Production of High-Curved Extruded Profiles Directly During The Extrusion Process
Buntoro, K. B. Müller, Forschungszentrum Strangpressen, Technische Universität Berlin
Track: VALUE-ADDED PROCESSES - Extrusion
ABSTRACT --- The profiles for the space frame structure usually have a small profile circumscription
that is both solid and hollow, and also is bent in two dimensions, sometimes highly bent and a little bit
twisted. They are manufactured nowadays by stretch bending in a cold situation. This procedure is
expensive, because for each profile cross section, a set of dies is needed. Furthermore, for the
production of high-curved profile, the bending procedure must be applied several times with a stress
annealing between them. Producing a three-dimensional bent profile is also impossible. For those
reasons, substituting process for bending of extruded profiles, which follow consequently during the
extrusion process, using discs as a bending tool, is proposed. This bending process is a warm
deformation process that offers some advantages, such as no spring back, a smaller bending radius
can be produced in one single step and an integrated manufacturing. The bending process was
investigated by means of FEM simulation. A bending apparatus was realized and tested.
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