The FH hypoid gear is mainly studied. Firstly, the tooth surface modeling is carried out by cutting simulation, and the gear tooth geometric contact analysis is carried out to obtain the tooth surface transmission error. At the same time, according to Hertz contact theory, the meshing contact area with actual contact boundary is obtained. Then, the tooth surface error sensitivity analysis (tsesa) is analyzed by adjusting the gear processing parameters, and the nonlinear tooth surface error sensitivity matrix function is established. Finally, the ease off design is carried out on the conjugate tooth surface of the pinion to obtain the target tooth surface of the pinion, and the adjustment amount of each processing parameter is obtained according to the error sensitivity matrix function of the tooth surface.
With the rapid development of China’s automobile industry, higher requirements are put forward for the comfort and reliability of the automobile. The drive axle affects the power transmission performance of the vehicle to a certain extent, while the performance of the automobile drive axle will affect the overall performance of the automobile. There are still some problems to be solved in the design and research of hypoid gears at home and abroad. Therefore, the research content of this paper is high-performance drive The tooth surface design and Realization of FH hypoid gear with moving bridge.
FH hypoid gear tooth surface modeling. According to the meshing principle of gears and the machining method of hypoid gears, the tooth surface equation of a pair of paired teeth is obtained. The tooth surface model is obtained by the position relationship and coordinate transformation relationship between cutting edge and cutter head, cutter head and imaginary profile wheel, imaginary profile wheel and workpiece, big wheel and small wheel. The accurate tooth surface model will lay the foundation for the subsequent contact analysis and design.
Tooth surface contact analysis of FH hypoid gear. The TCA mathematical model of hypoid gear is established. The mathematical model can simulate the position, shape and transmission error curve of the contact mark of the gear under no load or no-load conditions. The traditional TCA model needs complex curvature calculation to calculate the contact mark on the tooth surface, which can not reflect the real situation of the tooth contact. A new tooth contact simulation method will be proposed in this paper, which inherits the above advantages and can also obtain the accurate instantaneous contact boundary and the points on the long and short axis of the instantaneous contact ellipse. The simulation results are verified by ABAQUS software.
Tooth surface error sensitivity analysis of FH hypoid gear. The tooth surface error sensitivity analysis is carried out to analyze the sensitivity of the tooth surface error at different positions to each processing parameter. The sensitivity function of each position of the tooth surface relative to different machining parameters is accurately calculated and fitted, and then the accurate tooth surface error sensitivity function matrix is obtained. The influence law of the tooth surface processing parameters on the tooth surface is obtained.
FH hypoid gear tooth surface active design. A ease off active design method for paired tooth surfaces is proposed. According to the working performance requirements of the gear, the coverage and track direction of the contact marks are preset. Secondly, based on the theoretical tooth surface of the big wheel, the appropriate transmission error curve is selected and the conjugate tooth surface of the small wheel is obtained according to its motion law. The objective tooth surface of the pinion is obtained by ease off design of the optimal matching tooth surface on the conjugate tooth surface of the pinion, and the adjustment amount of each machining parameter is obtained according to the error sensitivity matrix function of the tooth surface.
This paper summarizes a whole set of contents from modeling to active design of FH hypoid gears, and discusses some defects in active design, so as to further improve the working performance of quasi double faced gears.