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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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