DefinePK

Abstract

The variable tooth thickness (VTT) hob is usually applied for longitudinal crowning work gear surface with twist free tooth flank. It is an important cutting tool for manufacturing the high precision helical gear. However, the manufacturing process fora VTT hob has not investigated yet. Therefore, in this study, we proposed a method for generating profile of VTT hob by using form grinding wheel on CNC grinding machine. A mathematical model for the tooth profile of VTT hob is established by setting the center distance between the grinding wheel and hob as a second order function of hob’s longitudinal feed movement. A numeral example is presented to illustrate and verify the merits of the proposed form grinding method.