Physics – Classical Physics
Scientific paper
2009-08-10
Assises MUGV 200, NANTES : France (2008)
Physics
Classical Physics
Scientific paper
The determination of the stiffness center of a machine tool is a major element for knowing the dynamic behavior of this one. This stiffness center can be obtained from a static characterization of the machine tool. For an operation of turning, we present an experimental protocol to determine the stiffness matrix, then by inversion, the associated flexibility matrix. This step makes it possible to establish the privileged directions of the movement associated with the maximum and minimal stiffness as well as the stiffness center. Through this step, it is observed that, at the time of an operation of turning, the movement of the point of the tool is carried out according to an ellipse located in a tilted average plan compared to the machine spindle. This movement is linked with the self-excited vibrations. This analysis could be exploited and transposed in the case of the High Speed Machining. It will make it possible to predict various aspects of machining related to the behavior of the tool in the process of cut.
Bisu Claudiu-Florinel
Cahuc Olivier
Darnis Philippe
Gérard Alain
K'Nevez Jean-Yves
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