Optimisation du perçage de multi-matériaux CFRP/Titane et/ou Aluminium

Abstract : The proposed research topic is a preliminary study to minimize costs of drilling operation in multi-materials stacks as CFRP/Al and CFRP/Ti. In order to minimize these costs, it is initially necessary to understand the cutting tools wear mechanisms and the phenomenon leading to the non-conformity of the drilled hole. In this way, drilling tests were carried out. The instrumentation of this tests allow to access to the cutting forces and to the temperature achieved during the cutting process.In association, analyses devices were used to monitored the holes quality. The cutting tools wear mechanisms were observed through scanning electron microscope. The access of the cutting edge profile, by the measures achieved on a numerical microscope, allows quantifying the tool wear.The temperature fields near the tool/chip interface influence significantly the tool life. They are difficult to reach by experimentation, but can be obtained using numerical simulation of the workpiece thermal solicitations. The model developed allow, by inverse method, to reach the hole wall temperature using the temperature reach at 4mm of it. The temperature field was obtained and the tendencies observed experimentally were confirmed by this model.
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Maxime Montoya. Optimisation du perçage de multi-matériaux CFRP/Titane et/ou Aluminium. Autre. Ecole nationale supérieure d'arts et métiers - ENSAM, 2013. Français. ⟨NNT : 2013ENAM0019⟩. ⟨pastel-00936176⟩

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