Driven spiral bevel gear is an important part in automobile, aerospace and other fields. The optimization of its production process plays a vital role in improving the overall technical level of the whole machinery industry. In this paper, the precision forging process and forming law of the driven spiral bevel gear are deeply and systematically studied, and the numerical simulation and physical simulation test analysis of the closed precision forging process of the driven spiral bevel gear are completed. The main conclusions are as follows:
- Through the isothermal compression test of 20CrMnTi gear steel, it can be seen that when the temperature increases and the deformation rate decreases, it is conducive to the full progress of dynamic recrystallization and the refinement of internal microstructure grains. At the same time, the deformation activation energy of 20CrMnTi gear steel is 411.45kj/mol. The deformation resistance model of the steel is established by analyzing the compression test data with MATLAB software.
- Through the simulation analysis and comparison of multiple groups of schemes of blank size and precision forging parameters of precision forging driven spiral bevel gear, the optimal precision forging process scheme is obtained: the precision forging temperature is 1000 ℃ and the friction coefficient is 0.3.
- Through the three-dimensional rigid plastic finite element numerical simulation of the precision forging process of the driven spiral bevel gear, the tooth shape deformation law in the precision forging process of the driven spiral bevel gear is revealed. At the same time, the effects of different friction coefficient, different forming temperature and different blank size on tooth filling are analyzed.
- Through the physical simulation test of the precision forging process of the driven spiral bevel gear, the metal flow law of the tooth profile in the actual precision forging process is analyzed. The metal flow law of the tooth profile filling in the physical test is basically consistent with the results of the numerical simulation, which confirms the feasibility and rationality of the precision forging process of the driven spiral bevel gear.
- The actual production verification of the optimization scheme is made according to the simulation parameters, which proves the rationality of the finite element numerical simulation and physical forming test conclusions of the precision forging process of the driven spiral bevel gear.