A double-sided symmetrical laser composite wire-filled arc welding method for medium-thick aluminum alloy

An arc welding method and aluminum alloy technology, applied in laser welding equipment, welding equipment, welding/welding/cutting items, etc., can solve the problems of welding limitations and poor adaptability, high welding costs, and difficulties for small and medium-sized enterprises, and achieve The effect of reducing laser power density, improving welding efficiency and reducing welding cost

Active Publication Date: 2021-01-22
沈阳中科煜宸科技有限公司
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Problems solved by technology

At present, vacuum electron beam welding is a common welding method for medium and thick aluminum alloys. Although the welding quality is good, the welding limitations and adaptability are extremely poor, and the welding cost is high, which is unaffordable for small and medium-sized enterprises.

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  • A double-sided symmetrical laser composite wire-filled arc welding method for medium-thick aluminum alloy
  • A double-sided symmetrical laser composite wire-filled arc welding method for medium-thick aluminum alloy
  • A double-sided symmetrical laser composite wire-filled arc welding method for medium-thick aluminum alloy

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Embodiment Construction

[0028] Specific embodiments of the present invention will be described in detail below.

[0029] See attached Figure 1-5 , using the method of the present invention to carry out circular laser wire-filling welding and circular laser-arc composite welding double-sided forming on the asymmetrical X-groove flat plate butt joint of 10mm thick aluminum alloy plates; Angle θ 1 =30°, groove depth h 1 =2mm; ring laser wire filler welding process parameters: laser power 3.7kW, welding speed 1.2m / min, defocusing distance 6mm, wire feeding speed 4m / min, wire spacing 1mm, welding torch tilt angle 30°; ring laser- The hybrid arc welding adopts the back single-pass forming welding process, and the groove angle θ 2 = 45°, groove depth h 2 = 3mm; circular laser-arc hybrid welding process parameters: laser power 3.1kW, welding speed 1m / min, defocus ~ 2mm, light wire spacing 1.5mm, welding current 150A, welding torch inclination angle 30°. All use ER5183 aluminum-magnesium welding wire wi...

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Abstract

The invention provides a medium-thickness plate aluminum alloy double-surface symmetric laser composite wire filling arc welding method. Firstly, the front surface welding is performed through annularlaser wire filling welding; the groove depth is about 2 mm; the groove angle is 30-40 degrees; the welding depth is about 5 mm; meanwhile, the back surface welding is performed through annular laser-arc composite welding; the back surface groove depth is about 3 mm; the groove angle is 45-50 degrees; the welding depth is 6 mm; and finally, the two welding depths are just fused as a seamless complete welding line. The method effectively controls a series of welding defects of easy generation of cracks and air holes and difficult formation in medium-thickness plate aluminum alloys, and meanwhile, solves the problem of insufficient laser power in medium-thickness plate aluminum alloy welding; and in addition, the overburning phenomenon of materials by gauss light spot centers is prevented through annular light spots. The welding method macroscopically improves the welding line formation, and microscopically refines microscopic structures.

Description

technical field [0001] The invention relates to the field of battery pack brackets for new energy vehicles and the technical field of material processing. Specifically, it is a double-sided symmetrical laser composite filling wire arc welding method for medium-thick aluminum alloy. Background technique [0002] Aluminum alloy has become the material of choice for the new energy automobile industry due to its high specific strength and specific stiffness, good corrosion resistance, non-magnetic properties, good electrical and thermal conductivity, and good processing and mechanical properties. With the rapid development of the modern new energy automobile industry, higher requirements are put forward for the strength and comprehensive performance of the aluminum alloy welded joints of medium and thick plates. The structural parts of new energy vehicles are mainly formed by welding, so welding performance is an important process performance index. The following major difficu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/346B23K26/348B23K103/10
CPCB23K26/346B23K26/348
Inventor 张国瑜李午红唱丽丽邱晓杰
Owner 沈阳中科煜宸科技有限公司
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