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采用压弯法对U型截面型钢进行逐步冷弯成形分析。通过有限元分析和试验研究相结合的方式,验证了有限元分析结果的可靠性。设计了正交试验,分析了各因素对回弹量的影响,并通过回归分析,得到U截面型钢压弯回弹的预测模型,将影响型钢回弹的主要因素确定为材料机械性能、相对弯曲半径和截面形状。最终经现场试验检验,该预测模型具有较好的可靠性。
Bending bending method was used to analyze the U-shaped section steels gradually. Through the combination of finite element analysis and experimental research, the reliability of the finite element analysis is verified. The orthogonal test was designed and the influence of each factor on the springback was analyzed. The regression model was used to get the prediction model of the springback of U-section steel. The main factors affecting the rebound of the section steel were identified as mechanical properties, relative bending Radius and cross-sectional shape. Finally, the field test shows that the prediction model has good reliability.