T5処理されたアルミニウム鋳物と高張力鋼板の単一リベットを用いたセルフピアスリベッティング

A T5-treated aluminium die casting and a high strength steel sheet component were joined by self-pierce riveting using a rivet having a single length. The problems of large thickness variation and low ductility of the aluminium castings in riveting were solved by optimising the shape and hardness of the rivet and die. The edge cracking of the aluminium casting was prevented by applying pressure to the edge via the holders. The aluminium casting having large thickness variation and low ductility was successfully joined with not only a 590 MPa but also a 980 MPa ultra-high strength steel sheet.