scholarly journals Coupled analysis of material flow and die deflection in direct aluminum extrusion

2011 ◽  
Author(s):  
W. Assaad ◽  
H. J. M. Geijselaers ◽  
Francisco Chinesta ◽  
Yvan Chastel ◽  
Mohamed El Mansori
Keyword(s):  
Material Flow ◽  
Coupled Analysis ◽  
Aluminum Extrusion ◽  
Die Deflection

scholarly journals Setting the Common Ground: A Generic Framework for Material Flow Analysis of Complex Systems

Recycling ◽  
2019 ◽  
Vol 4 (2) ◽  
pp. 23 ◽  
Author(s):  
Julia Tanzer ◽  
Helmut Rechberger
Keyword(s):  
Material Flow ◽  
Common Ground ◽  
Flow Analysis ◽  
Material Flow Analysis ◽  
Coupled Analysis ◽  
Private Institutions ◽  
Common Basis ◽  
Generic Framework ◽  
Multiple Materials ◽  
Definition Of

Circular economy is currently characterized by various definitions, measurement approaches, and critical analyses thereof coexisting alongside each other. Whether the concept eventually prevails or collapses will depend to some extent on our success in harmonizing assessment methods among public, scientific, and private institutions, as well as across different materials and scales. Therefore, in this article, we present a generic material flow analysis framework that might serve as a common basis for circularity assessment, and test it by means of three case studies. It proved impossible to eliminate all subjective assumptions when transforming a real complex system into the generic framework, especially regarding the definition of by-products. However, by introducing subsystems it is at least possible to make such assumptions transparent. Therefore, adequate comparability across regions, materials, and scales is provided. Moreover, the generic system allows for coupled analysis of multiple materials simultaneously so that interactions between them can be studied, as well and a deeper insight into overall sustainability of the system can be gained.

Simulation of Material Flow Coupled with Die Analysis in Complex Shape Extrusion

2013 ◽  
Vol 585 ◽  
pp. 85-92 ◽  
Author(s):  
Nikolay Biba ◽  
Sergei Stebunov ◽  
Andrey Lishny
Keyword(s):  
Material Flow ◽  
Mechanical Model ◽  
Complex Shape ◽  
The State ◽  
Practical Implementation ◽  
Entire Process ◽  
Thin Profile ◽  
Die Deflection ◽  
Extrusion Technology ◽  
Rigid Die

The paper presents recent studies in simulation of thin profile extrusion technology with the emphasis on interaction between the material flow and the state of the tooling set. To take into consideration die deflection and gradient of the temperature across the die and mandrel during the entire process cycle a transient coupled thermo-mechanical model has been built on the basis of QForm-Extrusion program. The paper explains the background for this model and some tests to verify its accuracy. Practical implementation of this model at several die making and extrusion companies has shown it to be of higher accuracy compared to the results of rigid die simulation.

Extrusion Benchmark 2011: Evaluation of Different Design Strategies on Process Conditions, Die Deflection and Seam Weld Quality in Hollow Profiles

2011 ◽  
Vol 491 ◽  
pp. 1-10 ◽  
Author(s):  
Alessandro Selvaggio ◽  
Antonio Segatori ◽  
Ahmet Güzel ◽  
Lorenzo Donati ◽  
Luca Tomesani ◽  
...  
Keyword(s):  
Material Flow ◽  
Experimental Investigations ◽  
Process Conditions ◽  
Design Strategies ◽  
Thermal Monitoring ◽  
Laser Sensors ◽  
Flow Balance ◽  
Accurate Comparison ◽  
Die Material ◽  
Die Deflection

In the paper experimental investigations aimed at allowing a detailed and accurate comparison of different FEM codes were presented and discussed. Two hollow profiles within the same die were characterized by different thicknesses within the profile, two welding chambers and critical tongues (one fully supported and one partially supported). The material flow balance was performed by means of feeder size and position on a profile and by means of bearings on the other one. Accurate monitoring of process parameters was carried out by using a self-calibrating pyrometer for profile temperature, six thermocouples for die thermal monitoring, a laser velocitymeter for profile speed and two laser sensors for die deflection on critical tongues. AA6082 alloy was used as deforming material, while H-11 hot-work tool steel was selected for the die material. The experiments were repeated at least three times under the same conditions in order to provide a nearly steady state statistical distribution of the acquired data. These are used as a reference for the 2011 edition of the extrusion benchmark.

Numerical Simulation and Die Optimization Design of Extrusion Process for a Complex Hollow Aluminum Alloy Multi-Hole Die

2014 ◽  
Vol 881-883 ◽  
pp. 1778-1783
Author(s):  
Wei Xia ◽  
Can Wang ◽  
Li Hao Jiang ◽  
Jian Min Zeng
Keyword(s):  
Numerical Simulation ◽  
Material Flow ◽  
Optimization Design ◽  
Reference Value ◽  
Extrusion Process ◽  
Aluminum Extrusion ◽  
Arbitrary Lagrangian Eulerian ◽  
Combined Method ◽  
Double Step ◽  
Extrusion Die

The steady state extrusion process of a complex, multi-hole aluminum extrusion die was simulated using the Arbitrary Lagrangian Eulerian (ALE) algorithm. According to the numerical simulation results and the extrusion experiment, a combined method of modifying the portholes, double-step welding chamber and adjusting bearings were proposed for qualified profiles. In this study, the influence of the shape of portholes and double-step welding chamber on the material flow velocity distribution at the outlet were emphatically analysed, and some reference value for the designing and modifying of multi-hole die is existed basing on the method.

Experimental and Numerical Analysis of Material Flow in Porthole Die Extrusion

2011 ◽  
Vol 491 ◽  
pp. 97-104 ◽  
Author(s):  
Thomas Kloppenborg ◽  
M. Schwane ◽  
Nooman Ben Khalifa ◽  
A. Erman Tekkaya ◽  
Alexander Brosius
Keyword(s):  
Numerical Analysis ◽  
Material Flow ◽  
Aluminum Extrusion ◽  
Fundamental Knowledge ◽  
Porthole Die ◽  
Accurate Design ◽  
Simulation Results ◽  
Software Codes ◽  
Die Extrusion ◽  
Porthole Die Extrusion

The design of porthole dies for aluminum extrusion processes is very complex. For the accurate design, fundamental knowledge about material flow is of major importance. To gain these information, numerical methods are increasingly utilized. The accuracy of the simulation results depends mainly on the precision of the used boundary conditions in the model. Therefore, visioplastic analyses of the material flow inside a porthole die are presented in this paper. A special modular tool concept was developed to prepare and visualize the material flow inside the process. The results of the experimental analysis were used for the verification of numerical results which were calculated with the commercial software codes Deform3D and HyperXtrude.

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