Contribution à l'étude expérimentale et à la modélisation de l'usinage des pièces de grandes dimensions : application au cas du taillage de dentures à la fraise-mère

Abstract : This work introduces a novel approach for a predictive model for hobbing process in order to improve the geometrical accuracy and quality of the manufactured part. An industrial case study of the generation of the teeth was simulated for prediction of effort. The calculation of the cutting forces is based on several steps: tool/part intersection step by means of a kinematic simulation of the process by CATIA, 2D numerical simulation of the process of the orthogonal cutting and finally the last step called ‘mechanistic simulation’ which uses the results of the other two steps for the prediction of cutting forces. This approach leads to model the 3D cutting force for hobbing process and appears as an interesting alternative to traditional mechanistic approach which requires a lot of experimental tests to determine the cutting force coefficients. Besides, we have proposed a predictive approach based on an analytical modeling of chip formation in finishing hobbing operation. The interest of the suggested approach is to be able to avoid machining tests in the case of this very complicated operation (huge dimensional parts, kinematic, chip formation process, etc...). Finally, the proposed model was applied to analyze the hobbing of larges parts (several meters) during finishing stage
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Naoual Sabkhi. Contribution à l'étude expérimentale et à la modélisation de l'usinage des pièces de grandes dimensions : application au cas du taillage de dentures à la fraise-mère. Autre. Université de Lorraine, 2015. Français. ⟨NNT : 2015LORR0261⟩. ⟨tel-01754546⟩

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