Laser high-frequency alternating-current pulse tungsten inert gas (TIG) hybrid welding process

A high-frequency AC and composite welding technology, which is applied in laser welding equipment, welding equipment, welding/welding/cutting items, etc., can solve the problems of high laser reflectivity, poor joint performance, unstable welding quality, etc., and achieve laser power Not too high, the elongation rate is improved, and the structure is simple

Inactive Publication Date: 2013-07-10
SICHUAN AEROSPACE LONG MARCH EQUIP MFG CO LTD
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Problems solved by technology

However, the use of laser welding for aerospace high-strength aluminum alloys (such as 2A14, 2219, etc.) has great lim

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  • Laser high-frequency alternating-current pulse tungsten inert gas (TIG) hybrid welding process
  • Laser high-frequency alternating-current pulse tungsten inert gas (TIG) hybrid welding process
  • Laser high-frequency alternating-current pulse tungsten inert gas (TIG) hybrid welding process

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Embodiment Construction

[0035] As an embodiment of the present invention, such as figure 1 As shown, a laser high-frequency AC pulse TIG composite welding process, the specific steps include: first build a laser high-frequency AC pulse TIG composite welding system, the laser high-frequency AC pulse TIG composite welding system includes a semiconductor laser 1, a high-frequency pulse Coupler 2, variable polarity TIG power supply 3, shielding gas 4, wire feeding mechanism 5, TIG welding torch 6 and laser welding head 7, the high-frequency pulse coupler 2 is connected in parallel with variable polarity TIG power supply 3, synchronized by a current sensor , which can combine high-frequency pulse energy at the moment of EN. Such as figure 2 The waveform schematic diagram shown, the main technical parameters welding power frequency F1 frequency range: 20-100Hz (adjusted on the polarity-changing TIG power supply); high-frequency pulse frequency F2 frequency range: 10-30kHz (adjusted on the high-frequency ...

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Abstract

The invention discloses a laser high-frequency alternating-current pulse tungsten inert gas (TIG) hybrid welding process. The process comprises the following steps of: constructing a laser high-frequency alternating-current pulse TIG hybrid welding system, and gathering an TIG arc and a semiconductor laser beam on the same welding position of a welded workpiece 8 in the same welding direction, to form a molten bath, wherein an inclined angle alpha of 10-40 degrees is formed between the TIG arc tungsten electrode tip end and a vertical direction, the semiconductor laser beam forms an included angle beta of 10-30 degrees with the vertical direction, the TIG arc tungsten electrode tip end keeps a vertical distance H of 2-4mm with the surface of the welded workpiece 8, and the TIG arc tungsten electrode tip end and the semiconductor laser beam keep a horizontal distance D of 2-5mm with an action point of the surface of the welded workpiece 8. The process disclosed by the invention can refine weld microstructure, remarkably reduce or eliminate pores in melting area and effectively improve mechanical performance and anti-stress corrosion performance of a high-strength aluminous alloy welding joint, and the process is quite practical.

Description

technical field [0001] The invention relates to a laser high-frequency composite welding process, in particular to a laser high-frequency AC pulse TIG composite welding process. Background technique [0002] 2A14 and 2219 aluminum alloys are the main structural materials of my country's aerospace products. As one of the core technologies of aerospace manufacturing, their welding processes and methods need continuous breakthroughs and improvements with the continuous improvement of product performance and requirements and the development of material technology. [0003] At present, most of the large structures of 2A14 and 2219 aluminum alloys still adopt the traditional TIG welding process, and some structural welds adopt more advanced special welding processes such as friction stir welding, variable polarity plasma welding, and vacuum electron beam welding. However, due to the limitation of product structure and welding position, there are still a large number of welds that...

Claims

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Application Information

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IPC IPC(8): B23K28/02B23K103/10B23K26/348
Inventor 张万春宋永伦罗传光
Owner SICHUAN AEROSPACE LONG MARCH EQUIP MFG CO LTD
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