Identification des sources de vibration en usinage : étude expérimentale et numérique

Abstract : The main objective of this project is furnishing information to clarify the vibrations physics in machining from orthogonal cutting. First chapter contains the machining process characterisation by means of cutting forces. We evaluate the piezoelectric dynamometers in frequency domain and the influence of assembly components. These evaluations reveal the dynamic measurements problems. At the end of this part, we propose a correction method of piezoelectric dynamometer measurements to frequencies higher than dynamometer bandwidth. Also, we present an application of the method. Second chapter comprises the understanding of vibration sources. We analyse specially the segmented chip formation because its excitation role is not clear in literature. Also, we consider the effects of regenerative excitations, which depend of interaction between cutting conditions and machine-tool dynamic response. Third chapter includes the experimental identification of vibration sources during machining. We have identified and characterized the segmented chip formation and the machine-tool dynamic.
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Luis Ricardo Castro Martinez. Identification des sources de vibration en usinage : étude expérimentale et numérique. Autre. Université Paul Verlaine - Metz, 2006. Français. ⟨NNT : 2006METZ024S⟩. ⟨tel-01752447⟩

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