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方矩形管连续辊弯成型延伸规律

, PP. 487-493

Keywords: 连续轧制,方矩形管,辊弯成型,延伸率,有限元

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Abstract:

为了减小方矩形管辊弯成型时纵向延伸,结合某厂实际生产工艺,建立了方矩形管辊弯成型七机架的三维弹塑性非线性有限元模型。通过仿真分析得到了方矩形管辊弯成型时横向金属流动规律及纵向延伸率的分布规律,与现场测量结果一致。分析了轧辊转速、管坯壁厚、辊径位置等因素对延伸率的影响,在此基础上优化了辊弯轧制工艺参数。结果表明:优化后的辊弯轧制工艺提高了方矩形管的成型质量,为预测最终成型尺寸精度和辊弯成形工艺参数的制定提供了理论依据。

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