Involute Helical Gear Parameterized Modeling Based On UG And Study Of Gear Modification

This paper firstly starts from the rack of processing gear engagement theory, derived the exact tooth profile curve of the involute cylindrical helical gear, and then along the spirals scan helical spur gear model, in order to realize a helical gear parametric modeling.Based on UG6.0modeling platform, verify the theoretical derivation of the tooth profile equation parameters of the helical gear generated along the spiral scan, its various components in accordance with the assembly of the relationship between integrated gear engagement system, and a motion simulation and interference, inspection, in line with the actual requirements. Further, using the EXP file from UG Expression Builder and VB interface builds a visual gear model interface, by entering a different basic parameters to quickly generate new gear model visualization parameters of helical gear built in VB environment mode.In view of the involute helical gear meshing partial load, stress concentration in the process of using unreasonable, it should be modified on the gear. By comparison and analysis gear modification forms and methods of computation, a drum-shaped modification is more fit to this study. And deducing the drum-shaped tooth profile curve and the guide line equation, then generating drum-shaped modification after the model. To consider the deformation of the skew and tooth, in-depth study of gear engagement shaft parallelism and bearing deformation to the teeth meshing contact stress and bending stress.At the same time, by using the seamless data interface of UG6.0and ANSYS13.0, the assembly model generated in the UG6.0software is imported into the ANSYS WORKBENCH13.0. Using the ANSYS WORKBENCH13.0with powerful analysis capabilities for solving the contact stress and bending stress. Standard meshing of theoretical calculations were carried out with ANSYS analysis values and ANSYS analysis compared before and after the modification, and research the effects to consider the gear mesh parallelism tolerance, bearing span of the gear meshing to form curves for this production and research provide some reference.