连铸结晶器新型非正弦振动波形函数的开发

摘要/Abstract

摘要：

结晶器非正弦振动可以获得较短的负滑动时间、较长的正滑动时间，有助于减小铸坯表面振痕，增加保护渣消耗，提高铸坯表面质量。但非正弦振动的加速度大,增大了振动的惯性力，降低了结晶器运动的平稳性。针对此问题，构造了一种新型结晶器振动波形函数，将加速度作为确定波形函数的一个影响因素，通过给定加速度控制波形函数的具体形式，可以保证良好的波形动力学特性。在恒定的加速度下,通过增大波形偏斜率,可缩短负滑动时间，延长正滑动时间，增强振动的非正弦特性，而不影响结晶器振动平稳性；同时可以通过减小振动加速度来缩短负滑动时间。该波形函数光滑连续，不会产生刚性和柔性冲击，具有良好的动力学特性。

关键词: 连铸, 结晶器, 非正弦振动, 波形函数

Abstract:

The short negative strip time and long positive strip time of mold non-sinusoidal oscillation could shallow the oscillation marks on the slab surface and enhance the powder consumption and the surface quality of the continuous casting slab. But the higher acceleration made the inertial force bigger and affected the mold movement smoothness. To solve this problem, a new type waveform function of the mold non-sinusoidal oscillation was constructed, where the acceleration was a constituent part of the function. During the oscillation function determination, the acceleration could be taken into account to ensure the dynamic characteristics of the wave function. For this wave function, in the case of constant acceleration, enlargement of the waveform deviation factor resulted in the decrease of negative strip time and increase of positive strip time with no effects on the movement smoothness of mold. In the case of the constant waveform deviation factor, the shorter negative strip time made the acceleration smaller also. This non-sinusoidal oscillation function has the advantages of continuity, no rigid impact and flexible impact, and good dynamics.

Key words: characteristics , continuous casting;mold;non-sinusoidal oscillation;waveform function

中图分类号:

TF777.1

张兴中, 方一鸣, 王浩宇. 连铸结晶器新型非正弦振动波形函数的开发[J]. 中国机械工程, 2013, 24(24): 3375-3379.

Zhang Xingzhong, Fang Yiming, Wang Haoyu. New Type Waveform Function Construction of Non-sinusoidal Oscillation for Continuous Casting Mold[J]. China Mechanical Engineering, 2013, 24(24): 3375-3379.

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