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Plasma arc-assisted MIG material increase manufacturing method for aluminum alloy structure

A plasma arc and additive manufacturing technology, applied in the field of 3D printing, can solve the problems of large heat input, wide heat-affected zone, and TIG auxiliary arc is not easy to stabilize, so as to improve the forming quality, improve reliability, and achieve high-quality increase. The effect of material manufacturing and forming

Active Publication Date: 2016-11-09
沈阳钧成材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned technical problems, in order to solve the problems of large heat input, wide heat-affected zone and difficult stability of TIG-assisted arc in the MIG additive manufacturing of aluminum alloy structure, the present invention provides a plasma arc-assisted MIG additive Method of making aluminum alloy structures

Method used

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  • Plasma arc-assisted MIG material increase manufacturing method for aluminum alloy structure

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Effect test

Embodiment 1

[0019] Example 1: Such as figure 1 As shown, the 6061 aluminum alloy substrate 1 is selected as an example, the diameter of the welding wire 2 is 1.2mm, and the relative positional relationship of the aluminum alloy substrate 1, plasma arc nozzle 3 and MIG welding torch 4 is determined: the distance a between plasma arc nozzle and aluminum alloy substrate is 5mm, plasma The distance b between the arc nozzle and the MIG welding gun 4 is 4 mm, the distance between the aluminum alloy substrate and the MIG welding gun 4 is 12 mm; the current of the MIG welding gun 4 is 120 A; the current ratio of the plasma arc to the MIG welding gun 4 is 0.8. During forming, the plasma arc is in front and the MIG welding torch is behind. The plasma arc preheats the aluminum alloy while remelting the aluminum alloy to improve the flatness of the formed surface, and at the same time, it can effectively remove the oxide film and reduce the range of the heat affected zone. The oxide film on the surfac...

Embodiment 2

[0020] Example 2: This example is different from Example 1: In this example, the 6061 aluminum alloy substrate 1 is selected as an example, the diameter of the welding wire 2 is 1.6mm, and the relative positions of the aluminum alloy substrate 1, plasma arc nozzle 3 and MIG welding gun 4 are determined Relationship: the distance a between the plasma arc nozzle 3 and the aluminum alloy substrate 1 is 6mm, the distance b between the plasma arc nozzle 3 and the MIG welding torch 4 is 8mm, and the distance c between the aluminum alloy substrate 1 and the MIG welding torch 4 is 10mm; the current of the MIG welding torch 4 is 160A; plasma The current ratio of arc to MIG welding gun is 0.6.

Embodiment 3

[0021] Example 3: This example is different from Example 1: In this example, the 6061 aluminum alloy substrate 1 is selected as an example, the diameter of the welding wire 2 is 1.4mm, and the relative positions of the aluminum alloy substrate 1, plasma arc nozzle 3 and MIG welding gun 4 are determined Relationship: The distance a between the plasma arc nozzle 3 and the aluminum alloy substrate 1 is 10mm, the distance b between the plasma arc nozzle 3 and the MIG welding torch 4 is 10mm, and the distance c between the aluminum alloy substrate 1 and the MIG welding torch 4 is 15mm; the current of the MIG welding torch 4 is 100A; plasma The current ratio of the arc to the MIG welding gun is 0.4.

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Abstract

The invention discloses a plasma arc-assisted MIG material increase manufacturing method for an aluminum alloy structure, and belongs to the technical field of 3D printing. The method includes the steps that an aluminum alloy substrate is selected at first; then a welding wire with the diameter being 1.2mm-1.6mm is selected; the relative position among a plasma arc nozzle, the aluminum alloy substrate and an MIG welding gun is determined, wherein the spacing range between the plasma arc nozzle and the aluminum alloy substrate is 5mm-10mm, the spacing range between the plasma arc nozzle and the MIG welding gun is 4mm-10mm, and the spacing range between the aluminum alloy substrate and the MIG welding gun is 10mm-15mm; the current range of a plasma arc is 40A-100A; the current range of the MIG welding gun is 100A-160A; and the current ratio range of the plasma arc to the MIG welding gun is 0.4-0.8. By the adoption of the method, stability is high, the heat input amount and heat-affected zone width can be effectively decreased, forming reliability is improved, and high-quality material increase manufacturing forming of the aluminum alloy structure can be facilitated.

Description

Technical field [0001] The invention belongs to the technical field of 3D printing, and particularly relates to a method for plasma arc assisted MIG additive manufacturing of aluminum alloy structures. Background technique [0002] Aluminum alloy has light weight, high specific strength, and strong corrosion resistance. It has been widely used in the structure of parts and components in the petrochemical, transportation, aerospace and other fields. In order to obtain a complex aluminum alloy structure, it is necessary to adopt additive manufacturing methods to achieve aluminum The direct forming of the alloy structure meets the demand for complex aluminum alloy parts. However, the forming process of aluminum alloy is easy to oxidize, and defects such as pores and cracks are prone to occur, which severely limits the application of additive manufacturing technology in the manufacturing process of complex aluminum alloy parts. [0003] At this stage, the methods that can be used for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/02B23K103/10
CPCB23K28/02B23K2103/10
Inventor 那帅崔静萍林静
Owner 沈阳钧成材料科技有限公司
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