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本文对钢管连轧的新工艺—可控芯棒连轧管工艺在实验室试验轧机上进行了初步的研究。实验指出,可控芯棒和全浮芯棒相比,在其它条件相同的情况下,可以使平均轧制压力和金属对芯棒的平均单位压力显著下降。同时,可以有效地提高钢管壁厚精度。指出了在3～4机架轧制时,各机架不同的延伸率分配对钢管壁厚精度的影响。试验了四种不同类型的润滑剂和变锥度的分段组合芯棒,取得了一定的结果。据此,作者提出了采用3～4机架可控芯棒连轧管工艺改造我国小型自动轧管机组的意见。
In this paper, a new process of continuous rolling of steel pipe - controlled mandrel continuous rolling pipe technology in the laboratory test of the mill conducted a preliminary study. Experiments show that the controllable mandrel compared with the full floating mandrel, the other conditions are the same, you can make the average rolling pressure and metal on the mandrel average pressure drop significantly. At the same time, it can effectively improve the wall thickness accuracy. It is pointed out that in the 3 ~ 4 frame rolling, the effect of different elongation distribution of each frame on the precision of the pipe wall thickness. Four different types of lubricant and tapered tapered mandrel were tested and some results were obtained. Accordingly, the author put forward the suggestion of using 3 ~ 4 rack controllable mandrel rolling process to transform our country’s small automatic mill assembly.