Abstract: The electromagnetic riveting technology based on the principle of electromagnetic loading is a riveting process that can accurately adjust the pulse amplitude and pulse width, with good consistency and repeatability. To expand the application of electromagnetic loading methods in the unidirectional connection of closed/semi-closed structures and to achieve high-quality, high-consistency drawing of hollow rivets made from difficult-to-form materials, a handheld titanium threaded hollow rivet installation device based on electromagnetic loading has been developed. This device can insert and extract rivets through a rotating mechanism and is equipped with both flat-head and bent-head drawing methods, enabling the unidirectional installation of hollow rivets under normal and confined conditions. Experiments on the installation process are conducted using this device at different riveting voltages, and the forming conditions of the titanium threaded hollow rivets are observed. The voltage range for achieving high-quality riveting with both flat-head and bent-head drawing methods is obtained. Ultimately, through ABAQUS finite element analysis combined with the riveting force waveform applied by the riveting gun, the stress field distribution inside the rivet, and the potential failure risk areas, the relationship between riveting voltage and riveting quality is established, and the forming process and fracture reasons of the hollow rivets are analyzed. The experimental results indicate that the handheld electromagnetic drawing device has good consistency and can achieve high-quality unidirectional forming of hollow rivets under both conditions.

Key words: threaded hollow rivets, mechanical joining process, electromagnetic riveting, electromagnetic riveting gun, finite element analysis