Year1
- 规格：
- 219-3500mm
- 规格：
- 6-28
The welding method of spiral steel pipe is submerged arc welding forming process. Front swing intermittent production unit speed.-Welding speed.-. The unit consists of uncoiler, straightening machine, centering device, hydraulic shear, milling and welding machine, disc shear, edge milling machine, board cleaning equipment, delivery machine, board edge pre-bending equipment, forming machine, internal welding, external welding, It consists of flashing, pulling out, slag dumping, repair welding, flat head chamfering, hydraulic inspection, finished product inspection, and oil removal collection. The whole process of submerged arc welding of spiral steel pipe is as follows. The principle of spiral steel pipe-submerged arc welding: Submerged arc welding uses arc heat energy for welding. The difference from manual arc welding is that the wire of submerged arc welding is exposed and has no coating on it. Welding requires that the flux is laid in advance on the area to be welded. The submerged arc welding wire is inserted into the flux and the arc burns under the flux. The welding wire comes into contact with the workpiece and the start button is pressed. At the moment when the welding wire and the workpiece are energized, the welding wire is withdrawn and the arc ignites the welding trolley. The welding wire is continuously transported downwards to maintain the arc burning under the flux layer and form a welding pool below the arc. The flux melts around the arc to form a cavity. This cavity and molten pool continue to advance while the metal behind the molten pool solidifies to form a continuous weld. Since this process is performed under flux, we cannot see it with the naked eye. Visible with the aid of radiography. Since the spiral steel pipe adopts the welding technology of submerged arc automatic welding, the production efficiency is high, the production auxiliary time is less, the time of changing welding rods is saved, the welding conditions are clean and spatter-free, and the cleaning time is saved, and the weld quality is high. It also provides necessary conditions for the delivery of spiral steel pipe factories, ensuring the production time of large quantities of spiral steel pipes, so it is still widely used. Spiral seam submerged arc welded steel pipe is formed by bending the strip in a spiral shape and using submerged arc automatic welding to weld the inner seam and outer seam to form a spiral seam steel pipe. It can be widely used in the production of large-diameter steel pipes for the following reasons: Steel pipes of various diameters can be produced from strip steel of the same width as long as the forming angle is changed) Because it is continuously bent and formed, the fixed length of the steel pipe is not limited) The welds are spirally distributed evenly on the entire circumference of the steel pipe, so the steel pipe has high dimensional accuracy and high strength.) The equipment is cheap and easy to change the size. It is suitable for the production of small batches and multiple varieties of steel pipes. The company has complete production equipment and advanced production technology. In order to ensure quality, the group company strictly implements the quality management system and is equipped with advanced online ultrasonic, optical industrial TV, manual ultrasonic, hydrostatic testing machine, universal material testing machine and other equipment to conduct random inspections of products. The principle of combining mutual inspection and full inspection strictly controls quality and prevents any unqualified product from leaving the factory. In particular, we have mastered the production technology of diameter-grade spiral steel pipes, which is already at the leading level in the international industry. It can produce double-sided submerged arc welded steel pipe products with diameters and wall thicknesses of various materials and steel grades in compliance with /- standards, .- standards and
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