forming operation, when the tools release the produced part, springback occurs in order to release the accumulated elastic energy and to reach a new equilibrium status. The springback amount is proportional to the material characteristics and to the part size and it can lead to major problems during the assembly phase where different components have to mate each other according with the design specification [1] [2]. To predict the variation of springback and to improve the robustness of the forming process, variation simulation analysis could be adopted in the early design stage [1]. In this paper, finite element (FE) analysis has been used to enhance the understanding of sheet metal forming processes for an aeronautic component characterized by: large size, high drawing depth and curvature radius. The prerequisite for the virtual die layout with compensated springback effects is the accurate modeling of the elastic springback effects. Moreover, the springback behavior depends on the shape stiffness of the part as well as on the inner residual stresses. The cooperation, between University and the aeronautic OEM (Original Equipment Manufacturer), has lead, as final result, to the definition of an innovative methodology for springback compensation which can allow a drastic reduction of the compensation experimental try out. For the numerical set up the so-called advanced approach has been considered [3], which is the one-to-one representation of the real process. Interesting feedbacks have been obtained by the application of the proposed methodology.
Springback Compensation for Large Size Metal Formed Aeronautic Components
DEL PRETE, Antonio;PRIMO, TERESA;ANGLANI, Alfredo;
2009-01-01
Abstract
forming operation, when the tools release the produced part, springback occurs in order to release the accumulated elastic energy and to reach a new equilibrium status. The springback amount is proportional to the material characteristics and to the part size and it can lead to major problems during the assembly phase where different components have to mate each other according with the design specification [1] [2]. To predict the variation of springback and to improve the robustness of the forming process, variation simulation analysis could be adopted in the early design stage [1]. In this paper, finite element (FE) analysis has been used to enhance the understanding of sheet metal forming processes for an aeronautic component characterized by: large size, high drawing depth and curvature radius. The prerequisite for the virtual die layout with compensated springback effects is the accurate modeling of the elastic springback effects. Moreover, the springback behavior depends on the shape stiffness of the part as well as on the inner residual stresses. The cooperation, between University and the aeronautic OEM (Original Equipment Manufacturer), has lead, as final result, to the definition of an innovative methodology for springback compensation which can allow a drastic reduction of the compensation experimental try out. For the numerical set up the so-called advanced approach has been considered [3], which is the one-to-one representation of the real process. Interesting feedbacks have been obtained by the application of the proposed methodology.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
