MODELLING OF THE 3D MACHINING GEOMETRIC DEFECTS ACCOUNTING FOR WORKPIECE VIBRATORY BEHAVIOUR

In this paper, we present a three-dimensional manufacturing tolerancement model. Several researchers have interested to modelling the machining geometric defects. The most researchers are limited to kinematic and static study. Only some works are evoked the dynamic effects, especially the influence of the chatter phenomenon on the roughness of the machined surface. In this context, the paper presents a contribution for modelling and quantification of the machining geometric defects where the machining dynamic effects are considered. A developed method is established based on Homogeneous Transformation Method in subject to determine the kinematical deviations caused by part locating and relocating. The dynamic displacements due to clamping and machining forces are defined using Finite Element Method. The numerical results are then compared to published experimental results. (Received in July 2010, accepted in February 2011. This paper was with the authors 2 months for 1 revision.)