What machine is used to form a bead along the edge of a material?

The machine used to form a bead along the edge of a material is a rotary machine. This type of machine operates by rotating a forming tool against the edge of the material, allowing for controlled deformation and the creation of a bead that can add strength and rigidity, or serve a specific functional purpose in the assembly of aircraft structures.

A slip roll former, while used for bending and rolling sheet metal into cylindrical shapes, is not specifically designed for creating beads. A shear machine primarily cuts metal and does not shape the edges. A notching machine is used for making notches in materials, which is a different process than bead forming. Thus, the rotary machine is specifically suited for the task of forming beads along edges when precision and uniformity are required in the fabrication process.