Spring technologies

Uncompromising quality for excellent spring technologies

Spring technologies

MEDER will do anything to produce high-quality springs: winding, coiling, bending, cold setting, spring end grinding, heat treatment, shot peening, glass shot peening and deburring. We use a range of different technologies to develop and optimize your springs. From the smallest springs found in heart pacemakers to the ground pump springs used in coffee machines with high switching cycles, we supply you with the right technology.

Winding

  • Use of CNC-controlled coiling machines
  • Rotating windings pins for optimized application of the spring ends
  • Highly flexible
  • Reduced setup times
  • Highest precision
  • 100% inspection and adjustment of the unloaded spring length and diameter
  • 100% force testing

Coiling

  • Spring body coiled around a mandrel
  • CNC coiling machines
  • Highest precision
  • Laser and camera checks

Bending

  • CNC and stamping/bending machines
  • Highly flexible
  • Reduced setup times
  • Highest precision
  • Laser and camera checks 
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Cold setting and 100% inspection

  • Use of automatic cold setting equipment
  • 100% inspection of spring forces
  • Different machine designs for different quality requirements (tolerances)
  • Multiple sorting of compression springs into separate classes
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  • Grinding of the ends of compression springs with a wire diameter of 0.3 to 1.5 mm
  • Fully automatic loading and unloading
  • Adapted grinding technologies (machine and grinding disc qualities) for the grinding of patented drawn, oil-tempered and stainless steel wires and special alloys
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Most wire springs are manufactured from high strength round wires and profiles. The winding or coiling of the spring introduces high internal bending stresses that have a negative impact on the spring properties in terms of life cycles and usable spring forces. Most of these influences can be removed with a heat treatment process adapted to the material, at the same producing an increase in the initial strength and in the elastic yield strength in the material.

We set the properties of the springs to their optimum values with defined heat treatments. We have a wide range of heat treatment systems in place, including convection, inert gas and vacuum furnaces.

  • We treat sensitive springs gently in a continuous furnace

  • Circulating air tempering

    • Relaxation of inserted bending stresses
    • Increase of the tensile strength of the primary material

  • Inert gas and vacuum annealing

    • Relaxation of inserted bending stresses
    • Increase of the tensile strength of the primary material
    • No discoloration of the surface
    • Surface without oxide layer

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Shot peening is a manufacturing process used to increase service life by introducing internal compressive stresses into the surface zones. The process compacts the surface.

The process of steel and glass shot peening can be used to deburr spring ends.

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Electrical/chemical deburring processes

To improve surface topography and for deburring and rounding, we use both electrochemical and chemical deburring processes, enabling the deburring of areas that are hard to reach. During processing, the material is dissolved. This process is particularly suitable for challenging requirements in terms of the cleanliness of the parts.

Vibratory finishing

Vibratory finishing is method of surface treatment used to

  • Deburr spring elements
  • Rounding edges
  • Smooth and polished surfaces

 

Steel and glass shot peening

The process of steel and glass shot peening can be used to deburr spring ends.

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