SECTION TITLE
FASTENERS & SEALING
The springs have a reversible change in shape under load
SPRING DEVELOPMENT T e goal when developing a new technical spring is to fi nd a spring for the given application that fi ts perfectly, taking all circumstances into account. Function, shape and dimensions must be selected in such a way that the technical spring optimally fulfi ls the required spring work. Various factors play an important role in spring development – for example, which task the technical spring must fulfi l, which spring movement is desired, how large the available installation space is and which connection components are available. In
Technical springs include form springs, fl at springs and contact springs
addition, there are properties and special features from the overall construction and from the operating conditions. Other considerations include corrosion resistance, electrical conductivity or to determine the most economical production possible or the basis of the spring construction. In general, the following requirements for spring development must be brought together for technical springs.
TASK AND FUNCTION What is the technical spring used for (medical technology, food technology, electrical engineering, etc.) and which functions – such as the state of force, development of force (spring characteristic) and any additional functions (electrically conductive, non-magnetic, insulating, acid- resistant, etc.) – are required?
With regard to installation situation and installation space, engineers must ask how is the force introduced (compressive, tensile, torsional or bending stress) and what installation space is available for this? Determining feather type and feather shape is another requirement. Which spring type is suitable for the task and with which spring shape can this be implemented in the existing installation space? Required forces and spring defl ections should also be considered. Which spring forces are required for certain spring defl ections or lengths? Operating temperature and
environment are other key considerations. At which operating temperature and in which environment (air, salt water, engine oil, etc.) is the technical spring used? Finally, the type of load and service life should be determined. What is the type of load (static constant load or dynamic load with changing loads and lifting stresses)? For what total service life should the technical spring be manufactured?
Jürgen Mugrauer is communications manager of Gutekunst Federn.
www.federnshop.com/en/
44
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