Pre stress calibration process for Danly spring D9-3212-110

Pre stress calibration process for Danly spring D9-3212-110

Behind it is not only the accumulation of a hundred years of manufacturing experience, but also the deep integration of cutting-edge technologies such as materials science, heat treatment processes, and intelligent manufacturing.

In the era of Industry 4.0, this spring will continue to serve as a key link between mechanical design and production practice, driving the evolution of manufacturing towards higher efficiency and lower energy consumption.

Material and process: reliability guarantee under working conditions

Vacuum heat treatment of alloy steel

D9-4412-210 uses chromium silicon alloy steel as the substrate and undergoes three tempering treatments through a vacuum exhaust furnace.

A vacuum environment can prevent steel from oxidizing at high temperatures, while precisely controlling the distribution of carbides, resulting in a surface hardness of HRC 48-52 for the spring and a core hardness of HRC 42-45.

This gradient hardness structure not only ensures the fatigue resistance of the spring, but also enhances its wear resistance.

In the mold of the mining machinery crusher, this spring can withstand the impact wear of ore debris for a long time, and the maintenance cycle is extended to 6 months.

Dany product model

9-1608-210

5-8024-83

5-8032-83

6-8020-82

6-8011-85

5-8028-83

6-8019-82

W01、W02、W03

SinterLube coating technology

For applications in high humidity environments, Danly has developed SinterLube sintered bronze coating for D9-4412-210.

This coating uses powder metallurgy technology to sinter copper particles onto the surface of the spring, forming a porous structure that can store lubricating oil and release it to the contact surface.

In the hydraulic system of offshore platforms, the friction coefficient of coated springs is reduced by 40% compared to ordinary springs, effectively preventing elastic attenuation caused by salt spray corrosion.

Pre stress calibration process

During the production process, D9-4412-210 needs to undergo pre stressing treatment to compress to the solid height.

This process applies pressure exceeding 150% of the rated load through a hydraulic press to rearrange the molecular structure of the spring and eliminate internal stress concentration points.

The spring calibrated by prestressing has an elastic fluctuation range controlled within ± 5% in a temperature range of -40 ℃ to+120 ℃, meeting the temperature adaptability requirements in the aerospace industry.

From automotive stamping lines to wind power assembly workshops, from deep-sea platforms to electronic cleanrooms, Danly D9-4412-210 springs have redefined the standards for industrial elastic components with technical precision and adaptability to working conditions.

Pre stress calibration process for Danly spring D9-3212-110