Setting and testing systems for suspension springs

Quality in vehicle construction

Torsion springs used as stabilizers and suspension springs are among the most safety-critical components used in state-of-the-art chassis technology. By compensating for irregularities in the road, they ensure that the wheels always remain in firm contact with the ground and that the vehicle can be steered safely. At the same time, they ensure a high level of ride comfort, as they protect the occupants from up-and-down, pitch and roll movements, as well as impacts.

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Sebastian Spies

Sebastian Spies


How does the cold and hot setting of springs work?

The majority of suspension springs are manufactured in a cold forming process by coiling. This achieves good flexibility while simultaneously allowing for the easy variation of the number of coils and their diameter. During coiling, negative internal stresses are generated in the spring steel, which are released by means of heat treatment. This simultaneously hardens the spring.

Heat setting makes it possible to create a predefined residual stress in the spring wire, which prevents the excessive relaxation of the spring at higher temperatures and tensions. For this purpose, the springs are heated in the free state and quenched with cooling liquid after being compressed to the specified length.

What does a testing and marking system for springs do?

In testing and marking systems, the suspension springs are automatically tested, color-coded, and marked. Measurement functions such as force-displacement testing and laser measurement of the coil position are also used here to ensure product quality and thus the safe use of the chassis technology.

Systems from Schneider Technologies: An investment that pays off

Whether suspension springs or torsion springs – our production and testing facilities ensure the high quality of your chassis technology. The production range includes:

  • Semi-automatic pneumatic and hydraulic machines for cold settingn
  • Fully automated lines for hot setting
  • Semi-automated and fully automated lines for testing and marking
  • Fully automatic cold winding machines

More from our product range springs

Coiler cold forming springs

  • Coil material & bar material
  • 11 controlled servo axes
  • Drive winding via torque motor
  • Tension and compression springs
  • Conical springs
  • left- and right-hand coiled
  • mandrel diameter: Ø 50 - 390 mm
  • DWire thickness: Coil material: Ø 8 - 36 mm
    Rod: Ø 8 - 26 mm
  • Coil lengths: Tension/compression: 50 - 1,300 mm
    Con. Spring: 100 - 600 mm
  • Material strengths: SFD wire: 2,000 N/mm² (Ø 8-19 mm)
    51CrV4: 900 N/mm² (Ø 8-36 mm)
  • Coiling ratio: SFD wire: ≤ 2.5 (Ø 8-19 mm)
    51CrV4: ≤ 2(Ø 8-36 mm)
  • Automatic unloading
  • Coil weight: max. 2,500 kg

Hot setting line springs

  • Integration into automatic production line
  • Transfer spring from furnace
  • 2 x 4-fold portal loading system
  • 4-fold setting press
  • Presses hydr. driven
  • Tension and compression springs
  • Conical springs
  • left and right coiled
  • wire thickness: Ø 8 - 20 mm
  • spring diam.: Ø 80 - 200 mm
  • Spring lengths: 150 mm - 600 mm
  • Weight: 0,9 - 8,0 kg
  • Strength: 1,800 - 2,200 N/mm²
  • Capacity: 850 - 1,000 pieces/ hr.

Test and Marking Line Springs

  • Integration into autom. production line
  • Transfer of springs from paint shop
  • 2 x 4-fold portal loading system
  • 4-fold test press
  • presses hydr. driven
  • color coding and autom. deposit
  • Tension and compression springs
  • Conical springs
  • left and right coiled
  • wire thickness: Ø 8 - 20 mm
  • spring diameter: Ø 80 - 200 mm
  • Spring length: 150 mm - 600 mm

Testing and marking system springs

  • Manual loading and unloading
  • transport with linear transfer system
  • 2-fold test press (servo motorized)
  • Force-displacement testing
  • Laser measurement of coil position
  • Color marking
  • Marking (ink-jet)
  • Labeling (optional)

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