Thermal Error Modeling of Machining Center Spindle Based on Physical Modeling Method

doi:10.12068/j.issn.1005-3026.2020.04.013

Abstract

Abstract: Aiming at the problem that the thermal error of spindles has a serious impact on the accuracy of machine tools， a thermal error prediction model based on heat transfer theory and thermal deformation mechanism was proposed. Firstly， the real-time temperature field model of the spindle system was derived from an analysis of the heat transfer mechanism. Then， the mechanism of the thermal deformation of the main shaft was analyzed according to the size of the machine tool， and the relationship between the temperature field and the thermal error was obtained with the physical modeling method. Finally， the thermal error simulation and experimental verification of the spindle were carried out on two vertical machining centers of the same type. The results showed that the average prediction accuracy of the spindle thermal error model reaches 95.0%， which proves that the model has high precision and robustness.

Key words: spindle, thermal errors, thermal deformations, physical modeling, robustness

CLC Number:

TH161

KANG Cheng-ming， ZHAO Chun-yu， FU Li-xin. Thermal Error Modeling of Machining Center Spindle Based on Physical Modeling Method[J]. Journal of Northeastern University Natural Science, 2020, 41(4): 528-533.

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