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以南钢大棒材粗轧生产线为研究背景,以能耗最小和变形均匀为目标,采用差分进化算法对其粗轧工艺进行优化,并设计了相应的粗轧孔型系统。利用MSC.Marc有限元软件建立了粗轧工艺的三维弹塑性热力耦合有限元模型,通过现场试验数据验证了模型的正确性。同时对新工艺进行有限元模拟计算,并与现有工艺进行对比分析。结果表明:新工艺及孔型系统的道次变形均匀、中间坯尺寸精确,粗轧轧制总能耗降低了7.13%。
In this paper, the rough rolling production line of Nansteel large bar is taken as the research background. With the goal of minimum energy consumption and uniform deformation, the differential evolution algorithm is used to optimize its rough rolling process and the corresponding roughing pass system is designed. The three-dimensional elasto-plastic thermal-mechanical coupled finite element model of rough rolling process was established by MSC.Marc finite element software. The correctness of the model was verified by field test data. At the same time, the new technology is simulated by finite element method and compared with the existing technology. The results show that the new technology and the pass system have the same deformation, the middle billet size is accurate and the total energy consumption of the rough rolling reduces by 7.13%.