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Improved friction model for the roller LM guide considering mechanics analysis

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Abstract

In machining centers, investigating friction force in the linear motion (LM) guide is important in improving the positioning performance of the center. We analyzed the contact force and the contact pressure between the roller and raceway via the Palmgren formula and Hertzian contact theory, respectively. Based on Albrecht’s friction model, an improvement model for calculating friction force was proposed which takes into consideration the bearing’s geometrical parameters, the contact force and the changes in grease viscosity with pressure and temperature. The coefficients in the improved model were obtained from previously published experimental results. The improved model was verified by comparison to previous empirical equation results and the experimental results. The analysis showed that the improved model predicts the friction force more accurately compared to the previous model, and it will lay the theoretical foundation for predicting friction behavior in the linear motion guide.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Gyeongsang National University, Jinju, Korea

    De-Jun Cheng, Tae-Jo Park & Su-Jin Kim

Authors
  1. De-Jun Cheng
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  2. Tae-Jo Park
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  3. Su-Jin Kim
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Corresponding author

Correspondence to Su-Jin Kim.

Additional information

De-Jun Cheng is a researcher in Mechanical Engineering at Gyeongsang National University. He received a B.S. in Mechanical Engineering from Huaihai Institute of Technology in 2011 and an M.S. and Ph.D. from Gyeongsang National University in 2013 and 2017, respectively. His research interests include tribology, heat and mass transfer and tool wear.

Su-Jin Kim is a Professor of Mechanical Engineering at Gyeongsang National University. He received a B.S. in Agricultural Mechanical Engineering from Seoul National University in 1998 and an M.S. and Ph.D. in Mechanical Engineering from Korea Advanced Institute of Science and Technology in 2000 and 2005, respectively. His research interests include computeraided manufacturing and NC machining simulation.

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Cheng, DJ., Park, TJ. & Kim, SJ. Improved friction model for the roller LM guide considering mechanics analysis. J Mech Sci Technol 32, 2723–2734 (2018). https://doi.org/10.1007/s12206-018-0529-6

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  • DOI: https://doi.org/10.1007/s12206-018-0529-6

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