Drawing bead structure based on variable fillet radius, metal plate and manufacturing die

The invention discloses a draw bead structure based on a variable fillet radius, a metal plate and a manufacturing die, and belongs to the technical field of die stamping. By designing the radiuses of the concave fillet and the convex fillet at the front and the back of the draw bead, the internal deformation resistance of a plate material after flowing through the draw bead is effectively reduced, so that the internal deformation resistance released by the plate material after the die is opened is reduced, the part rebound and warping defects caused by the internal deformation resistance are reduced, and the forming precision of the part is improved. 本发明公开了一种基于变圆角半径的拉延筋结构、金属板料和制造模具，属于模具冲压技术领域。本发明通过设计拉延筋前后凹圆角与凸圆角半径，有效减小了板料在流经拉延筋后的内在变形抗力，使得模具开模后板料所释放的内在变形抗力减少，从而减少了因内在变形抗力而引起的零件回弹和翘曲缺陷，提高了零件的成形精度。