A convective heat transfer coefficient algorithm for thermal analysis of machine tools considering a temperature change

Mao, Xiaobo; Mao, Kuanmin; Wang, Fengyun; Yan, Bo; Lei, Sheng

doi:10.1007/s00170-018-2605-6

Cited by 10 publications

(2 citation statements)

References 22 publications

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“…Figure 4 depicts the experimental device. Concerning current studies, the temperature measurement locations that have a substantial impact on the total thermal field of the feed system were chosen [22][23][24]. The temperatures of the front bearing (T1), the rear bearing (T2), the nut flange (T3), the screw shaft (T4), the worktable (T5), the environment (T6), and the axial elongation of the screw shaft (D) were measured separately.…”

Section: Experimental Verification Device and Schemementioning

confidence: 99%

Thermal Model and Thermal Analysis of the Dual Drive Sliding Feed System

Li,

Liu,

Feng

et al. 2023

Machines

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The dual drive sliding feed system can obtain a uniform and stable resolution at extremely low speeds and significantly reduce the system’s nonlinear friction. However, the numerous thermal sources within the system and the multipoint sliding contact during transmission result in a significant temperature rise, leading to considerable thermal deformation and errors. Moreover, the responsive mechanism of the thermal characteristics needs to be clarified. Therefore, firstly, a frictional torque model of the engagement of the screw and nut is established, and the heat generation, heat transfer, and thermal contact resistance (TCR) are solved. Then, based on the solution, a finite element thermal simulation model of the dual drive sliding feed system is established, and experiments are performed for validation. The results show that the error in temperature at the measuring point is less than 2.1 °C, and the axial thermal elongation of the screw is less than 6.2 µm. Finally, the thermal characteristics of the feeding system under various operating conditions are analyzed. The results show that the established thermal simulated model can effectively describe the dynamic thermal characteristics of the dual drive sliding feed system during operation. The effects of the rotational speed and ambient temperature on the dynamic thermal characteristics of the dual drive sliding feed system are investigated separately. The temperature increase in each part of the screw during the operation is characterized.

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Section: Experimental Verification Device and Schemementioning

confidence: 99%

Thermal Model and Thermal Analysis of the Dual Drive Sliding Feed System

Li,

Liu,

Feng

et al. 2023

Machines

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show abstract

“…On one hand, some scholars investigated the modeling method based on simulation technology. On the basis of finite element thermal analysis, Mao et al [3] proposed an iterative finite element thermal analysis algorithm combining experimental data to calculate the convective heat transfer coefficient (CHTC) of precision ball screw system. Oyanguren et al [4] presented a numerical modelling strategy to predict the preload variation due to temperature increase using a thermo-mechanical 3D finite element method (FEM)-based model for double nut-ball screw drives.…”

Section: Introductionmentioning

confidence: 99%

Active coolant control onto thermal behaviors of precision ball screw unit

Zhang

et al. 2021

Int J Adv Manuf Technol

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Being a critical factor affecting the motion accuracy of precision machine tools, structural thermal elongation of precision ball screw unit is generally caused by the comprehensive influence from heat generations of screw-nut pair / bearings and time-varying ambient temperature.To resist 2 thermal disturbances above to guarantee precisely the original length of screw shaft, an active coolant control strategy is proposed in this paper. This strategy is based on an empirical model: For the slender and long tubular structure of screw shaft, the screw shaft temperature is approximately equal to its recirculating coolant temperature. The reason is that the intensive forced coolant convection is capable of eliminating screw shaft temperature rises caused by friction heat generations and ambient air convections. Based on this premise, screw coolant temperature can be consistently controlled by an active strategy, further to correct the thermal elongation of screw shaft.It can be experimentally verified that the thermal variations of machine positioning accuracy caused by the active coolant control strategy are not more than 10μm, which are lower than traditional strategy. Besides, based on detected structural temperatures of precision ball screw unit, the empirical model above is further proved to be reliable by FE simulation method.

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Prediction of temperature field in the whole process of instantaneous and steady state of high-speed motorized spindle

Lixiu,

Ruwei

2024

Int J Adv Manuf Technol

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A convective heat transfer coefficient algorithm for thermal analysis of machine tools considering a temperature change

Cited by 10 publications

References 22 publications

Thermal Model and Thermal Analysis of the Dual Drive Sliding Feed System

Thermal Model and Thermal Analysis of the Dual Drive Sliding Feed System

Active coolant control onto thermal behaviors of precision ball screw unit

Prediction of temperature field in the whole process of instantaneous and steady state of high-speed motorized spindle

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