620mm熱軋AGC系統(tǒng)的研究與分析
[Abstract]:The size error of strip thickness is a key index to measure product quality. Therefore, the research and improvement of hydraulic automatic thickness control system (HAGC) is one of the important means to improve the quality of strip steel products. This paper focuses on the systematic research and analysis of automatic thickness control system for finishing mill. The main contents are as follows: (1) by reading a large number of books and documents on automation and automatic thickness control system of continuous rolling mill system, The development history and present situation of thickness control technology at home and abroad are studied. (2) the factors that may affect the thickness of steel strip are divided into 29 kinds. After summing up, it is classified as three kinds of interference factors: inlet rolling piece, mill stand equipment and mill control system. How to overcome these interference factors to minimize the negative influence on strip thickness is the direction and goal of our research on automatic control of plate thickness. (3) the compensation of thermal expansion and wear, eccentric compensation and tension loss compensation of roll are studied. Oil film thickness compensation, second flow compensation and mill stiffness compensation. The control principle, advantages and disadvantages of three typical AGC control modes of GM-AGC, feedforward AGC and monitoring AGC are put forward. (4) based on the configuration of existing automation equipment, the process of hot strip production is studied. The function and effect of basic automation and process automation in automatic thickness control are discussed and analyzed. By comparing the data and curves of the finished rolled strip with or without AGC control and AGC control, it is found that the actual thickness of the strip is obviously uneven and fluctuates with the maximum range of 鹵50 渭 m when the AGC is not used. After using feedforward AGC and monitoring AGC, the measured thickness fluctuation range of strip steel becomes smaller obviously, and the thickness accuracy of finished strip is obviously improved by controlling the thickness within 鹵20 渭 m.
【學(xué)位授予單位】:華北理工大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2017
【分類(lèi)號(hào)】:TG333
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