English Views: 66 Author: Site Editor Publish Time: 2026-01-05 Origin: Site
Standard Analysis: High Stress Design Logic and Engineering Considerations of DIN6796 Elastic Gasket
In the standard system of elastic components, DIN 6796 elastic washers (a specific type of disc spring) are notable for their unique design stress levels. Their design values differ significantly from those of general disc springs (e.g., GB/T 1972 series). Jiangsu Sunzo Spring will analyze the technical principles and engineering logic behind DIN6796 washers' higher design stress through comparative studies.
A key distinction between DIN6796 washers and standard disc springs (Class A/B/C) lies in their lower cross-sectional coefficient (h₀/t, the ratio of free height to thickness). This geometric characteristic directly influences their mechanical behavior:
Higher stiffness: A smaller h₀/t value indicates that the gasket's material strain gradient increases during deformation, resulting in greater rigidity.
Higher calculated stress: Under identical flattening displacement or load conditions, this geometric configuration significantly increases the calculated stress at critical points (e.g., the OM point). Standard calculations show that DIN6796 washers can achieve a σOM stress design value of approximately 1800 MPa in the flattened state, surpassing the design thresholds of many universal disc springs (typically 1400-1600 MPa).
Why is such a high design stress allowed for the gasket? This is primarily based on its typical static load application scenario:
1. Function: DIN6796 washers are primarily used as anti-loosening washers, constant-force clamping elements, or clearance compensation components. After assembly, they are compressed to a fixed position and endure near-static loads for extended periods with minimal cycle frequency.
2. The fatigue consideration is less critical: compared with the dynamic load disc spring which needs to bear high frequency reciprocating load, the static load washer has less requirement on fatigue life. Therefore, the design can make full use of the static strength of the material, and allow the working stress to be close to the yield limit of the material, so that the larger clamping force can be provided in the same space, and the more compact design can be realized.
3. The safety margin is mainly reflected in the guarantee of the extreme static load capacity, not the high cycle fatigue safety factor under the dynamic load.
This comparison provides engineers with critical insights for equipment selection.
Specify load characteristics: For static loads or infrequent adjustments requiring extreme preload or tight space constraints, consider high-stress gaskets designed according to DIN6796 principles.
The general disc spring series (A/B/C) based on fatigue strength design must be selected for dynamic cyclic load, and the working stress must be strictly controlled within the allowable fatigue range.
Customization is possible: For special working conditions, the design philosophy of different standards can be referenced for customization. For example, in dynamic applications requiring high stiffness, large load but small stroke, the high-stress concept can be referenced in disc spring design, but it must be supplemented with strict fatigue verification.
Jiangsu Sunzo Spring not only manufactures standard disc springs and wave springs, but also has profound expertise in the design principles of various elastic component standards (e.g., DIN6796). We can provide you with:
Precision Selection Guidance: Helps you choose the most suitable solution among standard disc springs, high-stress washers, wave springs, or helical springs based on load characteristics (static/dynamic), space, and force requirements.
The design concept of hybrid: In the design of non-standard disc spring, we can combine the advantages of different standards, such as designing a high-stress compact disc spring for the static locking mechanism, or designing a disc spring with optimized fatigue life for the dynamic buffer device.
Full product range: Whether you need DIN6796-compliant washers, GB/T 1972 disc springs, or corrugated/spiral springs, we provide end-to-end solutions from technical consultation to product delivery.
We help customers understand and apply the design logic behind different elastic element standards, enabling them to make the most informed engineering decisions between cost, performance, and reliability, and deliver the most suitable elastic solutions for your equipment.
