Stability Criteria of Flexible Details Milling Available to Purchase

The vibrations inevitably occur while milling of the details with insufficient rigidity like the turbine blades for engines and various propulsion systems. This effect is undesirable as it decreases accuracy and the machined surface quality. The vibrations suppression is realized by applying additional damping or by choosing cutting conditions ensuring the process stability. In general the problem is solved by the determination of the process stability lobes. This criterion assumes that process is stable if the regenerative vibrations of tool or workpiece are damped. The additional criterion is discussed in the paper — the roughness of the machined surface. For this purpose authors elaborated the algorithm of the numerical simulation of milling process, considering the dynamics of tool and workpiece and applying the algorithm of machined surface geometrical modeling that takes into account the delay mechanism inherent to the process. The numerical solution of the simplified model in the given paper is considered. The Poincare’s maps of the vibration amplitudes, the machined surface errors, and the cutting force magnitudes depending on cutting conditions are presented. Authors conclude, that in general the vibration stability while milling process is not the absolute quality criterion. The combination of the developed criteria is introduced.