Analysis of conditions for contacting tooth end mills with cylindrical piece

The theoretical formulas for determination of cutting time per one tooth and time of idling, when in time of end mill cutter rotation previous tooth already came out from the cutting area, and next one had not yet entered, were received. The ratio of this times in many respects determines the dynamic conditions of milling process. Influence of instrument's size and geometry, and also a milling conditions on cutting time per one tooth and time of idling was analyzed. Results of the analysis allow purposefully to change the conditions of excitation and relaxation of vibrations when milling thin-wall element, if its real rigidity and value of natural vibration period are known