1,721,496 research outputs found
Influence of geometrical parameters on material welding in porthole die extrusion
No full textThe importance of aluminum extruded
profiles is increasing more and more in many
industrial fields. The most complex profiles
presenting hollow section are obtained using
porthole die configurations. One of the most
important phenomena taking place within this
configuration is the material solid state welding
that occurs when the flows reach the “welding
chamber”, located before the extrusion hole.
The present paper describes the
implementation of the welding criterion proposed
by Piwnik and Plata in DEFORM 2D
environment. The innovative aspect of this
research is that it is possible to actually weld the
material considering what happens to the billet
material itself. This procedure was used to
evaluate the influence of die geometrical
parameters on the welding formation.
A simplified 2D extrusion model was used to
reduce calculation time and to focus the
attention just on what happens in the welding
region.
The results show that the implemented
procedure is capable to monitor the welding
evolution during the extrusion process, and can
be used to predict the influence of die geometry
on the welding formation
- …
