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        Evaluation of a pyramid die extrusion for a hollow aluminum profile using FE simulation

        Liang Chen,Guoqun Zhao,Junquan Yu,Wendong Zhang 대한기계학회 2015 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.29 No.5

        The pyramid die extrusion for a hollow aluminum profile was analyzed to investigate the potential of such innovative dies. For thispurpose, the pyramid and conventional porthole dies were respectively designed for a given hollow aluminum profile. And the extrusionprocess was comprehensively studied by performing different types of finite element simulation, such as the analysis of steady state,transient state and billet skin tracking. The effects of pyramid angle on the evaluation parameters of extrusion, such as extrusion load,material flow, exit temperature, length of transverse weld, quality of longitudinal weld, back end defect and die stress were overall analyzedand compared with the conventional porthole die. Through this study, the advantages and shortcomings of pyramid die were wellconcluded, which should be important information for die designers and makers.

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