The Experts below are selected from a list of 4671 Experts worldwide ranked by ideXlab platform
Claire Lartigue - One of the best experts on this subject based on the ideXlab platform.
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Characterization of 3D surface topography in 5-axis milling
Wear, 2011Co-Authors: Yann Quinsat, Sylvain Lavernhe, Claire LartigueAbstract:Within the context of 5-axis free-form Machining, CAM software offers various ways of tool-path generation, depending on the geometry of the surface to be machined. Therefore, as the manufactured surface quality results from the choice of the Machining Strategy and Machining parameters, the prediction of surface roughness in function of the Machining conditions is an important issue in 5-axis Machining. The objective of this paper is to propose a simulation model of material removal in 5-axis based on the N-buffer method and integrating the Inverse Kinematics Transformation. The tooth track is linked with the velocity giving the surface topography resulting from actual Machining conditions. The model is assessed thanks to a series of sweeping over planes according to various tool axis orientations and cutting conditions. 3D surface topography analyses are performed through the new areal surface roughness parameters proposed by recent standards.
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Model for the prediction of 3D surface topography in 5-axis milling
International Journal of Advanced Manufacturing Technology, 2010Co-Authors: Sylvain Lavernhe, Yann Quinsat, Claire LartigueAbstract:The paper deals with the prediction of the 3D surface topography obtained in 5-axis milling in function of the Machining conditions. For this purpose, a simulation model for the prediction of machined surface patterns is developed based on the well-known N-buffer method. As in sculptured surface Machining the feed rates locally vary, the proposed model can be coupled to a feed rate prediction model. Thanks to the simulation model of 3D surface topography, the influence of the Machining Strategy on resulting 3D surface patterns is analyzed through an experimental design. Results enhance the major influence of the tool inclination on 3D topography. Surface parameters used in the study are strongly affected by the variation of the yaw angle. The effect of the feed rate is also significant on amplitude parameters. Finally, the analysis brings out the interest of using surface parameters to characterize 3D surface topography obtained in 5-axis milling.
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Characterization of 3D surface topography in 5 axis milling
2009Co-Authors: Yann Quinsat, Sylvain Lavernhe, Claire LartigueAbstract:Within the context of 5-axis free-form Machining, CAM software offers various modes of tool-path generation, depending on the geometry of the surface to be machined. Therefore, as the manufactured surface quality results from the choice of the Machining Strategy and Machining parameters, the prediction of surface roughness in function of the Machining conditions is an important issue in 5-axis Machining. The objective of this paper is to propose a simulation model of material removal in 5- axis based on the N-buffer method and integrating the Inverse Kinematics Transformation. The tooth track is linked to the velocity giving the surface topography resulting from actual Machining conditions. The model is assessed thanks to a series of sweeping over planes according to various tool axis orientations and cutting conditions. 3D surface topography analyses are performed through the new 3D roughness parameters proposed by recent standards.
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Usinage de poches en UGV - Aide au choix de strat\'egies
arXiv: Other Computer Science, 2009Co-Authors: Kwamiwi Mawussi, Sylvain Lavernhe, Claire LartigueAbstract:The paper deals with associating the optimal Machining Strategy to a given pocket geometry, within the context of High-Speed Machining (HSM) of aeronautical pockets. First we define different classes of pocket features according to geometrical criteria. Following, we propose a method allowing to associate a set of capable tools to the features. Each capable tool defines a machined zone with a specific geometry. The last part of the paper is thus dedicated to associate the optimal Machining Strategy to a given geometry within the context of HSM. Results highlight that analyses must be conducted in a dynamical as well as a geometrical viewpoint. In particular, it becomes necessary to integrate dynamical specifities associated to the behavior of the couple machine/NC unit in the tool path calculation.
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5-axis High Speed Milling Optimisation
Revue Internationale d Ingenierie Numerique, 2006Co-Authors: Christophe Tournier, Sylvain Lavernhe, Claire LartigueAbstract:Manufacturing of free form parts relies on the calculation of a tool path based on a CAD model, on a Machining Strategy and on a given numerically controlled machine tool. In order to reach the best possible performances, it is necessary to take into account a maximum of constraints during tool path calculation. For this purpose, we have developed a surface representation of the tool paths to manage 5-axis High Speed Milling, which is the most complicated case. This model allows integrating early in the step of tool path computation the machine tool geometrical constraints (axis ranges, part holder orientation), kinematical constraints (speed and acceleration on the axes, singularities) as well as gouging issues between the tool and the part. The aim of the paper is to optimize the step of 5-axis HSM tool path calculation with a bi-parameter surface representation of the tool path. We propose an example of integration of the digital process for tool path computation, ensuring the required quality and maximum productivity
Gilles Dessein - One of the best experts on this subject based on the ideXlab platform.
