The Research Of Inverse Control Model And The Quality Of Strand

Compared to the traditional die casting method, Continuous casting process not onlygreatly improves the rate of metal yield, but also significantly improves the quality ofslabs and has now been widely adopted by iron and steel enterprises throughout the world.The most important part of a continuous casting machine is its mould, which known as"the heart of continuous casting equipment". Continuous casting mould did not oscillate inthe early days, so often appear billet and mold wall adhesion phenomenon, resulting incontinuous casting slab can not be carried out smoothly. Then, oscillated mold appearedand greatly improved this phenomenon. But the vibration led to the introduction of surfaceoscillation marks of slabs. The depth of oscillation mark plays a crucial effect on thequality of continuous casting billet and obviously, in order to ensure the smoothproduction of the continuous casting, the depths of vibration marks should be as light aspossible. From the view of the vibration of the mold, researchers study the oscillationwaveform, control model and parameters in order to improve the surface quality of billetsand lubricating condition.The reverse vibration control model which is applied to the oscillated mold is themost excellent control model. Its main characteristics are that the amplitude of mouldincreases with the increasing of casting speed and the frequency of mould decreases withthe decreasing of the casting speed. Based on the technology of mold oscillation incontinuous casting and combined with the information provided by a steel enterprise, thispaper clearly confirms the vibration waveform used by the continuous casting mouldwhich is introduced from VAI. Based on the research of reverse control model which isintroduced from VAI, this paper confirmed the main process parameters whichsignificantly influence the continuous casting production. This paper also analyzed theinfluences of the main process parameters on the depth of oscillation marks and the slagconsumption and established the optimization model of mould oscillation inverse controlbased on the genetic algorithm. The reverse control optimization model of user interfaceusing MATLAB was established which provided the theory basis and convenience for the selection and optimization of the vibration parameters in practical production.