Pre-precision welding technology is currently the most advanced saw pipe of pipe technology, it has the advantage to effectively solve the problem of mutual interference between forming and welding, and give full play to their respective advantages forming and welding, to achieve the organic combination of high speed and low speed welding molding, greatly improve the yield and quality of the production line, effectively reducing the cost of production.
Pre-finish welding process is the spiral forming and welding separately, also called a two-step method.
Step one: high speed steel shaped into a tube, while using carbon dioxide gas welding pre-welding.
Step two: pre-welded steel pipe after finish welding equipment on a separate zone for final finishing welding, internal and external multi-wire submerged arc welding can be used depending on the situation.
Fine welder group consisting of lead, arc plate welding equipment, transport control car, conveyor roller, fine welding bench and so on. Fine welding bench by the conveying roller, longitudinal transfer tracks, sliding truck, orthogonal roller and the drive chassis, internal welding system, outside welding systems, operating system and other components.
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