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分析了通过调节辊缝获得期望的平均壁厚时钢管的横断面特性与辊缝调整量之间的关系,并由此推导出给定壁厚范围时满足某一附加公差率的芯棒直径计算公式。最后结合某Φ180mm连轧管机组提供的壁厚和芯棒直径系列,对芯棒直径系列的设计和选用方法进行了探讨。
The relationship between the cross-sectional characteristics of the steel pipe and the adjustment of the roll gap when the desired average wall thickness is obtained by adjusting the roll gap is analyzed, and the calculation of the mandrel diameter satisfying a certain additional tolerance ratio is derived from the calculated wall thickness range formula. Finally, with the series of wall thickness and mandrel diameter provided by a Φ180mm continuous rolling mill, the design and selection methods of mandrel diameter series are discussed.