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Production of High-Curved Extruded Profiles Directly During Extrusion Process

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Production of High-Curved Extruded Profiles Directly During The Extrusion Process

Buntoro, K. B. Müller, Forschungszentrum Strangpressen, Technische Universität Berlin


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.

© Extrusion Technology for Aluminum Profiles Foundation (ET Foundation). All rights reserved. No part of The Proceedings may be reproduced in any form without the express written permission of the ET Foundation.