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为对武钢双辊薄带连铸自动控制系统辊速进行检测和控制,保持工艺稳定,提高薄带成品质量,提出了凝固终点坯壳厚度反馈修正铸辊主速度给定的数学模型。对辊速与凝固终点坯壳厚度相互关系进行了研究:辊速与凝固终点坯壳厚度近似线性关系。辊速越大,坯壳厚度越小且易断带或漏钢;辊速越小,坯壳厚度越大且易裂纹或轧卡。据此通过射钉法测量凝固终点坯壳厚度,建立最优凝固终点位置模型和凝固终点坯壳厚度反馈修正铸辊主速度给定数学模型,解决了凝固终点不能测量以及因换规格而不能准确修正主速度给定的问题。此模型为实现武钢双辊薄带连铸产业化提供了前期理论准备。
In order to detect and control the roller speed of automatic control system of twin-roll strip continuous casting in WISCO, to maintain the process stability and improve the quality of the finished strip, a mathematical model was established to feed back the main velocity of the casting roll with the thickness of the solidification endpoint. The relationship between the roll speed and the thickness of the solidification end of the shell was studied. The relationship between the roll speed and the thickness of the solidification end of the shell was approximately linear. The greater the roll speed, the smaller the thickness of the shell and easy to break with or break the steel; the smaller the roll speed, the greater the thickness of the shell and easy to crack or card. Based on this, the thickness of the solidified shell at the end of solidification was measured by the method of nailing, the optimal solidification end position model and the solidified end shell thickness were fed back to modify the given mathematical model of the main velocity of the casting roller to solve the problem that the solidification end point can not be measured, Fixed main speed given problem. This model provides pre-theoretical preparation for the industrialization of WISCO twin-roll strip casting.