Research On Heat Treatment Deformation Control Of Input Shaft Of GFE Converter

The GFE input shaft,which connected the Engine and the Transmission,is the core component of the power take-off assembly.And it is mainly used to transmit the torque and revs from the engine.However,during the actual working condition,the shaft with high hardness and great abrasion resistance is required.Thus,with the purpose of obtain better mechanical behavior and meet the practical application demanding,the heat treatment is needed for the input shaft.However,the deformation will generate when the shaft is heat treated,causing the local size of the shaft beyond the dimension limit and lead to the requirement of secondary operation which increases the cost and extends the producing periods.In the paper,the performance and corresponding influenced parameters of the GFE input shaft are studied for better controlling the deformation,maximum the efficiency of the heat treatment and provide the theoretical guidance for the similar workpieces.The major researches are obtained as follows:Firstly,the whole the process of the shaft heat treatment is analyzed.And the major influenced parameters which determine the deformation are proposed.Then,based on the proposed influenced parameters,the orthogonal test is utilized to establish the test scheme and to conducted the experimental test.The influenced parameters include the carburizing temperature,the quenching temperature,the cooling method,and the drawing temperature.Secondly,the comparison of the diameter of the shaft between the heat-treated shaft and the original shaft are conducted based on the experimental results.The experimental results are also selected as the samples to establish the BP algorithm and obtain the optimized configurations which helps to decreases the diameter change of the shaft based on the global optimization function of the BP algorithm.Then,the whole heat treatment process of the shaft is simulated by DEFORM.And the numerical result shows that the maximum stress has not beyond the yield strength during the all of the three stage which are carburizing,quenching and drawing thetemperature.Besides,the change of the shaft diameter during the whole process is also monitored based on the numerical results.Finally,the comparison of the numerical results and the experimental test are conducted.And the result shows that the deviation of the shaft diameter is lower than0.1mm which authenticates the present simulation model.Meanwhile,the result also indicates that the optimized parameters can effectively control the deformation of the shaft.