Authors: Mehmet Ali Pişkin, Bilgin Kaftanoğlu
Abstract: Deep-drawing operations are performed widely in industrial applications. It is very
important for efficiency to achieve parts with no defects. In this work, a finite element method is
developed to simulate deep-drawing operation including wrinkling. A four nodded five degree of
freedom shell element is formulated. Isotropic elasto-plastic material model with Von Mises yield
criterion is used. By using this shell element, the developed code can predict the bending behavior
of workpiece besides membrane behavior. Simulations are carried out with four different element
sizes. The thickness strain and nodal displacement values obtained are compared with results of a
commercial finite element program and results of previously conducted experiments.
341
Authors: Ju Hua Huang, Li Xian Li, Ying Ying Wan, Jun Tuan Guo
Abstract: This paper takes the rear axle cap which is a typical automobile covering part as the research object. 3D and finite element model of it are built, and the drawing process is simulated with Dynaform, then the technological parameters are analyzed and optimized based on the simulation results, finally the part is compared with the one that is processed in practice. The results show that this method is easy and feasible, it not only increase the work efficiency greatly but also improve the quality of products.
1171
Authors: Wei Xia, Huan Yang, Jian Min Zeng
Abstract: The reasonable blank shape is very important for drawing forming quality of sheet. In this paper, the blank shape is obtained by inverse calculation based on final drawing workpiece, with finite element software. The optimal blank contour is determined by modifying the 3D models of final drawing workpiece and comparing with forming quality of the different inverse calculated blank shapes, according to the stress and the material flow law in drawing process. The results show that, in the case of the given shapes of workpiece, the blank shapes with high precision can be obtained, the formability becomes better, and the number of drawing forming can be reduced by using the method. The method may also contribute to the drawing of large and medium-sized panels, rectangular boxes and special-shaped parts.
1826
Authors: Chang Feng Men, Qiang Yu
Abstract: The die manufacturing is very important for the automobile industry. For the die manufacturing process is very complicated the trial-and-error method is still used. In this paper the full flow of precise die face design process for automobile die is studied in detailed. First the primary drawing die face layout is explained. And the initial information for blank formability simulation and primary die surface design is summarized. For the precise die face design process the blank thinning rate and die deformation are studied according to the two simulation results combined. The industrial application shows that the full flow of precise die face design process for automobile die is a good way for decrease the die manufacturing cycle.
1427
Authors: Yong Ming Wang, Li Hui Lang, Ya Su Xie
Abstract: Sheet hydroforming process of one irregular box with unequal height and flat bottom was investigated by numerical simulation and experiment. The effect of blank shape and pressure loading path on the forming result was discussed. The key process parameter was optimized. The results have shown that the round blank is the best shape blank. The part can be formed with the appropriate blank shape and die cavity pressure.
1846
