Design And Implementation In Light Weighting Of Three-piece Can

Metal can plays a very important role in the packaging market with its unparallelet economic advantage and good social benefit, and the light weighting technology has more and more aroused people’s attention. In this paper, the three-piece can, which specification is206/211/209x309, is selected as the object of study, focuse on structural optimization of end and bottom and thickness optimization of can body and then realize the light weighting of the metal can. Throughout the optimization process, the main methods used include finite element method analysis, nonlinear multi-variable function approximation and computer numerical optimization technology. As to the structural optimization process of end and bottom, first, confirm the basic design shapes of them, define some geometric parameters in the design shapes as design variables while the area of end and bottom as optimized objectives, then use three-level orthogonal test method to design test points and analyse these points with finite element analysis method. Second, use computer numerical optimization technology to optimize optimized objectives on the basic of the results of finite element analysis. After optimization, analyse the optimized models of end and bottom respectively to verify the reliability of optimized results, and meanwhile, compare thte quality attributes of the current end and bottom to the optimizated to obtain the optimized percentage of quality. In the optimization process of of can body’s thickness, use the finite element method analysis to simulate the analysis models with different thickness, observe the change trends of the mechanical properties of can body when thickness changes and then determine the best thickness of can body. After the optimization of every part of the metel can, the metal can is analied to verify the reliability of the results.Furtherfore, through the study of this paper, not only obtain the nonlinear multi-variable function of maximum deformation and maximum equivalent stress with respect to the design variables of end and bottom, but also the impacts that each design variable makes on the functions. All of these will provide some reference for the structure designing of metal can in the future.