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4 Column 2 Axis Servo-hydraulic Test Machine



Crosshead at mid-height
Spring installed as test piece
Crosshead lowered
with solid test piece

Crosshead raised



Application



Testing rubber suspension components for trains. This frame is fitted with a special dual-area actuator capable of applying high mean loads as well as higher frequency dynamic cycles at lower load.


Frame

  • 4 column frame. Moveable upper crosshead. Variable daylight space 0 to 1420mm
  • Fail-safe crosshead clamping by high capacity disc springs with hydraulic cylinders to unclamp
  • Servo-hydraulic actuator for axial (vertical) loading mounted on upper crosshead
    • 500kN thrust compression for static and low frequency work
    • 80kN thrust tension and compression for high frequency
    • Stroke 300mm
    • Integral displacement transducer
    • Load cell mounted on end of actuator rod
    • Side load support bearings on rod end with support brackets mounted to under side of crosshead
  • Servo-hydraulic actuator for side (horizontal) loading application mounted to side of lower crosshead
    • 50kN thrust tension and compression fatigue rated
    • Stroke 300mm
    • Integral displacement transducer
    • Load cell mounted on end of actuator rod and connecting to side load part mounting table
  • Side load part mounting table available
  • Automatic compensation for dynamic oscillating masses in both axes – automatically corrects for the inertial load of adaptors and end fittings by using feedback from axially-mounted accelerometers.