LE ROLE DE LA SIMULATION DANS LE DEVELOPPEMENT DE NOUVELLES PIECES REALISEES EN THIXO- MOULAGE ET AUTRES PROCEDES D'INJECTION SOUS PRESSION

摘要

The development of suspension and framework parts in heal treatable and weldable cast aluminium frequently necessitates the use of injection processes under pressure such as squeeze casting, thixocasting or high pressure die casting improved by the use of vacuum. Time limits for adjustments, tooling costs and imposed specification sheets imply an almost systematic use of simulation. To account for the particularities of these casting processes with regard to thermal exchanges or rheological behavior; the corresponding software must use specific algorithms. The models defined in the PAM-CAST/SIMULOR software are described and examples of calculations on test bars and real parts are provided. A good correlation between simulation results and observed reality makes this an invaluable tool to integrate in the design chain of these new parts.