DefinePK

Abstract

The face load factor KH, which in rating equations represents the load distribution over the face width in meshing gears is one of the most important items for a gear strength calculation. In this study, by implementing various profile and lead modification, the load distribution factor will be calculated to select the optimal profile and lead modification values through KissSoft machine design software for the same input parameter. Based on the KissSoft results the optimal profile and lead modification values are taken to avoid gear tooth damage by reducing the load distribution factor. The effects of the profile and lead modifications (Tip and root relief, Helix angle modification, End relief and longitudinal crowning) and corresponding load distribution factors and gear strengths are illustrated with and without profile and lead modification with the same input parameters. By providing optimum lead modifications, kHb value reduced from 1.80 to 1.1. i.e. 39% load carrying capacity increased and Hertzian stress value reduced from 1860 N/mm² to 1275 N/mm² i.e. 31% stress reduction.