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Ultrahigh-power laser and hollow tungsten electrode hybrid welding method based on magnetic rotation control technology

A hybrid welding and tungsten pole technology, which is applied in the field of composite welding of ultra-high power laser and hollow tungsten pole based on magnetic spin control technology, can solve the problems of difficult control of forming, promotion of ultra-high power laser welding technology, application influence, spatter, etc.

Pending Publication Date: 2021-05-11
HARBIN WELDING INST LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] With the increasing demand for medium and thick plate components in the fields of large ships, nuclear power, oil pipelines and boiler manufacturing in my country, the existing welding technology has been difficult to meet the needs of high-efficiency and high-quality welding technology. On the other hand, with the high-power optical fiber With the rapid development of lasers, 10,000-watt-class ultra-high power laser welding technology has become one of the most important development directions for welding medium and thick plates. The welding process is extremely unstable, prone to welding problems such as pores, cracks, splashes, and difficult to control forming
At the same time, under the interference of keyhole jets such as violent plasma plumes and metal vapors, the conversion efficiency of laser power to penetration is much lower than that of kilowatt-level laser welding. These shortcomings will hinder the promotion of ultra-high power laser welding technology. , the application has a serious impact on

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  • Ultrahigh-power laser and hollow tungsten electrode hybrid welding method based on magnetic rotation control technology

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Effect test

Embodiment 1

[0020] A composite welding method of ultra-high power laser and hollow tungsten pole based on magnetic spin control technology. The laser beam 3 is provided with an annular inductance coil or a permanent magnet 2 above the welding test plate 6, and the inductance coil or permanent magnet forms a longitudinal magnetic field with the arc 4 at the bottom of the hollow tungsten pole, and the laser beam passes through the Arc and molten pool 5, the longitudinal magnetic field can orientate the rotating arc to form a rotating arc and laser beam to act on the welding spot area together. There is a negative pressure effect in the tungsten electrode discharge area, causing the other end of the hollow tungsten electrode to directly inhale air and conduct it to the solder joint area to affect the welding quality;

[0021] Described composite welding method comprises the steps:

[0022] Firstly, the longitudinal magnetic field is directly above the welding spot and is located around the ...

Embodiment 2

[0028] According to the ultra-high power laser and hollow tungsten composite welding method based on magnetic spin control technology described in Example 1, when the laser beam is recombined with the hollow tungsten arc under the action of the longitudinal magnetic field, the welding temperature is above 300A When the electric current occurs, the combination of the ultra-high power laser beam and the overall bell-shaped directional rotating arc occurs, and when the welding current is below 300A, the combination of the ultra-high power laser beam and the local directional deflection arc occurs; due to the difference between the two compound forms , so there will be some differences in the magnetic spin control process parameters.

Embodiment 3

[0030] According to the ultra-high power laser and hollow tungsten composite welding method based on magnetic spin control technology described in Example 2, the magnetic induction intensity range of the longitudinal magnetic field is 0.05~2 Tesla, and the hollow tungsten argon arc The average welding current output range is 100~630A. According to the special requirements of different welding materials and processes, the current range can be appropriately expanded. The inner diameter of the hollow tungsten electrode is 3~6mm, and the outer diameter is 6~10mm. The laser beam power range 0~30kW;

[0031]If the longitudinal magnetic field is realized by magnetic core inductance coils, the parameters of the magnetic field strength can be gradually adjusted according to the actual follow-up of the molten metal pool to the rotating arc during composite welding, and the orientation of the molten pool can be rapidly and stably improved. Rotation speed, to achieve the purpose of stable...

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Abstract

The invention discloses an ultrahigh-power laser and hollow tungsten electrode hybrid welding method based on a magnetic rotation control technology. At present, in ultrahigh-power laser medium and thick plate welding, the welding process is extremely unstable due to the too violent heat energy conversion effect, and the welding problems that air holes and splashing easily occur, forming is difficult to control and the like are solved. The method is characterized in that a hollow tungsten electrode (1) is included, ultrahigh-power laser penetrates through a center hole of the hollow tungsten electrode to form a coaxial composite laser beam (3), an annular inductance coil or permanent magnet (2) is arranged above a welding test plate (6), the inductance coil or permanent magnet and an electric arc (4) at the bottom of the hollow tungsten electrode form a longitudinal magnetic field, the laser beam penetrates through the electric arc and a molten pool (5), the longitudinal magnetic field can directionally rotate the electric arc, and the rotating electric arc and the laser beam are formed to be combined and jointly act on a welding spot area. The ultrahigh-power laser and hollow tungsten electrode hybrid welding method based on the magnetic rotation control technology is provided.

Description

technical field [0001] The invention relates to the technical field of ultra-high power laser-hollow tungsten electrode-longitudinal magnetic field composite welding, in particular to a method for composite welding of ultra-high power laser and hollow tungsten electrode based on magnetic spin control technology. Background technique [0002] With the increasing demand for medium and thick plate components in the fields of large ships, nuclear power, oil pipelines and boiler manufacturing in my country, the existing welding technology has been difficult to meet the needs of high-efficiency and high-quality welding technology. On the other hand, with the high-power optical fiber With the rapid development of lasers, the 10,000-watt ultra-high power laser welding technology has become one of the most important development directions for the welding of medium and thick plates. The welding process is extremely unstable, and welding problems such as pores, cracks, splashes, and diff...

Claims

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Application Information

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IPC IPC(8): B23K26/348B23K26/60B23K26/70
CPCB23K26/348B23K26/60B23K26/70
Inventor 孙谦黄瑞生陈健杨义成方迪生梁晓梅曹浩蒋宝聂鑫刘孔丰
Owner HARBIN WELDING INST LTD
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