Energy analysis of L-section extrusion using two different streamlined dies

Required deformation energy is one of the most important factors in metal forming process. So many attentions have been paid for finding the new ways to optimize the energy in various forming process. In this research extrusion of L-section with two different streamlined dies, one with Limason-shaped intermediate section and the other without intermediate section, has been analyzed. Experimental results show an interesting phenomena, extrusion with the second die which changes round initial section to L-exit section directly, without intermediate section, needs much more energy than that requires for the first die having intermediate section. These important results, considering practical point of view, are in good agreement with macro examination and theoretical analysis of metal flow pattern of L-section extrusion in flat face die which has done before.