•  Description

    The DN 44 Dry & Lubricated Reciprocating Sliding & Fretting Machine incorporates a servo hydraulic 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, triangular and random waveforms may be programmed and, depending on the physical capabilities of the hydraulic system, oscillating frequencies up to 200 Hz may be controlled.

    The machine is designed for fretting and fretting fatigue tests with nominal relative movement between contacting surfaces in the range 20 microns to 80 microns. It may also be used for sliding reciprocating tests at strokes up to 20 mm. Servo hydraulic actuation with piezo transducer friction force measurement and servo controlled loading with force transducer feedback.

    DN 44/1 Small Perturbation Signal Generator

    This optional additional signal generator and signal analysis system allows combined sliding motion with co-axial vibration to be generated. The standard servo amplifier incorporates a summing junction on the input stage with dual inputs. This means that with the addition of a second signal generator, two separate signal inputs, one low frequency and long stroke and one high frequency and short stroke, can be combined, thus producing reciprocating motion with superimposed vibration from a single servo hydraulic actuator.

  • Technical Specifications

    Type of contact: Ball/Flat
    Type of Movement: Sine, Square, Triangular and Random
    Load: 5 to 1,000 N
    Friction Force: +/-500 N Maximum
    Stroke – continuously variable: 10 microns to 20 mm
    Frequency: 0.1 Hz to 200 Hz
    Environment: Dry or Lubricated
    Temperature: Ambient to 600°C
    Super High Response Servo Valve: 12 l/min
    Actuator Bearings: Hydrostatic
    Dynamic Load: 5.7 kN
    Static Load: 8.6 kN
    Hydraulic Power Pack: 12 l/min at 250 bar
    High Speed Interface: USB ADC
    Resolution: 16 bit
    Number of Input Channels: 1 to 6
    Maximum Data Rate: All channels at 50 kHz
    Interface: Phoenix Tribology USB micro-controller interface
    Software: COMPEND 2020
    DN 44/1 Small Perturbation Signal Generator
    Type of Movement: Sinusoidal sliding stroke with co-linear superimposed sinusoidal perturbation
    Sliding Motion:
    Maximum Stroke: 20 mm (Amplitude: 10 mm)
    Type of Movement: Sinusoidal
    Frequency (FS): 0 to 5 Hz
    Vibration Motion:
    Stroke/Frequency: 200 microns (Amplitude 100 microns) @ 0 to 200 Hz
    100 microns (Amplitude 50 microns) @ 0 to 300 Hz
    Frequency (FP): 0 – 300 Hz
    Control Requirements: FP must be greater than FS x 20
    Controlled Parameters Frequency
    Test Duration
    Measured Parameters Frequency
    Electrical Contact Resistance
    Electricity: 380/415V, three phase + neutral, 50 Hz, 7.5 kW
    380/415V, three phase + neutral, 60 Hz, 7.5 kW
    Mains water and drain: 10 l/min (typical)

  • Applications

    ball on plate
    fretting wear
    reciprocating sliding
    sliding line contact

