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H T Wang – One of the best experts on this subject based on the ideXlab platform.

  • a theoretical and experimental investigation into five dof dynamic characteristics of an Aerostatic Bearing spindle in ultra precision diamond turning
    International Journal of Machine Tools & Manufacture, 2013
    Co-Authors: S J Zhang, H T Wang

    Abstract:

    Abstract In ultra-precision diamond turning (UPDT), spindle vibration has great influence on machining precision of high precision optical components. However, the spindle-vibration mechanism has not been fully understood. In this study, mathematical solutions for a proposed five-degree-of-freedom (FDOF) dynamic model of an Aerostatic Bearing spindle are derived to explore natural mechanisms of spindle vibration. Thus, the potential benefits of the solutions are to be applied for the prediction and optimization of the effects of spindle vibration on surface generation. Its dynamic characteristics possess three translational frequencies along the radial and axial directions, a spindle rotational frequency (SRF), and a pair of coupled tilting frequencies (CTFs) around the radial directions influenced the SRF. The theoretical results are identified by the frequency characteristics of thrust cutting forces, and the periodic, concentric, spiral, radial and two-fold patterns (PCSRPs) of the machined and simulated surface topographies, respectively.

  • A theoretical and experimental investigation into five-DOF dynamic characteristics of an Aerostatic Bearing spindle in ultra-precision diamond turning
    Elsevier, 2013
    Co-Authors: S J Zhang, To S, H T Wang

    Abstract:

    In ultra-precision diamond turning (UPDT), spindle vibration has great influence on machining precision of high precision optical components. However, the spindle-vibration mechanism has not been fully understood. In this study, mathematical solutions for a proposed five-degree-of-freedom (FDOF) dynamic model of an Aerostatic Bearing spindle are derived to explore natural mechanisms of spindle vibration. Thus, the potential benefits of the solutions are to be applied for the prediction and optimization of the effects of spindle vibration on surface generation. Its dynamic characteristics possess three translational frequencies along the radial and axial directions, a spindle rotational frequency (SRF), and a pair of coupled tilting frequencies (CTFs) around the radial directions influenced the SRF. The theoretical results are identified by the frequency characteristics of thrust cutting forces, and the periodic, concentric, spiral, radial and two-fold patterns (PCSRPs) of the machined and simulated surface topographies, respectively.Department of Industrial and Systems Engineerin

  • dynamic characteristics of an Aerostatic Bearing spindle and its influence on surface topography in ultra precision diamond turning
    International Journal of Machine Tools & Manufacture, 2012
    Co-Authors: S J Zhang, Suet To, C F Cheung, H T Wang

    Abstract:

    Abstract In ultra-precision diamond turning (UPDT), Aerostatic Bearing spindle vibration plays the major part in many factors that influence surface topographies. In this paper, a five-degree-of-freedom dynamic model for an Aerostatic Bearing spindle is built up to describe its dynamic responses, involving translational motions and tilting motions, and to analyze the effects on surface topography of the spindle vibration under different cutting processes in UPDT. It was found that the spindle processes at the axial natural frequency along the axial direction, the radial natural frequency along the radial directions and the twin tilting natural frequencies around the radial directions, and when cutting develops from outside to the center of the machined surface, the dominant effects of the spindle’s tilting motions on surface topography gradually disappear and the axial translational motion produces a great influence on surface topography. This was identified by the experimental results.

S J Zhang – One of the best experts on this subject based on the ideXlab platform.

  • a theoretical and experimental investigation into five dof dynamic characteristics of an Aerostatic Bearing spindle in ultra precision diamond turning
    International Journal of Machine Tools & Manufacture, 2013
    Co-Authors: S J Zhang, H T Wang

    Abstract:

    Abstract In ultra-precision diamond turning (UPDT), spindle vibration has great influence on machining precision of high precision optical components. However, the spindle-vibration mechanism has not been fully understood. In this study, mathematical solutions for a proposed five-degree-of-freedom (FDOF) dynamic model of an Aerostatic Bearing spindle are derived to explore natural mechanisms of spindle vibration. Thus, the potential benefits of the solutions are to be applied for the prediction and optimization of the effects of spindle vibration on surface generation. Its dynamic characteristics possess three translational frequencies along the radial and axial directions, a spindle rotational frequency (SRF), and a pair of coupled tilting frequencies (CTFs) around the radial directions influenced the SRF. The theoretical results are identified by the frequency characteristics of thrust cutting forces, and the periodic, concentric, spiral, radial and two-fold patterns (PCSRPs) of the machined and simulated surface topographies, respectively.

  • A theoretical and experimental investigation into five-DOF dynamic characteristics of an Aerostatic Bearing spindle in ultra-precision diamond turning
    Elsevier, 2013
    Co-Authors: S J Zhang, To S, H T Wang

    Abstract:

    In ultra-precision diamond turning (UPDT), spindle vibration has great influence on machining precision of high precision optical components. However, the spindle-vibration mechanism has not been fully understood. In this study, mathematical solutions for a proposed five-degree-of-freedom (FDOF) dynamic model of an Aerostatic Bearing spindle are derived to explore natural mechanisms of spindle vibration. Thus, the potential benefits of the solutions are to be applied for the prediction and optimization of the effects of spindle vibration on surface generation. Its dynamic characteristics possess three translational frequencies along the radial and axial directions, a spindle rotational frequency (SRF), and a pair of coupled tilting frequencies (CTFs) around the radial directions influenced the SRF. The theoretical results are identified by the frequency characteristics of thrust cutting forces, and the periodic, concentric, spiral, radial and two-fold patterns (PCSRPs) of the machined and simulated surface topographies, respectively.Department of Industrial and Systems Engineerin

  • dynamic characteristics of an Aerostatic Bearing spindle and its influence on surface topography in ultra precision diamond turning
    International Journal of Machine Tools & Manufacture, 2012
    Co-Authors: S J Zhang, Suet To, C F Cheung, H T Wang

    Abstract:

    Abstract In ultra-precision diamond turning (UPDT), Aerostatic Bearing spindle vibration plays the major part in many factors that influence surface topographies. In this paper, a five-degree-of-freedom dynamic model for an Aerostatic Bearing spindle is built up to describe its dynamic responses, involving translational motions and tilting motions, and to analyze the effects on surface topography of the spindle vibration under different cutting processes in UPDT. It was found that the spindle processes at the axial natural frequency along the axial direction, the radial natural frequency along the radial directions and the twin tilting natural frequencies around the radial directions, and when cutting develops from outside to the center of the machined surface, the dominant effects of the spindle’s tilting motions on surface topography gradually disappear and the axial translational motion produces a great influence on surface topography. This was identified by the experimental results.

Junwen Wang – One of the best experts on this subject based on the ideXlab platform.

  • A calculation method on the performance analysis of the thrust Aerostatic Bearing with vacuum pre-load
    Tribology International, 2017
    Co-Authors: Ming Huang, Baorui Wang, Junwen Wang

    Abstract:

    Abstract Thrust Aerostatic Bearing with vacuum pre-load (VPL pads) is a kind of effective supporting structure with simple mechanism and well stiffness. In this paper, a calculation method is presented to calculate the static characteristics of the VPL pads. Based on finite difference method (FDM), an efficient iterative algorithm is developed to decrease the iterative times. Compared to the experiment results, it shows that the calculation method can predict the static characteristics exactly.