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Calculation Method of Loa4s on Skew Roll Mill for Web Expansion of H-Beam

机译:H型钢腹板扩展斜辊轧机中Loa4的计算方法

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摘要

In order to select adequate rolling conditions for the web expansion of H-beams by the new beam rolling mill "Skew Roll Mill (SKM) , a method of calculating loads on 5KM is proposed in this study. First, the equation of the mean compression stress during the thickness reduction at both ends of the web is theoretically introduced using both the balance equation of lateral stresses and the yield criterion by assuming the plane strain state. Secondly, experimental equations of the boundary stresses are established on the basis of plasticine-model and hot-rolling-model experimental findings. Moreover, an equation of the mean roll pressure is given by proportionally combining the theoretical equation of the mean compression stress with the experimental equation of the boundary stress. As a result, equations of the radial force are introduced using the mean roll pressure. Then equations of the thrust force depending on the radial force, the strain stress and shear stresses are introduced. The rolling torque can be calculated using the radial force and the thrust force. Results calculated using this model under various rolling conditions, including the geometrical relationship between the roll and H-beam, and the rolling temperature, agree well with hot-rolling-model experimental data.
机译:为了选择新型束流轧机“斜辊轧机(SKM)”为H型钢的腹板扩展选择合适的轧制条件,本研究提出了一种计算5KM载荷的方法。首先,平均压缩方程假定平面应变状态,利用侧向应力平衡方程和屈服准则,从理论上介绍了腹板两端减薄时的应力,其次,在塑性模型的基础上建立了边界应力的实验方程。此外,通过将平均压缩应力的理论方程式与边界应力的实验方程式成比例地组合,得出了平均轧制压力的方程式,从而得到了径向力方程式。用平均侧倾压力引入,然后推导取决于径向力,应变应力和剪切应力的推力方程。可以使用径向力和推力来计算滚动扭矩。使用该模型在各种轧制条件下(包括轧辊和H型钢之间的几何关系以及轧制温度)计算出的结果与热轧模型实验数据吻合良好。

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