OPTIMAL TOOTH MODIFICATIONS IN FACE-HOBBED SPIRAL BEVEL GEARS

摘要

In this study a new method to introduce optimal tooth modifications in face-hobbed spiral bevel gears is presented. The goal is to minimize tooth contact pressure and angular displacement error of the driven gear. The optimal tooth surface modifications are introduced by the variation of head-cutter geometry and machine tool settings. The proposed optimization procedure relies heavily on the loaded tooth contact analysis developed by the author of this paper. A computer program was developed to implement the formulation provided above. By using this program the influence of head-cutter geometry and machine tool settings for pinion manufacture on maximum tooth contact pressure and transmission errors is investigated. The direct search method is applied to determine the head-cutter geometry and machine tool settings resulting considerably reduced tooth contact pressure and transmission errors.