Dynamics of Rotary Milling According to Group Scheme of Obtaining Discontinuous Chips

The forces, oscillations, or vibrations arising in the process of cutting must be taken into account, when optimizing any process operation or process. One of the high-performance machining processes is rotary cutting. However, the presence of an additional rotation of cutting elements decreases the rigidity of rotary tools, increases the variability of the operating forces, which require studying vibration dynamic phenomena at rotary processing. Rotary milling, being an intermittent cutting process, increases the possibility of obtaining discontinuous chips. The cutting tool operation according to the group cutting scheme is also used for efficient chip breaking. The measurements were carried out using a dynamometer and a spectrum analyzer. The obtained results reflect the dynamics of the rotary milling process and qualitatively coincide with the dynamic phenomena at conventional face milling and rotary turning. However, at the same time, we revealed characteristic features predetermined by the operation of the toothed cutting element according to the group cutting scheme.