Design on Helical Gear Hobbing Machining Simulation System Based NX

To establish the link between geometric simulation and physical simulation model for gear hobbing,simulation approach of the hobbing process for the manufacturing of helical gears based on NX secondary development was put forward. General structure of helical gear hobbing simulation system was developed; the kinematics equation for gear hobbing cutting process was established; the creation processes of workpiece geometric entity,swept geometric entity of the hob tooth and undeformed chip geometric entity were described; The confirmation of the validity and accuracy of the proposed method has been accomplished by comparison between the produced helical gear gap normal profile and theoretical ones.