Relationship between dynamic characteristics of air film of aerostatic spindle and mid-frequency of surface topography

doi:10.1007/s40436-022-00391-4

Advances in Manufacturing ›› 2022, Vol. 10 ›› Issue (3): 428-442.doi: 10.1007/s40436-022-00391-4

• ARTICLES • 上一篇

Relationship between dynamic characteristics of air film of aerostatic spindle and mid-frequency of surface topography

Dong-Ju Chen¹, Shu-Pei Li¹, Xuan Zhang¹, Jin-Wei Fan¹

Mechanical Industry Key Laboratory of Heavy Machine Tool Digital Design and Testing, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, People's Republic of China

收稿日期:2021-08-03 修回日期:2021-12-06 发布日期:2022-09-08
通讯作者: Dong-Ju Chen E-mail:djchen@bjut.edu.cn
基金资助:
This study was funded by the National Natural Science Foundation of China (Grant Nos. 51875005 and 51475010), and the National Science and Technology Major Project of China (Grant No. 2016ZX04003001).

Relationship between dynamic characteristics of air film of aerostatic spindle and mid-frequency of surface topography

Dong-Ju Chen¹, Shu-Pei Li¹, Xuan Zhang¹, Jin-Wei Fan¹

Mechanical Industry Key Laboratory of Heavy Machine Tool Digital Design and Testing, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing 100124, People's Republic of China

Received:2021-08-03 Revised:2021-12-06 Published:2022-09-08
Supported by:
This study was funded by the National Natural Science Foundation of China (Grant Nos. 51875005 and 51475010), and the National Science and Technology Major Project of China (Grant No. 2016ZX04003001).

摘要/Abstract

摘要： The dynamic characteristics of the gas film of an aerostatic spindle primary affect workpiece waviness in ultra-precision machining. To improve the machining accuracy of the machine tool and provide a firm theoretical basis for the design of an aerostatic spindle, a simulation model combining transient computational fluid dynamics (CFD) analysis and transient dynamic analysis is established in this study to investigate the dynamic characteristics of the spindle under unstable operating conditions. Based on a large eddy simulation, a three-dimensional flow model of an air film in an aerostatic spindle is established. The simulation results show that the gas flow in the throttle chamber is turbulent, and that complex vortices are formed. Using dynamic grid modeling technology, a CFD numerical model for the unsteady calculation of the spindle is established, and the dynamic characteristics of the gas film are obtained. A transient dynamic simulation model of an aerostatic spindle is established, and the effect of the nonlinear dynamic characteristics of the gas film on the spindle displacement response is investigated. Subsequently, a surface morphology prediction model is established. Results show that film fluctuation significantly affects the dynamic characteristics of the spindle and subsequently affects the generation of surface ripples on the workpiece.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-022-00391-4

关键词: Dynamic characteristics, Aerostatic spindle, Surface formation, Ultra-precision flying cutting

Abstract: The dynamic characteristics of the gas film of an aerostatic spindle primary affect workpiece waviness in ultra-precision machining. To improve the machining accuracy of the machine tool and provide a firm theoretical basis for the design of an aerostatic spindle, a simulation model combining transient computational fluid dynamics (CFD) analysis and transient dynamic analysis is established in this study to investigate the dynamic characteristics of the spindle under unstable operating conditions. Based on a large eddy simulation, a three-dimensional flow model of an air film in an aerostatic spindle is established. The simulation results show that the gas flow in the throttle chamber is turbulent, and that complex vortices are formed. Using dynamic grid modeling technology, a CFD numerical model for the unsteady calculation of the spindle is established, and the dynamic characteristics of the gas film are obtained. A transient dynamic simulation model of an aerostatic spindle is established, and the effect of the nonlinear dynamic characteristics of the gas film on the spindle displacement response is investigated. Subsequently, a surface morphology prediction model is established. Results show that film fluctuation significantly affects the dynamic characteristics of the spindle and subsequently affects the generation of surface ripples on the workpiece.

The full text can be downloaded at https://link.springer.com/article/10.1007/s40436-022-00391-4

Key words: Dynamic characteristics, Aerostatic spindle, Surface formation, Ultra-precision flying cutting

Dong-Ju Chen, Shu-Pei Li, Xuan Zhang, Jin-Wei Fan. Relationship between dynamic characteristics of air film of aerostatic spindle and mid-frequency of surface topography[J]. Advances in Manufacturing, 2022, 10(3): 428-442.

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Relationship between dynamic characteristics of air film of aerostatic spindle and mid-frequency of surface topography

Relationship between dynamic characteristics of air film of aerostatic spindle and mid-frequency of surface topography

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