Kinematical performance prediction in multi-axis machining for process planning optimization |
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Authors: | Sylvain Lavernhe Christophe Tournier Claire Lartigue |
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Affiliation: | (1) Laboratoire Universitaire de Recherche en Production Automatisée, ENS de Cachan—Université Paris Sud 11, 61 Avenue du Président Wilson, 94235 Cachan Cedex, France;(2) IUT de Cachan—Université Paris Sud 11, 9 Avenue de la Division Leclerc, 94234 Cachan Cedex, France |
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Abstract: | This paper deals with a predictive model of kinematical performance in 5-axis milling within the context of high-speed machining.
Indeed, 5-axis high-speed milling makes it possible to improve quality and productivity thanks to the degrees of freedom brought
by the tool axis orientation. The tool axis orientation can be set efficiently in terms of productivity by considering kinematical
constraints resulting from the set machine tool/NC unit. The capacities of each axis as well as NC unit functions can be expressed
as limiting constraints. The proposed model relies on each axis displacement in the joint space of the machine tool and predicts
the most limiting axis for each trajectory segment. Thus, the calculation of the tool feedrate can be performed, highlighting
zones for which the programmed feedrate is not reached. This constitutes as an indicator for trajectory optimization. The
efficiency of the model is illustrated through examples. Finally, the model could be used for optimizing process planning. |
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Keywords: | High-speed machining Multi-axis machining Inverse time Kinematical behavior Process planning |
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