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Ultrasonic field coupled laser-MIG common welding pool aluminum alloy welding technology

A welding technology and ultrasonic coupling technology are applied in the field of aluminum alloy laser-MIG hybrid welding technology to achieve the effect of eliminating pores and improving microstructure and properties.

Active Publication Date: 2015-07-22
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, despite the above-mentioned suppressio

Method used

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  • Ultrasonic field coupled laser-MIG common welding pool aluminum alloy welding technology
  • Ultrasonic field coupled laser-MIG common welding pool aluminum alloy welding technology
  • Ultrasonic field coupled laser-MIG common welding pool aluminum alloy welding technology

Examples

Experimental program
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Effect test

Embodiment 1

[0019] combine figure 1 : In the figure 1. Backing plate, 2. Laser generator, 3. Welding pool, 4. Operating optical fiber, 5. Laser welding head, 6. Aluminum alloy butt test plate, 7. Welding power supply, 8. MIG welding torch, 9 . Ultrasonic generator, 10. Ultrasonic vibration head.

[0020] Taking the mechanical vibration ultrasonic field coupling laser-MIG eutectic pool aluminum alloy welding technology as an example, place an aluminum alloy butt test plate 6 to be welded on the backing plate 1, the material is A7N01 plate, and the positive electrode of the welding power supply 7 passes through the MIG welding torch 8 The welding wire is connected, and the negative electrode of the welding power supply 7 is connected with the backing plate 1. After arcing, the arc heats the aluminum alloy butt joint test plate 6 to form a welding pool 3. At the same time, the laser light emitted by the laser generator 2 is transmitted to the laser welding head 5 through the operating optic...

Embodiment 2

[0022] combine figure 2 , in the figure 1. Backing plate, 2. Laser generator, 3. Welding pool, 4. Operating optical fiber, 5. Laser welding head, 6. Aluminum alloy butt test plate, 7. Welding power supply, 8. MIG welding torch, 9 . Ultrasonic frequency pulse power supply.

[0023] Taking the ultrasonic arc coupled laser-MIG eutectic pool aluminum alloy welding technology as an example, an aluminum alloy butt test plate 6 is placed on the backing plate 1, the positive electrode of the welding power supply 7 is connected to the welding wire of the MIG welding gun 8, the negative electrode of the welding power supply 7 is connected to the ultrasonic frequency The pulse power supply 9 is connected, and the negative pole of the ultrasonic frequency pulse power supply 9 is connected to the backing plate 1. During welding, since an ultrasonic frequency pulse power supply 9 is superimposed on the traditional MIG welding welding power supply 7, the ultrasonic frequency pulse power sup...

Embodiment 3

[0025] combine image 3 , in the figure 1. Backing plate, 2. Laser generator, 3. Welding pool, 4. Operating optical fiber, 5. Laser welding head, 6. Aluminum alloy butt test plate, 7. Welding power supply, 8. Ultrasonic-MIG composite Welding gun, 9. Ultrasonic transmitter.

[0026] Taking the ultrasonic composite welding torch coupling laser-MIG eutectic pool aluminum alloy welding technology as an example, the aluminum alloy butt test plate 6 to be welded is placed on the backing plate 1, and the positive electrode of the welding power supply 7 is connected to the welding wire in the ultrasonic-MIG composite welding torch 8 , the negative pole of the welding power supply 7 is connected to the backing plate 1. The ultrasonic transmitter 9 is connected with the ultrasonic transducer in the ultrasonic-MIG composite welding torch 8, through the piezoelectric conversion of the transducer, the electric energy is converted into ultrasonic vibration, and transmitted to the The end ...

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Abstract

The invention discloses an ultrasonic field coupled laser-MIG common welding pool aluminum alloy welding technology. Ultrasonic vibration is coupled in a laser-MIG composite welding pool. The number of ultrasonic coupling modes is three: the first mode refers to the fact that ultrasonic vibration is applied to a workpiece or a welding base plate, and ultrasound is transmitted to a welding pool through mechanical vibration of the workpiece or the base plate; the second mode refers to the fact that a pulse power with an ultrasonic frequency is overlapped on an MIG welding power through arc coupling ultrasound, the connected and disconnected moment of each pulse excites arc ultrasound, and finally the ultrasound is acted to the welding pool, or an ultrasonic-MIG composite welding gun is adopted to perform coupling ultrasound to the welding arc, and then the coupling ultrasound is transmitted to the welding pool; the third mode refers to the fact that another path of pulse laser is adopted to irradiate the welding pool to modulate coupling ultrasound. By the adoption of the method, aluminum alloy laser-MIG composite welding joint pores can be reduced or eliminated, and the structure property of the welding joint can be improved.

Description

technical field [0001] The invention belongs to the field of laser processing and relates to an aluminum alloy laser-MIG composite welding technology assisted by ultrasound. Background technique [0002] Aluminum alloy materials have the advantages of low density, high specific strength, corrosion resistance and good formability, etc., and have broad application prospects in aviation, aerospace, rail transit, shipbuilding and nuclear industries, especially during the "Eleventh Five-Year Plan" period With the rapid development of my country's high-speed railways, the amount of aluminum alloys used in hydrogenated high-speed trains has also increased dramatically. The connection of aluminum alloy is a very important process link in the practical application of aluminum alloy components. Due to the unique physical and chemical characteristics of aluminum alloy, such as large thermal conductivity, large thermal expansion coefficient, easy formation of oxide film on the surface, l...

Claims

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Application Information

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IPC IPC(8): B23K26/348B23K26/70
CPCB23K26/348
Inventor 朱宗涛陈辉李远星苟国庆
Owner SOUTHWEST JIAOTONG UNIV
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