Large straight-line joint submerged arc welding tube fast production process
A technology of straight seam submerged arc welding and production method, applied in arc welding equipment, welding equipment, other manufacturing equipment/tools, etc., can solve the problem of not having the production capacity of large-diameter straight seam submerged arc welded pipes, etc., to ensure the overall production efficiency , The welding seam quality is reliably guaranteed, and the process design is reasonable.
Active Publication Date: 2009-07-22
PANYU ZHUJIANG STEEL PIPE LIANYUNGANG
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Problems solved by technology
At present, the production of high-frequency straight seam pipes mainly adopts ERW production units, but this process is limited to the production of a single product of high-frequency welded steel pipes, and currently does not have the production capacity for large-diameter straight seam arc welded pipes
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[0011] The present invention will be further described below in conjunction with accompanying drawing.
[0012] as attached figure 1 As shown, the coil feeding method of the present invention is cutting, shearing butt welding, using edge milling to complete the on-line processing of the edge bevel, initial roll forming, roll fine forming, and high-frequency pre-welding after the billet is continuously formed by row rolls. Sawing and blanking, through online cut-to-length cutting, the steel pipe blank required for the submerged arc welding process can be obtained, and the steel pipe blank is submerged arc internal welding, submerged arc external welding, internal control inspection, diameter expansion, hydraulic test, mechanical repair End, inspection to get the finished product.
[0013] as attached figure 2 As shown, the process configuration of the present invention, steel coil feeding 1, groove edge milling 2, rough rolling stand 3, roll forming stand 4, finishing rollin...
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The rapid production method of large straight seam submerged arc welded pipes of the present invention belongs to the field of metal plate processing and forming, relates to metal plate bending processing and forming technology, is mainly used for the rapid production of large straight seam submerged arc welded pipes, adopts continuous roll forming of coil materials, and is online High-frequency pre-welding, and then use offline automatic submerged arc welding for internal and external welding of welded pipes, diameter expansion, hydraulic pressure, and non-destructive testing, so as to achieve efficient production of large LSAW pipe products. The present invention adopts the plate coil feeding method, cutting material, shearing butt welding, using edge milling to complete the online processing of plate edge beveling, initial roll forming, roll fine forming, high-frequency pre-welding and sawing of the billet after continuous forming by row rolls Blanking, through online cut-to-length cutting, can obtain the steel pipe blank required by the submerged arc welding process, perform submerged arc internal welding and submerged arc external welding on the steel pipe blank, carry out internal control inspection, diameter expansion, hydraulic test, mechanical repair end, Inspect the finished product. The process design of the present invention is reasonable, and due to the adoption of roll formation and high-frequency pre-welding, the steel pipes have good forming quality and high production efficiency, thereby ensuring the overall production efficiency of the process and reliable weld seam quality.
Description
technical field [0001] The rapid production method of large longitudinal submerged arc welded pipes of the present invention belongs to the field of metal plate processing, relates to metal plate bending and pipe welding processing technology, and is mainly used for the rapid production of large longitudinal submerged arc welded pipes. Background technique [0002] Longitudinal welded pipes include two products: large-diameter longitudinal submerged arc welded pipes and high-frequency longitudinal welded pipes. The production of the two products corresponds to different tube blank forming processes and tube blank welding processes, and there are large differences in production efficiency and weld quality. , In engineering construction, the above two types of products can be customized according to different technical requirements. Therefore, the above two types of products each have their specific market needs. [0003] The production process of large longitudinal submerged...
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IPC IPC(8): B23P23/04B21C37/08B23K9/18B23K9/235B23K33/00
Inventor 陈昌王利树黄克坚冯钊棠黄杰生
Owner PANYU ZHUJIANG STEEL PIPE LIANYUNGANG