Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/11506
Title: Investigation of the effects of spindle unbalance induced error motion on machining accuracy in ultra-precision diamond turning
Authors: Huang, P
Lee, WB 
Chan, CY 
Keywords: Aerostatic bearing spindle
Spindle dynamics behavior
Spindle error motion
Ultra-precision diamond turning
Unbalance effect
Issue Date: 2015
Publisher: Elsevier
Source: International journal of machine tools and manufacture, 2015, v. 94, p. 48-56 How to cite?
Journal: International journal of machine tools and manufacture 
Abstract: In ultra-precision machining, error motions of the aerostatic bearing spindle (ABS) have significant effects on the machining accuracy. Spindle unbalance is a critical factor attributing to error motions of the ABS. Much work currently has been focused on the measurement of error motions and spindle balancing. However, the unbalance induced spindle error motion (UISEM) and the corresponding effects on machining accuracy are not well understood. In this paper, a dynamics model of the ABS was established to characterize the UISEM and its dynamic behavior with consideration of the unbalance effects. A series of groove turning experiments were especially designed to investigate the UISEM. Good agreement between theoretical and experimental results was achieved, demonstrating the low frequency enveloping phenomenon of the error motions of the ABS, identified as the unique superposition effects of two motion components at high frequency in the spindle vibration. In addition, the experimental result reveals that the relative distance between the rotational axis of the ABS and the tool tip varies with respect to the different spindle speeds, significantly degrading the machining accuracy.
URI: http://hdl.handle.net/10397/11506
ISSN: 0890-6955
EISSN: 0890-6955
DOI: 10.1016/j.ijmachtools.2015.04.007
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