The demand for specific properties and excellent quality of extruded aluminum profiles stretches to the limit the abilities of extruders and die makers: ever more complex sections, hard alloys, emerging technologies, and microstructure control are only some of the manufacturers’ everyday concerns. Key factors for innovation as well as competitiveness are a skilled engineering analysis and reliable software; however, no reference community exists for the extrusion analyst and a common basis for evaluating commercial codes capabilities is missing. The extrusion benchmark is a conference on the borderline of technology during which researchers, industries, and software suppliers from all over the world will show their competence in predicting the results of a real extrusion activity whose outcome is unknown and participants will get in touch with the major international experts on their use and development. In this paper, the experimental trials for evaluating codes’ capabilities in terms of analyzing real industrial problems are fully described and analyzed. The provided inputs for running the simulations are initially presented: die design, material flow stress, friction conditions, and heat exchanges are suggested to participants with insufficient experience in extrusion simulations. A brief discussion on the die design is reported in order to explain the aim of the organizers in performing testing conditions which emphasize process-related issues. A multi-hole die with four L-shaped orifices was produced with 4 different pocket shapes thus providing valuable information on material flow inside the die at different process conditions. The results of trial tests performed at the University of Dortmund are completely reported and discussed on the basis of profile length, exiting temperature and press load. Finally, a brief discussion on codes’ performance is presented and discussed so as to provide to the audience the state of the art of FEM capabilities applied to the study of the extrusion process.
L. Donati, L. Tomesani, N. Ben Khalifa, D. Pietzka (2009). EXTRUSION BENCHMARK 2007. GLASGOW : Nafems ltd.
EXTRUSION BENCHMARK 2007
DONATI, LORENZO;TOMESANI, LUCA;
2009
Abstract
The demand for specific properties and excellent quality of extruded aluminum profiles stretches to the limit the abilities of extruders and die makers: ever more complex sections, hard alloys, emerging technologies, and microstructure control are only some of the manufacturers’ everyday concerns. Key factors for innovation as well as competitiveness are a skilled engineering analysis and reliable software; however, no reference community exists for the extrusion analyst and a common basis for evaluating commercial codes capabilities is missing. The extrusion benchmark is a conference on the borderline of technology during which researchers, industries, and software suppliers from all over the world will show their competence in predicting the results of a real extrusion activity whose outcome is unknown and participants will get in touch with the major international experts on their use and development. In this paper, the experimental trials for evaluating codes’ capabilities in terms of analyzing real industrial problems are fully described and analyzed. The provided inputs for running the simulations are initially presented: die design, material flow stress, friction conditions, and heat exchanges are suggested to participants with insufficient experience in extrusion simulations. A brief discussion on the die design is reported in order to explain the aim of the organizers in performing testing conditions which emphasize process-related issues. A multi-hole die with four L-shaped orifices was produced with 4 different pocket shapes thus providing valuable information on material flow inside the die at different process conditions. The results of trial tests performed at the University of Dortmund are completely reported and discussed on the basis of profile length, exiting temperature and press load. Finally, a brief discussion on codes’ performance is presented and discussed so as to provide to the audience the state of the art of FEM capabilities applied to the study of the extrusion process.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
