Numerical Simulation Of Stamping Forming Process For The Left And Right Shield Panel Of Bora Automobile

Stamping process is an important part in the process of automobilemanufacturing. It determines the surface quality and dimensional accuracy ofstamping parts. Not only does it affect the product manufacturing cycle, but alsodirectly affects the product quality, productivity and production costs. With the fiercecompetition in automobile industry and the improvement of automobile performancerequirements, more and more automotive industries focuses on how to develop highquality and low cost products in the shortest possible time. Whereas the traditionalstamping technology and mold design largely is depended on the experience of molddesigners repeatedly revised and debugging, it greatly decreases the efficiency ofmold development, extends the manufacturing cycle of automobile products, andwastes a great deal of manpower, material and financial resources, which apparentlyhas been unable to adapt to the current development trend of product development.With the rapid development of computer technology and finite element method,it provides an effective way for the automotive panel mold design and process design.The possible problems have been exposed during the mold design phase by usingnumerical simulation technology in sheet metal forming process, and improvements ina timely manner. The way of virtual simulation can not only reduce the number ofphysical testing, but also constantly optimize the mold design and process design,making the product design more reasonable. Thus, the application of numerical simulation technology can largely shorten the product development cycle, reduceproduct development costs, and improve product quality or market competitiveness. Inthis paper, the stamping process for left and right shield panel of Bora Automobile issimulated based on AUTOFORM software.Firstly, sheet metal forming and its application in industrial production aresummed up. The history and research status of domestic and overseas scholars ofnumerical simulation technology are recalled. It points out that numerical simulationtechnique is an effective method to solve the problem of stamping process. Then thekey technology and theory of finite element numerical simulation are systematicalintroduced, including elastic constitutive model, finite element algorithm, grids,adaptive technology and treatment of frictional contact problems. At the same time, italso describes the general steps of finite element numerical simulation of sheet metalforming process and the main characteristics of AUTOFORM software, which is usedin the finite element numerical simulation.Secondly，the stamping process of left and right shield panel of Bora Automobileis simulated based on AUTOFORM software. Through the orthogonal experimentmethod, the effect of different parameters on forming quality are studied, such asblank holder force, drawbead and friction coefficient. Using variance analysis, we canconclude that the effect of these factors on forming quality level, and elect the bestoptimization group of processing parameters.Finally, the springback mechanism, simulation methods and algorithms aresimply discussed. The effect of processing parameters on springback are exactlyanalysed, such as blank holder force, drawbead and friction coefficient. The researchresults show that the springback displacement decreases with the increasing of blankholder force, drawbead force and friction coefficient. Through the optimization ofprocess parameters, the forming properties of part are improved, and the springback iseffectively controlled.