Abstract
Extruded semi-finished products, such as profiles or tubes, are of very high importance for many of today¿s industrial branches and are indispensable. If aluminium, copper, magnesium or steel, if direct, indirect or hydrostatical extruded, if aviation, automotive, mechanical engineering or building systems, the variation and application possibilities are hugh. In this thesis the topic of direct aluminium extrusion is being addressed, more precisely the possible usage of finite element method for the prediction of selected aluminium extrusion defects. The software in use is QForm UK Extrusion by the eponymous producer QForm. This thesis is being created with Hydro Extrusion Nenzing GmbH at whose site the trials as well as the evaluations are being done, too. First and foremost, suitable profiles must be selected, four in total. Two for the analysis of the surface quality, one for the length of the charge weld and one for the quality of the longitudinal seam weld. Afterwards, the die files of those selected profiles are being prepared for a smooth simulation with process parameters from the production conditions. The trials are performed on the 40-meganewton press and the 22-meganewton press. For the evaluation of the surface quality the profiles are being anodized, for the length of the charge weld etched and the longitudinal seam weld quality is being determined by mandrel tests. The validation for the simulations is done by comparison of the exit temperature. For two profiles the simulation correctly predicted the trials. Both the charge weld length as well as the longitudinal seam weld quality are as simulated. For the prediction of the surface quality the simulation reached its limits, however important lesson can be learned anyways. This thesis can be used as a basis for further, more specific projects regarding the simulation of aluminium extrusion defects as well as a helpful tool for implementing simulation software in daily production.
| Translated title of the contribution | Analysis of the applicability of FEM simulation for predicting selected process errors in aluminum extrusion |
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| Original language | German |
| Qualification | Dipl.-Ing. |
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| Award date | 19 Dec 2025 |
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| Publication status | Published - 2025 |
Bibliographical note
no embargoKeywords
- Extrusion
- QForm
- Simulation
- Extrusion Defects