The method of manufacturing precision steel plant in Shandong http: //www.sdlggg.com
According to the different production methods can be divided into hot-rolled pipes, cold-rolled, cold-drawn tubes, squeeze tubes. 1.1, hot-rolled seamless pipe generally Unit in the automatic rolling production. Solid tube defects after inspection and clear surface, cut to a desired length, end to end in the perforated tube surface-centering, and then sent to the furnace heating, punch in punch, while continuing to rotate and move forward at the perforation, the role of the roll and the plug, tube gradually formed inside empty chamber, said capillary. then sent to continue rolling automatic rolling machine. Finally, after all the whole entire wall thickness of both, the sizing mill sizing, to specifications. use of continuous production of hot-rolled seamless pipe mill is more advanced approach. 1.2. If you want to get a smaller size and better quality, seamless, must be cold-rolled, cold drawn or a combination of the two. cold rolling is usually carried out on a two-roll mill, round steel pipe Variable Section the rolling annular groove and the tapered head pass hole immobile thereof. Drawing is usually 0.5 ~ 100T single chain or double chain drawing machine. 1.3, extrusion billet upcoming heating good within extrusion cylinder in sealed, perforated stick together and extruded rod movement, the pressing member is extruded from the die hole smaller. This method can produce smaller diameter steel pipe.