平整过程中异步轧制轧制压力计算模型

doi:10.13228/j.boyuan.issn0449-749x.20230308

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Abstract The phenomenon of asynchronous rolling, where the friction coefficients between the upper and lower surfaces of the strip differ due to the uneven distribution of leveling fluid droplets on the lower surface of the strip during the temper rolling process, leads to limited accuracy when predicting the rolling pressure using conventional engineering-level leveling models. To address the issue of significant errors in calculating the rolling pressure for asynchronous rolling using these models, a calculation method suitable for asynchronous rolling is proposed. This study takes into account the process characteristics of asynchronous rolling and the actual operating conditions of the equipment. Firstly, the differences in lubrication conditions and force deformation between the upper and lower surfaces of the strip are analyzed, and equilibrium equations for the deformation zone and the equation for calculating the unit rolling pressure are established. Secondly, the differences in flattening between asynchronous and synchronous rolling are investigated. Based on the geometric relationships of deformation and the theory of elastoplastic mechanics during the rolling process between the upper and lower rolls, the calculation methods for various parameters in the deformation zone are determined. An iterative method is then employed to improve the accuracy of the calculation model. A rolling pressure calculation model suitable for the asynchronous rolling process in leveling units is established, along with a method for back-calculating the friction coefficient between the upper and lower surfaces of the strip. Finally, to validate the accuracy of the model, equipment parameters from a domestic leveling unit and typical process parameters for strip production are used. The theoretical values obtained from the rolling pressure model under different lubrication conditions are compared with calculating the rolling pressure for rolling using engineering model and the on-site measured data. The results demonstrate that the proposed asynchronous rolling pressure model can applicable to asynchronous rolling, it reduces the error by 5% compared to the engineering model during the temper rolling process and provides valuable insights.

Key words： wet leveling asynchronous rolling rolling pressure mathematical model back calculation of friction coefficient

Received: 07 June 2023

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	Articles by authors
	ZHANG Xiaoyan
	ZHANG Ji
	WANG Zhuo
	BAI Shuo
	BAI Zhenhua

Cite this article:

ZHANG Xiaoyan,ZHANG Ji,WANG Zhuo等. Calculation model of asynchronous rolling pressure during flattening process[J]. Iron and Steel, 2024, 59(1): 108-116.

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http://www.chinamet.cn/Jweb_gt/EN/10.13228/j.boyuan.issn0449-749x.20230308 OR http://www.chinamet.cn/Jweb_gt/EN/Y2024/V59/I1/108

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