TE 44 PIEZO FRETTING RIG





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    Description

    The TE 44 Piezo Fretting Rig incorporates a piezo actuator driven by a high frequency analogue controller, which derives its set points via a 16 bit control and data acquisition card from a standard PC, running COMPEND 2020 software. Real time adaptive control features provided within the software allows high precision control of the actuator when working against highly non-linear loads. Sine, square and triangular waveforms may be programmed and at oscillating frequencies up to 100 Hz.
     
    A servo pneumatically controlled loading system is provided for performing conventional parallel motion fretting tests. With the loading system disabled, the specimen orientation can be changed from parallel to perpendicular motion, allowing hertzian fretting, impact fretting and depth sensing micro-hardness tests to be performed. Specimen heating is provided for the parallel motion test configuration only.
     
    Sensors include:
    Piezo Transducer for:
    • Friction Force
    • Hertzian Fretting Load
    • Impact Force
    Strain Gauge Transducer for:
    • Parallel Motion Load
    Strain Gauge Transducer for:
    • Hardness Indentation Force
    Capacitance Probe for:
    • Displacement Measurement

     

    Piezo Actuators

    Two choices of actuator are available. TE 44-100 uses a 100 micron stroke actuator, whereas TE 44-500 incorporates a much larger actuator, giving continuously adjustable stroke lengths up to 500 microns.

    Parallel Motion Fretting


     

    Hertzian Fretting


     

    Impact Fretting


     

    Depth Sensing Micro-hardness


     

    TE 44-500 Extended Stroke Piezo Actuator


  • Technical Specifications

    Type of Contact – Fretting/Sliding: Ball/Flat
    Flat/Flat
    Line/Flat
    Type of Movement: Sine, Square and Triangular
    Type of Contact – Impact Fretting: Ball/Flat @ 45 degree Impact Angle
    Type of Contact – Hertzian Fretting: Ball/Flat
    Type of Contact – Diamond Indenter: Depth Sensing Micro-hardness (Vickers)
    Displacement Control: Adaptive control of amplitude and mid-stoke position
    5 to 1000 N
    Loading Rate: 50 N/s
    Temperature Range: Ambient to 200°C – Fretting/Sliding Only
    Heating Power: 200 W
    Temperature Sensor: k-type thermocouple
    Friction Force: +/-500 N Maximum
    Stroke Measurement: Capacitance Probe
    Full-scale Range: 0 to 1 mm
    Resolution: 0.2 µm
    High Speed Interface: USB
    Resolution: 16 bit
    Number of Input Channels: 6
    Maximum Data Rate: Six channels at 50 kHz
    Low Speed Interface: USB
    Resolution: 12 bit
    Number of Input Channels: 1 to 8
    Number of Output Channels: 1 to 4
    Maximum Data Rate: 10Hz

    TE 44 – 100 Micron
    Actuator: Piezocomposite Stack
    Maximum Stroke: 100 µm (50 µm Amplitude)
    Stiffness: 60 N/µm
    Resonant Frequency: 15 kHz
    Maximum Force: 12,000 N
    Maximum Tensile Force: 1,500 N
    Amplifier: 1000 volt
    Stroke – continuously variable: 0 to 100 microns
    Resolution: +/-0.2 microns
    Maximum Frequency: 500 Hz
    Minimum Frequency: 1 Hz
    Frequency Range: Continuously variable: 1 Hz to 100 Hz
    Maximum stroke at 100 Hz: 30 µm
    Maximum stroke at 50 Hz: 60 µm
    Maximum stroke at 20 Hz: 100 µm

    TE 44 – 500 Micron
    Actuator: Piezocomposite Stack
    Maximum Stroke: 500µm (250 µm Amplitude)
    Stiffness: 60 N/µm
    Resonant Frequency: 1 kHz
    Maximum Force: 50,000 N
    Maximum Tensile Force: 6,000 N
    Amplifier: 1000 volt
    Stroke – continuously variable: 0 to 500 microns
    Resolution: +/-0.2 microns
    Maximum Frequency: 100 Hz
    Minimum Frequency: 1 Hz
    Frequency Range: Continuously variable: 1 Hz to 100 Hz
    Maximum stroke at 100 Hz: 50 µm
    Maximum stroke at 50 Hz: 100 µm
    Maximum stroke at 20 Hz: 250 µm
    Maximum stroke at 10 Hz: 500 µm

    Controlled Parameters

    		 Frequency
    Waveform
    Stroke
    Mid-stroke Position
    Load
    Temperature
    Test Duration

    Measured Parameters

    		 Frequency
    Stroke Displacement
    Load
    Friction
    Temperature
    Depth Sensing (Micro-hardness)

  • Overview Videos

     

    Machine Overview


     

  • Index Tags

    ball on plate
    depth sensing micro-hardness
    hertzian fretting
    impact fretting
    parallel-motion-fretting
    research tribometers

     

  • Download the Machine Leaflet