Research of Force-Fitted Gear : 4th Report, On the Improvement of Bending Fatigue Strength by Surface Rolling at the Root Fillet of the Force-Fitted Gear Tooth

Abstract

As are evident from experimental results of the 2nd report, bending fatigue limits of the force-fitted gears show lower values in comparison with those of the solid gears. In this paper, as an attempt to increase the bending fatigue strength of the force-fitted gears, surface rolling on the root fillet of gear tooth was adopted success fully. The following are the conclusions obtained : (1) By fillet surface rolling the bending fatigue limits are increased by 37% at the most suitable rolling conditions. (2) Whichever process, surface rolling or force-fitting, may be taken previously, the order of process has no influences on the bending fatigue strength, the bending static strength etc.