Machined springs promise predictable torque
An
Abssac product story
Edited by the Engineeringtalk editorial team
Jan 19, 2006
Torsion springs machined entirely from a single piece of material with coil elements predetermined using finite element analysis ensure the predicted spring rate is delivered every time.
Torque by definition is a force that produces rotation.
Torsion springs exert a force (torque) in a circular arc, but the delivery and repeatability of torsional rate has always posed a problem to wire wound springs.
Traditional wound torsional springs also have the potential failure area where the method of attachment is incorporated into the design, often consisting of a right angle bend in the wire to produce an attachment tang.
Abssac's machined torsion springs, as the name suggests, are machined entirely from a single piece of material, where the spring coil elements are predetermined using finite element analysis to ensure the predicted spring rate is delivered every time.
The method of attachment of the spring is also incorporated into the single piece design where such tangs can be structurally thickened to increase reliability of the part.
By having the option to then alter the machined spring coil elements within the same physical dimensions of the part also allows Abssac to supply different spring rates from the same spring design while guaranteeing dimensional accuracy.
Torsion springs, whose ends are rotated in angular deflection, offer resistance to externally applied torque.
The spring coil elements are subjected to bending stresses rather than torsional stresses, as might be expected from the name.
With the machine torsion springs the rate is linear in its feedback.
Something a wound spring can not achieve over its entire torsional rate spectrum.
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