Thermo-mechanical modeling of high speed spindles

Zahedi, A ; Sharif University of Technology | 2012

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  1. Type of Document: Article
  2. DOI: 10.1016/j.scient.2012.01.004
  3. Publisher: 2012
  4. Abstract:
  5. Prediction of the thermo-mechanical behavior of machine-tool spindles is essential in the reliable operation of high speed machine tools. In particular, the performance of these high speed spindles is dependent on their thermal behavior. The main source of heat generation in the spindle is the friction torque in angular contact ball bearings. This paper presents an effort to develop a comprehensive model of high speed spindles that includes viable models for the mechanical and thermal behavior of its major components, i.e., bearings, shaft and housing. Spindle housing and shaft are treated as six-degree-of-freedom Timoshenko beam elements. Bearings are modeled as two-node elements with five displacements and a thermal load component at each node. Mutual interaction between the thermal and structural behavior of both spindle shaft/housing and bearings is characterized through thermal expansion and the rate of heat generation/transfer. Components are combined to form a finite element model for the thermo-mechanical analysis of spindle-bearing systems. The results of simulation for a typical spindle system are presented
  6. Keywords:
  7. Angular contact ball bearings ; Coupled thermo-mechanical behavior ; High speed spindles ; Thermally induced preload ; Angular contact ball bearing ; Comprehensive model ; Coupled thermo-mechanical ; Finite element models ; Friction torque ; High-speed machine tools ; High-speed spindle ; Load components ; Mutual interaction ; Pre loads ; Reliable operation ; Six-degree-of-freedom ; Spindle housing ; Spindle shaft ; Spindle systems ; Spindle-bearing system ; Structural behaviors ; Thermal behaviors ; Thermo-mechanical analysis ; Thermo-mechanical behaviors ; Thermomechanical modeling ; Timoshenko beams ; Ball bearings ; Housing ; Machine tools ; Mechanical engineering ; Bearings (machine parts) ; Dynamic response ; Finite element method ; Heat transfer ; Performance assessment ; Prediction ; Shaft ; Thermal expansion ; Thermomechanics ; Torque
  8. Source: Scientia Iranica ; Volume 19, Issue 2 , 2012 , Pages 282-293 ; 10263098 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S1026309812000454