How to produce seamless steel tube

According to the different production methods can be divided into hot-rolled pipe, cold rolled pipe, cold-drawn pipe, extrusion pipe and so on. 1.1, hot-rolled seamless pipe generally in the automatic pipe mill production. The solid tube billet is inspected and removed from the surface defect, cut to the desired length, centering on the end face of the tube billet perforation, and then sent to the heating furnace for heating, perforated on the piercing machine. In the perforation at the same time constantly rotating and forward, in the roll and the role of the head, Tube billet gradually formed a cavity, called capillary. And then sent to the automatic pipe mill to continue rolling. At last, all the whole machine is full of wall thickness, and the size of sizing machine is reached.

　　It is an advanced method to produce hot-rolled seamless steel tubes by continuous rolling mill. 1.2. If you want to obtain a smaller size and better quality seamless pipe, you must adopt cold rolling, cold drawing or the combination of the two methods. Cold rolling is usually carried out on two-roll mill, and the steel pipe is rolled in the annular hole type composed of the circular hole groove and the fixed conical head.

　　Cold drawing is usually carried out on a 0.5~100t or double chain type cold drawing machine. 1.3, extrusion method is about to heat the tube billet in a closed extrusion cylinder, piercing rod and the extrusion rod movement, so that the extrusion from the smaller die hole extrusion. This method can produce steel pipe with smaller diameter.