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Optimisation par la méthode des éléments finis du formage robotisé du verre

Abstract : To answer an increasing need for glass product manufacturing in both small and medium series, the first glass-blower robot was recently developed. In the face of this new technology, which particularly interests crystal glass-makers, expertise remains the main decision making element whic intervenes in the choices of the design and implementation of these new processes. Finite elements methods of this new blowing process were developed. After the analysis of the process and of theses stages, an initial sensibility study allowed to find the essential parameters for the success of the operation. Two characterization tests were also developed in situ in order to identify, by inverse method, the exchange coefficient by convection with the ambient air and the viscosity law function of the temperature. For the first test, the surface temperature calculated with a finite differences model is compared with analyses made by pyrometer in a point of a glass ingot in rotation. For the second, the elongation calculated with a thermomechanical finite elements models is compared with the elongation of a glass mass measured on a video recording. With the results of these identifications, an optimiser was developed to adjust virtually the forming parameters. A second optimization allowed to determine the initial shape of the parison, an essential parameter in the successful forming of a convex cylindrical vase. Finally, the numerical tools are validated during trial campains carried out in crystal glass-makers Val Saint Lambert (Belgium) and Rogaska (Slovenia).
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  • HAL Id : tel-03002064, version 1

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Christophe Maréchal. Optimisation par la méthode des éléments finis du formage robotisé du verre. Génie mécanique [physics.class-ph]. Université de Valenciennes et du Hainaut-Cambrésis, UVHC, (France), 2001. Français. ⟨NNT : 2001VALE0018⟩. ⟨tel-03002064⟩

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