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Analysis of contact characteristics of ball screws under the combined loads considering non-uniform load distribution

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Abstract

An analysis model of the contact characteristics of the double-nut preloaded ball screw which can consider the combined action of the axial load and the overturning moment is established, the model can consider non-uniform load distribution, and the validity of the model is verified by experiments. Based on this model, the influence of the combined action of axial load and overturning moment on the average value and distribution fluctuation value of the contact angle of the ball screw, the number of unloaded balls, the distribution fluctuation value of the contact load, and the static contact stiffness and other contact parameters are systematically analyzed, and get the following conclusions: The contact parameters of the ball screw are mainly affected by the axial load and the contact state between the ball and the raceway. The gradually increasing axial load basically reduces the influence of the overturning moment on the contact parameters of the ball screw. There is a critical value of the load in the axial direction within the range of the action value of the preload load. Only when the critical value is above the critical value, the contact parameters will change regularly with the changes in the axial stiffness and overturning moment. However, different critical values for the regular variation of contact parameters with axial load and overturning moment vary.

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Abbreviations

α p :

Contact angle between ball and raceway after preload

δ :

Contact deformation between ball and raceway

a :

Contact angle between ball and raceway contact surface

A :

Distance between the center of curvature of the screw raceway and nut raceway after deformation

θ :

Ball phase angle

α :

Helix angle

r 0 :

Nominal radius

Q :

Normal contact force between ball and raceway contact surface

F :

External load

K :

Static contact stiffness

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Acknowledgments

This work was supported by Research Program supported by the Department of China Postdoctoral Science Foundation (Postdoctoral Science Foundation Project), China.

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Authors and Affiliations

  1. School of Aerospace and Mechanical Engineering, Changzhou Institute of Technology, Changzhou, 213002, China

    Yongjiang Chen

  2. Institute of Advanced Manufacturing Technology, Chinese Academy of Sciences, Changzhou, 213164, China

    Jianghai Zhao, Chuangfan Yuan & Jingkai Sun

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  1. Yongjiang Chen
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  2. Jianghai Zhao
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  3. Chuangfan Yuan
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  4. Jingkai Sun
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Corresponding author

Correspondence to Yongjiang Chen.

Additional information

Yongjiang Chen is a post doctor of the Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei, China. He received his Ph.D. in Mechanical Engineering from Southeast University. His research interests include Mechanical Statics and Dynamics Analysis, performance parameter measurement and processing.

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Chen, Y., Zhao, J., Yuan, C. et al. Analysis of contact characteristics of ball screws under the combined loads considering non-uniform load distribution. J Mech Sci Technol 37, 1613–1621 (2023). https://doi.org/10.1007/s12206-023-0304-1

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  • DOI: https://doi.org/10.1007/s12206-023-0304-1

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