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Optimization of pocket Machining Strategy in HSM
International Journal of Advanced Manufacturing Technology, 2012Co-Authors: El Bechir Msaddek, Zoubeir Bouaziz, Gilles Dessein, Maher BailiAbstract:Our two major concerns, which should be taken into consideration as soon as we start the selecting the Machining parameters, are the minimization of the Machining time and the maintaining of the high-speed Machining machine in good state. The manufacturing Strategy is one of the parameters which practically influences the time of the different geometrical forms manufacturing, as well as the machine itself. In this article, we propose an optimization methodology of the Machining Strategy for pockets of complex forms. For doing this, we have developed analytic models expressing the feed rate of the cutting tools trajectory. Then, we have elaborated an optimization method based on the analysis of the different critical parameters so as to distinguish the most suitable strategies to calculate the cutting time and define the machine dynamics. To validate our results, we have compared them to the experimental ones and also to those found in literature.
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Optimization of pocket Machining Strategy in HSM
The International Journal of Advanced Manufacturing Technology, 2011Co-Authors: El Bechir Msaddek, Zoubeir Bouaziz, Gilles Dessein, Maher BailiAbstract:International audienceOur two major concerns, which should be taken into consideration as soon as we start the selecting the Machining parameters, are the minimization of the Machining time and the maintaining of the high-speed Machining machine in good state. The manufacturing Strategy is one of the parameters which practically influences the time of the different geometrical forms manufacturing, as well as the machine itself. In this article, we propose an optimization methodology of the Machining Strategy for pockets of complex forms. For doing this, we have developed analytic models expressing the feed rate of the cutting tools trajectory. Then, we have elaborated an optimization method based on the analysis of the different critical parameters so as to distinguish the most suitable strategies to calculate the cutting time and define the machine dynamics. To validate our results, we have compared them to the experimental ones and also to those found in literature
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Modeling and simulation of high-speed milling centers dynamics
The International Journal of Advanced Manufacturing Technology, 2011Co-Authors: El Bechir Msaddek, Zoubeir Bouaziz, Maher Baili, Gilles DesseinAbstract:High-speed Machining is a milling operation in industrial production of aeronautic parts, molds, and dies. The parts production is being reduced because of the slowing down of the Machining resulting from the tool path discontinuity Machining Strategy. In this article, we propose a simulation tool of the machine dynamic behavior, in complex parts Machining. For doing this, analytic models have been developed expressing the cutting tool feed rate. Afterwards, a simulation method, based on numerical calculation tools, has been structured. In order to validate our approach, we have compared the simulation results with the experimental ones for the same examples.
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Modeling and simulation of high-speed milling centers dynamics
The International Journal of Advanced Manufacturing Technology, 2010Co-Authors: El Bechir Msaddek, Zoubeir Bouaziz, Maher Baili, Gilles DesseinAbstract:International audienceHigh-speed Machining is a milling operation in industrial production of aeronautic parts, molds, and dies. The parts production is being reduced because of the slowing down of the Machining resulting from the tool path discontinuity Machining Strategy. In this article, we propose a simulation tool of the machine dynamic behavior, in complex parts Machining. For doing this, analytic models have been developed expressing the cutting tool feed rate. Afterwards, a simulation method, based on numerical calculation tools, has been structured. In order to validate our approach, we have compared the simulation results with the experimental ones for the same examples
Xiuqing Hu - One of the best experts on this subject based on the ideXlab platform.
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5-axis CNC Whirlwind Milling Model for Complex Freeform Surfaces
2006 International Conference on Mechatronics and Automation, 2006Co-Authors: Xianzhong Yi, Shengli Fu, Jingkun Zhao, Xiuqing HuAbstract:Whirlwind milling model is a new milling technique proposed in this paper based on 5-axis CNC horizontal bed-type milling machines. The Machining Strategy of this model is to make a real-time adjustment of cutter orientation of whirlwind milling tool so as to create a close approaching envelopment to the surface being machined with the milling-tool rotational surface. Then, a full approach between these two surfaces can ensure maximizing the material removal on the machined surface at point of contact and improve the Machining quality. A whirlwind milling tool with standard-sized circular edge cutters is introduced to side-mill complex freeform surfaces. The fundamentals, kinematics relationship, cutter location equations and tool path generation about this new milling model are analyzed, and some real application is presented
José A. O. Simões - One of the best experts on this subject based on the ideXlab platform.
