Investigation of Joint Quality 980 MPa Grade GA Steel Sheet and 5052 Aluminum Alloy by Electromagnetic Self-Piercing Riveting

Generally, an approximately 1% weight reduction in a 200 kg automobile improves the fuel economy by 20~26% and acceleration performance 8%. Hence, various techniques for automotive lightweighting have been developed to satisfy environmental regulations of industry. The joining dissimilar materials is critical assembling lightweight body structures, but fusion welding inapplicable owing difference mechanical properties between materials. Thus, development appropriate material-joining process required produce high-quality joints. Self-piercing riveting representative that applied pressure punching without prehole piercing. Operationally, this widely used because it can joints with high shear strengths. However, lighter higher-strength indicates force SPR machines form increasing. high-speed E-SPR has ultrahigh tensile steels. In study, SGAFC980/A5052-H34 was process, joint characteristics were analyzed via cross-sectional analysis strength tests. With increase fastening speed, interlock distance load increased.