Journal
INTERNATIONAL JOURNAL OF MACHINE TOOLS & MANUFACTURE
Volume 75, Issue -, Pages 36-45Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijmachtools.2013.08.003
Keywords
Aerostatic bearing spindle; Dynamic modeling; Spindle vibration; Surface generation; Ultra-precision raster milling
Funding
- Research Grants Council of the Hong Kong Special Administrative Region, China [PolyU 5287/10E]
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In ultra-precision raster milling (UPRM), the impulse spindle vibration induced by the impulse-like cutting forces is intrinsic and special mechanism majorly influencing surface topography. It is fundamentally distinctive with the step spindle vibration induced by the step-like cutting forces in turning. However, no work has been conducted to study surface generation under the impulse spindle vibration in UPRM in depth. Consequently, this paper theoretically and experimentally elaborates that in UPRM, (i) the impulse spindle vibration includes the axial, radial and coupled-tilting spindle vibration with damping; (ii) the excitation frequency of the impulse-like cutting forces, i.e. spindle speed, determines the spindle vibration characteristics, i.e. synchronous or asynchronous spindle vibration; (iii) the coupled-tilting spindle vibration is a predominant factor influencing surface generation; and (iv) the irregular spindle-vibration waves induced by the impulse spindle vibration produce one of the irregular, lattice-like and stripe patterns or their hybrids at a milled surface. (C) 2013 Elsevier Ltd. All rights reserved.
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