Angle welding process for automatic submerged-arc welding and welding tool used thereby

Abstract

The invention discloses an angle welding process for automatic submerged-arc welding. The angle welding process comprises the following technological steps: lifting and turning an assembled corrugated bulkhead; and performing flat fillet welding by an automatic submerged-arc welding machine. During assembly and welding, an assembly tool and a welding tool are respectively arranged to guarantee an included angle between wall plates of the corrugated bulkhead and to prevent welding deformation. The submerged-arc welding and flat fillet welding are adopted for the large-sized corrugated bulkhead, the welding penetration and bath entry are facilitated. The number of weld passes is effectively reduced. The surface molding effect is excellent. A ship is low in welding deformation. The welding labor intensity of a welder is greatly reduced. The repairing and grinding workload of weld joints is greatly reduced. The manual cost is cut. The consumption of a weld material is low. 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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