Development and Geometric Optimization of High-Performance Face Mills for Chatter Suppression

In low-rigidity technological systems, face milling can cause undesirable vibrations, including forced and self-excited vibrations. These vibrations can be suppressed by selecting a mill with a variable tooth pitch. This paper analyzes existing face mill designs that implement this approach and describes the design of a developed mill with an adjustable tooth pitch. Experimental substantiation of the mill’s performance demonstrated that proper selection of the difference between adjacent tooth pitches reduces the fundamental harmonics of self-excited vibrations by a factor of 28.