Narrow-gap welding gun and preparation method thereof

A narrow gap and welding torch technology, applied in welding equipment, arc welding equipment, manufacturing tools, etc., can solve problems such as poor quality of welded joints, achieve the effect of reducing manufacturing costs and improving protection effects

Active Publication Date: 2019-10-15
YANGJIANG PURUIDE ADDITIVE MFG RES INST CO LTD +2
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Problems solved by technology

[0004] In order to solve the problem of poor quality of welded joints due to the formation of eddy current after the output of shielding gas and the poor quality of welded joints when the conventional narrow-gap welding torch is used for narrow-gap welding operation, the present invention proposes a narrow-gap welding torch

Method used

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  • Narrow-gap welding gun and preparation method thereof
  • Narrow-gap welding gun and preparation method thereof
  • Narrow-gap welding gun and preparation method thereof

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Embodiment Construction

[0037] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0038] combine figure 1 and figure 2 As shown, the narrow-gap welding torch of this embodiment includes a flat-shaped torch body, and the torch body includes a pre-welding unit 1 , a welding unit 2 and a post-welding unit 3 sequentially distributed along the welding direction.

[0039] The pre-welding unit 1 is provided with a first shielding gas channel 11 and a second shielding gas channel 12 for simultaneously introducing pre-weld shielding gas. Wherein, in this embodiment, a common input part is used to introduce the shielding gas before welding, while the first shielding gas passage 11 and the second shielding gas passage 12 are directly used as two output parts of the shielding gas before welding, thus The repeated setting of the same gas channel in the pre-welding unit can be reduced, and the structural design of the...

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Abstract

The invention belongs to the technical field of narrow gap welding. In order to solve the problem that when a conventional narrow-gap welding gun is adopted for narrow gap welding operation, the quality of a welded joint is low due to the fact that the protective gas is prone to generating eddy currents, and air is involved, a narrow-gap welding gun is provided. The narrow-gap welding gun comprises a gun body of a flat plate structure, and the gun body comprises a pre-welding unit, a welding unit and a post-welding unit, wherein the pre-welding unit is provided with a first protective gas channel and a second protective gas channel; the welding channel is provided with a wire feeding channel and a nozzle; the post-welding unit is provided with a third protective gas channel; an outlet of the first protective gas channel is arranged in the pre-welding direction, and an acute angle is formed between the outlet and the vertical direction; an outlet of the second protective gas channel isarranged in the post-welding direction, and an acute angle is formed between the outlet and the vertical direction; and an outlet of the third protective gas channel is arranged in the welded seam direction. Through the narrow-gap welding gun, the situation that the air is involved in a welding area by the protective gas can be effectively avoided, and the quality of a welded joint is ensured.

Description

technical field [0001] The invention belongs to the technical field of narrow-gap welding equipment, and in particular relates to a narrow-gap welding torch and a preparation method thereof. Background technique [0002] Narrow gap welding (NGW) is mainly used in the welding of thick plates. Before welding, the welding joint is not grooved or beveled at a small angle, and a narrow and deep gap is left. The whole weld seam is welded with high efficiency by the method of molten gas shielded welding. Narrow gap welding has the following advantages: a narrower weld can greatly reduce the amount of filler metal and reduce the cost of raw materials; the welding heat input is low, the heat-affected zone is narrow, and the mechanical strength of the welded joint is good; the deformation is small and the residual stress is small , excellent mechanical properties, easy to control the shape; high production efficiency, when the thickness of the plate is 100mm, the production efficienc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173B23K9/28B23P15/00
CPCB23K9/173B23K9/28B23P15/00
Inventor 张瑞华杨天雨屈岳波路超肖梦智栗子林李志慧王志鹏柴旭天邱桥
Owner YANGJIANG PURUIDE ADDITIVE MFG RES INST CO LTD
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