  • Publications

    Paper # 374 An Investigation on Fretting Wear Life of Bonded MoS2 Solid Lubricant Coatings in Complex Conditions
    Xu J, Zhu M H, Zhou Z R, Kapsa P, Vincent L
    Wear 255 (2003) 253 – 258
    Paper # 385 On the Friction and Wear Behaviour of Human Tooth Enamel and Dentin
    Zheng J, Zhou Z R, Zhang J, Li H, Yu H Y,
    Wear 255 (2003) 967 – 974
    Paper # 453 Effect of surface treatment by ceramic conversion on the fretting behavior of NiTi shape memory alloy
    H Yang, L Qian, Z Zhou, X Ju, H Dong
    Tribology Letters Volume 25, Number 3 / March, 2007 p. 215-224
    Paper # 461 Fretting wear behavior of n-ZrO 2/Ni composite coating prepared by brush electroplating.
    B Jiang, BS Xu, SY Dong, ZW Ou
    Mocaxue Xuebao (Tribology). Vol. 25, no. 6, pp. 515-519. Nov.-Dec. 2005
    Paper # 493 Microstructure and fretting wear behavior of Ni based composite coatings reinforced by SiO(2) nanoparticles
    HM Wang, B Jiang, BS Xu, SN Ma, SY Dong
    Mocaxue Xuebao (Tribology). Vol. 25, no. 4, pp. 289-293. July-Aug. 2005
    Paper # 541 The role of phase transition in the fretting behavior of NiTi shape memory alloy
    L Qian, Z Zhou, Q Sun
    Wear 259 (2005) Page 309–318
    Paper # 634 A practical methodology to select fretting palliatives: Application to shot peening, hard chromium and WC-Co coatings
    K Kubiak, S Fouvry, AM Marechal
    Wear Volume 259, Issues 1-6, July-August 2005, p. 367-376
    Paper # 637 Effect of ceramic conversion treatments on the surface damage and nickel ion release of NiTi alloys under fretting corrosion conditions
    H Dong, X Ju , H Yang, L Qian and Z Zhou
    Journal of Materials Science: Materials in Medicine Issue Volume 19, Number 2 / February, 2008 p. 937-946
    Paper # 638 The role of martensite reorientation in the fretting behaviour of nickel titanium shape memory alloy
    Qian L, Sun Q, Zhou Z
    Proceedings of the I MECH E Part J Journal of Engineering Tribology, Volume 222, Number 7, 2008 , pp. 887-897
    Paper # 639 Fretting wear behavior of conventional and nanostructured Al2O3–13 wt%TiO2 coatings fabricated by plasma spray
    W Tian, Y Wang and Y Yang
    Wear Volume 265, Issues 11-12, 26 November 2008, p. 1700-1707
    Paper # 780 Relationships between the fretting wear behavior and the ball cratering resistance of solid lubricant coatings
    DB Luo, V Fridrici
    Surface and Coatings Technology 2010 Volume 204, Issue 8, p. 1259-1269
    Paper # 784 Selecting solid lubricant coatings under fretting conditions
    DB Luo, V Fridrici
    Wear 2010 Volume 268, Issues 5-6, p. 816-827
    Paper # 788 Surface property enhancement of Ni-free medical grade austenitic stainless steel by low-temperature plasma carburising
    J Buhagiar, L Qian
    Surface and Coatings Technology 2010 Volume 205, Issue 2, p. 388-395
    Paper # 823 Effect of low-temperature plasma carbonitriding on the fretting behaviour of 316LVM medical grade austenitic stainless steels
    J Liu, H Dong, J Buhagiar, CF Song, BJ Yu
    Wear Volume 271, Issues 9-10, 29 July 2011, Pages 1490-1496
    Paper # 880 Study on the Fretting Wear Behavior and Mechanism of Nuclear Alloy 690 Tube
    JN Mei, F Xue, ZX Wang, GD Zhang
    Advanced Materials Research (Volumes 512 – 515) Pages 1740-1746
    Paper # 907 Friction and Wear Behavior of Human Teeth
    ZR Zhou, HY Yu, J Zheng, LM Qian, Y Yan
    Dental Biotribology 2013, pp 43-73
    Paper # 908 Effect of the Oral Environment on the Tribological Behavior of Human Teeth
    ZR Zhou, HY Yu, J Zheng, LM Qian, Y Yan
    Dental Biotribology 2013, pp 75-115
    Paper # 1116  Experimental Study of the Fretting Wear Behavior of Incoloy 800 Alloy at High Temperature
    XY Zhang, JH Liu, ZB Cai, JF Peng, MH Zhu
    Tribology Transactions – Volume 60, 2017 – Issue 6
    Paper # 1161 Experimental study of the fretting wear behavior of Inconel 690 alloy under alternating load conditions
    XY Zhang, ZB Cai, JF Peng, JH Liu
    IMechE Part J

    Paper # 1247   Wear behavior of seven artificial resin teeth assessed with three-dimensional measurements
    Zhichao Hao, Hongmin Yin, Linxia Wang, Yukun Meng
    The Journal of Prosthetic Dentistry 2014


  • User List

    Launched 2000

    Chengdu University China
    Nuclear Research Center – Negev Israel

  • Download the Machine Leaflet