DefinePK

Abstract

A helical gear is crowned in both the cross-profile and longitudinal directions called a double-crowned gear. The tooth surface of the gear can be generated by hobbing, shaving, honing processes. In this paper, the hobbing process is used for double-crowning the tooth surface of work gear with three different hobbing methods included conventional method, variable tooth thickness (VTT) method and modifying the work gear rotation angle method. A computer simulation example is implemented to compare the meshing-conditions, contact ellipses, and transmission errors under various assembly errors of the double-crowned gear pairs that are generated by the three hobbing methods.