Method of joining sheets by using new type rivets

A new method of joining metal sheets using a short pipe rivet is proposed. A pipe rivet is set between two sheets and compressive force is applied, then both ends of the pipe are impressed into the sheets, respectively, and joining is made. Here, the inner corners of both ends of the pipe rivet are cut off conically so that the diameter of ends may be enlarged during impression and a tight joining is obtained. Consequently, it was found that joining strength against in-plane and out-of-plane forces is quite high. Furthermore, a modified method by using a wavy ribbon rivet is proposed and it was found that this method can be applied to the joining of a long joining line successfully.