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Studies of the Effects of Flow Imbalance on Shape Variations

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Studies of the Effects of Flow Imbalance on Shape Variations in Aluminum Extrusion by use of Lagrangian FEM Software

F. Halvorsen and T. Aukrust, SINTEF Materials Technology

Track: EXTRUSION PROCESS - Extrusion Process

ABSTRACT --- The demands from the extrusion market on tighter geometric
tolerances on extruded sections are increasing. A study of basic mechanisms
governing shape variations of extruded sections is presented. The focus has been on
the effect of flow imbalance in the container and die due to variations in feeder
geometry and how this can create buckling of an extruded strip. In order to study
these basic mechanisms, a Lagrangian Finite Element Method (FEM) software, MSC
SuperForm, has been utilized. This software allows for the study of shape variations,
such as buckling and waving of a strip, due to flow imbalance caused by various
feeder designs. In order to verify the simulations, some extrusion experiments have
been performed.

© 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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