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Ultrasonic assistec laser electric arc composite welding method of aluminum alloy

A laser arc and ultrasonic assisted technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of large heat input of MIG arc, large number of pores in welded joints, large welding deformation, etc., to enhance joint strength and The effect of improving corrosion resistance, weld strength and corrosion resistance, and reducing segregation

Inactive Publication Date: 2016-06-29
北京隆源自动成型系统有限公司
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Problems solved by technology

The disadvantage of this patent is that the biggest problem in the welding of aluminum alloys, that is, the problem of a large number of pores in the welded joints, has not yet been solved.
This patent adopts the combined method of MIG arc and laser to carry out coupled ultrasonic field welding of aluminum alloy, but the heat input of MIG arc is large, and the stability of the welding process is poor, resulting in large welding deformation and fluctuation of molten pool

Method used

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  • Ultrasonic assistec laser electric arc composite welding method of aluminum alloy

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Embodiment 2

[0024] Example 2, first, for the 5052 aluminum alloy plate with a size of 200×200×7, pretreatment is carried out according to the design method of the present invention, and then the 5052 aluminum alloy plate is placed on the auxiliary process equipment, and the 5052 aluminum alloy plate is clamped by using a tightening device. Clamping; then turn on the ultrasonic generator 11, TIG welding machine 5, and laser 1, and adjust the welding process parameters to the required parameters, wherein, the laser power P=4kW, the welding speed v=1.2m / min, the defocus amount △f =-2mm, the current is 140A, the shielding gas is argon, the shielding gas flow q=30L / min, the working frequency of the ultrasonic wave generated by the ultrasonic generator 11 is set to 50kHz, and the pressure of the vibrating head 8 against the weld 7 is maintained at 0.3MPa ; The angle between the tungsten pole and the surface of the seam to be welded is 60° in the TIG arc welding torch 4, the laser incidence direc...

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Abstract

The invention relates to an ultrasonic assisted laser electric arc composite welding method of an aluminum alloy. On the basis of carrying out a welding scheme by combining TIG electric arc welding and laser welding, ultrasonic vibration pressure is introduced into a welding seam, wherein a designed vibration head is in direct contact with the welding seam, so that ultrasonic resources can be more sufficiently utilized, and gas in the welding seam can be rapidly escaped; most of gas in the welding seam is removed so that welding seam gas pore defects are reduced or avoided; tissue crystal grains of the welding seam are remarkably refined by utilizing cavitation effect and acoustic streaming effect caused by the fact that ultrasonic waves are transmitted in liquid, and furthermore, tissue alloy elements of the welding seam are more uniform, segregation is reduced, the strength and corrosion resistance performance of the welding seam are improved, and the performance of a welding connector is improved; and welding residual stress is effectively eliminated or reduced and the strength and corrosion resistance performance of the connector are enhanced, so that the efficient welding of the aluminum alloy is realized.

Description

technical field [0001] The invention relates to an aluminum alloy ultrasonic-assisted laser arc hybrid welding method, which belongs to the technical field of metal welding. Background technique [0002] Aluminum alloy refers to the general term for alloys based on aluminum. The main alloying elements are copper, silicon, magnesium, zinc, manganese, and the secondary alloying elements are nickel, iron, titanium, chromium, lithium, etc. Aluminum alloy has low density, but relatively high strength, which is close to or exceeds high-quality steel. It has good plasticity and can be processed into various profiles. It has excellent electrical conductivity, thermal conductivity and corrosion resistance. It is widely used in industry, and its usage is second only to aluminum alloy. Yu steel. Aluminum alloy is the most widely used non-ferrous metal structural material in industry, and has been widely used in aviation, aerospace, automobile, machinery manufacturing, marine aluminum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/348
CPCB23K26/348B23K2103/10
Inventor 陈俊科徐春丽牛志宇普雄鹰王林
Owner 北京隆源自动成型系统有限公司
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