Research And Optimization Of Non-sinusoidal Mold Oscillation Parameters

With the development of continuous casting technique, the demand for improving the surface quality of the product is ever increasing. The oscillation technique of CCM old has become a key technology to caster productivity. After introducing distortional rate of sinuous wave, the non-sinuous oscillation waveform breaks through the symmetry constraint of the sinuous waveform. Select the vibration parameters should also consider powder consumption and casting speed(casting speed). Research shows that can be reduced by increasing the depth of oscillation marks vibration frequency, vibration amplitude is reduced, reducing the negative slide time, improve the quality of the slab surface. Large-scale application of efficient mills in developed countries casting technology(High Speed, high-quality, high efficiency, high work rate, temperature slab), direct rolling, near-net-shape casting technology, and has made tremendous economic benefits.By studying the structure of mold oscillation mechanism and the internal friction between mold and strand, The pitch and depth of oscillation marks are two important parameters for measure the oscillation marks. So, when considering the factors slab Oscillation marks should consider these two parameters separately. To improve slab quality for the purpose of determining the parameters of non-sinusoidal oscillation laid the theoretical foundation. Based on this, non-dynamic properties of the basic parameters of the sinusoidal vibration defined, synchronization control model researched and built.By studying the characteristics of non-sinusoidal vibration waveform derived 6 vibration parameters, a mathematical model of the process parameter optimization. On this basis, Independent from other variables on four basic parameters namely vibration waveform deflection rate, vibration frequency, amplitude and the casting speed for the optimal design variables; flux consumption, spacing Oscillation marks, casting billet and the mold wall friction as the objective function; to ensure the normal pull out the slab mold is in the range of process parameters premise of constraints; the use of multidisciplinary optimization software ISIGHT optimization model. Thus optimized to obtain non-dominated solution set(Pareto Front) Pareto frontier, choose from a set of ideal solution as the optimal solution, the procedure to calculate the experience instead of computer-aided design to optimize personnel. The results showed that automatic optimization design method is feasible and effective. Details of the interface to create a parametric optimization platform based on VS2013 MFC class library that allows users to quickly and easily get the optimal solution.