Ultrahigh-power double-beam laser-high-frequency pulse deep penetration TIG composite welding method for thick plate

A high-frequency pulse, composite welding technology, applied in the direction of laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of serious porosity and crack tendency, thick weld structure, large heat-affected zone, etc., and achieve welding spatter Small size, few welding defects, large effect area

Active Publication Date: 2022-01-18
HARBIN WELDING INST LTD
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Problems solved by technology

[0006] The present invention aims to solve the technical problem of serious porosity and crack tendency in the existing ultra-high power laser-deep penetration TIG composite welding process, and at the same time improve the large heat input of deep penetration TIG resulting in coarse weld structure, large heat-affected zone and serious welding deformation, etc. However, it provides a method for ultra-high power double-beam laser-high-frequency pulse deep penetration TIG hybrid welding of thick plates

Method used

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  • Ultrahigh-power double-beam laser-high-frequency pulse deep penetration TIG composite welding method for thick plate
  • Ultrahigh-power double-beam laser-high-frequency pulse deep penetration TIG composite welding method for thick plate
  • Ultrahigh-power double-beam laser-high-frequency pulse deep penetration TIG composite welding method for thick plate

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Embodiment 1

[0038] Embodiment 1 (see figure 1 a): In this embodiment, a double-beam laser-high-frequency pulse deep-penetration TIG composite welding method for thick plates is carried out according to the following steps:

[0039] S1: Grind the groove and surface of the thick plate to be welded (low carbon steel plate of 300mm×150mm×40mm), and then set the thick plate to be welded into a butt joint and fix it;

[0040] S2: Set the angle of the laser head and TIG welding torch, the angle between the laser head and the normal direction of the surface of the thick plate to be welded is 15°, the angle between the laser head and the TIG welding torch is 30°, and the distance between the tip of the TIG welding torch and the tungsten electrode to be welded is thick The distance between the midpoints of the centerlines of the two laser spots on the surface of the plate workpiece is 1.5mm;

[0041]S3: Set the parameters of ultra-high-power dual-beam laser-high-frequency pulse deep-penetration TI...

Embodiment 2

[0044] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the total output power of the double-beam laser is 20KW, and the power ratio of the double-beam laser is 1:1. Other steps and parameters are the same as in Example 1.

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Abstract

The invention discloses an ultrahigh-power double-beam laser-high-frequency pulse deep penetration TIG composite welding method for a thick plate. The method belongs to the field of welding. The method aims to solve the technical problem of serious tendency of air holes and cracks in conventional ultrahigh-power laser-deep penetration TIG composite welding. The method comprises the steps that S1, a groove and a to-be-welded surface are polished or cleaned, and a butt joint is formed and fixed; S2, angles of a laser head and a TIG welding gun are set, and the distance between the tip end of a TIG welding gun tungsten electrode and a midpoint of a connecting line of centers of two laser spots on the surface of a to-be-welded thick plate is set; S3, parameters of the ultrahigh-power double-beam laser-high-frequency pulse penetration fusion TIG composite welding are set; S4, protective gas is set; and S5, the protective gas is introduced, and the ultrahigh-power double-beam laser-high-frequency pulse penetration fusion TIG composite welding is synchronously carried out. The method can inhibit weld pores and cracks and improve the welding quality.

Description

technical field [0001] The invention belongs to the field of welding, and in particular relates to a method for composite welding of ultra-high-power double-beam laser-high-frequency pulse deep penetration TIG for thick plates. Background technique [0002] Laser-traditional TIG arc hybrid welding solves the problems of low energy utilization rate and high requirements for assembly clearance during single laser welding, increases welding penetration, reduces energy consumption, and improves joint quality. It is used in aerospace, vehicle engineering, It is widely used in shipbuilding and other fields. However, the penetration of traditional TIG arc welding is small, so this process is mainly aimed at welding medium and thin plates. Laser-deep penetration TIG hybrid welding technology is a new type of laser-arc hybrid welding technology, in which deep penetration TIG refers to a kind of traditional TIG, which uses water-cooled tungsten to generate cathode shrinkage and coope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/348
CPCB23K26/348
Inventor 方迪生黄瑞生曹浩韩鹏博邹吉鹏滕彬梁晓梅孙谦方乃文杨义成
Owner HARBIN WELDING INST LTD
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