RAMPED STIFFENER AND APPARATUS AND METHOD FOR FORMING THE SAME

摘要

A die tool (30) for forming a C-section component having radiused shoulders, the die tool comprising: an inner die (32) having a cylindrical body (36) having a cylindrical outer surface connected to opposing planar end faces by respective radiused convex portions; and an outer die (34) having a cylindrical central portion (44) connected to opposing end flanges (46) by respective radiused concave portions (48, 50), wherein: a portion of the inner die is arranged to be disposed between the end flanges (46) of the outer die and spaced apart there from to define a cavity corresponding to the desired cross-section of the C-section component to be formed; the radiused convex and concave portions having a radius of curvature that varies about the circumference of the respective inner and outer dies; and the inner and outer dies are rotatable such that the radius of curvature of the radiused convex and concave portions where the inner and outer dies are adjacent to one another varies as the inner and outer dies are rotated.