Spiral springs

Spiral springs are used as balancing springs for smaller angles of rotation.
The stored force serves as compensation or retraction torque and the spring curve rises almost in a straight line.





Finite element method (FEM)

To go beyond analytical calculations and also take influences such as friction or dynamic loads into account during the early product development stage, the application of the finite element method (FEM) is recommended. The spring geometry is optimized and tested with regard to its running behavior in the application before the first part manufactured in series production becomes available for assessment. The method is used to calculate static and dynamic load scenarios, which have a significant influence on bending stresses on the spring and are difficult to investigate experimentally.

These formulas enable an initial theoretical calculation of the spring.
However, the final spring design and its functionality must always be tested and confirmed using samples.

The KERN-LIEBERS group of companies calculates the optimum spring dimension on the basis of the data provided by the prospective customer with a spring calculation program developed specifically for this purpose. Our aim is to offer the optimum spring type and spring dimensions in terms of both functionality and cost.