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Analyse expérimentale et numérique du contact à l'interface outil-copeau lors de l'usinage à grande vitesse des métaux

Abstract : The study relates to the characterization of the tool-chip interface during the high-speed machining of metals. The existing numerical approaches do not generate good correlations of the process variables, such as the cutting forces and the shape of the chip. Recent studies show that the determination of an interfacial law according to the contact parameters (contact pressure, sliding velocity and interfacial temperature) is necessary to describe more precisely the process parameters. Experiments were carried out on the upsetting sliding test that reproduces the mechanics and thermals contact conditions of the HSM process at the tool tip. This specific device has been adapted and the antagonists have been modified for this study. A friction law according to the contact pressure, the sliding velocity, and the interfacial temperature was defined for the tribological system AISI 1045 steel / uncoated carbide. This law implemented in a numerical model of orthogonal cutting (developed in Abaqus) offers interesting improvements.
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https://hal-uphf.archives-ouvertes.fr/tel-03021067
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  • HAL Id : tel-03021067, version 1

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Julien Brocail. Analyse expérimentale et numérique du contact à l'interface outil-copeau lors de l'usinage à grande vitesse des métaux. Mécanique [physics.med-ph]. Université de Valenciennes et du Hainaut-Cambrésis, 2009. Français. ⟨NNT : 2009VALE0009⟩. ⟨tel-03021067⟩

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