結(jié)晶器反向振動控制模型及鑄坯質(zhì)量研究
[Abstract]:Compared with the traditional die casting process, the continuous casting process not only greatly improved the metal yield, but also significantly improved the quality of billet, which has been widely used by iron and steel enterprises all over the world. And the most important part of the continuous casting machine is the mold, known as the "heart" of continuous casting equipment. The early continuous casting mould is stationary, so the continuous casting billet is often bonded to the inner wall of the mold, which leads to the continuous casting production not going on smoothly. Subsequently, the appearance of oscillatory crystallizer greatly improves this phenomenon, but the introduction of oscillation leads to the formation of vibration mark on the surface of billet. The depth of vibration mark plays an important role in the quality of continuous casting billet. Obviously, the shallower the vibration mark is, the better the slab vibration mark is under the premise of ensuring smooth continuous casting production. Based on the oscillation of mould, the surface quality and lubrication condition of continuous casting billet are improved by studying the waveform, control model and parameters of mold oscillation. Reverse oscillation control model is the most effective control model applied to mould oscillation so far. Its main feature is that the amplitude of the crystallizer increases with the increase of the casting speed and the frequency decreases with the decrease of the casting speed. In this paper, on the basis of continuous casting mould oscillation technology, combined with the information provided by a certain iron and steel department, the oscillation waveform of continuous casting mould imported from VAI is defined, and the reverse control model of its matching application is studied. The main vibration parameters affecting continuous casting production are deduced. The main technological parameters affecting the formation and depth of oscillation mark and the consumption of mold slag are analyzed, and the optimization model of mould oscillation reverse control based on genetic algorithm is established. The user interface of reverse control optimization model is made by using MATLAB, which provides a theoretical basis and convenience for the selection and optimization of vibration parameters in practical production.
【學位授予單位】:燕山大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:TF341.6;TB535
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