The gear parametric modeling of the key issues is studied based on the generating method.With VC + +6.0programming tools
the 3dsoftware UG NX7.0secondary development
aparameterized module of gear is designed.The modified involute helical gear and all kinds of involute cylindrical gear precise 3Dmodeling are realized.With a hydraulic transmission with modified involute helical gear as an example
using this method can effectively improve the design efficiency