机械制造业、石油和化学工业、原子能工业等部门需要的热轧管材通常在螺旋轧机上生产。螺旋穿孔机用来将坯料穿成毛管,而螺旋轧管机将毛管辗轧成管材,然后经定径机和均整机精整。对于大量生产管材来说,螺旋轧管机比其它轧管机优越,因此得到广泛推广。螺旋轧管机的特点是:生产很经济,生产工具通用性大而寿命高,孔型调整简单,能够生产高精度的管材。同时,螺旋轧管机通常决定了轧管机组的生产率和无缝管的内表面质量:这种轧机 Hot-rolled pipes, which are required by machinery manufacturing, oil and chemical industry, atomic energy industry, etc., are usually produced on spiral mills. Spiral piercing machine is used to put the blank into a capillary tube, and the spiral pipe mill will be the capillary tube rolled into pipe, and then through the sizing machine and the whole machine finishing. Spiral pipe mills are superior to other pipe mills for mass production of pipes and are therefore widely promoted. Spiral pipe mill is characterized by: the production is very economical, versatile production tools and high life expectancy, hole adjustment is simple, capable of producing high-precision pipe. At the same time, spiral pipe mills usually determine the productivity of the pipe rolling unit and the quality of the seamless pipe’s inner surface: the mill