Study On Simulation Technology Of Forming Process Of Automotive Sheet Metal Parts

Under the premise of ensuring safety,the concept of automotive lightweighting refers to the reduction of overall body weight.Since the body is mostly made of sheet metal parts,the high strength and low weight of high strength steel can be used to reduce the weight of the body.However,it is difficult to guarantee the forming quality of sheet metal parts due to the material characteristics of high-strength steel when the sheet metal parts are stamped.Therefore,a full-process simulation of the stamping process can be performed and the simulation results can be analyzed to give an optimization plan to improve the forming quality and accuracy of high-strength steel.The focus of this paper is on the stamping and forming process of sheet metal parts of automotive seat frame side panels.Through the simulation,the defects that may occur are predicted,the combination of die and process parameters is optimized,and the springback is predicted and controlled.The details of the study are as follows:(1)Stamping and forming process design and simulation.By studying the stamping and forming technology of sheet metal parts,a reasonable design of each stamping process is made.By studying the edge plate processability and structural characteristics of the seat frame,so as to develop a reasonable stamping process.The reasonableness of these processes is tested through simulation experiments so as to improve the production efficiency.Using the plate forming theory and numerical simulation methods,the stamping process of the side panel material can be simulated and its processing quality can be evaluated to ensure compliance with production standards(2)Stamping and forming quality analysis and optimization methods.Through the study of quality problems in the stamping and forming process of sheet metal parts,some common problems are found.In order to achieve the purpose of eliminating cracking and reducing wrinkling,it is necessary to improve the forming quality by changing the shape structure of the material,increasing the process cutout,improving the design of the stamping die,and adding the structure of the deep drawing rib.Through optimization,not only can the cracking and wrinkle reduction be effectively eliminated,but also the overall quality of the product can be significantly improved.Study and analyze the influence of relevant process parameters on molding quality,and give the maximum value of each parameter.(3)Research and control of the rebound law of stamping.Research on the rebound of the edge plate,analyze the main factors affecting the rebound,such as material,structure,material thickness and process parameters.An orthogonal test is conducted to select the most reasonable combination of process parameters with the lowest maximum rebound as the target.The optimized mold and the best combination of process parameters are used for sample production,and thesamples are tested to prove that the simulation results are accurate and the products meet the production requirements...