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由于加工、安装、变形与磨损等原因,连铸机辊列中的辊子会偏离设计位置而产生错位,这对铸坯鼓肚变形产生较大影响。基于高温铸坯黏弹塑性本构方程,建立两辊间距内的铸坯坯壳动态鼓肚数学模型,并利用模型计算试验铸机的铸坯坯壳鼓肚曲线,依照实测数据验证了模型的有效性。根据奥钢联工业连铸机的设备及工艺参数,计算铸机不同扇形段内铸坯坯壳在不同辊子错位量情况下的鼓肚变形,并讨论在辊子发生错位的情况下辊间距对铸坯坯壳固液交界面处最大应变的影响,并给出铸机辊间距的确定方法。
Due to the processing, installation, deformation and wear and other reasons, the rollers in the continuous casting machine roll will deviate from the design position and produce dislocation, which has a greater impact on the cast belly bulge deformation. Based on the constitutive equation of viscoelasticity and plasticity of high-temperature slab, the mathematical model of dynamic bulging of billet in billet between two rolls was established. The curve of billet bulging of slab billet in the test caster was calculated by using the model. According to the measured data, Effectiveness. According to the equipment and process parameters of VAI industrial caster, the bulging deformation of billet shell in different sectors of caster was calculated under the condition of different roller displacement, and the relationship between roller spacing and casting distance The influence of the maximum strain at the solid-liquid interface of the billet shell, and gives the method of determining the distance between the caster rolls.