The Contact Analysis And Profile Modification Of The Involutes Gear

The involutes gear is used in many industries such as the manufacturing, mining, and metallurgy. The contact state of gear teeth seriously affects the mesh between gears and dynamics capability, so it is very important to study the static and dynamic contact performance of the involutes gear.Based on the equation of tooth outlines, gear tooth parameters are computed, and a parameter modeling method in ANSYS software is also proposed. Changed with contact ratio and friction parameter, the static contact stress distributing of involutes gears is discussed in details. Compared with the Hertz method, the result is perfectly accurate.The parametric loadings, solutions and displays of post-treatment are implemented by using FEM commands of ANSYS which are managed by the APDL program language. All the procedures of analysis are parameterized, which is the most advanced technique of batch. During the whole process, repeatedly analyzing different dimensions and loads can be conveniently realized by modifying parameters, which is more efficiently and economically.Based on the explicit dynamical program ANSYS/LS-DYNA, the dynamic contact analysis model of gears is built. The changed tooth contact stress along with the contact time is obtained. The result of the dynamic contact analysis is more obvious than the static contact analysis.According to the meshing theory and coordinate transformation, the responds of meshing point on the condition of error meshing is obtained. Based on the above analysis results, the contact stress distributing characteristics in fixing error and manufacture error is discussed in details. And it shows that the result is perfectly coincident with the fact of involutes gear contact.Furthermore, formula is provided for determining the profile modification parameters of meshing teeth for spur gears with manufacturing error. Corresponding method for determining the parameters is also proposed. After analyzing the contact stress trend and the meshing line deformation by using the finite element program ANSYS/LS-DYNA, it is obviously that the contact status of gears can be improved.