Development technique for deep drawing without blank holder to produce circular cup of brass alloy

  • Authors

    • Ali Hassan Saleh Institute of technology/Baghdad
    • Ammer Khalaf Ali
    2015-01-29
    https://doi.org/10.14419/ijet.v4i1.3516
  • Sheet Metal Forming, Deep Drawing, FEM, LDR.
  • Of this technique compared to the conventional deep drawing is that the circular cup can be carried out in single action press with limit In this paper a new mechanism for deep drawing was proposed to produce circular cup from thin plate without blank holder. In this technique the die assembly includes punch, die and die-punch. A 2D axisymmetric finite element model was built using DEFORM software. Effect of die geometry (half- cone angle) on maximum load, thickness distribution, strain distribution and effect of clearance ratio between punch and (die-punch) on the wrinkling of the cup were investigated. Three half-cone angles of die (15o, 30o and 45o) were used for forming sheet metal of brass (CuZn37) which had initial thickness of (1mm) at four clearance ratio (c/t) for die of 30o half-cone angle. Finite element model results showed good agreement with experimental results. Die of 30o half-cone angle with clearance ratio (c/t) of 0.9 gave the best product without wrinkling. The main advantage drawing ratio (LDR) of 1.86 and blank diameter to blank thickness ratio (d/t) < 86.

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  • How to Cite

    Saleh, A. H., & Ali, A. K. (2015). Development technique for deep drawing without blank holder to produce circular cup of brass alloy. International Journal of Engineering & Technology, 4(1), 187-195. https://doi.org/10.14419/ijet.v4i1.3516