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http://dx.doi.org/10.5762/KAIS.2017.18.1.238

Analysis of Dynamic Behavior and Balancing of High Speed Spindle  

Koo, Ja-Ham (Department of Bio-Industrial Machinery Engineering, Pusan National University)
Kwon, Soon-Goo (Department of Bio-Industrial Machinery Engineering, Pusan National University)
Kim, Jong-Soon (Department of Bio-Industrial Machinery Engineering, Pusan National University)
Publication Information
Journal of the Korea Academia-Industrial cooperation Society / v.18, no.1, 2017 , pp. 238-244 More about this Journal
Abstract
A spindle with a built-in motor can be used to simplify the structure of a machine tool system, but the rotor inevitably has unbalanced mass. This paper presents an analysis of the dynamic behavior. The spindle was used in a CNC lathe and investigated using the finite element method and transfer matrices. The high-speed spindle can be very sensitive to the rotation of an unbalanced mass, which has a harmful effect on many machine tools. Thus, a balancing procedure was performed with a spindle-bearing system for the CNC lathe by numerical analysis. The balancing was performed through the influence coefficient method, and the whirl orbit radii before and after balancing were compared to evaluate the effects. The results show that the rotational speed of the spindle seriously affects the whirl responses of the spindle. The whirl responses were also affected by other factors, such as the unbalanced mass and bearing stiffness. The balancing of the assembled spindle model significantly reduced the whirl orbit magnitude.
Keywords
FETM; Influence coefficient method; Balancing of rotating mass; Spindle; Unbalanced mass; Whirl orbit;
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Times Cited By KSCI : 2  (Citation Analysis)
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