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Disc Spring Characteristics
Calculated Characteristic vs Actual Test Results
The example illustrated above is typical of most disc springs, and underlines the necessity of limiting maximum deflection to 75% to avoid sharply increasing force and stress characteristics.
As the compressed disc spring nears its ¡®flattened¡® condition, the reducing cone angle results in the movement of bearing point toward the centre, thus effectively shortening the ¡®lever¡® length and ¡®stiffening¡® the spring.
Examples of varying Cone Height / Thickness Ratios
The ability to change the force/deflection characteristic, by way of varying the cone height to thickness ratio, is a particularly useful feature of the disc spring.
Shown above are some examples of different cone height to thickness ratios, and up to a ratio of 1.5 the disc springs may safely be taken to ¡®flat¡® or stacked in columns.
Above ratio 1.5 the disc spring will adopt a regressive characteristic, and is capable of ¡®push-thro.¡® if not fully supported. Disc springs with cone height/thickness ratios above 2.0 may invert when compressed toward the ¡®flat¡® condition.
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