In 1986, Boeing began using this technology to install ring groove rivets 152 in the manufacture of the Boeing 767. In 1992, Electroimpact developed a ring grooved rivet in the United States to replace the previous manual installation by British Aerospace. Low-voltage electromagnetic (stress wave) installation equipment, the interference amount of the 2024-T351 aluminum alloy is 1.6% 2.0% 162, and through the fatigue test, the stress wave installation method can be used to install the ring groove rivet to obtain a fairly good installation quality. The conclusion. When the stress wave installation process is installed with interference fit fasteners, the ideal stress wave is an elastic wave whose stress intensity is close to the dynamic yield strength RD of the fastener material, and has a wide pulse length, that is, sufficient work time. When the stress wave strength is sufficient, sufficient elastic deformation and high speed of movement can well achieve the installation of the fastener. When the stress wave strength is insufficient, the elastic deformation and the speed are insufficient to overcome the resistance, the fastener is strongly rubbed against the hole and is damaged, and it is difficult to install. When the stress wave strength is too high, the fastener and the connected member may be plastically deformed or even destroyed. However, for stress wave installation equipment, the inductance L of the equipment is mainly determined by the inductance of the coil, and the capacitance of the equipment is often fixed. Therefore, in the actual installation process, the installation force can often be changed by adjusting the charging voltage, thereby meeting the installation requirements of different fasteners. Tests have shown that the stress wave installation method for fasteners with an interference of less than 2% can be directly installed at one time without freezing, and the installation method of the ring groove rivet can achieve a fairly good installation quality. 3 stress wave installation process When installing the interference fit fastener, the ideal stress wave is the installation of the elastic wave strike completion fastener with the stress strength close to the dynamic yield strength RD of the fastener material, avoiding the hammering of the ordinary rivet gun multiple times. And easy to produce fastener eccentricity and other issues. The stress wave can be installed with a portable rivet gun, which has no restrictions on the openness of the structure.
Various designs-round shape, square shape.
Different sizes: round-38mm, 48mm, 58mm
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