This paper represents the quantitative effect of important parameters that control metal flow into the die cavity on the formability in the stamping process of the inner panel of the front side member. The formability of the stamping process is studied by inspecting the occurrence of tearing, wrinkling and the excessive springback amount with changing parameters such as the blank holding force, the initial shape of the blank and the draw-bead. Summaries of the present study are as follows: 1) The stamping analysis with the initial blank of the closed type is performed with changing the value of the blank holding force. It is insufficient to achieve the uniform metal flow with changing the blank holding force. 2) Parameter studies are carried out by changing the initial size of the blank in order to overcome failure. The initial blank of the semi-open type is more appropriate than that of the open type from the view point of the high formability, but it still needs additional process parameters to improve the metal flow in the complicated geometry. 3) The draw-bead is employed in order to increase the restraining force to the blank and an analysis is carried out to investigate the effect of the draw-bead on the quality of the stamped part. The restraining force of the draw-bead controls the metal flow in the local area and reduces the amount of excess metal. 4) It is noted that the parametric study of design parameters such as the blank holding force, the blank size and the draw-bead is very important to control the metal flow and to improve the metal flow in the process design of the complicated member.
A simulation-based design parameter study in the stamping process of an automotive member
Journal of Materials Processing Technology ; 189 , 1-3 ; 450-458
2007
9 Seiten, 18 Bilder, 9 Quellen
Article (Journal)
English
99043 Simulation and experiment analysis of stamping forming process of automotive side frame
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