|
CSME 2021/06
Volume 42 No.3
:
285-294
|
|
Thermal Contact Resistance Model of Annular Contact Surfaces with Various Tolerance Fits for Spindle-Bearing Joint
Cui Fanga, Cong-Bin Yangb, Qiu-shi Huc, Yong-Sheng Zhaob and ZhiFeng Liub
aPh.D. student, Institute of Advanced Manufacturing and Intelligent Technology，Beijing University of Technology, Beijing 100124, China.
bProfessor, Institute of Advanced Manufacturing and Intelligent Technology，Beijing University of Technology, Beijing 100124,China.
cLecturer, School of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China.
|
Abstract:
The thermal contact resistance (TCR) of a spindle bearing joint is crucial in the analysis of thermal characteristics of high speed motorized spindle, which could severely affect the machining accuracy of a machine tool. In this research, firstly, an experimental set-up was designed and the one-dimensional steady measurement method was introduced to obtain the TCR of an annular contact surface with various tolerance fits. Secondly, a TCR model of an annular contact surface for the spindle bearing joint with various tolerance fits was proposed. The TCR model was obtained by the constrained thermal resistance, the bulk thermal resistance and the air thermal resistance. Finally, the clearance, transition and interference fits were considered as three typical cases. The TCR of the interference fit could be calculated based on the proposed model and the contact load derived from the contact formula. However, this method was not suitable for the cases of clearance and transition fits. In this case, a hybrid method was utilized to determine the corresponding equivalent contact load. The results demonstrated that the proposed model could be utilized to predict the TCR of annular surfaces with various tolerance fits.
|
|
Keywords: spindle-bearing joint, thermal contact resistance, tolerance fit, contact load, fractal theory.
|
Download PDF
|
|
*Corresponding author; e-mail:
|
©
2021
CSME , ISSN 0257-9731
|