| 摘要 |
<p>There is provided a blind rivet (10) comprising an axially extending hollow tubular body (18) having a tail end face (22) at one end and a pre-formed radically enlarged flange (20) at the other end, together with a mandrel (30) having a stem (32) which extends co-axially though the body (18) and having enlarged head adjacent the tail end (22) of the body, the stem having a weakened region immediately adjacent the head, whereby the mandrel head having an outer diameter greater than an outer diameter of said body, usually by between 4% and 9%, and which has a uniform conical shoulder (38) extending between said outer diameter of the head and the stem (32), so as to exert a setting force having an axial component for compressing the rivet body axially and an angular component effecting conical deformation of the tail end radically. There is also provided a method of fastening at least two workpieces using such al blind rivet (10), including providing the blind side of the workpieces with a' countersunk region to accommodate the conically deformed tail end of the body after setting, substantially flush therewith.</p> |
