Development Of A Virtual Experimental System For Hub Spinning Based On ABAQUS

The development and application of the spinning technology of aluminum alloy wheels is an important part of meeting the current development requirements of automobile "lightweight".In order to further promote the development of the wheel spinning virtual forming field,improve the efficiency of analyzing different types of products,and shorten the research and development cycle,this paper uses ABAQUS to numerically analyze and analyze the hot spinning process of aluminum alloy wheels considering temperature effects Second development was carried out in the pre-processing modeling stage.The research contents are as follows:Firstly,the constitutive relationship of the material is established to reflect its deformation behavior under different working conditions in the numerical simulation.Based on the analysis of the advantages and disadvantages of the existing constitutive models,two methods,direct input method based on ABAQUS and BP neural network,are proposed.Based on the existing experimental data,two methods were used to predict the material constitutive relationship under non-experimental conditions.BP neural network was used for error analysis.Secondly,the thermal-mechanical coupling model of aluminum alloy wheel hub hot spinning was established in ABAQUS environment,and the stress and strain distribution of the workpiece surface after forming was analyzed.The spinning process of aluminum alloy wheel hub was analyzed and the process parameters needed for simulation were selected.On this basis,the hot spinning forming process of the hub under ABAQUS environment was systematically studied.After solving the model,the stress-strain distribution of the workpiece surface was obtained by combining the different stages of the forming process and the stress-strain values of the inner and outer surfaces after the forming.Thirdly,the influence of different process parameters on the forming quality of hub hot spinning was analyzed.The wall thickness deviation,inner diameter deviation,uplift height and rotary pressure were selected as the evaluation indexes,and the finite element models with different process parameters and different schemes were numerically simulated by single factor analysis method to obtain the influence rules.The causes of defects such as material reverse extrusion and local thinning were analyzed and summarized in the forming process,and the solutions were put forward,which provided a basis for the effective formulation of the forming process.Finally,based on Python language,a special module is built for the modeling stage of hub hot spinning pretreatment in ABAQUS environment.Use RSG Dialog Builder to build GUI graphical interface and use Macro Macro to record and ABAQUS.rpy file to create Kernel Kernel scripts,complete the mutual response between scripts through simultaneous,and test the feasibility of module functions.