The Research On Process Measures To Improve Filling Ability Of The Gear Shaft By Hot Forging

The gear shaft is general machinery, especially the one of the important parts in the engineering and mechanical transmission with high transmission efficiency, compact and long life a number of advantages. Cutting gear shaft of the current mode of production has been gradually replaced by precision forming process, and have achieved good results. Dimensional finite element numerical simulation gear shaft of the precision forging application, you can get plastic deformation behavior of deformation process, the flow pattern, temperature change, the change of geometric dimensions and shape geometric quality and defects, mold loads, for the process The choice of parameters and mold design as well as in production using this technology to provide detailed technical information and theory to guide and mold design and manufacturing cycle can be shortened to improve the reliability of the mold.In this paper, on the basis of pre-project studies, analysis of the gear shaft forging forming process of filling a variety of measures and to improve the experimental validation studies. Use CAD software to create three-dimensional model of the forging and die, on the gear shaft hot forging process simulation analysis using the finite element numerical simulation the software Defrom-3d. To analyze and summarize the main factors to affect the filling process improvement. Improvement program designed three different groups of preformed shapes, different pre-forming the shape of the gear shaft forging forming simulation analysis, forming according to the simulation results show the situation to find a suitable preformed shape.Continue to explore the advantages of the shunt method, the mold structure has been improved, using the die floating mold structure to carry the gear shaft forging forming simulation, analysis convex mold structure of the cutting angle, float speed tooth filling, forming power situation, and strive to ensure that the overall filled at the same time to improve the gear shaft toothed upper and lower end of the fill, which gives the requirements to meet the gear shaft forging forming mold structure. In order to improve material flow, prompting the tooth part of the material of the uniform flow, this paper also use the principle of local cooling control to the corresponding numerical simulation. Appropriate preform shape under cooling, and cooling range.According to the results of numerical analysis, design and processing gear shaft forging forming experimental mold, preform and the mold structure of non-isothermal forging of steel specimens to improve the experimental. Comparative analysis of experimental results and numerical simulations show that both in good agreement, verify the reliability of the numerical simulation results. Based on the numerical simulation and experimental study, instructive suggestions are proposed for practical process.