Abstract:
In order to solve the not enough filling problem of the gear blank with ribbed plate under the original closed hot precision forging process scheme, the metal flow was simulated with the help of Deform-3D software, and the reason of not enough filling were found in the original process. On this basis, the process was improved and verified by experiment. Results show that the deformation of original process is too large, the hitting energy consumption is too fast and the hitting power is insufficient in final forming stage, these lead to the dissatisfaction of the mold filling. A modified closed hot precision forging process with pre-forging operation is proposed. The numerical simulation results of the modified process show that the filling of the forge piece is full and no defects are found. Experimental results are in accordance with the simulated ones.