Cangzhou Junde Steel Pipe Co.,Ltd
Add: South of Qiantong Road, Cangzhou City, Hebei, China
Contact us:Sunny Yang
1, hot-rolled seamless square pipe is generally produced in the automatic rolling mill unit. The solid tube is inspected and cleared of surface defects, cut into the required length, centered on the end face of the perforation of the tube, and then sent to the heating furnace for perforation. In the perforation at the same time continue to rotate and forward, in the roll and the role of the head, the tube gradually formed inside the cavity, said capillary. And then sent to the automatic rolling mill to continue rolling. Finally, the whole machine is the whole wall thickness, the sizing machine to achieve the specifications. The use of continuous rolling mill production of hot-rolled seamless steel pipe is a more advanced method.
2, if you want to get smaller and better quality seamless pipe, must use cold rolling, cold drawing or a combination of the two methods. Cold rolling is usually carried out on a two-roll mill where the steel pipe is rolled in a ring-shaped bore formed by a variable cross-section round hole and a stationary tapered head. The cold drawing is usually carried out on a single chain or double chain type drawing machine of 0.5 to 100T.
3, the extrusion method is about to heat a good tube placed in a closed extrusion cylinder, perforated rods and squeeze bar with the movement, so that extrusion from the smaller die hole extrusion. This method can produce smaller diameter steel pipe.
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