Submerged arc automatic fillet welding process and welding equipment used

Abstract

The invention discloses a submerged arc automatic fillet welding process, which comprises the following process steps: after assembling a grooved bulkhead, hoist and turn over, then use a submerged arc welding automatic welding machine to perform flat fillet welding, and install assembly tools respectively during assembly and welding Ensure the included angle with the welding tooling to ensure the angle of the corrugated bulkhead wall plate and prevent welding deformation. The present invention innovatively adopts the method of submerged arc welding and flat fillet welding for large-sized trough bulkheads, which facilitates welding penetration and molten pool entry, effectively reduces the number of welding passes, has good surface forming effects, and small welding deformation of the hull; the welder's welding The labor intensity is greatly reduced, the workload of repairing and grinding of welds is also sharply reduced, the labor cost is reduced, the consumption of welding consumables is low, and the production efficiency is greatly improved.

Description

technical field [0001] The invention relates to a submerged arc automatic fillet welding process and welding tooling used. Background technique [0002] The cargo hold of the sawdust ship has a large volume and deep shape, and the grooved bulkhead is in the form of full penetration fillet welding, which requires a large workload and labor-intensive welding operations; the thickness of the board of the 64000DWT wood chip ship’s grooved bulkhead is 21.5-25mm, and all The fillet welds are all carbon dioxide gas shielded welding. At present, the fillet welds are all manual. A fillet weld on site takes 40 minutes. It belongs to multi-layer multi-pass welding. The diameter of the manual welding wire is 1.2mm, and it takes about 11 passes; The welding deformation is large; the welder's welding labor intensity is high, the repair and grinding workload of the weld seam is also large, the labor cost is high, the consumption of welding materials is still high, and the production effici...

AI Technical Summary

Problems solved by technology

In the welding of ship structure, submerged arc welding is used for flat butt joint in the past, and cannot be used for fillet welding of ships, especially grooved bulkheads. In terms of ship structure welding, fillet welding can only be used for ship-shaped welding, but for groove Type bulkhead requires tooling to support the workpiece into a V shape, which requires high requirements for tooling (the tooling must prevent welding deformation, for such a large-sized workpiece, too large a tooling can hardly guarantee the effect of preventing welding deformation), Moreover, the amount of tooling materials is large, and it is difficult to meet the angle requirements between the side wall plate and the bottom plate of the corrugated bulkhead.

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