Correction of tooth surface deviations for aero spiral bevel and hypoid gears

To satisfy the requirement of high precision of aero spiral bevel and hypoid gears, considering some inevitable error sources during machining, as well as easy operation and cost saving, a novel tooth surface deviation correction method is proposed. With this method, the mathematical model of the modified theoretical gear tooth surface is established to restore the real gear member via measurement data. According to which, subsequently, the theoretical pinion is redesigned so as to provide the nominal values of pinion tooth surface for correction. Then, to compensate the deviations of the real pinion tooth surface from the redesigned one, the corrective machine settings are optimized. By this, the correction can be conducted on the pinion only. At last, a numerical example of a hypoid gear set by SGM (spiral generated modified-roll) method is presented to demonstrate the proposed approach.