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Manufacturing Process of Curved Extrusions for Aluminum

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Manufacturing Process of Curved Extrusions for Aluminum

  Alf Birkenstock, Karl-Heinz Lindner and Norbert-William Sucke, Erbslöh AG

Track: VALUE-ADDED PROCESSES - Extrusion

ABSTRACT --- A need to reduce fuel consumption and a growing variety of vehicle
designs are leading to the use of lightweight automotive bodywork. For bodywork with
a space-frame construction, conventionally curved profiles (manufactured using the
process chain comprising extrusion, stretching and bending) are used. Where
necessary, to comply with tolerances, the profiles are then hydro-formed (IHU). A new
and innovative forming process, known as “rounding during extrusion" allows profiles
with no spring-back to be manufactured. Such profiles have highly accurate contours.
The European Patent EP 0706 843 B1 “Method and device for the production of curved
work pieces” (Patent holder: Erbslöh AG) forms the basis of the BMBF-joint research
project “rounding during extrusion” (Duration: 01/03/2001 – 31/12/2004). The aim of the
project is to transform the concept behind the patent into a manufacturing process that
is ready for use by the end of 2004.

© 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.

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