Développement d'un modèle d'efforts de coupe multi-opérations et multi-matériaux. Application au tournage du cuivre pur dans différents états métallurgiques.

Abstract : The cutting forces have to be known as accurately as possible in order to predict the characteristics of the workpiece as the geometry, the roughness or the material integrity.Numerous models have been yet developed; however, the majority cannot be used for the various industrial cutting operations and remain confined for a single machined material.The objective of this study is to develop a cutting forces model applied to any turning operation and taking into account some mechanical characteristics of the machined material.First, a geometrical model based on homogeneous transformations is presented. Then, the effects of some parameters, like the workpiece diameter, the cutting edge angle and the nose radius, are studied by using new cutting configurations, in order to improve the cutting laws.The multi-material aspect is approached by modifying the metallurgical state with thermo-mechanical treatments, especially by using the equal channel angular extrusion process in order to harden the material in the mass. Finally, the coefficients of the local cutting relations are compared to mechanical characteristics obtained from tensile and high compression tests.
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Sébastien Campocasso. Développement d'un modèle d'efforts de coupe multi-opérations et multi-matériaux. Application au tournage du cuivre pur dans différents états métallurgiques.. Génie mécanique [physics.class-ph]. Ecole nationale supérieure d'arts et métiers - ENSAM, 2013. Français. ⟨NNT : 2013ENAM0050⟩. ⟨pastel-00933906⟩

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