Modelling of cold compaction

Informazioni relative al progetto

MC2

ID dell’accordo di sovvenzione: BRPR980779

Progetto chiuso

Data di avvio 1 Dicembre 1998

Data di completamento 30 Novembre 2001

Finanziato da

• Specific research and technological development programme in the field of industrial and materials technologies, 1994-1998

Costo totale

Nessun dato

Contributo UE

Nessun dato

Coordinato da

Commissariat à l'Energie Atomique
France

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Risultati sfruttabili

Modelling of cold compaction ("MC^2")

The principal innovation of the project concerns the development of the simulation of the process of die compaction, the realisation of a prototype software and the description of the specifications of an industrial modeling tool. The numerical developments necessary for the development of the prototype software have been carried out. It has been demonstrated that the existing macromechanical models and the procedure for the determination of the input databases for the powder are suitable for the description of the process. No further R&D programme for the development of new models is necessary in order for the simulation to be widely used in industry. The industrial partners have evaluated the technical impact of the results of the project, in particular for producing new complex parts with zero defects through the use of the prototype simulation tool. It appears that the simulation can already be useful for some cases in order to increase the productivity of the PM part producers. For the development of the software, numerical developments have been carried out within the frame of the project. For instance, a new remesher has been developed and implemented within PreCAD®. This remesher allows the automatic optimisation of the number of elements and their shape in order to optimise the quality of the simulation and to minimise the computing time. New models suitable for the description of the behavior of the powder during pressing and sintering have been implemented in the frame of the project. In particular, a new thermoelastic anisotropic sintering model has been developed for the description of the sintering of ferrite pastes. This model has been implemented within the PreCAD prototype software. The packages have been validated through the simulation of several difficult compaction cases, and several technical aspects have been considered: - The computing time. - The accuracy of the simulation. - The robustness of the simulation. The compaction and sintering of different parts have been simulated in the programme.