Optimisation of tool axis orientation in 5 axis machining taking into account kinematical constraints

After presenting the main difficulties related to machining 5 axes machining within the context of HSM, we present a surface model of 5-axis trajectories allowing taking into account geometrical and kinematical constraints. This model is integrated in an optimization scheme in order to maximize the productivity while ensuring the expected geometrical quality. A case of application is detailed, illustrating the modification of the tool axis in order to improve axis kinematical behavior during the tool path follow-up.