Maximum feed rate is the fundamental approach to material removal rate (MRR) increasing for modern milling processes. The effectiveness of high feed rate milling strategy is practically verified; nevertheless, programming trajectories with high maximum feed in practice can result in unsatisfactory low average feed value due to milling path peculiarities for given part geometry. If that's the case, special approach to the toolpath programming should be utilized.
In this paper, cubic spline approximation to the initial trajectory is offered for toolpath specification. The specified algorithm was implemented in C++ code and milling process simulation was carried out on the basis of virtual machining emulation program.Simulation results show machining time reduction and several disadvantages concerned with cubic Bezier splines utilization. New approximation method that corrects the drawbacks is proposed on the base of current analysis.