Special springs

The development and production of special springs requires a high degree of technical expertise in order to equip the end products with all the properties that are required for later use.

On machines, devices and equipment or generally on production lines, there are always applications where certain components are required which resilient effects must have. These are often applications in which components are held with a very specific force, but not in such a way that they are completely fixed in a specific position; instead, it should still be possible to release these components by overcoming the holding force.

In such applications, these types of Challenges successfully solved with customised springs become.

• Elongation
When a component is subjected to tension, its original length increases. The elongation of a component is defined as the ratio of change in length to original length.

• Yield strength
The yield point (also known as the elastic limit) for steels is generally the mechanical stress limit up to which a component can be loaded in order to return to its original shape after unloading without permanent deformation.

• Tensile strength
Deformations of components under increasing loads are usually recorded in stress-strain diagrams.

• Yield strength ratio
The yield strength ratio of a material is the ratio of its yield strength/tensile strength.

• One of the most important properties of springs of any kind is their spring characteristic. This characteristic curve is defined as the ratio ^Power/_Path. The spring characteristic curve thus has the dimension ^N/_mm. A distinction is essentially made between the following characteristic curves for springs:
  
  
  • Linear characteristic curve
  For springs with a linear characteristic curve, the ratio ^Power/_Path a constant value.
  
  
  • Progressive characteristic curve
  For a spring with a progressive characteristic curve, the curve in the force-displacement diagram runs with a convex increase. As the travel increases, the corresponding force is disproportionate. The ratio ^Power/_Path increases as the path rises.
  
  
  • Degressive characteristic curve
  A spring with a degressive characteristic curve has a concave rise in the curve in the force-displacement diagram. An increasing value for the travel results in a corresponding disproportionately low force. As the displacement increases, the ratio ^Power/_Path smaller.
  
  
  • Linear characteristic curve with kink
  Sometimes it is technically desirable for a spring to initially have a linear characteristic curve up to a certain load. From a certain value for the travel, however, this characteristic curve should continue to be linear, but with a greater increase in force. Such kinked characteristic curves can be achieved, for example, with supports that only become effective after certain initial travels have been exceeded.

The design of the cross-sections of special springs has a significant influence on their spring properties, in particular on the resulting spring characteristics.

This applies in particular to the design and dimensioning of Stamped-bent parts made from spring steel and leaf springs, flat springs, moulded springs, contact springs and spring clips. Specially manufactured springs of these types generally have to be adapted to the specific conditions on site during subsequent operation. The sensitivity of the production parts that come into contact with these special springs also plays an important role here.

This is particularly the case with production lines in the medical sector, for example.

The following table provides an overview of the most important types of spring steel and their standardisation and properties:

In addition to a Effective surface protection should our numerous variations of leaf springs, flat springs, moulded springs, contact springs and spring clips also visually a Flawless and appealing appearance received.

We can offer you an almost unlimited selection of surface coatings, either according to customer requirements or as needed, which go far beyond simply galvanising, painting, burnishing, phosphating and barrel finishing your parts.

After constructive optimisation of your desired components, the Production of special springs at Mario Schaaf GmbH & CO. KG on ultra-modern CNC bending machines realised according to qualitative and economic criteria. Our flexibility enables us to produce both large series and smaller quantities.

We use the extensive expertise of our experienced employees to manufacture smaller series of special parts for which the economical use of series tools is not possible. The moulds and dies required for this can then be produced using CAD/CAM processes and given an optimum finish by a toolmaker. This enables us to guarantee a long service life and extreme repeat accuracy.

In addition to virtual support from modern CAD systems, the optimisation and design of all types of special springs also requires numerical assistance from suitable and powerful finite element programs.

We, Mario Schaaf GmbH & CO. KG, have dedicated ourselves as a speciality spring manufacturer to the development and production of special springs of all kinds. Quality, customer service and customer satisfaction are our top priorities.

Get in touch with us at any time and leave it to us the solution to all your clamping and fixing problems. Like many other customers before you, you will be delighted with our services.

The Development and production of special springs requires a high level of technical expertiseto equip the end products with all the properties that will be needed in later use.