Nouvelle méthode de génération de gammes de fabrication prenant en compte des paramètres économiques et environnementaux

Abstract : In manufacturing, the electrical energy consumption is considered as one of the major problems which are systematically related to the gas emission containing carbon dioxide and leading to the greenhouse effect. Studies based on the estimation of the machine tools energy consumption become the interest of researchers in recent decades.As a result, different models for energy estimating are developed in order to minimize the quantity of consumed energy. These models are either empirical or theoretical and are limited to taking into account the dynamic behavior of the cutting system during machining operations. The fundamental contribution of this doctoral thesis is the characterization of the nonlinear behavior of cutting and rolling forces during estimating the consumed energy by a machine tool. The developed approach is based on the determination of the variable cutting forces and bearings forces which are function of time. These forces are deduced by solving the equation of motion based on finite element method using Newark's method coupled with Newton Raphson's algorithm. These forces are used to calculate the power then the consumed energy by the axis feed, the spindle and therefore the machine tool. In order to validate our approach, the power and energy obtained from the model developed are compared with the power and energy obtained with an experimental device. A parametric study is carried out to focus on the impact of the variation of the cutting parameters on the value of the consumed power and energy. An interest is given for different types of defect (innerring spalling, outer ring spalling, eccentricity and unbalance) in order to study their impact on the spindle consumed power during approach and cutting phases under different rotating conditions. Particular attention has also been devoted to develop a global model for optimizing machine too lmovements that minimizes the consumed energy, the production time, the cost and the surface roughness with respect of the technological constraints.
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Anoire Ben Jdidia. Nouvelle méthode de génération de gammes de fabrication prenant en compte des paramètres économiques et environnementaux. Génie mécanique [physics.class-ph]. Université Paris-Saclay; Université de Sfax (Tunisie), 2019. Français. ⟨NNT : 2019SACLC028⟩. ⟨tel-02283158⟩

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