＂Constant force spring＂ is a necessary component for cable accessory manufacturers at home and abroad

источник:Цянь Точность время:2022-9-14

With the increasing application of cold shrinkable cable accessories, constant force spring has become a necessary component for cable accessories manufacturers at home and abroad. How to find a suitable constant force spring in practical application? How to determine the continuous elasticity, magnetism and corrosion resistance of constant force spring has become the first consideration for cable accessory manufacturers and customers.

Whether imported brand or domestic brand, the use of constant force spring for standard cable accessories has become a standard configuration, but the quality is uneven. Faults often occur due to factors such as material, type selection or performance.

The corrosion resistance of constant force spring is related to the material and processing technology. The corrosion resistance of stainless steel mainly comes from chromium. The corrosion resistance of steel will be greatly improved only when the chromium content exceeds 12%, and the addition of nickel will also improve the corrosion resistance. Constant force spring for cable is generally made of stainless steel 301 in China and x12crni17 in foreign countries 7 stainless steel is made of high tensile strength and hardness during cold processing, non-magnetic, but magnetic after cold processing. After heat treatment, the magnetism can be eliminated, and the surface will turn light yellow, but the corresponding hardness will decrease.

The application environment of constant force spring is the same as that of cable accessories. The outside is generally wrapped with some strips to prevent axial displacement along the cable. In the process of use, it is wrapped inside the whole joint or terminal and will not be in direct contact with moisture, but it is easy to contact moisture when the protective layer is damaged. In addition, the heating during cable operation and the escape of gas from various internal insulation and sheath materials form a very harsh small environment, Therefore, the corrosion resistance of constant force spring in cable accessories is very high.

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