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Industry News - Technical Article
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Proper Radii in Torsion Springs & Wire Forms
posted May 27, 2008
How important is it to use the proper bend radii when designing torsion springs and wire-forms? This is a topic that, when overlooked, can often result in excessive cost caused by breakage and therefore should be addressed prior to final design.
Breakage (fracture) will sometimes occur at the bends on torsion springs or wire forms when the radius is too tight (small). Higher concentrations of stress occur in these areas caused by the loads being applied to the sharp bends in the material.
Stress concentrations factors can be estimated. It is best, however, to design the radius to be 1.5 times the diameter of the material.
To help our customers in the design of spring and metal form parts, Newcomb Spring Corp offers a special technical guide CD that includes an animated glossary as well as animated characteristics of springs. This may be obtained by visiting our Quick Contact page - please write that you are requesting a CD in the Notes field.
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