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联合穿轧法是在一台三辊斜轧机上用一个道次同时完成穿孔、轧管和均整三道工序。联合穿轧钢管轧机具有大变形量的特点,宜于生产高精度的小口径无缝管,尤其是尺寸精度和形状要求严格的厚壁热轧成品管。本文介绍了该轧机的主要技术性能、三种孔型方案及试件、穿轧情况。并初步分析了穿轧中出现的管尾三角形、喇叭口、内外螺纹问题及钢管的表面质量、尺寸精度。
Combined wear-rolling method is a three-roller cross-rolling mill with a pass at the same time to complete the perforation, rolling pipe and the whole three processes. The combined wear and tear of steel pipe rolling mill has the characteristics of large deformation, suitable for the production of high precision small diameter seamless pipe, especially the precision and shape of the hot-rolled thick-walled product pipe. This paper introduces the main technical performance of the mill, three kinds of hole programs and test pieces, wear rolling situation. The problems of tube tail triangle, flare, internal and external thread, surface quality and dimension precision of steel tube were analyzed preliminarily.