A method for testing the mechanical properties of inclined coil springs

Abstract

The invention discloses a mechanical performance testing method of oblique-coil springs. The method comprises the following steps: firstly, establishing geometric parameter equations of a linear oblique-coil spring and an annular oblique-coil spring; secondly, drawing geometric models of the various oblique-coil springs according to the geometric parameter equations, introducing the geometric models into finite element software ANSYS to perform numerical simulation so as to obtain load-displacement curves before the oblique-coil springs work to reach a coil combination state when geometric parameters of the oblique-coil springs are regulated, changing the parameters so as to obtain the influences of the geometric parameters to the load-displacement curves, and carrying out experimental measurement on a sample so as to obtain load-displacement curves of the linear oblique-coil spring and the annular oblique-coil spring in practical work; and finally, comparing a finite element calculation result with an experimental measurement result to verify the reasonability of finite element calculation so as to verify the feasibility of the geometric parameter equations. According to the method, a production design optimization scheme of the oblique-coil springs is provided according to the experiment and the finite element calculation result, and the method has an innovative significance and wide application prospect.

Description

technical field [0001] The invention relates to the technical field of research on the mechanical properties of canted coil springs, in particular to a method for testing the mechanical properties of canted coil springs. Background technique [0002] The stability and reliability of the structural performance of the connectors in mechanical equipment has always been a focus of engineering circles. Due to the small size and large number of coils, inclined coil springs have high flow capacity and good technical economy. This makes the canted coil spring particularly suitable for the design of the connecting piece. [0003] Compared with ordinary positive coil springs, inclined coil springs have simplified structure, convenient installation, many contact points, good electrical conductivity, high current capacity, high electric and thermal stability, uniform electric field distribution, and large contact deformation range in practical applications. The contact pressure is basi...

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Problems solved by technology

[0004] The production of inclined coil spring is the patented technology of Basel Corporation in the United States. There is no mature production process in China. However, due to the monopoly of foreign technology, the production and development of this product in my country are limited. Domestic imitations are due to technology or process. The problem leads to a large gap in performance compared with imported products, and the service life is only 1 / 10 of similar foreign products. Since this product is one of the key parts of high-voltage circuit breakers, the market demand is large, but most of them rely on imports.

Some technicians in China have researched the design of the canted coil spring, but most of the research is related to the electrical performance, and the research on the mechanical performance is rarely involved.

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