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Control method for steel strip roughness in Two-stand temper mill rolling

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Abstract

How to control surface roughness of steel strip in a narrow range for a long time has become an important question because surface roughness would significantly influence the appearance of the products. However, there are few effective solutions to solve the problem currently. In this paper, considering both asperities of work roll pressing in and squeezing the steel strip, two asperity contact models including squeezing model and pressing in model in a two-stand temper mill rolling are established by using finite element method (FEM). The simulation investigates the influences of multiple process parameters, such as work roll surface roughness, roll radius and roll force on the surface roughness of steel strip. The simulation results indicate that work rolls surface roughness and roll force play important roles in the products; furthermore, the effect of roll force in the first stand is opposite to the second. According to the analysis, a control method for steel strip surface roughness in a narrow range for a long time is proposed, which applies higher work roll roughness in the first stand and lower roll roughness in the second to make the steel strip roughness in a required narrow range. In the later stage of the production, decreasing the roll force in the first stand and increasing the roll force in the second stand guarantee the steel strip roughness relatively stable in a long time. The following experimental measurements on the surface topography and roughness of the steel strips during the whole process are also conducted. The results validate the simulation conclusions and prove the effect of the control method. The application of the proposed method in the steel strip production shows excellent performance including long service life of work roll and high finished product rate.

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Authors and Affiliations

  1. School of Mechanical Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Rui Li, Qingdong Zhang, Xiaofeng Zhang, Meng Yu & Bo Wang

Authors
  1. Rui Li
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  2. Qingdong Zhang
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  3. Xiaofeng Zhang
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  4. Meng Yu
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  5. Bo Wang
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Corresponding author

Correspondence to Rui Li.

Additional information

Supported by National Natural Science Foundation of China (Grant Nos. 51174248, 51475039)

LI Rui, born in 1983, is currently an associate professor at University of Science and Technology Beijing, China. She received her PhD degree from Tsinghua University, in 2008. Her research interests include tribology in plastic machining and nanotribology.

ZHANG Qingdong, born in 1965, is currently a professor at University of Science and Technology Beijing, China. He received his PhD degree from University of Science and Technology Beijing, China, in 1994. His research interests include steel strip cold rolling and plastic forming.

ZHANG Xiaofeng, born in 1980, is currently a lecturer at University of Science and Technology Beijing, China. He received his PhD degree from University of Science and Technology Beijing, in 2010. His research interests include mechanical analysis and electromechanical control of strip rolling.

YU Meng, born in 1982, is currently an engineer at Shougang Technology Research Institute, China. He received his PhD degree from University of Science and Technology Beijing, China, in 2008.

WANG Bo, born in 1986, is currently an engineer at Chinese Academy of Space Technology, China. He received his master degree from University of Science and Technology Beijing, China, in 2011.

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Li, R., Zhang, Q., Zhang, X. et al. Control method for steel strip roughness in Two-stand temper mill rolling. Chin. J. Mech. Eng. 28, 573–579 (2015). https://doi.org/10.3901/CJME.2015.0310.027

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  • DOI: https://doi.org/10.3901/CJME.2015.0310.027

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