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Narrow gap laser-arc hybrid welding method using filler wire

A technology of filler wire and composite welding, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of the joint quality is difficult to meet the requirements of use, the stability of the welding process is difficult to guarantee, and the arc stability is affected. Assembly requirements, low welding costs, and the effect of increasing bridging capacity

Inactive Publication Date: 2009-07-08
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But its disadvantage is that the droplet transfer during welding affects the stability of the arc, the stability of the welding process is difficult to guarantee, and there are even a large number of pores, and the quality of the joint is not high
In this case, the arc adversely affects the laser beam, resulting in a limited welding depth, with a single pass thickness not exceeding 8mm
For welding structures with a thickness exceeding 8mm, laser-MIG / MAG hybrid welding requires multi-layer welding, the welding process will become very complicated, and the quality of the joints is difficult to meet the requirements of use

Method used

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  • Narrow gap laser-arc hybrid welding method using filler wire
  • Narrow gap laser-arc hybrid welding method using filler wire
  • Narrow gap laser-arc hybrid welding method using filler wire

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with accompanying drawing:

[0020] For the technical solution of this embodiment, refer to the appended figure 1 , Before welding, the workpiece is pre-grooved 2. During welding, the laser beam 4 and the welding wire 9 are longitudinally arranged symmetrically with respect to the TIG arc 8 , and the arc 8 is perpendicular to the surface of the workpiece 1 . The angle between the laser beam 4 and the surface of the workpiece 1 is 45°, and it is obliquely incident from the front of the arc 8 . The welding wire 9 is fed into the groove gap 2 from the rear of the arc 8, and the composite heat source composed of the laser beam 4 and the electric arc 8 melts the welding wire and fills the groove 2 to realize the single-pass welding of the workpiece 1.

[0021] In this embodiment, the workpiece is a stainless steel plate with a thickness of 10 mm, the shape of the groove 2 is a U-shaped groove with a blunt...

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Abstract

The invention relates to a narrow gap laser-arc composite welding method adopting a filler wire, belonging to the technical field of laser materials processing. The method adopts a high-power laser and an laser arc hybrid, and the arrangement mode thereof is that a laser bean and a welding wire are arranged in opposite directions corresponding to an electric arc, wherein the laser bean enters slantwise from the front part of the electric arc, and the welding wire is led into a divided edge gap from the rear of the electric arc, and after fusing the welding wire, a composite thermal source fills the gap, thereby realizing the single pass welding shaping of a work piece. The method fully utilizes the penetration fusion property of the laser and the high filling efficiency of the electric arc; and under the mutual actions of laser and arc, the stability of a welding process is improved, and the welding efficiency is increased.

Description

technical field [0001] The invention discloses a narrow-gap laser-arc composite welding method using filler wire, which belongs to the technical field of laser material processing. Background technique [0002] With the increasingly large-scale and high-parameterization of transportation, energy, nuclear power, aviation, aerospace and other industrial equipment, the application of thick (ultra-thick) plate welding structures is becoming more and more extensive, and more and more requirements are put forward for welding deformation and joint quality. higher requirements. [0003] Non-melting inert gas welding (GTAW), melting inert / active gas shielded welding (GMAW), submerged arc welding (SAW) and other processes currently used in thick plate welding require a larger opening when welding large thick plates Groove, many welding passes, wide welding heat-affected zone, large welding residual stress, large welding deformation, low welding efficiency, etc., limit the application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/02B23K26/348
Inventor 肖荣诗吴世凯杨武雄陈铠
Owner BEIJING UNIV OF TECH
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