We are one of the renowned manufacturers and exporters of superior quality Compression Springs that are used to store mechanical energy. These springs serve the opposite function of an extension spring. These are designed with high precision using the finest quality metal alloy and advanced machinery as per the set industry norms. Highly appreciated for its high strength, dimensional accuracy, durability and optimum performance, the offered product is available in different specifications at market leading prices. Also, we can customize these Compression Springs as per the specific needs of clients.
The achievable service life of helical compression springs depends to a large extent on the composition of the spring wire, the operating conditions, and on design parameters.
In all applications with oscillating spring displacement, careful selection of both preload values and compressive displacement are prerequisites for extended spring life, as confirmed by the permissible stress values in the loading data tables and the stress/spring life diagram.
Shear stress maxima and spring oscillation stress differentials are a direct function of the quality of the spring wire. FIBRO High Performance Compression Springs are made exclusively from special 50 Cr V4. The superlative characteristics of this material are further enhanced by heat treatment under optimal conditions, followed by a ball shot peening process.
For extended spring life under oscillating load changes, the maximal shear stress tzul. is 800 N/mm2, of which some 400 N/mm2 = (Th) may
be taken up by the stress differential between spring oscillations.
Higher stress levels are permissible only under the proviso of limited life expectancy, or in cases of static and quasi-static load conditions.
Springs subjected to dynamic load conditions also suffer impairment to their life expectancy through influences such as extreme operating temperatures, transversal stress components, shock loads, and resonant vibration frequencies. In all these instances, a lowering of the stress levels assists towards better spring life.
The spring material has a working temperature of up to 250°C. This rating is an approximation since the actual approved working temperature will also depend on factors such as load. It is worth noting that above 100oC the modulus of elasticity decreases and with a reduction in tension setting starts to Occur.
Extended Spring Life: Spring Displacement Values
The largest permissible displacement is indicated by 56 - offering about 62 % of the "total" displacement of the wire-to-wire compacted spring (= Sn). This displacement will induce a shear stress of tzul. of 800 N/mm2. The associated stress different' during oscillations should not exceed 400 N/mm2 (= Th).
Calculation of Spring Forces
Simple multiplication of the spring co efficient R with the applicable displacement 5 (mm) yields the spring force value (N).