Combined upper bound and slab method, finite element and experimental study of optimal die profile in extrusion

In this paper, a new combined upper bound and slab method is proposed for estimating the deformation load for cold rod extrusion of aluminum and lead in an optimum curved die profile. For the purpose of comparison, an optimum conical die that was already obtained by the authors, has also been selected and studied. The corresponding results have also been determined experimentally and by using the finite element software, ABAQUS. It is illustrated that the extrusion load in the optimum curved die during the deformation is considerably less than that in the optimum conical die.Peer reviewed: YesNRC publication: Ye

Experimental and numerical study of energy consumption in forward and backward rod extrusion

The primary concern in any metal forming operation is to produce the desired product with maximum die life and minimum die wear. These requirements are achieved when the required load and energy is minimised. In this paper, the extrusion energy is determined for the two optimal conical and curved dies, for aluminum and lead billets, in forward and backward extrusion, using FEM and by performing experiments. It is illustrated that the energy required to deform aluminum and lead billets in the optimum curved die is considerably less than that in the optimum conical die.Peer reviewed: YesNRC publication: Ye