针对热连轧粗轧区立轧轧制力在线模型预报精度低的问题，采用有限元软件DEFORM模拟了板坯热连轧粗轧区立轧过程，分析了板坯立轧过程轧制力预报精度低的原因。通过对有限元模拟结果的分析，给出了板坯立辊轧边时计算变形程度的新方法，并通过回归得到了适合板坯立轧轧制力计算的外端应力状态影响系数公式，进而得到了新的轧制力计算公式。经与现场实测数据比较，明显提高了立轧轧制力的预报精度。
In order to improve the prediction precision of online model for vertical rolling force in roughing trains of hot strip mill, the process of hot strip roughing trains was simulated by the FEM simulation software DEFORM. The cause of low prediction precision of rolling force during vertical rolling was analyzed. Then the new method for calculating deformation degree when edge rolling was presented by analysis of the FEM simulated results. The formula of external stress status modulus, which is fit for the vertival rolling force calculation, was obtained by analytic regression. Furthermore, a new formula about rolling force calculation was gained. It was approved that the prediction precision was obviously enhanced compared with the practical data for vertical rolling force.
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