The effects of ultrasonic vibration on riveting quality

Abstract Ultrasonic vibration can reduce the forming force, decrease the friction in the metal forming process and improve the surface quality of the workpiece effectively. The effects of ultrasonic vibration on riveting quality were systematically studied by numerical simulation and experimental methods. The riveting force, interference, riveting head and microstructure of rivet under different vibration conditions were analyzed, in order to study the influence of the ultrasonic vibration on the riveting process. The study results show that the ultrasonic vibration can reduce the riveting force and decrease the friction. Thus, the flow of rivet material was promoted and the interference and interferometric uniformity were enlarged. Riveting quality was improved, and the improvement effect increased with the increase of amplitude. Compared with the conventional riveting, the relative interference was increased by 27.32% and the shear strength was increased by 17.16%, when the amplitude is 5.77 μm.