Numerical Simulation Of Quenching Process Of Bevel Gear Under Strong Constrained Condition And Distortion Minimization

To the deformation of the workpiece in the process of heat treatment, theresearchers around the world have invested substantial resources to research, withthe development of computer technology, the researchers began extensive use offinite element simulation to study how to control the deformation of the heattreatment process. For the deformation for complex workpieces such as hardeningof bevel gear, the quenching process simulation of bevel gear was carried based onlarge-scale finite element software ABAQUS. Analyse the temperature distributionlaw and the bevel gear quenching deformation characteristics, and put forward areasonable molded quenching distortion control program.First, according to the actual quenching process of the bevel gear, somesimplified to determine the material of the thermal parameters of the mechanicalproperties. And in this model the martensitic phase transition latent heat was takeinto account and thermal expansion coefficient in the quenching process was testedto establish the bevel gear quenching finite element model. ABAQUS/Standardcalculation of bevel gear workpiece temperature field and analysis of the location ofthe bevel gear workpiece temperature variation in the quenching process wasperformed, and the prediction and the simulation results of the temperature field onthe martensite transformation process was carried.In addition, the temperature field simulation result was set as a predefined fieldof stress and strain fields in the bevel gear hardening process simulation, andanalyze residual stress distribution. Analyze the deformation of the bevel gealobserved in the quenching process in the thermal stress and stress together producedunder the bevel gear quenching. Analysis of plastic strain generated in thequenching process was performed, and determinate the plane warping (or concaveheart) deformation and tooth deformation.Finally, according to the deformation characteristics of the bevel gear of theworkpiece in the quenching process, simulate the molded quenching process ofbevel gear, and the analysis of the mandrel, pressure bed load and the way of loadon the bevel gear quenching deformation is performed. Comprehensive comparisonof simulation results to determine the appropriate core shaft size, the load of thepresses and loading mode. Simulate the effect of quenching distortion of carburizedlayer on the bevel gear contains the carburized layer bevel gear quenching of planewarping (or concave heart) deformation and tooth deformation, use the identifiedthe size of the mandrel, pressure bed load and the way of load to simulate the quenching presses to control the deformation hardening of bevel gear withcarburized layer, and put forward the optimal quenching distortion control program.