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An improved thermal model for characteristics analysis of multi-link ultra-precision press system

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Abstract

In traditional models, only the effect of temperature change of bearings on the heat generation power and thermal contact resistance is considered. But the effect of bearing stiffness and flexibility of crank shaft on the heat generation power is often neglected, thereby impairing the accuracy of the thermal analysis. Therefore, a better thermal model is demanded to accurately analyse the thermal characteristics of a Multi-link ultra-precision press system (MLUPPS). By combining the effect of stiffness of bearing and flexibility of crank shaft on the heat generation power, an improved thermal model of MLUPPS was developed in this work. The model was based on as-derived kinematic and dynamic equations of Multi-link transmission mechanism (MLTM) and flexible dynamic model of crankshaft-bearing system. The dimension chain of thermal error is constructed to analyse the dimensional error between the slider and the work table at the position of Bottom dead point (BDP). The developed thermal model of MLUPPS and its analysis results from this model are in good agreement with the measurement results, and that is more accurate than the traditional one. The simulation results reveal that the maximum temperature rise of MLUPPS occurs at the crank shaft, and the dimensional error between the slider and the work table at the position of BDP is due to thermal expansion fluctuation before the generation and conduction of heat power reaches balance. The temperature rise and thermal error of MLUPPS under different rotation speeds, piling forces and bearing stiffness were also studied.

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Author information

Authors and Affiliations

  1. Department of Mechanical Engineering, College of Engineering, Nanjing Agricultural University, Nanjing, 210031, China

    Enlai Zheng, Shilu Xie, Jin Zhang, Yue Zhu, Xiangze Lin & Min Kang

  2. Engineering Sciences, Faculty of Engineering and the Environment, University of Southampton, Southampton, SO17 1BJ, UK

    Enlai Zheng & Xiao Zhao

Authors
  1. Enlai Zheng
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  2. Shilu Xie
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  3. Jin Zhang
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  4. Yue Zhu
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  5. Xiao Zhao
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  6. Xiangze Lin
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  7. Min Kang
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Correspondence to Enlai Zheng.

Additional information

Recommended by Associate Editor Da-Cheol Ko

Enlai Zheng received his B.S. and Ph.D. degrees in Mechanical Engineering from Nanjing Institute of Technology and Southeast University in 2008 and 2013, respectively. He is currently an Associate Professor in the Faculty of Mechanical Engineering in Nanjing Agricultural University, and a visiting scholar in the Faculty of Engineering and the Environment in University of Southampton. His research field is mainly focused on dynamic design and control of machine.

Jin Zhang received his B.S. degree in Mechanical Design, Manufacturing and Automation from College of Engineering, Nanjing Agricultural University in 2016. He is currently a postgraduate student and pursuing for M.S. degree in Mechanical Engineering from Nanjing Agricultural University. His research interest is thermal error modelling, analysis and compensation of machine.

Yue Zhu received his B.S. and M.S. degrees in Mechanical Engineering from Jiangsu University of Science and Technology, and Southwest University of Science and Technology in 1998 and 2007. He received his Ph.D. degree in Mechanical Engineering from Nanjing University of Aeronautics & Astronautics in 2011. He is currently a Lecturer in the Faculty of Mechanical Engineering in Nanjing Agricultural University. His research interest is focused on model updating and validation, and vibration control.

Xiao Zhao received his B.S. and Ph.D. degrees in Materials Science and Engineering from Huazhong University of Science and Technology in 2011 and 2016, respectively. He is currently a Research Fellow in the Faculty of Engineering and the Environment in University of Southampton. His research interest is focused on thermal error modelling and compensation of mechanical system.

Xiangze Lin received his B.S. and M.S. degrees from Southeast University in 2000 and 2006. He received his Ph.D. degree from Nanjing University of Science and Technology in 2012. He worked as a Visiting Scholar in University of Texas from May 2015 to May 2016. He is currently an Associate Professor in the College of Engineering, Nanjing Agricultural University. His main research interests include dynamic design and control of machine.

Min Kang received his B.S. and M.S. degrees in Mechanical Engineering from Northeastern University and Xi’an Jiaotong University in 1986 and 1989, respectively. He received his Ph.D. degree in Mechanical Engineering from Nanjing University of Aeronautics and Astronautics in 2003. He is currently a Professor in the College of Engineering in Nanjing Agricultural University. His research interest is focused on design and control of machining technology and machine.

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Zheng, E., Xie, S., Zhang, J. et al. An improved thermal model for characteristics analysis of multi-link ultra-precision press system. J Mech Sci Technol 32, 291–313 (2018). https://doi.org/10.1007/s12206-017-1230-x

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  • DOI: https://doi.org/10.1007/s12206-017-1230-x

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