Titanium alloy narrow-gap laser welding wire feeding and gas protection integrated mechanism

Abstract

The invention discloses a titanium alloy narrow-gap laser welding wire feeding and gas protection integrated mechanism. The titanium alloy narrow-gap laser welding wire feeding and gas protection integrated mechanism comprises a shell capable of extending into a to-be-welded gap, and the shell is in a hollow cuboid shape; a wire feeding channel smoothly extending from the top wall of the shell tothe lower portion of the right side wall of the shell is obliquely arranged in the shell, and the wire feeding channel can feed a welding wire to the position to be welded at the angle of 15-60 degrees relative to the horizontal plane; and the wire feeding channel divides an inner cavity of the shell into a left cavity and a right cavity which are independent of each other, the left cavity can enable gas for protecting a weld joint introduced into the left cavity to be evenly and stably blown to the weld joint in the vertical direction, and the right cavity can enable gas for protecting a molten pool introduced into the right cavity to be evenly and stably blown to the molten pool at an angle of 0-30 degrees relative to the horizontal plane. By the adoption of the mechanism, the requirements for narrow-gap laser welding alignment wire feeding and welding protection can be met; and meanwhile, plasmas generated in the welding process are effectively blown away, welding power fluctuationcaused by energy dissipation is reduced, and therefore the stability of the welding process is improved.

Description

technical field [0001] The invention relates to the field of narrow-gap laser welding, in particular to a titanium alloy narrow-gap laser welding wire feeding and gas protection integrated mechanism. Background technique [0002] Narrow gap welding means that the thickness of the plate is more than 30mm, and the groove is opened with a gap smaller than the thickness of the plate (when the thickness of the plate is less than 200mm, the gap is less than 20mm; when the thickness of the plate is more than 200mm, the gap is less than 30mm), and then mechanized or automatic arc welding method. The existing narrow-gap arc welding of plates with a thickness of more than 30mm mostly uses a gap of 15-20mm or even wider, and the welding speed is usually 0.12-0.2m / min. Although this narrow-gap welding technology has simple equipment and low cost, it needs to be further improved in terms of welding deformation and the structure and performance of the welding area because the welding spe...

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Problems solved by technology

Therefore, some devices disclosed in the above patents cannot be directly applied to titanium alloy narrow-gap welding. It is necessary to develop a device that can not only ensure the accurate feeding of the welding wire but also ensure effective protection of the welding process and high-temperature welds after welding.

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