Modeling approach for the determination of material flow and welding conditions in porthole die extrusion with gas pocket formation

Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review

Authors

The material flow in porthole dies is of crucial importance with regard to the seam weld quality in aluminum extrusion. Thus, experimental as well as numerical investigations on the effect of die geometry on the material flow were conducted. The experimental tests were performed on a 10 MN laboratory extrusion press. During the experimental trials, the extrusion ratio was varied by means of exchangeable die plates. Since the modular die allows removal of the aluminum in the welding chamber as well as in the feeders after the process, the material flow could be inspected in detail. The experimental results were used to improve the accuracy of FEA simulations, which were also conducted by commercial software. An attempt was made to improve the result quality of Eulerian FEA model regarding the simulation of an extrusion process with a gas pocket in the welding chamber. The influence of the modeling approach on the predicted material flow and on the contact pressure was analyzed and finally linked to the seam weld quality.

Original languageEnglish
Title of host publicationThe Current State-of-the-Art on Material Forming
EditorsRicardo Alves de Sousa, Robertt Valente
Number of pages7
Volume554-557
PublisherScientific.Net
Publication date2013
Pages787-793
ISBN (print)978-3-03785-719-9
ISBN (electronic)978-3-03826-100-1
DOIs
Publication statusPublished - 2013
Externally publishedYes
Event16th Conference on Material Forming - ESAFORM 2013 - Aveiro University, Aveiro, Portugal
Duration: 22.04.201324.04.2013
Conference number: 16
https://amcaonline.org.ar/pipermail/congresos/2012-July/000442.html

    Research areas

  • Engineering - Extrusion , FEA , Gas pocket , Porthole die , Seam weld