The anti-loosening performance of the nuts was tested using vibration experiments. For ease of comparison, we also conducted tests on the anti-loosening performance of standard nuts, nuts with washers, standard double nuts, three-point pressure nuts, and nylon nuts. All experiments were conducted according to the national standard GB\/T 10431-1989, “Methods for Testing the Lateral Vibration of Fasteners.” The experimental conditions were also identical: the test nuts had a size of M16×2.0; the performance level was 10; the vibration frequency was 12.5 Hz; the vibration amplitude was 1.6 mm, and the vibrating force was 8.2KN-flange surface nut.
Standard nuts, nuts + washers, standard double nuts, and three-point pressure nuts. After the start of vibration, the axial force decayed to 0 within 200 seconds. The disappearance of the axial force indicates that the nuts have become loose and are no longer effective. Nylon nuts experienced rapid axial force decay after the start of vibration, with the force essentially remaining constant at 20kN until the end. The overall axial force decay was 70.5%. This suggests that nylon nuts have slightly better performance compared to the previous four types of nuts. In contrast, anti-loosening nuts showed only minor axial force decay after the onset of vibration, with the force remaining above 60kN throughout the entire vibration cycle. The overall axial force decrease was less than 10%. The anti-loosening effect remained largely unchanged from its initial state. It is evident that the anti-loosening performance of nuts is superior to that of other types of nuts – flange-type nuts.
The application of anti-loosening nuts for flange-faced nuts
In recent years, the medical community has adopted the use of steel plates for the treatment of fractures. The most significant challenge with this approach is the reliability and durability of the steel plate fixation method. In other words, after the bone plate has been installed and healed, it must withstand millions of cycles of stress and strain. Thread technology has been successfully applied to the locking of screws on the bone plate using flange-faced nuts.
Thread technology has gradually been adopted in a wide range of fields, including aircraft, automobiles, trains, railways, ships, construction, machinery, oil and gas, agricultural machinery, power generation, military equipment, and medical instruments. This is a successful example of the successful application of aerospace technology to civilian industries, marking a revolution in traditional thread technology – flange-faced nuts.
As the use of anti-loosening nuts among Chinese users grows and their application scope expands, new examples of their usage continue to emerge.
