生产制造方法
Production and Manufacturing Method
按生产方法不同可分为热轧管、冷轧管、冷拔管、挤压管等。冷拔无缝钢管与热轧无缝钢管之间最大的区别就是冷拔无缝钢管精密度要好过热轧无缝钢管，冷拔无缝钢管的一般精确度在20丝左右，而热轧无缝管的精密度在100丝左右，所以冷拔无缝钢管是机械加工制造业，零部件制造业的首选。
According to different production methods, it can be divided into hot-rolled pipe, cold-rolled pipe, cold-drawn pipe, extruded pipe and so on. The biggest difference between cold-drawn seamless steel pipe and hot-rolled seamless steel pipe is that the precision of cold-drawn seamless steel pipe is better than that of hot-rolled seamless steel pipe. The general precision of cold-drawn seamless steel pipe is about 20 wires, while that of hot-rolled seamless steel pipe is about 100 wires. Therefore, cold-drawn seamless steel pipe is the first in Mechanical processing and parts manufacturing industry. Choose.
1.1、热轧无缝管一般在自动轧管机组上生产。实心管坯经检查并清除表面缺陷，截成所需长度，在管坯穿孔端端面上定心，然后送往加热炉加热，在穿孔机上穿孔。在穿孔同时不断旋转和前进，在轧辊和顶头的作用下，管坯内部逐渐形成空腔，称毛管。再送至自动轧管机上继续轧制。最后经均整机均整壁厚，经定径（减径）机定径（减径），达到规格要求。利用连续式轧管机组生产热轧无缝钢管是较先进的方法。
1.1. Hot-rolled seamless tubes are generally produced on automatic tube rolling mills. The solid billet is checked and cleared of surface defects, cut into the required length, centered on the end face of the billet perforation, then sent to the heating furnace for heating, and perforated on the perforator. Under the action of the roll and the top, a cavity is gradually formed inside the billet, which is called capillary. It is then sent to the automatic pipe mill to continue rolling. Finally, the wall thickness of the whole machine is equalized, and the sizing (reducing) machine is used to achieve the specifications. It is an advanced method to produce hot-rolled seamless steel tube by continuous pipe rolling mill.