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Friction characteristics of moving joint surface from the micro and macro scale

Lixin Hai (Key Lab. of NC Machine Tools and Integrated Manufacturing Equipment of the Education Ministry and Key Lab. of Manufacturing Equipment of Shaanxi Province, Xi’an University of Technology, Xian, China)
Feng Gao (Key Lab. of NC Machine Tools and Integrated Manufacturing Equipment of the Education Ministry and Key Lab. of Manufacturing Equipment of Shaanxi Province, Xi’an University of Technology, Xian, China)
Yan Li (Key Lab. of NC Machine Tools and Integrated Manufacturing Equipment of the Education Ministry and Key Lab. of Manufacturing Equipment of Shaanxi Province, Xi’an University of Technology, Xian, China)
Bo Yang (Key Lab. of NC Machine Tools and Integrated Manufacturing Equipment of the Education Ministry and Key Lab. of Manufacturing Equipment of Shaanxi Province, Xi’an University of Technology, Xian, China)
Yanyan Zhu (Key Lab. of NC Machine Tools and Integrated Manufacturing Equipment of the Education Ministry and Key Lab. of Manufacturing Equipment of Shaanxi Province, Xi’an University of Technology, Xian, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 23 October 2020

Issue publication date: 4 March 2021

135

Abstract

Purpose

The nonlinear friction disturbance of the moving joint surface of the feed system can lead to the residual vibration of the system, prolong the stability time of the system and reduce the motion precision and machining precision of the machine tool. This paper aims to concern the vibration between joint surfaces caused by nonlinear friction.

Design/methodology/approach

The model is established from the micro and macro scale based on the LuGre model. The friction characteristics of the moving joint surface are explored. The friction experiment of GCr15 pin and 45 steel disk is designed and the influence of lubrication condition, speed, acceleration and normal load on friction characteristics are studied.

Findings

Among the drive speed, damping and stiffness, the negative gradient effect of friction, which is characterized by the difference of static and dynamic friction coefficient Δµ, is the main cause of friction vibration between moving joint surfaces. Sufficient lubrication, a proper increase of speed and acceleration, a reasonable reduction of normal load can reduce the negative gradient effect, which can weaken the vibration caused by the nonlinear friction and improve the friction characteristics of the moving joint surface.

Originality/value

In the past studies, more attention has been paid to revealing the relationship between the relative speed and friction, while the acceleration is often ignored. The negative gradient effect of friction is improved in this paper by changing the contact conditions. Research findings of this paper effectively improve the friction characteristics of the moving interface and provide the basis for restraining the nonlinear vibration between the moving interfaces.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-11-2019-0476/

Keywords

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 51775432) and the Shaanxi Province Key Research and Development Program (No. 2018ZDXM-GY-074), China.

Citation

Hai, L., Gao, F., Li, Y., Yang, B. and Zhu, Y. (2021), "Friction characteristics of moving joint surface from the micro and macro scale", Industrial Lubrication and Tribology, Vol. 73 No. 2, pp. 275-282. https://doi.org/10.1108/ILT-11-2019-0476

Publisher

:

Emerald Publishing Limited

Copyright © 2020, Emerald Publishing Limited

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