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Article

Research on the Vertical Vibration Characteristics of Hydraulic Screw Down System of Rolling Mill under Nonlinear Friction

by 1,2, 1,3,*, 4,* and 1
1
Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control, Yanshan University, Qinhuangdao 066004, China
2
National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, China
3
Heavy-duty Intelligent Manufacturing Equipment Innovation Center of Hebei Province, Yanshan University, Qinhuangdao 066004, China
4
Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China
*
Authors to whom correspondence should be addressed.
Processes 2019, 7(11), 792; https://doi.org/10.3390/pr7110792
Received: 31 August 2019 / Revised: 1 October 2019 / Accepted: 15 October 2019 / Published: 2 November 2019
(This article belongs to the Special Issue Smart Flow Control Processes in Micro Scale)
The rolling mill with hydraulic system is widely used in the production of strip steel. For the problem of vertical vibration of the rolling mill, the effects of different equivalent damping coefficient, leakage coefficient, and proportional coefficient of the controller on the hydraulic screw down system of the rolling mill are studied, respectively. First, a vertical vibration model of a hydraulic screw down system was established, considering the nonlinear friction and parameter uncertainty of the press cylinder. Second, the correlation between different equivalent damping coefficient, internal leakage coefficient, proportional coefficient, vertical vibration was analyzed. The simulation results show that, in the closed-loop state, when Proportional-Integral-Derivative (PID) controller parameters are fixed, due to the change of the equivalent damping coefficient and internal leakage coefficient, the system will have parameter uncertainty, which may lead to the failure of the PID controller and the vertical vibration of the system. This study has theoretical and practical significance for analyzing the mechanism of vertical vibration of the rolling mill. View Full-Text
Keywords: rolling mill; hydraulic screw down system; vertical vibration; LuGre model; friction-induced vibration; flow control; PID controller rolling mill; hydraulic screw down system; vertical vibration; LuGre model; friction-induced vibration; flow control; PID controller
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MDPI and ACS Style

Zhang, Y.; Jiang, W.; Zhu, Y.; Li, Z. Research on the Vertical Vibration Characteristics of Hydraulic Screw Down System of Rolling Mill under Nonlinear Friction. Processes 2019, 7, 792. https://doi.org/10.3390/pr7110792

AMA Style

Zhang Y, Jiang W, Zhu Y, Li Z. Research on the Vertical Vibration Characteristics of Hydraulic Screw Down System of Rolling Mill under Nonlinear Friction. Processes. 2019; 7(11):792. https://doi.org/10.3390/pr7110792

Chicago/Turabian Style

Zhang, Yongshun, Wanlu Jiang, Yong Zhu, and Zhenbao Li. 2019. "Research on the Vertical Vibration Characteristics of Hydraulic Screw Down System of Rolling Mill under Nonlinear Friction" Processes 7, no. 11: 792. https://doi.org/10.3390/pr7110792

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