A novel dynamic modeling method for aerostatic spindle based on pressure distribution

Chen, Wanqun; Liang, Yingchun; Sun, Yazhou; Bai, Qingshun; An, Chenhui

doi:10.1177/1077546314523030

Cited by 17 publications

(19 citation statements)

References 13 publications

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“…Aerostatic spindles are widely applied in precision and ultra-precision machine tools because of advantages such as lower heat generation, lower wear and friction, lower noise levels, less contamination, and higher precision. Chen (Chen et al 2015) studies a novel dynamic modeling method for aerostatic spindle based on pressure distribution as shown in Fig. 7, which is more efficient and reliable than traditional modeling methods for the precision machines.…”

Section: Geometric Accuracymentioning

confidence: 99%

“…For example, when turning a thread on a lathe, each time the spindle rotates, the Fig. 7 Structure and outline of the dynamic modeling approach of the aerostatic spindle (Chen et al 2015) movement of the tool post should be equal to the lead of the thread. However, in fact, due to errors in gears, screws, and bearings in the transmission chain between the main shaft and the tool post, there is an error between the actual travel distance of the tool post and the required travel distance.…”

Section: Static Transmission Accuracy and Positioning Accuracymentioning

confidence: 99%

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Electric-Magnetic-Mechanical Coupling in Precision Machines

Ren¹

2020

Precision Manufacturing

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In this chapter, the electric-magnetic-mechanical coupling methods and related research progress of precision machine tools are discussed. The electromagnetic machine complex of guideway and spindle and the influence of electromagnetic machine parameters on precision machining equipment are discussed respectively based on the key functional parts of precision machine tools. Then, the electromagnetic coupling, motor coupling, and magnetic machine coupling are analyzed respectively to study the coupling of three technical directions, and the method involves the finite element analysis method and electromagnetic machine test method of electromagnetic machine. Based on a specific machining process example, this chapter discusses the theoretical analysis of the influence of three parameters of electromagnetic machine on precision machining machine tools. Finally, the summary analysis of this chapter needs to study the systematic

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Section: Geometric Accuracymentioning

confidence: 99%

Section: Static Transmission Accuracy and Positioning Accuracymentioning

confidence: 99%

Electric-Magnetic-Mechanical Coupling in Precision Machines

Ren¹

2020

Precision Manufacturing

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“…According to Maxwell stress tensor method, the radial and the tangential magnetic traction acting on the rotor can be expressed as equations (1) and (2). 16,17 Using Cartesian coordinates, the corresponding traction can be expressed as equations (3) and (4)…”

Section: Calculation Of the Rmfmentioning

confidence: 99%

“…Zhang et al 2 built up a dynamic spindle model and investigated its dynamic responses which contained translational motions and tilting motions. Chen et al 3 and Liang et al 4 designed and optimized the structure of an ultra-precision spindle for potassium dihydrogen phosphate (KDP) crystal machining. Chen et al 5,6 analyzed the frequency errors of the ultra-precision spindle, pointing out that the main error was the synchronization error, and the low frequency synchronization errors were mainly caused by the unbalance vibration of the spindle system.…”

Section: Introductionmentioning

confidence: 99%

Effect of motor rotor eccentricity on aerostatic spindle vibration in machining processes

Sun

Chen

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part C:

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In ultra-precision machining field, the air motorized spindle which is composed of a motor and an air bearing, plays a major role. In air motorized spindle, the motor eccentricity between the stator and the rotor is inevitably introduced during the manufacturing process, which directly affects the machining results of workpiece surface, and this phenomenon is particularly unwanted in machining. However, little attention has been paid to the motor eccentricity of air motorized spindle. In this paper, a new integrated electromechanical coupling method for estimating unbalanced force in air motorized spindle is presented, and the effects of motor rotor eccentricity on surface topography in ultra-precision processes are analyzed. An electromagnetic-mechanical method is used to study the coupling effects between the motor rotor and the aerostatic spindle. Meanwhile, the motor rotor and the aerostatic spindle are analyzed as a whole. In order to clearly describe the electromagnetic–mechanical method, the ultra-precision spindle for potassium dihydrogen phosphate crystal machining tool is selected as the research object, and the model of air motorized spindle and motor rotor eccentricity are presented. Besides, in order to assess the impact of the radial magnetic force caused by motor rotor eccentricity on the spindle performance, a range of rotor eccentricities is calculated. Additionally, the influence of the motor rotor eccentricity on the dynamic response of spindle is further analyzed. It is found that motor rotor eccentricity has a significant influence on the spindle vibration, which dramatically reduces the processing quality. Finally, the machining experiments are carried out, and the flatness errors of the workpiece caused by the motor rotor eccentricity are obtained by the wavelet method. The experimental results are consistent with the analysis results, which verifies the reliability of this method. This study is quite meaningful for deeply understanding the influence of motor rotor eccentricity on the machined surface.

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“…3,4 Considering the importance of the stiffness of air bearing, the research on air bearing stiffness becomes a major part of research on its static characteristics. [5][6][7] The main methods used to study the stiffness of air bearing in the bearing design stage are the numerical computation method and the finite element simulation method. The basic idea of the numerical computation method is the numerical analysis and algorithm improvement based on fluid control equations to find approximate solution of internal fluid field in the bearing.…”

Section: Introductionmentioning

confidence: 99%

Optimal design of an aerostatic spindle based on fluid–structure interaction method and its verification

Chen

et al. 2015

Proceedings of the Institution of Mechanical Engineers, Part J:

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The aerostatic spindle is made up of the structure components and the fluid film. The interaction between them has important influence on the comprehensive performance of the spindle. This paper presents a new design method of aerostatic spindle based on the fluid–structure interaction method. The changes of bearing clearance caused by the structure deformation under high-pressure fluid film are considered, and the static performances of the bearing are obtained. In order to improve the performance of the spindle, the structural parameters of the bearing are optimized. The proposed design method is implemented through a self-developed aerostatic spindle.

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A novel dynamic modeling method for aerostatic spindle based on pressure distribution

Cited by 17 publications

References 13 publications

Electric-Magnetic-Mechanical Coupling in Precision Machines

Electric-Magnetic-Mechanical Coupling in Precision Machines

Effect of motor rotor eccentricity on aerostatic spindle vibration in machining processes

Optimal design of an aerostatic spindle based on fluid–structure interaction method and its verification

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