High-quality rolling tubes can be effectively divided into hot-rolled tubes, cold-rolled tubes, cold-drawn tubes, extruded tubes, etc., depending on the production method. Hot rolled seamless pipes are generally produced on automatic rolling mills. It is centered on the end face of the perforated end of the tube blank, then sent to a heating furnace for heating and perforated on the punching machine. At the same time, the perforation is continuously rotated and advanced. Under the action of the roll and the head, a cavity is gradually formed inside the tube blank, which is called a capillary tube. Then send it to the automatic pipe rolling machine to continue rolling. Finally, the whole machine is uniform in wall thickness, and the sizing machine is sizing to meet the specification. The production of hot-rolled seamless steel tubes by continuous rolling mills is a more advanced method.
Several advantages of high quality rolling tube
1. Rolling pipe is a kind of high-precision steel pipe material after cold drawing or hot rolling. Because the inner and outer walls of precision steel pipes have no oxide layer, high pressure and no leakage, high precision, high smoothness, no deformation of cold bending, flaring, flattening without cracks, etc., they are mainly used to produce pneumatic or hydraulic components, such as cylinders or The cylinder can be a seamless tube.
2. The rolling tube has surface residual compressive stress left on the surface layer, which helps the surface micro-crack closure and hinders the expansion of erosion. Thereby, the surface corrosion resistance is improved, and the generation or expansion of the fatigue crack can be delayed, thereby improving the fatigue strength of the honing pipe. By rolling forming, the rolling surface forms a cold hardening layer, which reduces the elastic and plastic deformation of the grinding contact surface, thereby improving the wear resistance of the inner wall of the cylinder tube while avoiding burns caused by grinding. After rolling, the surface roughness value is reduced to improve the compounding property.