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HA series servohydraulic testing machine

Actuator in the lower crosshead Download
Industries
  • Metals
  • Automotive
  • Academia
  • Construction materials
Test load
  • 50 kN - 500 kN
Type of test
  • Fatigue
  • Fracture mechanics
Standards
  • ISO 12106
  • ASTM E606
  • DIN 50100
  • ASTM E399
  • ASTM E647
  • ASTM E466

The perfect testing machine for fatigue tests under temperature

Standard versions of the HA series fatigue testing machines in the 50 to 500 kN range have the testing actuator mounted in the lower crosshead, below the test area. They are ideal for test arrangements that require temperature chambers or furnaces to be installed in the test area. The positioning of the actuator prevents heated air from rising and causing heating of the actuator; it also prevents oil from dripping into the heated test area.

LCF (low cycle fatigue) testing is among the tests that can be performed using the HA load frame.

The HA fatigue testing machine's test frame features extremely high stiffness, resulting in natural resonance. To avoid unwanted flexural stresses in the specimen the load frames are accurately aligned.

The final element in our dynamic testing product portfolio is the manufacture of all the necessary accessories such as hydraulic power packs, servohydraulic testing actuators, or hydraulic distribution units. Our portfolio is constantly being expanded through a program of continuous development and inclusion of new products, allowing us to satisfy our customer’s most demanding quality requirements while continually improving the quality of our products.

Fatigue test on springs

Fatigue tests on springs with an HA100 servohydraulic testing machine

Advantages & Features

Advantages & Features

Description
Advantages & Features
Hydraulic Power Packs
Servohydraulic Testing Actuator
Hydraulic Distribution Unit

Description

  • HA series servohydraulic testing machines are available in various sizes for test loads from 50 kN to 500 kN.
  • The standard testing actuator stroke is 100 mm or 250 mm.
  • The servohydraulic testing machine can be supplied for 210 bar or 280 bar system pressure.
  • The load cell is attached to the upper crosshead as standard.
  • The upper crosshead is adjustable. It can be optionally equipped with a hydraulic crosshead clamping and lift cylinders.

Advantages & Features

  • 4 standard nominal ratings from 50 kN to 500 kN
  • convenient working height
  • particularly suitable for integration of a high-temperature heating device
  • hard-chromed columns for precise guidance of upper crosshead
  • hydraulic clamping and adjustment for easy positioning of upper crosshead
  • integrated oil-sump for collecting minor leakage
  • safety housing to comply with CE Machinery Directive depending on application
Hydraulic power pack 40 l/min without noise protection

Hydraulic Power Packs

The HP series power packs feature high operational reliability and long service life. All components are mounted on top of the oil tank for easy access.

The self-priming radial-piston pump is driven by an asynchronous motor. The nine pistons are in hydrostatically balanced contact with the stroke ring. Flow rate is regulated by the stroke-ring eccentricity, which is adjusted via two control pistons located opposite each other. The pressurized oil is routed via a high-pressure filter and is then available to the appliance. A factory-set pressure relief valve prevents excessive increases in pressure.

Testing actuator LH2500

Servohydraulic Testing Actuator

ZwickRoell's servohydraulic testing actuators feature sturdy, robust construction and are used both in servohydraulic testing machines and as single testing actuators, for example on a clamping plate. When used in conjunction with a servo valve they enable complex loading sequences to be implemented with great accuracy.

Distribution unit

Hydraulic Distribution Unit

The hydraulic distribution unit is the electrically operated switching device in servohydraulic testing machines. It connects or disconnects the hydraulic pressure for a servohydraulic testing actuator or servohydraulic testing machine. A connecting valve is allocated to each consumer, allowing them to be switched independently of each other. The modular design enables addition of an extra switching manifold whenever required.

Technical overview

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Related products and accessories

Common fatigue tests

Materials and components may fail prematurely under oscillating loads. For this reason, the behavior of materials under alternating mechanical loading is an important decision criterion, for which the necessary data are obtained through testing.

There are two categories of fatigue in materials testing:

Low cycle fatigue (LCF) test

In the low cycle fatigue (LCF) test to ISO 12106 / ASTM E606, the specimen is tested at high cycle amplitudes and plastic deformation.
to Low cycle fatigue (LCF) test

High Cycle Fatigue Test / S-N Test

In the high cycle fatigue test (also S-N test) to DIN 50100 the specimen is tested at medium and low cycle amplitudes.
to High Cycle Fatigue Test / S-N Test

Downloads

Name Type Size Download
  • Product information: HA series servohydraulic testing machine PDF 398 KB
  • Product information: Hydraulic distribution unit PDF 396 KB
  • Product information: Hydrostatic single testing actuator 10-50 kN PDF 540 KB
  • Product information: Hydrostatic single testing actuator 100-1000 kN PDF 480 KB
  • Product information: 20 l/min. hydraulic power pack PDF 567 KB
  • Product information: 40 l/min. hydraulic power pack PDF 567 KB
  • Product information: 80 l/min. hydraulic power pack PDF 598 KB
  • Product information: 170 l/min. hydraulic power pack PDF 391 KB
  • Product brochure: Dynamic PDF 5 MB

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