Ensaio Fretting Rtec Série FFT


Fretting Tester - Designed for Lubricant and Material Study


Fretting Tester - Designed for Lubricant and Material Study

The state of the art fretting wear tester has industry leading specifications on stroke and frequency. Controlled stroke from 5 micron at 500 hZ frequency across a wide temperature range makes it an ideal fretting wear testing for both industry and university research.

Main Features
● 5 micron to 4mm Stroke , Upto 500Hz
● Piezo Sensors
● Electromagnetic Coils
● Environmental Control Chambers
● Dual, Single, Mini Coil Models (friction force range)

Down Force Control
The applied forces can be controlled to gram force ranges with ease. Real time correction to account for sample wear, force change. The force can be maintained constant or dynamically changed during the test.

Voice Coil
Electromagnetic actuators that imparts fretting motion. Dependent on the number of coils and coil power FFT series comes in 3 standard modules. FFT-m1, FFT-m2, FFT-1, FFT-2

High Accuracy Position Control
The most accurate and precise displacement control in the market. Up to 1nm resolution and micron level of accuracy. Extremely low noise and High responsiveness for dynamic performance of system

Environmental Controller
The environmental chamber allows to control and measure temperature and humidity. Dual high resolution thermocouple allows to measure heater temperature and the sample/lubricant temperature independently.

Unmatched Waveform Control
Without the friction of rolling or bearings, the magnetic flexure based design provides the control required for the most sensitive of tests. The motor controls the smallest of increments of waveform change precisely to stroke control

Friction Measurement
The tester comes with advanced piezo sensors to measure real time friction at high frequency. Ultralow noise amplifiers allows to detect minute changes
in friction in real time with ease.

Additional In line Sensors
Sensors such as Acoustic emission to detect onset of cracks, ECR to measure surface resistance change allows to gain more insight on the material interface.

Liquid Containers, Sample holder
Liquid and sample holder both for standard and non standard tests. The holders and liquid container are easy to customise based on specific application need.

Fretting wear is a test where surface damage occurs between two contacting surfaces experiencing oscillatory displacement of small amplitude. At the contact point, lubricant/coating is squeezed out or the low amplitude motion does not permit the contact area to be re lubricated/ debris dislodge resulting in serious local wear occurs. This type of wear causes two-body abrasion, adhesion and/or fretting fatigue wear.

Fretting Tester Models - Difference in Voice Coil Power For Friction Force

All Rtec Fretting test machines are constructed on flexure based designs. The motion is imparted using electromagnetic actuators with real time stroke and wave form correction controllers. The difference in model lies in the power the coil can impart during the test

●FFT-2  5000N Down Force (Floor Standing, Dual High Power Coil)

●FFT-1  3000N Down Force (Floor Standing, Single High Power Coil)

●FFT-M2 1000N Down Force (Bench Top, Dual Medium Power Coil)

●FFT-M1 300N Down Force (Bench Top, Single Medium Power Coil)

Force sensors - The tester uses high resolution, fast frequency response piezo sensors to measure real time inline friction forces.

Reliability on long runs - The unique flexure suspension guides the magnet assembly without contact or lubrication. The magnet, coil and stators are designed to eliminate performance degradation over time and deliver near maintenance free operation for wear test.

Position Sensor and Control - The most accurate and precise displacement sensor control on the market • Up to 1nm resolution and micron level of accuracy • Extremely low noise

Platform Rigidity - Vibration dampening frame, symmetrical design, rigid samples holders etc. allows for high system stiffness. High rigidity allows to create fretting loops with ease.

Environmental Chambers - Wide temperature from -40 to 1000C range allows the fretting tester to simulate several real life scenarios easily.  

Inline Sensors - Sensors such as Acoustic emission to detect onset of cracks, ECR to measure surface resistance change allows to gain more insight on the test interface.

Data And Analysis

Fretting Loops
Rigid design with accurate real time friction force allows to create fretting loops at different temperature, load etc.

Real time Friction curves at 300Hz, 3000N
The graph showing real time friction data at 300Hz, 2300N test on dry material fretting test.

Fretting Failure Marks
Rtec 3D profilometer allows to create 3D images of surfaces with ease.

FFT series fretting wear test rig are optimized for friction, wear, fretting fatigue tests at small amplitude and high frequency. The module is very powerful tool in the hand of the researcher or QC engineer.

Keywords - Fretting wear test machine, Fretting test rig