Optimal Design of the Punch Shape for a Housing Lower

펀치 형상에 따른 Housing Lower 최적 공정 설계

Park, S.J.;Park, M.C.;Kim, D.H.

  • Received : 2015.04.27
  • Accepted : 2015.09.15
  • Published : 2015.10.01


In the current paper, a cold forging sequence was developed to manufacture a precisely cold forged H/Lower, which is used as the air back unit in commercial automobiles. The preform shape of the H/Lower influences the dimensional accuracy and stiffness of the final product. The shape factor (SF) ratio and shape of the tools are considered as the design parameters to achieve adequate backward extrusion height and maintain appropriate thickness variations. The optimal conditions of the design parameters were determined by using an artificial neural network (ANN). To experimentally verify the optimal preform and tool shapes, the experiments of the backward extrusion of the H/Lower were executed. The process design methodology proposed in the current paper, can provide a more systematic and economically feasible means for designing the preform and tool shapes for cold forging.


Housing Lower;Backward Extrusion;Finite Element Analysis;Optimal Design;Thickness Deviation