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Research Article | Open Access

Tribological properties of textured stator and PTFE-based material in travelling wave ultrasonic motors

Jinbang LI1( ), Shuaishuai ZENG1, Shuo LIU1, Ningning ZHOU2, Tao QING2
Faculty of Mechanical Engineering and Mechanics, Ningbo University, Ningbo 315211, China
Beijing Key Laboratory of Long-life Technology of Precise Rotation and Transmission Mechanisms, Beijing Institute of Control Engineering, Beijing 100029, China
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Abstract

This study fabricated textures on the stator surface of a traveling wave ultrasonic motor (USM) using laser and investigated the tribological behavior of a polytetrafluoroethylene (PTFE) composite friction material and stator. Initially, the effect of textures with different densities was tested. As the results suggested, the generation of large transfer films of PTFE composite was prevented by laser surface texturing, and adhesive wear reduced notably despite the insignificant decrease in load capacity and efficiency. Next, the 100-h test was performed to further study the effects of texture. Worn surface and wear debris were observed to discuss wear mechanisms. After 100 h, the form of wear debris changed into particles. The wear mechanisms of friction material sliding against the textured stator were small size fatigue and slight abrasive wear. The wear height of friction material decreased from 3.8 μm to 1.1 μm. This research provides a method to reduce the wear of friction materials used in travelling wave USMs.

Keywords

laser surface texturingultrasonic motorPTFE-based materialfrictionwear mechanisms

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Friction
Volume 8 Issue 2,
April 2020
Pages 301-310
DOI: 10.1007/s40544-018-0253-3
Cite this article:
LI J, ZENG S, LIU S, et al. Tribological properties of textured stator and PTFE-based material in travelling wave ultrasonic motors. Friction, 2020, 8(2): 301-310. https://doi.org/10.1007/s40544-018-0253-3

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Received: 30 May 2018
Revised: 16 September 2018
Accepted: 28 October 2018
Published: 18 January 2019
© The author(s) 2018

This article is published with open access at Springerlink.com

Open Access: The articles published in this journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http:// creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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