Numerical Simulation And Experimental Research On Precision Forging For Spline Gear

There are many urgent problems to be solved in the research of precision forging of gear parts. In the past, the research on the precision forging of gear parts is mainly in the form of internal or external teeth. The parts where the spline gear is different from the general toothed members are its both internal and external splines, which greatly increases the difficulty of its precision forging. It is a new attempt to explore the precision forging of internal and external teeth parts, which has certain guiding significance and application value to the theoretical research and practical production.In this paper, many kinds of precision forging schemes of internal and external spline gears were studied, also, the precision forging process that formed the internal and external teeth well was carried out and the forming mould that could be used for the actual production of the mold was designed. The forming process was numerical simulated by Deform-3D software, and the precision forging process was analyzed from the parts of the filling forming, equivalent stress, equivalent strain, temperature field, forming force and so on. In addition, the effects of the temperature and the forming speed of the ring blank on the forming process were explored. After the actual production die was simplified, the experimental die for the precision forging of the spline gear was designed and processed,and the experimental research was carried out.The simulation results showed that the precision forging process of spline gear could be divided into three stages. The internal and external spline gear forming was well with the reasonable and uniform equivalent stress and equivalent strain distribution, and the total forming force was very small. Through analyzing the simulation and experimental results, it could be found that the internal teeth forming of this spline gear was more difficult than that of the external teeth. But the usage of the shunt diversion could not only make the internal teeth formed well, but also reduce the total forming force significantly.The experiment results further verified that the process and mould could greatly improve the filling effect of tooth end corner portion with difficult forming.