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连轧管工艺是无缝钢管生产的重要工艺之一,而半浮芯棒连轧管工艺代表现代无缝钢管生产的先进技术,也是当前的研究热点。为此,采用ANSYS/LS-DYNA软件对φ109mm×7mm规格6机架半浮芯棒连轧管工艺过程进行三维热固耦合有限元模拟分析。结果表明:钢管在第4号、第5号机位横截面总等效应力最大,在前3个机位发生的总等效形变最大,第3~第5机架的轧制力明显大于其他3个机架,减径过程中钢管外壁发生明显回弹,钢管同一横截面内温度分布不均。这一研究为连轧管工艺的改进提供了技术依据。
Continuous rolling pipe technology is one of the important processes of seamless steel pipe production, and semi-floating mandrel pipe rolling process represents the advanced technology of modern seamless steel pipe production, but also the current research hotspot. To this end, the use of ANSYS / LS-DYNA software for φ109mm × 7mm size 6-frame semi-floating mandrel pipe rolling process of three-dimensional thermomechanical coupling finite element simulation. The results show that the total equivalent stress of steel tube is the highest in the cross section of No.4 and No.5 locomotives, the total equivalent deformation occurs in the first three locomotives, and the rolling force of No.3 ~ No.5 stands is obviously larger than the others In the three racks, the outer wall of the steel pipe is obviously rebounded during the reduction process, and the temperature distribution in the same cross section of the steel pipe is uneven. This research provides a technical basis for the improvement of the continuous rolling process.