Railless walking single-pass full-penetration arc welding equipment and method

Abstract

A single-pass full-fusion arc welding equipment includes metal connecting plate, backing pad, welding wire, welding device, metal fixing plate, guide wheel mechanism and two-rolling supporting wheel mechanisms and driving mechanisms, the metal connecting plate is perpendicularly placed into the preset weld gap of metal to be welded, on the supporting shaft of the described rolling supporting wheel mechanism and guide wheel mechanism three pressure springs are respectively mounted by the action of these springs the metal to be welded and the backing pad and be held in tight contact. This invention is adoptable to the plasma welding and gas shielded welding processes, and is suitable for automatic single-pass welding or manual single-pass welding in large metal plate structures, and its welding quality is high.

Description

technical field [0001] The invention relates to a welding device and method, in particular to an arc welding device and method. Background technique [0002] In the current welding production, in order to ensure the full penetration and welding quality of the butt welds of large metal structural parts, the welding technology of processing groove multi-pass welding is generally used. When arc welding processing conditions permit, welding can also be performed from both sides of the weld. For example, for a butt weld of a 10mm thick steel plate, if gas metal arc welding is used, two or three passes are generally required to ensure the formation and penetration of the front and back welds. For submerged arc welding, if the back liner is not used, usually, the back cover welding is performed by gas metal arc welding first, and then the cover welding is performed by submerged arc welding. Obviously, the production efficiency of this multi-pass weld...

AI Technical Summary

Problems solved by technology

But in practical application, especially for very long welds, it is very difficult to assemble and disassemble the backing pad

Obviously, the production efficiency of this technology is low. In addition, the automatic welding equipment of large metal structural parts generally needs guide rails for welding.

At present, the automatic seam tracking technology is not mature enough, the reliability of the sensor is poor, and the automatic tracking accuracy is low, which affects the quality of welding.

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