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A new dynamic balancing method of spindle based on the identification energy transfer coefficient

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Abstract

A new vector matching balance method (VMBM) based on the identification of energy transfer coefficient of spindle rotor system (ETCSRS) is proposed in this paper. This method only needs to extract the original vibration signal of the spindle to compute the spindle rotor system unbalanced vector, and the calculation accuracy depends on the identification precision of ETCSRS. The initial parameters of bearings were calculated by applying Newton-Raphson algorithm based on the quasi-static mechanics analysis of rolling bearings. Through establishing the FEA model of spindle, the structural parameters of the rotor shaft system are obtained and modified by modal correction method. First, the principle of VMBM is verified on a Bentley rotor test bench at different rotating speeds. Second, the verification experiment of VMBM on a high-speed spindle is carried out. Furthermore, the VMBM has a better performance than the influence coefficient method (ICM). The method proposed in this paper is very suitable for on-line dynamic balancing, since it greatly improves the balance efficiency.

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Abbreviations

M:

Mass matrix

C:

Damping matrix

G:

Gyroscopic matrix

S :

Displacement vector of the system

F:

Generalized force

u:

Unbalanced vector

r:

Unbalanced response

φ :

Lag angle

β :

Weighted influence coefficient matrix

Q:

Balance vector

A:

Vibration response vector

Fa :

Axial load

Fr :

Radial load

My :

The external bending moment

δa :

Axial displacement

δr :

Radial displacement

θ:

Relative dip angle

α:

The initial contact angle

Ri :

Radius of the distribution circle

δij :

Contact deformations of the balls

δej :

Contact deformations of the rings

λj :

Control parameters of the grooves

Kr :

Radial stiffness

δ:

Bearing inner race displacement

M1 :

The mass of the finite element model

K1 :

The stiffness of the finite element model

C1 :

The damping of the finite element model

M2 :

The mass of the experimental modal test

K2 :

The stiffness of the experimental modal test

C2 :

The damping of the experimental modal test

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Acknowledgements

This research is supported by the National Science and Technology Major Project of China (Grant Number 2015Z X04005001 and 2017ZX04013001).

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Correspondence to Xuesong Mei.

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The authors declare that there is no conflict of interests regarding the publication of this paper.

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Recommended by Associate Editor Hyeong-Joon Ahn

Xialun Yun is a Doctor of Xi’an Jiaotong University. His research mainly includes high speed spindle machining technology and high speed spindle on — line dynamic balance technology. In recent years, he has published 5 papers and apply for more than 20 invention patents.

Xuesong Mei is a Professor of Xi’an Jiao Tong University and the Head of Shaanxi Key Laboratory of Intelligent Robots. His research interests include finishing machining, CNC technology and laser manufacturing technology. In recent years, he has edited 2 monographs in the field of machine tool manufacturing and published more than 200 papers and authorized more than 40 invention patents.

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Yun, X., Mei, X., Jiang, G. et al. A new dynamic balancing method of spindle based on the identification energy transfer coefficient. J Mech Sci Technol 33, 4595–4604 (2019). https://doi.org/10.1007/s12206-019-0607-4

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  • DOI: https://doi.org/10.1007/s12206-019-0607-4

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