Research on the reliability of inclined coil spring in electrical connection

Helical coil spring as the key components widely used in aerospace, aviation, transportation, health care, cars and other modern category, in recent years because of the huge domestic market demand and key technology patents abroad blockade, the domestic emerged a lot of imitation of foreign high-performance helical coil spring, but the weak theoretical foundation and limited experimental research result in independent research and development of helical coil spring products in mechanical properties Energy, fatigue characteristics, life stability and other aspects of foreign products have a large distance. In this paper, considering the influence of random load, strength degradation and random structural parameters, the research on the reliability of inclined coil spring is carried out: In this paper, the main failure modes and reliability problems of inclined coil spring in sealing and electrical connection are summarized. It is pointed out that the reliability problem is closely related to the working stress, and the working stress is analyzed based on its mechanical analysis. Secondly, three methods are used to calculate and analyze the main reliability problems of the inclined coil spring in the use of electrical connection, that is, according to the stress. Static reliability calculation of strength dry and model: Research on dynamic robustness based on strength degradation with time; Based on the research and sensitivity analysis of ANSYS/PDS finite element method and Monte-Carlo method, and compared the conclusion on the reliability, the reliability of slanting coil spring in electrical connection was summarized and analyzed, which provided certain guidance for the research and development of slanting coil spring in practical engineering, as well as the protection and update of product equipment. Finally, in order to further carry out the research of the reliability test, the structure of the inclined coil spring accelerated life test bed is preliminically designed in this paper, and the specific operation process and test methods are specified in detail, which provides a good background for the development of the next step of the reliability test research.