Profile deviations in internal gear shaping

During the shaping process, the profile generated on the internal gear deviates from the theoretical profile even when the difference between the number of teeth on the gear and the cutter is large. This paper describes a method for simulating the shaping process while cutting the internal gear. For the first time, quantitative evaluation of profile deviation has been made possible by this approach. The results are adequately verified by experiments. A thorough analysis has been carried out on the simulated profiles and suggestions are made to reduce the deviation from the theoretical profile. © 1982.