Development of a geometric modeling tool for rectangular drawbeads in draw dies

This paper presents the development of a geometric modeling tool for rectangular drawbeads on curved binder surfaces in draw dies. The developed tool provides a fully automated and robust modeling procedure for the geometry of the drawbeads. Given a bead curve on the binder surface, the section profiles are computed at the points on the bead curve. The section profiles and the given bead curve make the three-dimensional drawbead as a sweep solid. The sweep solid is mounted and combined on the binder surfaces. Finally, the shoulder and exit edges of the drawbead are rounded. The value of the rounds is easily modified, because the rounding is the last procedure of the modeling process. The developed tool was tested and it was verified that it helps to reduce the modeling time and increase the quality of the drawbeads.