EEF Fatigue Testing Unit

The Fatigue Testing Unit, "EEF", designed by EDIBON, allows to study the fatigue strength of the materials. For that purpose, fatigue tests are performed with different materials and notches.Optionally, with the additional recommended element Set of Small Specimens, "EEF-SSP", it is possible to study the influence of different rounding radii and surface qualities on fatigue strength.

The Fatigue Testing Unit, "EEF", is compatible with all available specimen sizes.

An electric motor is fixed to the lower panel of the unit.

One end of the test piece is joined to the motor shaft by a coupling. A disc which will count the number of rotations of the motor thanks to a device is also coupled to the shaft. On the right side of the panel, it is placed the system with which the test piece is loaded. This system, with a spring balance, is joined to a threaded spindle by its upper end, while on its lower side it is joined to an articulated guided system to which the right end of the test pieceis held. When turning the threaded spindle clockwise, an up ward vertical force is transmitted to the test piece.

The applied force can be measured with the spring balance. In order to guarantee the force verticality, the system has two guides to avoid horizontal displacements during the transmission of stress.

Likewise, in order to assure the constant application of the load, besides of allowing the test piece rotation on its axial symmetry axis, the system also allows the alignment of the coupling with the test piece, due to the bending deformation it suffers. Both the area where the test piece is located and the motor axis output are covered with a protection cage, without it the unit does notwork, since it is provided with a safety system to avoid accidents.Besides, it includes a control switch that detects when the test piece is broken and switches off the motor right away.

The unit control box is mounted on the upper panel, containing: the main (on/off) switch of the unit, the cycle counter that shows us thequantity of turns the motor shaft carries out, the motor's speed control that allows us to increase or decrease the turning speed of the electricmotor, the motor speed display that shows the motor speed, the on/off switch of the electric motor and emergency stop.

The Fatigue Testing Unit, "EEF", is an autonomous unit with its control box, being able to be connected to a computer with the additionalrecommended element Software, Sensors and Control for EEF Unit, "EEF-SSC", allowing the acquisition of the measurements made.