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5083 aluminum alloy laser welding process method

A process method and laser welding technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problem of large heat input, achieve the effect of small heat input, overcome large heat input, and reduce temperature gradient

Active Publication Date: 2019-05-17
DALIAN UNIV OF TECH
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Problems solved by technology

[0007] In the above studies, the continuous laser is used as the heat source, and the continuous laser is prone to large heat input.

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  • 5083 aluminum alloy laser welding process method

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Embodiment Construction

[0024] The specific implementation manner of the present invention will be further described below in conjunction with the accompanying drawings.

[0025] A 5083 aluminum alloy laser welding process, the welding method is realized based on the following structure, the pretreated 5083 aluminum alloy workpiece 1 is fixed on the preheated substrate 2, the angle between the pulse laser 4 and the vertical direction is adjusted to 5°, and the protection The air nozzle 5 has an included angle of 45° with the vertical direction, and the temperature controller 3 is turned on and adjusted to a certain temperature.

[0026] Specific steps are as follows:

[0027] S1: Before welding, use 600# sandpaper to remove the oxide skin within 30mm around the 5083 aluminum alloy butt weld until the metal luster is exposed around the weld, then wipe it with acetone and dry it.

[0028] S2: Fix the surface-treated 5083 aluminum alloy on the preheated substrate. Turn on the temperature controller an...

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Abstract

The invention discloses a 5083 aluminum alloy laser welding process method, and belongs to the technical field of welding. According to the method, pulse laser is used as a heat source, welding of the5083 aluminum alloy is realized by adopting a mode that laser is symmetrically swing along the two sides of a weld joint. The method comprises the following steps of firstly, removing oxide films onthe two sides of the 5083 aluminum alloy weld joint before welding; secondly, arranging a pulsed laser and a protective gas nozzle above the 5083 aluminum alloy, wherein the protective gas nozzle is used for blowing inert gas to the front side of the weld joint, and preheating the 5083 aluminum alloy by adopting a preheating device; finally adjusting the average power of the laser, the pulse frequency, the swing amplitude and the swing frequency to achieve 5083 aluminum alloy welding after heating to a preset temperature. According to the 5083 aluminum alloy laser welding process method, the conditions of low production rate and large heat affected area of a traditional aluminum alloy processing method can be improved, and the defects that a continuous laser processing aluminum alloy is large in heat input and poor in forming quality can be overcome. The method has the advantages that the defects of pores, cracks and the like can be effectively improved.

Description

technical field [0001] The invention belongs to the field of welding technology, and relates to a laser welding process method of 5083 aluminum alloy. Background technique [0002] 5083 aluminum alloy is a typical aluminum-magnesium alloy, which is a medium-strength aluminum alloy that cannot be strengthened by heat treatment. The aluminum alloy has excellent corrosion resistance, good processability and low temperature performance, and is widely used in industrial fields such as ships, ships, automobiles and aircraft plate weldments. [0003] At present, the 5083 aluminum alloy is mainly welded by tungsten inert gas shielded welding / melting inert gas shielded welding (TIG / MIG). Although effective connection can be achieved, warping, deformation and deformation are prone to occur due to the large heat input in the welding process. Problems such as joint softening must be repaired after welding, resulting in low productivity. Compared with traditional arc welding, laser wel...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/21B23K26/24B23K26/60
Inventor 马广义唐博凯刘德华刘俊吴东江
Owner DALIAN UNIV OF TECH
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