基于有限元分析和田口方法的压扁矫正优化分析
Optimization of Flattening Straightening with Finite Element Analysis and Taguchi Method
李红英1， 邓云喆1， 李阳华1,2， 康巍1
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作者单位：1.中南大学 有色金属材料科学与工程教育部重点实验室， 湖南 长沙 410083; 2. 衡阳华菱钢管有限公司 技术中心， 湖南 衡阳 421001）
中文关键字：矫直； 压扁量； V150； 田口方法； 信噪比； 变异分析
英文关键字：straightening; flattening rate; V150; Taguchi method; SN ratio; analysis of variance
中文摘要：基于有限元分析和田口方法，提出了适合于2-2-2型六斜辊矫直机压扁量优化的方法。应用有限元软件建立了V150油套管在六斜辊矫直机上的三维压扁矫正有限元模型，动态模拟了V150套管的压扁矫正过程，根据田口方法对压扁量进行了优化稳健设计，采用望小特性之信噪比SN评估了椭圆度的品质特性，并考虑了油套管的初始椭圆度和矫正后油套管椭圆度沿轴向分布两种干扰因素。实验结果表明：实验误差很小，第1、3、2对辊压扁量分别为不重要因子、较重要因子、最重要因子，压扁量的最优组合为1.4、4.0、2.6 mm。以压扁量最优组合进行矫正后，V150油套管椭圆度大大降低，小于允许的最大椭圆度0.4%，达到了圆度要求，实现了对压扁量的优化。
英文摘要：A optimization method of flattening rate of type 2-2-2 6-roller straightener was proposed based on finite element analysis and taguchi method. The finite element model of correction of 3-D flattening rate was constructed to dynamically simulate the correcting process for V150 oil casing. The optimization design and robust design for flattening rate was carried out by taguchi method; using SN ratio(smaller-the-better), the effect of the ovality was evaluated, and two noise factors were taken into account, the first was initial curvature of casing, the second was the variance of the ovality along the casing. The results indicate that experimental error is very small, the first flattening rate is not a significant factor, the third flattening rate is a significant factor, and the second flattening rate is the most significant factor. The optimum combination of flattening rate is 1.4 mm, 4.0 mm, 2.6 mm, and after correcting with the optimum combination of flattening rate, the ovality is greatly reduced and meets the requirement for roundness(less than the permissible maximum value 0.4%), so the optimization of flattening rate is well achieved by the method.