Finite Element Analysis Of Resilience Performance In The Sheet Metal Forming Of A Car Side Pillar

Sheet metal forming is a relatively common processing technology in mechanical manufacturing,which mainly includes shearing,stamping,cutting,bending and so on.At present,there are abundant researches on stamping forming problems at home and abroad,but there is still a lack of research on stamping forming of drum cars in side pillars of carriages.This article mainly considers the stamping and forming of drumshaped car sheet metal.Through the simulation analysis of stamping springback using ABAQUS software,some relevant change mechanisms of the rebound value of the object are found.The specific research content of this article is as follows:1.Model a simple single side column structure and conduct a stamping rebound test on it.The simulation result of stamping rebound is obtained.It is found that the additional torque transferred to the inertial axis during loading cannot be eliminated,resulting in uneven shear Deformation and warpage in molding.In order to better overcome these problems,a drum-shaped car side pillar structure was designed.That is to say,the single side column is connected with a cross beam,and the cross beam is evenly distributed between the two single side columns.The cross-sectional size of the cross beam is also Z-shaped,and its web height is the same as that of the single side column,and the length is about single One-sixth of the length of the lateral column structure.2.According to the relative relationship between the stamping object and the mold,two stamping dies,the overall structure domain and the partial structure domain,are constructed.The stamping simulation of the object was carried out under the two stamping dies respectively,and the simulation results were compared,and finally the local structure domain stamping dies were selected.3.Use the controlled variable method to study the rebound characteristics of the object.In the case of determining the angle of each mold,the tangential friction coefficient between the object and the mold and the normal stiffness factor between the object and the mold are respectively given,and the rebound value of the object is calculated.In the article,a total of five groups of different mold angles,three different tangential friction coefficients and three different normal stiffness factors are selected for simulation,and the rebound value of the object is obtained.In order to better see the law,under each mold angle,control the tangential friction coefficient,and give a broken line graph of the springback value versus the normal stiffness factor.4.Use the rebound value of the object calculated by simulation and the mathematical geometric relationship between various variables to calculate the bending angle of the object after rebound.After simulation analysis,the following conclusions are finally drawn:a.The finite element analysis of the resilience performance in the sheet metal forming of the side column of the carriage belongs to the finite element analysis of the strongly nonlinear category of problems,which is a relatively complex analysis type.b.The main factors affecting the rebound value of the object are the bending angle of the mold,the tangential friction coefficient between the object and the mold,and the normal stiffness factor between the object and the mold.The final result of this paper will have a clear guiding role for the simulation of sheet metal stamping and forming,and also provide some relevant data for the actual process processing and production.