deep Drawing, Draw Bead, Finite Element Model (FEM), Rectangular

References

[1] L.M. Ren, S.H. Zhang, G. Palumbo, D. Sorgente and L. Tricarico, Numerical simulation on warm deep drawing of magnesium alloy AZ31 sheets, Mat. Sci. Eng. A. Vol. 499 (2009), 526-532.

DOI: 10.1016/j.msea.2007.11.132

[2] M. Gavas and M. Izciler, Effect of blank holder gap on deep drawing of square cups, Mater. Design. Vol. 28 (2007), 1641-1646.

DOI: 10.1016/j.matdes.2006.03.024

[3] T.W. Ku, Y. Kim and B.S. Kang, Design and modification of tool to manufacture rectangular cup of Ni-MH battery for hybrid cars, J. Mater. Process. Tech. Vol. 187-188 (2007), 197-201.

DOI: 10.1016/j.jmatprotec.2006.11.104

[4] S. Thipprakmas, Affect of part geometry on wall features in rectangular deep-drawing processes using finite element method. Key Engineering Materials, Vol. 410-411 (2009), 579-585.

DOI: 10.4028/www.scientific.net/kem.410-411.579

[5] S. Ali, S. Hinduja, J. Atkinson, P. Bolt and R. Werkhoven, The effect of ultra-low frequency pulsations on tearing during deep drawing of cylindrical cups, Int. J. Mach. Tool. Manu. Vol. 48 (2008), 558-564.

DOI: 10.1016/j.ijmachtools.2007.06.013

[6] R. Padmanabhan, M.C. Oliveira, J.L. Alves and L.F. Menezes, Influence of process parameters on the deep drawing of stainless steel, Finite. Elem. Anal. Des. Vol. 43 (2007), 1062-1067.

DOI: 10.1016/j.finel.2007.06.011

[7] R. Padmanabhan, M.C. Oliveira, J.L. Alves and L.F. Menezes, Numerical simulation and analysis on the deep drawing of LPG bottles, J. Mater. Process. Tech. Vol. 200 (2008), 416-423.

DOI: 10.1016/j.jmatprotec.2007.08.047

[8] L.M. Smith, Y.J. Zhou, D.J. Zhou, C. Du, C. Wanintrudal, A new experimental test apparatus for angle binder draw bead simulations, J. Mater. Process. Tech. Vol. 209 (2009), 4942-4948.

DOI: 10.1016/j.jmatprotec.2009.01.017