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Method for guiding ultrahigh-power laser-electric arc welding through low-power laser and application

A laser-guided, low-power technology, applied to laser welding equipment, welding equipment, manufacturing tools, etc., can solve problems such as cost, air holes, undercut, spatter, and low welding efficiency, so as to improve laser absorption efficiency and reduce reflection Or refraction, to ensure the effect of welding quality

Pending Publication Date: 2021-12-14
武汉数字化设计与制造创新中心有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the intense metal vapor generated under the action of the ultra-high power laser will impact the arc, resulting in the unstable combustion of the welding arc
In order to improve the stability of the welding process, the traditional method usually uses preheating before welding, but this method takes a lot of time and the welding efficiency is low
[0004] During the ultra-high power laser-arc hybrid welding process, the plasma energy absorption in the keyhole is unstable, the keyhole vibration caused by the local metal violent evaporation, the violent eruption of metal vapor / plasma has a strong impact on the arc, the molten liquid column rises and Splashes, etc. will cause the welding process to be unstable, and directly affect the quality of weld formation, such as air holes, undercuts, spatter, etc., making it difficult for welding quality to meet industry requirements

Method used

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  • Method for guiding ultrahigh-power laser-electric arc welding through low-power laser and application
  • Method for guiding ultrahigh-power laser-electric arc welding through low-power laser and application
  • Method for guiding ultrahigh-power laser-electric arc welding through low-power laser and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The material of the workpiece to be welded is Q460ME low-alloy high-strength steel. image 3 As shown, an 8° groove is opened, the blunt edge height h is 30mm, the groove platform width w is 1mm, the groove root gap d is 0.7mm, and the THT80-1 welding wire with a diameter of 1.2mm is selected. Before welding, the groove is cleaned and clamped, and the groove platform is fixed by multiple spot welding to prevent welding deformation due to excessive heat input during the welding process, and the gap at the root of the groove is not uniform.

[0044] Preheating and melting the surface of the groove platform by using the front low-power laser beam to form a molten metal layer with a certain depth, so that the ultra-high-power laser in the middle can directly act on the molten metal layer to enhance the laser absorption efficiency and improve the welding process stability. During the implementation process, the power of the low-power laser is 7kw, the included angle with th...

Embodiment 2

[0046] The material of the workpiece to be welded is Q460ME low-alloy high-strength steel, the state of the profile is hot-rolled, the size of the plate is 500*200*30mm, the joint form is narrow gap groove butt joint, open 5° groove, blunt edge height 25mm, groove platform The width is 1mm, the groove root gap is 0.7mm, and the THT80-1 welding wire with a diameter of 1.2mm is selected. Before welding, the groove is cleaned and clamped, and the groove platform is fixed by multiple spot welding to prevent welding deformation due to excessive heat input during the welding process, and the gap at the root of the groove is not uniform.

[0047] Preheating and melting the surface of the groove platform by using the front low-power laser beam to form a molten metal layer with a certain depth, so that the ultra-high-power laser in the middle can directly act on the molten metal layer to enhance the laser absorption efficiency and improve the welding process stability. During the impl...

Embodiment 3

[0049] The workpiece material to be welded is Q460ME low-alloy high-strength steel, the state of the profile is hot-rolled, the specification of the plate is 500*200*40mm, the joint form is a narrow gap groove butt joint, a 15° groove, a blunt edge height of 35mm, and a groove platform The width is 1mm, the groove root gap is 0.7mm, and the THT80-1 welding wire with a diameter of 1.2mm is selected. Before welding, the groove is cleaned and clamped, and the groove platform is fixed by multiple spot welding to prevent welding deformation due to excessive heat input during the welding process, and the gap at the root of the groove is not uniform.

[0050] Preheating and melting the surface of the groove platform by using the front low-power laser beam to form a molten metal layer with a certain depth, so that the ultra-high-power laser in the middle can directly act on the molten metal layer to enhance the laser absorption efficiency and improve the welding process stability. Du...

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Abstract

The invention belongs to the related technical field of welding, and discloses a method for guiding ultrahigh-power laser-electric arc welding through low-power laser and application. The method comprises the steps that in the welding process, welding is conducted in the mode that the low-power laser is in the front, ultrahigh-power laser is in the middle and electric arc is in the rear, wherein the power of the low-power laser is 3-7 kW, and the power of the ultra-high power laser is 20-30 kW. According to the method, the instability phenomenon of a molten pool and a key hole during ultrahigh-power laser welding can be effectively reduced, the stability of the welding process is improved, meanwhile, the welding time is remarkably shortened, and the welding efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field related to welding, and more specifically relates to a method and application of low-power laser-guided ultra-high-power laser-arc welding. Background technique [0002] With the rapid development of heavy industry, there is an urgent demand for the welding of thick plate components in the fields of shipbuilding, hydropower, petrochemical industry, bridge construction and pressure vessels. Ultra-high power laser has ultra-high energy density, which can realize large penetration welding of thick plates. At the same time, combined with the advantages of large spread of arc, ultra-high power laser-arc hybrid welding can realize high-quality and efficient welding of thick plates. [0003] Due to the ultra-high energy density of the 10,000-watt ultra-high-power laser in the welding process, when it directly acts on the surface of the welding material, the material rapidly melts and vaporizes to form a keyhole. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/348B23K33/00
CPCB23K26/348B23K33/004
Inventor 蒋平李艳耿韶宁任良原舒乐时郭玲玉
Owner 武汉数字化设计与制造创新中心有限公司
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