Numerical Simulation Of Stamping Forming For The Lower Part Of Cowl Panel Based On Autoform

After entering the21st century, the auto industry has developed rapidly, nearlybecoming the pillar industry of the country.To the car itself, it is about60%above areproduced by stamping technology of stamping, stamping process which indirectly led tothe people’s attention, and also promotes the development of forming finite elementtheory. With the maturing of finite element theory and actual punching test limitations,more and more scholars have begun to shift direction to depend on the whole finiteelement simulation of sheet metal forming process to conduct a feasibility analysis.Which not only reduce production costs, but also can greatly reduce the time for design,this will no doubt bring new dawn for Stamping processing.This article is based on the deep understanding of the finite element method andfinite element simulation software. Through analyzing different software’s functionmodules, and then combined with the actual parts. After totally consideration, determinedto developed by AF4.6sheet metal forming simulation software. After the simulationanalysis results will in automobile product development design and mold developmentprocess guidance role. This paper carried out to the end of the main research contents arethe following:1. The Geometry based on AF generator module for drawing and flanging processunder specific to add. Drawing process to determine the stamping direction, in theprocess of forming the product more complex boundary process, simplify the difficulty ofstamping. At the same time to the forming process of the blank holder ring shape design,make its whole shape is close to its shape parts, reduce the depth of drawing. Rim and finally to the pressure boundary populated parts, making it a drawing as a whole as abump in the process of deep drawing die model, at the same time for integratedoptimization of the process add rounded corners and borders. Flanging process mainlydetermine the flanging rounded corners and flanging wall tools, at same time to optimizeit.2. The whole process of the dash panel lower compactions numerical simulationanalysis. After the preliminary forming simulation calculation, from the simulation resultsfound in the cloud, the forming of local parts are wrinkling and cracking defects occurred.In order to avoid defects, in the subsequent experiment simulation process, through therounded the over-consumption of drawing die for global and local optimization, fordrawing the blank-holder force in the process of adjustment, at the same time with the useof draw-bead, ensure the quality of the whole forming process of forming. Avoid largerdefects. Through orthogonal experiment and same use the gray correlation method tomake sure of the optimal forming parameters. Finally, the flanging part flangingsimulation has been done3. Based on AF software respectively to the dash panel lower parts at the end of thedrawing and flanging process of spring-back simulation. According to the simulationresult of spring-back after you can see at the end of the drawing process of fabrication ofspring-back amount is larger, local boundary rebound effect is bad, the relative error isbigger. For spring-back simulation results, therefore, compensate the spring-back in theAF, through forming the initial shape of parts to adjust, optimize the die surface and thecutting edges, effectively control the spring-back error, eliminate due to large amount ofspring-back parts processing defects. Also at the end of the flanging spring-backcalculated and compensated, eventually get satisfactory simulation results.