Towards a more holistic approach to quality improvements in aluminium die casting

Frayman, Yakov, Gunn, Bruce and Nahavandi, Saeid 2009, Towards a more holistic approach to quality improvements in aluminium die casting, Materials science forum, vol. 618-619, pp. 341-344, doi: 10.4028/

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Title Towards a more holistic approach to quality improvements in aluminium die casting
Author(s) Frayman, Yakov
Gunn, Bruce
Nahavandi, SaeidORCID iD for Nahavandi, Saeid
Journal name Materials science forum
Volume number 618-619
Start page 341
End page 344
Total pages 4
Publisher Trans Tech Publications Ltd.
Place of publication Stafa-Zurich, Switzerland
Publication date 2009-04
ISSN 0255-5476
Keyword(s) aluminium
die casting
dynamical system theor
Summary This work evaluates the feasibility of using a holistic approach, based on dynamical system theory,
to reduce porosity defects in high pressure aluminum die casting. Quality improvements, from a
dynamical system perspective mean the ability to move the die casting process out of its natural
equilibrium to a more beneficial state and the ability to maintain this new process state. This more beneficial state may be achieved in several ways. One way is to increase the amount of forcing to overcome natural process resistance. This forcing approach is represented by typical continuous intervention policy, with modifications in die/part design and/or process parameters. An alternative approach is to reduce the amount of natural process resistance, in particular the amount of process disturbance, allowing the process to move out of its natural equilibrium with much less forcing. This alternative uses the self-regulating ability of dynamical systems thus decreasing the amount of human intervention required. In this respect, the influence of vacuum on time on chattering at the first stage of the casting shot was identified as a good process candidate for testing using dynamical system theory. A significant reduction in porosity defects was achieved, which also set the process on a path of slow but consistent self-improvement.
Language eng
DOI 10.4028/
Field of Research 091302 Automation and Control Engineering
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2009, Trans Tech Publications, Switzerland
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Created: Mon, 07 Jun 2010, 16:57:46 EST by Linda Aldridge

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