Laser-dipulse MIG (metal-inert gas welding) composite heat source arc AM (additive manufacturing) method for aluminum alloy and workpieces

A composite heat source, additive manufacturing technology

Inactive Publication Date: 2018-12-25
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] According to the above-mentioned technical problems, an aluminum alloy laser-double-pulse MIG compound heat source arc additive manufacturing method and workpiece are provided, which are used to solve the problem of air hole defects that are prone to exist in the existing aluminum alloy additive manufacturing

Method used

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  • Laser-dipulse MIG (metal-inert gas welding) composite heat source arc AM (additive manufacturing) method for aluminum alloy and workpieces
  • Laser-dipulse MIG (metal-inert gas welding) composite heat source arc AM (additive manufacturing) method for aluminum alloy and workpieces
  • Laser-dipulse MIG (metal-inert gas welding) composite heat source arc AM (additive manufacturing) method for aluminum alloy and workpieces

Examples

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Effect test

Embodiment 1

[0055] Aluminum alloy low-power pulse laser-dual pulse MIG composite heat source additive manufacturing of thin-walled wall accumulation. The low-power pulse laser-dual pulse MIG compound heat source additive manufacturing system consists of LWS-500YAG solid-state pulse laser with a maximum output power of 500W, WB-P500L MIG / MAG welding machine and OTC FD-V20 welding robot.

[0056] The welding wire model is ER5356, with a diameter of 1.2mm. The composite method is adopted in which the laser is in front and the arc is in the back. The shielding gas is 98% Ar gas. The test substrate is 300mm×300mm×5mm 5356 aluminum alloy plate, the distance D between the front end of the MIG welding torch and the substrate is 13mm, the angle α between the laser gun and the double-pulse MIG welding torch is 45°, and the angle β between the MIG welding torch and the vertical direction is 25°, distance d of light filaments is 2mm, MIG current is 120A, laser power is 400W, stacking speed is 600mm / m...

Embodiment 2

[0059] Aluminum alloy low-power low-power pulse laser-double pulse MIG composite heat source additive manufacturing of multi-layer and multi-layer physical accumulation. The low-power pulse laser-dual pulse MIG compound heat source additive manufacturing system consists of LWS-500YAG solid-state pulse laser with a maximum output power of 500W, WB-P500L MIG / MAG welding machine and OTC FD-V20 welding robot.

[0060] The welding wire model is ER2219, the diameter is 0.8mm, and the composite method is adopted in which the laser is in front and the arc is in the back, and the shielding gas is 98% Ar gas. The test substrate is made of 300mm×300mm×10mm 2219 aluminum alloy plate, the distance D between the front end of the MIG welding torch and the substrate is 18mm, the angle α between the laser gun and the double-pulse MIG welding torch is 50°, and the angle β between the MIG welding torch and the vertical direction is 15°, the spacing d of light filaments is 4mm, the MIG current is...

Embodiment 3

[0062] Aluminum alloy low-power low-power pulse laser-double pulse MIG composite heat source additive manufacturing single-channel multi-layer wall accumulation. Low-power pulse laser-dual pulse MIG compound heat source additive manufacturing system consists of LWS-1000YAG solid-state pulse laser with a maximum output power of 1000W, WB-P500L MIG / MAG welding machine and OTC FD-V20 welding robot.

[0063] The welding wire model is ER4043, the diameter is 1.6mm, and the composite method is adopted in which the laser is in front and the arc is in the back, and the shielding gas is 98% Ar gas. The test substrate is 300mm×300mm×5mm 4043 aluminum alloy plate, the distance D between the front end of the MIG welding torch and the substrate is 10mm, the angle α between the laser gun and the double-pulse MIG welding torch is 35°, and the angle β between the MIG welding torch and the vertical direction is 30°, the spacing d of light filaments is 1mm, the MIG current is 135A, the laser po...

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Abstract

The invention provides a laser-dipulse MIG (metal-inert gas welding) composite heat source arc AM (additive manufacturing) method for an aluminum alloy and workpieces. According to the method, low-power pulse laser and dipulse MIG arc are adopted as composite heat sources, an aluminum alloy welding wire is molten to perform surfacing on a substrate according to a designated path, surfacing layersare overlapped layer by layer, and a required aluminum alloy structural member is formed. According to the laser-dipulse MIG composite heat source arc AM method for the aluminum alloy and the workpieces, the low-power pulse laser and the dipulse MIG arc are composited, characteristics of two technologies of laser welding and arc welding are achieved, after the laser and the dipulse MIG are composited, pulse laser with high-peak power acts on a molten pool periodically, so that liquid metal in the molten pool is in a circulation of backward flowing-forward refilling, and equivalently, a strongstirring effect is realized; by means of the impact effect of dipulse waveform, the pore defect in a formed sample can be effectively reduced and even eliminated.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing of metal materials, and relates to an aluminum alloy low-power pulse laser-double pulse MIG composite heat source arc additive manufacturing method. Background technique [0002] Aluminum alloy is light in weight, high in specific strength, and strong in corrosion resistance. It has been widely used in the structure of parts and components in petrochemical, transportation, aerospace and other fields. The direct forming of alloy structure meets the demand for complex aluminum alloy parts. However, the aluminum alloy forming process is easy to oxidize, and at the same time, it is easy to produce defects such as pores and cracks, which seriously limits the application of additive manufacturing technology in the manufacturing process of complex aluminum alloy parts. [0003] The methods available for aluminum alloy additive manufacturing at this stage include: laser additive manufactur...

Claims

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Application Information

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IPC IPC(8): B23K26/348B23K26/342
CPCB23K26/342
Inventor 刘黎明张兆栋宋刚王红阳孙承帅曾庆文
Owner DALIAN UNIV OF TECH
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