| 摘要 |
A two-piece rivet assembly comprising a shank member and a collar. The shank member includes a head, a cylindrical shank, and a helical thread with a substantially constant pitch, but with a crest diameter which decreases as it extends away from a maximum adjacent to its end farthest from the shank. The ring-like collar has an inner wall, an outer wall, and a first and a second end. The inner wall defines a passage between the ends to receive at least a portion of the thread. With the shank placed in an aperture in a workpiece with at least a portion of the thread projecting beyond a surface of the workpiece, the collar is placed over the thread and a swaging setting force is applied. This force applies both axial and radial components to the collar. This forces the collar against a surface of the workpiece and swages the wall into the thread at its maximum diameter and then continuously along the thread, exerting a tensile force on the shank member.
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