Our unique processing method realizes extension springs with high initial tension.
Achieves compactness and weight reduction without changing the load.
Because the initial tension P2" is small, a large deflection σ” is required to obtain the required load P, needing a large equipment.
Because the initial tension P1’ is large, a small deflection σ‘ only is required to obtain the required load P, allowing compact design.
The increase in spring rate is suppressed to achieve stable operability.
Because the load difference between σ1 and σ2 (P2" - P1) is large, the change in characteristics is sudden, resulting in awkward operation. Also, the spring rate is large.
The load difference between σ1 and σ2 (P2‘ - P1) is small, making it easier to stabilize the characteristics and providing smooth operation. The spring rate is small.