Servo-hydraulic Testing Machines HA-model0 pages

Product Information
Servo-­ ydraulic load frames – HA Series
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HA 100 on air-springs with hydraulic wedge grips
Drawing of HA load frame
Application
The frames feature extremely high-precision alignment.
After installation of the testing actuator and load cell the
alignment accuracy is +0.1 mm per meter; for distances
less than 350 mm the offset is a constant 0.05 mm.
Plane parallelism is equal to or better than 0.03 mm per
100 mm.
With the testing actuator installed in the lower crosshead and the load cell on the upper crosshead, HA series load-frames represent the classical servo-hydraulic
testing machine as used for determination of material
characteristic values under dynamic loading, e.g. S-N
test (fatigue test), fracture mechanics, LCF (low-cycle
fatigue).
Description of operation
PI519 2.1112
These 2-column load frames are designed for materials testing under dynamic load in a closed load path.
The frame is supported on anti-vibration leveling units,
ensuring negligible force transmission to the floor during
normal operation. Where tests or environmental conditions are of a critical nature it is advisable to use the
optionally available air-springs, which have a natural
frequency of approximately 3 – 6 Hz.
HA load frames have particularly high axial and lateral
stiffness, enhancing testing system performance and
enabling higher frequencies and specimen deformations. In addition, high lateral forces which can occur
during compression and flexure tests are easily absorbed, making the frames suitable for combined tensile or
compression/torsion loads.
PI519_HA_Serie.indd
All fixtures are mounted via a flange with centering ring,
eliminating the need for subsequent alignment of the
load path.
Features
•t4 standard nominal capacities from 50 kN to 500 kN
•tactuator recessed into the lower crosshead to minimize piston rod length.
•tergonomic working height
•tparticularly suitable for integration of a high-temperature furnace or chamber
•thard-chromed columns for precise guiding of upper
crosshead
•thydraulic clamping and adjustment for easy positioning of upper crosshead
•tintegrated oil-drip tray for collecting minor leakage
•tsafety guard to comply with EC Machinery Directive,
depending on application