HC series servohydraulic testing machineTable-Top Model, Actuator in the Upper Crosshead Download
- Construction materials
- 10 kN - 25 kN
- Fracture mechanics
- ISO 12106
- ASTM E606
- DIN 50100
- ASTM E399
- ASTM E647
- ASTM E466
While the HA and HB models are floor-standing, allowing equipment assembly at an optimum operating height, the HC models from 10 to 25 kN are table-top models. They can be positioned on a workbench, for example. A concrete base can optionally be supplied as a support. With all HC models the actuator is positioned above the test area, which is equipped with a T-slotted platform.
The 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.
Advantages & Features
- 2-column frame for dynamic tests up to 25kN.
- Testing actuator located in upper crosshead.
- Suitable for 10 kN and 25 kN axial actuators.
- Suitable for combined tensile and compression/torsion actuator with maximum torque of 250 Nm.
- Hard-chromed T-slotted platform and columns for tests in corrosive media.
- The entire test, together with set-up and control of automatic extensometers and specimen grips, is run via the display-equipped remote control unit.
- Wide accessory range: temperature chamber, compression platens, specimen grips, flexure test kit etc.
- Optional hydraulic adjustment for easy positioning of upper crosshead.
- Safety housing for compliance with CE Machinery Directive depending on application.
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.
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.
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.
|Test area height||Standard||Extended by 250 mm||Extended by 500 mm|
|Dynamic nominal force||25||25||25||kN|
|A – max. height of test frame||1325||1575||1825||mm|
|AG100 – max. test-frame height with 100mm-stroke actuator||1865||2115||2365||mm|
|AG250 – max. test-frame height with 250mm-stroke actuator||2165||2415||2665||mm|
|B – max. width of test frame||660||660||660||mm|
|C – max. depth of test frame||450||450||450||mm|
|D1 – distance between columns||460||460||460||mm|
|E – column diameter||65||65||65||mm|
|F – height of top edge of lower crosshead||75||75||75||mm|
|G – max. test area height1||1070||1320||1570||mm|
|H – max. working test area height2||310 to 1010||560 ... 1260||810 to 1510||mm|
|J – crosshead adjustment path3||700||700||700||mm|
|K – weight4||300||315||330||kg|
|Frame stiffness at 1000mm crosshead separation||300||300||300||kN/mm|
|Clamping/ adjustment: manual/manual||1037238||1037462||1037469|
|Clamping/ adjustment: manual/hydraulic||1036930||1036931||1037473|
- Distance between upper and lower crossheads
- Distance between piston flange and base crosshead with piston retracted
- For frames with hydraulic adjustment only
- Weight without actuator, load cell, or any fixtures
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: