Abstract
Automatic welding technology is a solution to increase welding productivity and improve welding quality in offshore pipe welding. To increase welding productivity, it is necessary to save time during the assembly/disassembly of the guide track from the welding carriage and pipe to move the next station. The guide track consists of a pneumatic system that does not separate the welding carriage, and two welding carriages operate on a half-pipe joint to increase productivity. These welding carriages automatically operate under the controller command. An automatic welding system consists of a DC motor module, a step motor module, a welding control module, a welding monitoring module, and a central control module. The control systems incorporate control modules and transmit commands to each module for an automatic welding system. In order to minimize the inevitable misalignment between the centerline of the welding seam and the welding torch for each welding pass, a moving average algorithm for seam tracking is proposed, which was proven to be suitable for the root pass, filling pass, and cap pass. Welding experiments were also carried out to verify the validity of the weld seam tracking system.
Highlights
An automatic welding system has the advantages of low labor intensity, good welded joint appearance, and high-speed welding in the offshore pipeline industry [1,2,3,4,5,6]
This study has developed an advanced automatic welding system that increases productivity and saves time using a pneumatic system
The automatic welding system consists of welding machines,The welding controller, and guide trackThe thatautomatic performswelding the motion needed to of weld the carriages
Summary
An automatic welding system has the advantages of low labor intensity, good welded joint appearance, and high-speed welding in the offshore pipeline industry [1,2,3,4,5,6]. Automatic welding removes the human element, except as an overall observer to make sure the machines are running properly In these set-ups, the parts and finished workpieces are moved by other machines, such as conveyor belts, and the welding operation is continuous over a large number of individual pieces. Competitiveness of offshore laying, is narrow groove welding, the welding system automatic seam tracking, and an necessary to maintain production balance amongincorporates the welding an processes, minimize the work process without intervention is essential compensate the fit-up condition.on. Since the workfor process is performed a barge floating on welding systemsconditions incorporate welding processes increase production, but to multiple arc the sea, working aretandem more difficult than those on to land It is difficult accurately behavior it automated difficult to pieces observe weld centerline, so an automatic tracking system is obtain themakes various of the equipment used in pipeline work dueseam to their high cost. The guide track with a pneumatic system is an integral part of the welding carriage as it automatically connects the pipe joints
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