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The influence of finishing milling strategies on texture, roughness and dimensional deviations on the Machining of complex surfaces
Journal of Materials Processing Technology, 2003Co-Authors: António Ramos, Carlos Relvas, José A. O. SimõesAbstract:Abstract The objective of the study hereby presented consisted on the analysis of different finishing milling strategies of a complex geometry part containing concave and convex surfaces. The Machining quality was assessed through the comparison of surface roughness, surface texture and dimensional control parameters. Three typical milling strategies were studied: radial, raster and 3D offset. The tool-cutting parameters were maintained constant for all strategies tested. The 3D offset Machining Strategy evidenced to be the suitable one for the geometry model used within the study.
El Bechir Msaddek - One of the best experts on this subject based on the ideXlab platform.
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Optimization of pocket Machining Strategy in HSM
International Journal of Advanced Manufacturing Technology, 2012Co-Authors: El Bechir Msaddek, Zoubeir Bouaziz, Gilles Dessein, Maher BailiAbstract:Our two major concerns, which should be taken into consideration as soon as we start the selecting the Machining parameters, are the minimization of the Machining time and the maintaining of the high-speed Machining machine in good state. The manufacturing Strategy is one of the parameters which practically influences the time of the different geometrical forms manufacturing, as well as the machine itself. In this article, we propose an optimization methodology of the Machining Strategy for pockets of complex forms. For doing this, we have developed analytic models expressing the feed rate of the cutting tools trajectory. Then, we have elaborated an optimization method based on the analysis of the different critical parameters so as to distinguish the most suitable strategies to calculate the cutting time and define the machine dynamics. To validate our results, we have compared them to the experimental ones and also to those found in literature.
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Optimization of pocket Machining Strategy in HSM
The International Journal of Advanced Manufacturing Technology, 2011Co-Authors: El Bechir Msaddek, Zoubeir Bouaziz, Gilles Dessein, Maher BailiAbstract:International audienceOur two major concerns, which should be taken into consideration as soon as we start the selecting the Machining parameters, are the minimization of the Machining time and the maintaining of the high-speed Machining machine in good state. The manufacturing Strategy is one of the parameters which practically influences the time of the different geometrical forms manufacturing, as well as the machine itself. In this article, we propose an optimization methodology of the Machining Strategy for pockets of complex forms. For doing this, we have developed analytic models expressing the feed rate of the cutting tools trajectory. Then, we have elaborated an optimization method based on the analysis of the different critical parameters so as to distinguish the most suitable strategies to calculate the cutting time and define the machine dynamics. To validate our results, we have compared them to the experimental ones and also to those found in literature
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Modeling and simulation of high-speed milling centers dynamics
The International Journal of Advanced Manufacturing Technology, 2011Co-Authors: El Bechir Msaddek, Zoubeir Bouaziz, Maher Baili, Gilles DesseinAbstract:High-speed Machining is a milling operation in industrial production of aeronautic parts, molds, and dies. The parts production is being reduced because of the slowing down of the Machining resulting from the tool path discontinuity Machining Strategy. In this article, we propose a simulation tool of the machine dynamic behavior, in complex parts Machining. For doing this, analytic models have been developed expressing the cutting tool feed rate. Afterwards, a simulation method, based on numerical calculation tools, has been structured. In order to validate our approach, we have compared the simulation results with the experimental ones for the same examples.
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Modeling and simulation of high-speed milling centers dynamics
The International Journal of Advanced Manufacturing Technology, 2010Co-Authors: El Bechir Msaddek, Zoubeir Bouaziz, Maher Baili, Gilles DesseinAbstract:International audienceHigh-speed Machining is a milling operation in industrial production of aeronautic parts, molds, and dies. The parts production is being reduced because of the slowing down of the Machining resulting from the tool path discontinuity Machining Strategy. In this article, we propose a simulation tool of the machine dynamic behavior, in complex parts Machining. For doing this, analytic models have been developed expressing the cutting tool feed rate. Afterwards, a simulation method, based on numerical calculation tools, has been structured. In order to validate our approach, we have compared the simulation results with the experimental ones for the same examples
