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

Wu, Li; Tan, Qing

doi:10.3390/e18070271

Cited by 20 publications

(9 citation statements)

References 34 publications

(50 reference statements)

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“…Ge and Ding [5] utilized Carbon Fiber Reinforced Plastic (CFRP) with the performance of the thermal contraction to reduced thermal deformations of spindle housing. Li and Qingchang [6] indicated that the factors affecting the thermal error of the spindle included the oil-film thickness and the preload and lubrication of the bearing. By using a cooling system, the radial temperature difference of the spindle can be controlled within 30 • C even during operation at high rotational speeds.…”

Section: Temperature Difference T Imentioning

confidence: 99%

Enhancement of Machining Accuracy Utilizing Varied Cooling Oil Volume for Machine Tool Spindle

Luo

Hong

et al. 2020

IEEE Access

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In this study, varied cooling oil volume (VOV) control was developed for the oil coolant of a machine tool. This allows adjustment of the oil circulation flow rate in terms of the machining loads and rotational speeds of the spindle to remove the generated heat effectively from the spindle. A mathematical model of the cooling oil flow rate in terms of the rotating speed and torque of the spindle for VOV method is developed. From the thermal deformation experiments with the VOV method, the thermal deformations in both the Y-axis and Z-axis can be greatly reduced, by 70.1 % and 73.5 %, respectively, in variable rotational speed operation with a short operational period (10 minutes). Moreover, the VOV method was applied to shorten the required warm-up time of the spindle. The required warm-up time of the spindle can be shortened by 50 %, while the three axes of the spindle attain stable thermal conditions. In practical machining experiments, the machining accuracy with the VOV method can be greatly enhanced by 34 % to 62 % in comparison with the current case of constant cooling oil volume (COV). The VOV control system in the machine tool spindle can effectively reduce the thermal deformation and shorten the required warm-up time. In addition, the machining accuracy can be greatly enhanced. INDEX TERMS Thermal deformation, thermal suppression, varied cooling oil volume, machining accuracy.

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Section: Temperature Difference T Imentioning

confidence: 99%

Enhancement of Machining Accuracy Utilizing Varied Cooling Oil Volume for Machine Tool Spindle

Luo

Hong

et al. 2020

IEEE Access

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“…Wu and Tan [10] have developed a thermo-mechanical coupling analysis model of the spindle-bearing system based on the Hertz's contact theory and the point contact non-Newtonian thermal elastohydrodynamic lubrication (EHL) theory.…”

Section: Overview Of the Previous Workmentioning

confidence: 99%

A Thermal Analysis of the Threaded Spindle Bearing Assembly in Numerically Controlled Machine Tools

Krstić

Milčić

2018

FU Mech Eng

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A threaded gear in machine tools is a mechanical actuator that converts rotary motion into linear one of the machine axis using a recirculating ball-nut. It provides positioning accuracy, uniform motion, silent operation, reduced wear and an increased service life. The bearing assembly of the threaded spindles should provide load transfer (cutting forces and friction forces) while maintaining high guiding accuracy. Due to a high number of the threaded spindle revolutions and the presence of tension in the bearing and a high axial force originating from the cutting and friction forces, the increased heat load due to friction in the bearings is normally expected. For this reason, this paper presents a thermal analysis of the bearing assembly of the threaded spindle which is realized via an axial ball bearing with angular contact of the ZKLN type, produced by the German manufacturer Schaeffler (INA); in other words, a numerical thermal analysis has been performed.

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“…The distribution of temperature is the foundation of thermal-mechanical coupling model. There are usually two foundation methods to solve the temperature field, the thermal grid method [11][12][13] and the finite element method [14][15][16].…”

Section: Introductionmentioning

confidence: 99%

An Improved Thermal Performance Modeling for High-speed Spindle of Machine Tool Based on Thermal Contact Resistance Analysis

Fan

Cheng

et al. 2021

Preprint

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The distribution of the temperature field has a great influence on structural performance, thermal deformation, thermal error compensation. To improve the prediction accuracy of the temperature distribution of the spindle system, a comprehensive model considering the contact thermal resistance (TCR) of the interfaces was established to analyze the thermal performance of high-speed spindle system in the present work. An elastoplastic contact model was used to calculate the contacting areas and loads of interfaces, which were employed to establish the contact thermal resistance model of the main interfaces of spindle, such as bearing rings and tool holders. Basing on the TCR parameters, a Finite Element Analysis (FEA) model was proposed to analyze the temperature distribution of the spindle system. And a temperature test experiment was set up to verify the accuracy of the FEA model. The results show that the relative error of representative test points was all less than 5%, which means the established model can appropriately reflect the temperature field distribution of the spindle.

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

Cited by 20 publications

References 34 publications

Enhancement of Machining Accuracy Utilizing Varied Cooling Oil Volume for Machine Tool Spindle

Enhancement of Machining Accuracy Utilizing Varied Cooling Oil Volume for Machine Tool Spindle

A Thermal Analysis of the Threaded Spindle Bearing Assembly in Numerically Controlled Machine Tools

An Improved Thermal Performance Modeling for High-speed Spindle of Machine Tool Based on Thermal Contact Resistance Analysis

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