The Effect of the Bridge’s Angle during Porthole Die Extrusion of Aluminum AA6082

During the porthole die extrusion, separated metal streams are welded together in welding chamber. The conditions under which this occurs and integrity of weld seam extrudate impacted by design bridge, including features such as its shape dimensions. In research, commercial finite element method (FEM) software package, DEFORM, was used to run a series simulation experiments order quantitatively understand relationship between bridge thermal mechanical history experienced material during impact has on final quality. can be roughly divided into two parts: lower part, close chamber, upper initially split billet streams. results showed that increasing angle led slightly higher extrusion loads exit temperatures. As increased, creating streamlined profile blunt profile, dead zone formed produced strains near surface material. contrast, changes geometry had little effect process or