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Laser-arc hybrid welding protective gas blowing device for expelling laser plasma

A technology of laser plasma and shielding gas, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve problems affecting the stability of arc plasma, and achieve cost and energy saving, improved effect, and good welding effect Effect

Active Publication Date: 2021-12-03
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the shielding gas side blowing method in the prior art will affect the stability of the arc plasma, the present invention provides a shielding gas blowing device for laser-arc hybrid welding that drives away the laser plasma

Method used

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  • Laser-arc hybrid welding protective gas blowing device for expelling laser plasma
  • Laser-arc hybrid welding protective gas blowing device for expelling laser plasma
  • Laser-arc hybrid welding protective gas blowing device for expelling laser plasma

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Embodiment 1

[0040] The invention provides a laser-arc hybrid welding shielding gas blowing device for driving away laser plasma, the blowing device includes a gas rail and a gas cover; the gas rail is L-shaped; the horizontal part of the gas rail is 90° to the vertical part , the horizontal part extends into the gas cover horizontally, and the vertical part is connected with the laser head to play a role in fixing the gas rail. The gas rail is externally connected to a high-pressure gas source. The front part of the gas rail is provided with a through hole matching the round hole; the laser passes through the round hole and the through hole in turn and then penetrates to the bottom of the gas mask; after the arc welding torch passes through the hole Converging with the laser to complete the welding; the front end of the gas rail is provided with a conduit, and the remaining gas in the gas rail is discharged along the conduit. The number of the conduits is 2, and the 2 conduits surround th...

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PUM

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Abstract

The invention relates to the field of laser welding equipment, and discloses a laser-arc hybrid welding protective gas blowing device for expelling laser plasmas. The device comprises a gas rail and a gas cover; the gas rail is externally connected with a gas source, a round hole is formed in the upper portion of the gas cover, an arc welding gun penetrates through the round hole, and a through hole matched with the round hole is formed in the front portion of the gas rail; the laser sequentially penetrates through the round hole and the through hole and then penetrates to the bottom of the gas cover; the arc welding gun penetrates through the arc welding gun penetrating hole and then is converged with laser to complete welding; and a guide pipe is arranged at the front end of the gas rail, and residual gas in the gas rail is discharged along a guide pipe. The device solves the problem that the stability of the arc plasma can be influenced by a protective gas side blowing mode in the prior art, and is convenient to operate and low in cost.

Description

technical field [0001] The invention relates to the field of laser welding equipment, in particular to a laser-arc hybrid welding protective gas blowing device for driving away laser plasma. Background technique [0002] As a welding heat source with extremely high energy density, laser will cause violent evaporation of welding materials. A large amount of metal vapor will be ionized at high temperature to form laser plasma, which is distributed above the laser spot and small holes. Laser plasma is blocked on the path of beam propagation, resulting in reverse bremsstrahlung absorption, reducing the laser energy reaching the base metal, reducing welding penetration, and reducing the stability of the welding process. In the laser arc welding of thick plates, due to the higher energy of the laser beam, it often leads to extremely strong photoinduced plasma eruption, which further affects the stability of the welding process and greatly reduces the energy utilization rate. In a...

Claims

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Application Information

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IPC IPC(8): B23K26/348B23K26/14B23K26/70
CPCB23K26/348B23K26/14B23K26/702
Inventor 周晓辉檀财旺吴来军陈波宋晓国冯吉才
Owner HARBIN INST OF TECH AT WEIHAI