An improved thermal model for machine tool bearings

Xu, Mu; Jiang, Shuyun; Cai, Ying

doi:10.1016/j.ijmachtools.2006.02.018

Cited by 132 publications

(28 citation statements)

References 10 publications

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“…Based on Equation (24), thermally-induced preload is proportional to thermal deformation. Takabi [7] showed that the predicted thermally-induced preload increases rapidly during the first 400 s of operation, and then gradually decreases to zero after 2250 s, but this behavior is dependent upon the bearing configuration and operating conditions. Figure 13 shows radial thermal deformation measured during an experiment with constant speed of 3000 rpm.…”

Section: Numerical Analysismentioning

confidence: 99%

“…Min and Shuyun [7] made a precision analysis and calculation of thermal contact resistance of the bearing, improving the thermal transfer model. Takabi and Khonsari [8] developed a ball bearing mathematical model of the frictional heat generation, heat transfer, and transient temperature distribution; experiments were performed for different speeds and loads to validate the model.…”

Section: Introductionmentioning

confidence: 99%

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Thermal Characteristic Analysis and Experimental Study of a Spindle-Bearing System

Tan

2016

Entropy

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Abstract:In this paper, a thermo-mechanical coupling analysis model of the spindle-bearing system based on Hertz's contact theory and a point contact non-Newtonian thermal elastohydrodynamic lubrication (EHL) theory are developed. In this model, the effect of preload, centrifugal force, the gyroscopic moment, and the lubrication state of the spindle-bearing system are considered. According to the heat transfer theory, the mathematical model for the temperature field of the spindle system is developed and the effect of the spindle cooling system on the spindle temperature distribution is analyzed. The theoretical simulations and the experimental results indicate that the bearing preload has great effect on the frictional heat generation; the cooling fluid has great effect on the heat balance of the spindle system. If a steady-state heat balance between the friction heat generation and the cooling system cannot be reached, thermally-induced preload will lead to a further increase of the frictional heat generation and then cause the thermal failure of the spindle.

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Section: Numerical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal Characteristic Analysis and Experimental Study of a Spindle-Bearing System

Tan

2016

Entropy

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“…Many advanced instruments and equipments are employed to investigate temperature rises and thermal deformations of machine tools [2][3][4][5][6]. In this foundation, research also has considered many ways of deriving thermal models to predict the thermal behaviour of machine tools, such as the bond graph, the finite difference method, and the finite element method (FEM) [7][8][9][10][11][12][13][14][15]. For example, Sun-Min Kim et al use the bond graph to describe the thermo-elastic behaviour of a spindle system.…”

Section: Background and Motivationmentioning

confidence: 99%

“…The above two methods can give an accurate description for the thermal effects of the objects with a relative simple structure. However, for the complicated parts and even the whole machine tool, FEM has been widely used to establish a thermal model [9][10][11][12][13][14][15]. It should be mentioned that Jedrzejewski and Modorzycki [15] proposed a comprehensive finite element model for the whole vertical machining centre early in 1992, which was based on the assumption that the amount of energy dissipated in particular components of the kinematic system is a function of the operational conditions.…”

Section: Background and Motivationmentioning

confidence: 99%

Thermal design of the vertical machining centre headstock by the forced cooling method

Jiang

2011

Proceedings of the Institution of Mechanical Engineers, Part C:

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The headstock thermal drift is a major source of the machining error for a vertical machining centre. However, the research so far reported has been unable to provide a satisfactory method to eliminate the spindle axis dip angle resulting from the thermal drift. In this article, a thermal design is carried out for the vertical machining centre headstock by introducing a dual cooling system, utilizing forced water cooling subsystem and a forced air cooling one. An integrated thermal model of the vertical machining centre headstock has been established by aid of the finite element method, and the appropriate structural parameters of the dual cooling system have been analysed. The theoretical results were verified by an experiment in which the perpendicularity between worktable surface and the spindle axis resulting from the thermal displacement is measured. The results indicate that the thermal behaviour of the vertical machining centre headstock can be improved using the dual cooling method.

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“…Xu Min & Jiang Shuyun created a model including the thermal contact resistance at solid joints based on fractal theory. The change of the bearing heat with temperature increasing was calculated [2]. Sun-Min Kim, Sun-Kyu Lee made prediction of thermo-elastic behavior in a spindle-bearing system that includes the time-varying heat source, contact conductivity and preload [3].…”

Section: Introductionmentioning

confidence: 99%

Towards tailor made robot co workers based on a plug&produce framework

Barattini

Morand

Almajai

et al. 2013

2013 IEEE International Symposium on Assembly and Manufacturing (ISAM)

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The prediction of the temperature distribution and thermal deformation for motorized spindle dependent on time is critical in its design process .The thermo-structural model of a grinding motorized spindle is developed with accurate thermal boundary conditions of the spindle-bearing system based on experimental data and numerical calculation. The following thermal boundary conditions are improved: the heat transfer coefficient of natural convection between spindle surface and ambient air through heat flux measurement, the heat transfer coefficient of forced convection of cooling water by the simulation analysis. In addition, a method of heat distribution applied to the bearing model is proposed. The thermo-structural model with structural deformation constraints is validated experimentally based on the transient temperature of typical regions, the axial thermal deformation of the shaft and the thermal equilibrium time.

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An improved thermal model for machine tool bearings

Cited by 132 publications

References 10 publications

Thermal Characteristic Analysis and Experimental Study of a Spindle-Bearing System

Thermal Characteristic Analysis and Experimental Study of a Spindle-Bearing System

Thermal design of the vertical machining centre headstock by the forced cooling method

Towards tailor made robot co workers based on a plug&produce framework

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An improved thermal model for machine tool bearings

Cited by 132 publications

References 10 publications

Thermal Characteristic Analysis and Experimental Study of a Spindle-Bearing System

Thermal Characteristic Analysis and Experimental Study of a Spindle-Bearing System

Thermal design of the vertical machining centre headstock by the forced cooling method

Towards tailor made robot co workers based on a plug&amp;produce framework

Contact Info

Product

Resources

About

Towards tailor made robot co workers based on a plug&produce framework