Kinematic Error Transfer and Integrated Precision Modeling of the Meta-action Chain for CNC Machine Tools

doi:10.3901/JME.2023.23.211

Abstract

Abstract: Aiming at the lack of research on transmission mechanism of kinematic errors in the transmission chains and the coupling relationship of precision between transmission chains of CNC machine tool, a methodology for kinematic error transfer and integrated precision modeling of CNC machine tools is proposed based on meta-action. Firstly, the "function-motion-action" (FMA) decomposition of the machine tool is carried out to obtain the meta-action and the meta-action chain. Secondly, starting from the output of the meta-action unit, the kinematic transfer mechanism between the meta-actions of different layers is analyzed, and a kinematic error transfer model of the single meta-action chain is established. Considering the coupling influence of the same-layer meta-action between adjacent meta-action chains, an integrated precision model of the single meta-action chain can be established based on probability distribution and black-box model. Finally, the rationality and effectiveness of the method are illustrated by an example of the indexing motion of the turntable of the CNC machine tool.

Key words: CNC machine tool, meta-action, kinematic error, error transfer, integrated precision

CLC Number:

TG659

RAN Yan, TIAN Ke, DOU Yifan, JIN Chuanxi, ZHANG Genbao, MU Zongyi. Kinematic Error Transfer and Integrated Precision Modeling of the Meta-action Chain for CNC Machine Tools[J]. Journal of Mechanical Engineering, 2023, 59(23): 211-220.

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URL: http://www.cjmenet.com.cn/EN/10.3901/JME.2023.23.211

http://www.cjmenet.com.cn/EN/Y2023/V59/I23/211

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