High-speed precise machine tools spindle units improving

Jędrzejewski, J.; Kowal, Z.; Kwaśny, W.; Modrzycki, W.

doi:10.1016/j.jmatprotec.2005.02.149

Cited by 43 publications

(20 citation statements)

References 7 publications

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“…[105] The most modern spindle assembly is the motorspindle, which is capable of very high rotational speeds, but at limited torque levels [1]. A typical example of a general model of the thermal behaviour of the high-speed headstock of a machining centre with a motorspindle is the hybrid model shown in figure 16 [106].…”

Section: Modelling and Computing Thermal Errors In Spindles And Rotatmentioning

confidence: 99%

Thermal issues in machine tools

et al. 2012

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Section: Modelling and Computing Thermal Errors In Spindles And Rotatmentioning

confidence: 99%

Thermal issues in machine tools

et al. 2012

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“…The research of non-linear thermal effects on high speed spindles via FDM was performed by Than and Huang [3]. Jedrzejewski et al [4,5] presented a hybrid model of high speed machining center which consisted of a headstock modeled by FEM and using tetrahedral elements, and axisymmetric spindle with bearings modeled via FDM using ring elements. Li and Shin [6] depicted an integrated thermodynamic model based on FEM, with the relation between the increase in temperature and the stationary change in bearing stiffness by using 2-D axisymmetric elements.…”

Section: Introductionmentioning

confidence: 99%

“…where a, b are the elliptic contact axes as defined in relation(5).Thermal contact resistance for each ball position in the function of preload is shown infig. 5.In fig.…”

mentioning

confidence: 99%

A study of thermal behavior of the machine tool spindle

et al. 2019

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The performances of high-speed machine tools depend not only on the speed, power, torque, dynamic and static stiffness, but also on the thermal behavior of the spindle. These parameters directly affect the productivity and quality of machining operations. This paper presents a 3-D finite element thermal model, which was based on the thermo mechanical bearing model and the numerical model of the spindle. Based on thermo mechanical analysis of bearings with angular contact, generated heat and thermal contact resistance are determined for each position of the ball. To provide the most accurate analysis possible in determining thermal contact resistance , bearings are divided into several zones based on the geometry of their cross-section. The aforementioned constraints have been applied to the 3-D FEM model which allowed for establishing temperature field distribution, and spindle thermal balance. In order to prove the efficacy of the proposed model, experimental measurements of spindle and bearing temperatures were done by using thermocouples and thermal imager.

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“…Such thermal boundary conditions as the processing conditions of the heating and cooling environments are loaded into the model to simulate the temperature distribution of the motorized spindle. Jedrzejewski et al [13][14][15][16][17] researched finite element thermal modeling of NC machine tools and created a hybrid model of a high-speed machining center spindle box using finite element modeling. This method was used to model the components of the symmetrical axis.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Prediction Model of the Temperature Field of a Motorized Spindle

Zhang

Chaoqun

et al. 2017

Applied Sciences

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Abstract:The thermal characteristics of a motorized spindle are the main determinants of its performance, and influence the machining accuracy of computer numerical control machine tools. It is important to accurately predict the thermal field of a motorized spindle during its operation to improve its thermal characteristics. This paper proposes a model to predict the temperature field of a high-speed and high-precision motorized spindle under different working conditions using a finite element model and test data. The finite element model considers the influence of the parameters of the cooling system and the lubrication system, and that of environmental conditions on the coefficient of heat transfer based on test data for the surface temperature of the motorized spindle. A genetic algorithm is used to optimize the coefficient of heat transfer of the spindle, and its temperature field is predicted using a three-dimensional model that employs this optimal coefficient. A prediction model of the 170MD30 temperature field of the motorized spindle is created and simulation data for the temperature field are compared with the test data. The results show that when the speed of the spindle is 10,000 rpm, the relative mean prediction error is 1.5%, and when its speed is 15,000 rpm, the prediction error is 3.6%. Therefore, the proposed prediction model can predict the temperature field of the motorized spindle with high accuracy.

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High-speed precise machine tools spindle units improving

Cited by 43 publications

References 7 publications

Thermal issues in machine tools

Thermal issues in machine tools

A study of thermal behavior of the machine tool spindle

Hybrid Prediction Model of the Temperature Field of a Motorized Spindle

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