Semi-automatic ultra-narrow gap MAG/MIG welding welding gun

Abstract

The invention belongs to the technical field of welding, and relates to a semi-automatic ultra-narrow gap MAG / MIG welding welding gun. The semi-automatic ultra-narrow gap MAG / MIG welding welding gun comprises a transition gun seat, an ultra-narrow gap MAG / MIG welding nozzle connected with the bottom end of the transition gun seat, ultra-narrow gap weld joint tracking devices arranged at the two sides of the ultra-narrow gap MAG / MIG welding nozzle, and ultra-narrow gap groove depth adjusting devices arranged at the two sides of the transition gun seat. In the narrow gap and ultra-narrow gap MAG / MIG welding groove assembling, positioning and welding processes, it is possible that the root of a groove is positioned and welded through the traditional semi-automatic gas shielded welding process. The semi-automatic ultra-narrow gap MAG / MIG welding welding gun can be simultaneously used for welding of irregular narrow gaps and ultra-narrow gap MAG / MIG short weld joints in which full mechanization and full automation are not conveniently adopted; finally, the self-circulating water cooling function is added through the ultra-narrow gap MAG / MIG welding nozzle, so that the semi-automatic ultra-narrow gap MAG / MIG welding welding gun is also used for automatic narrow gap and ultra-narrow gap MAG / MIG welding occasions.

Description

technical field [0001] The invention belongs to the field of welding technology and relates to a semi-automatic ultra-narrow gap MAG / MIG welding torch. Background technique [0002] Narrow-gap MAG / MIG welding and ultra-narrow-gap MAG / MIG welding technology are widely used in industrial production. This technology can be used in industrial production. In addition to the above-mentioned key technologies, it must also be solved in the narrow gap and ultra-narrow gap conditions, and the welding parts can be assembled conveniently and quickly before welding. Due to the substantial reduction in the assembly gap of the weldment groove, the welding groove under this new process is actually a very narrow and deep groove, and the weldment is spot-fixed by semi-automatic welding in the assembly stage before welding. Assembly is extremely infeasible, because the outer diameter of the nozzle of the traditional semi-automatic gas shielded welding torch is much larger than the gap of the ...

AI Technical Summary

Problems solved by technology

Due to the substantial reduction in the assembly gap of the weldment groove, the welding groove under this new process is actually a very narrow and deep groove, and the weldment is spot-fixed by semi-automatic welding in the assembly stage before welding. Assembly is extremely infeasible, because the outer diameter of the nozzle of the traditional semi-automatic gas shielded welding torch is much larger than the gap of the ultra-narrow gap welding groove, so it cannot be inserted into the groove for spot welding; It can be barely tack welded, but the slag is extremely difficult to remove

When some weldments belong to open structures, tack welding can be performed from the reverse side of the narrow gap groove, but for closed box structures, often the main welds are all fillet joints, and the front three square webs and flanges It is not closed during assembly, and tack welding can be performed from the outside or the reverse side of the narrow gap groove, but after the last party (4th party) is assembled, its tack welding can only be done by extending the welding torch from outside the groove to the root of the assembly gap for tack welding, however The existing technology does not have this technology at all, which has led to the fact that so far, there is no precedent for the application of narrow-gap or ultra-narrow-gap MAG / MIG welding technology for the four main welding seams of heavy-duty box structures.

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