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Laser-enhanced underwater GMAW droplet transfer control method

A droplet transfer and control method technology, applied in laser welding equipment, manufacturing tools, welding equipment, etc., can solve the problems of underwater welding process stability and weld quality to be improved, so as to improve stability and weld quality , Uniform droplet size and stable arc

Active Publication Date: 2015-04-29
北京三帝科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the above-mentioned methods can achieve a certain degree of droplet transfer control in GMAW welding, their control is limited to a certain current range, and the current is still the main factor affecting the droplet transfer. Seam quality still needs to be improved

Method used

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Embodiment

[0022] An embodiment of the present invention provides a laser-enhanced underwater GMAW droplet transfer control method, the method mainly includes the following steps:

[0023] Put the melting electrode welding torch inside the underwater welding device, and the laser is placed outside or inside the underwater welding device;

[0024] The laser beam emitted by the laser is introduced into the GMAW welding droplet transition constriction inside the underwater welding device, and the laser beam forms a certain angle with the melting electrode welding torch and is arranged in a straight line along the welding direction.

[0025] During the welding process, the recoil force generated by the laser beam weakens the adverse effect of the surrounding pressure environment on the droplet transfer, promotes the formation of the droplet transfer, and can pass the incident angle of the laser beam, laser power, pulse frequency, and defocus The adjustment of parameters such as the spot diam...

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Abstract

The invention discloses a laser-enhanced underwater GMAW droplet transfer control method. The method comprises the steps: placing a fusion electrode welding torch inside an underwater welding device, and placing a laser outside or inside the underwater welding device; leading a laser beam emitted by the laser into a GMAW welding droplet transfer necking position inside the underwater welding device, ensuring the laser beam and the fusion electrode welding torch to form an angle and to be arranged on the same straight line along the welding direction. By adopting the method, the orientated jet transfer state with stable arc and uniform droplet under the low welding current condition can be realized, the underwater welding droplet transfer time can be precisely controlled, the fusion penetration of a weld seam and the appearance shape of a weld pool can be controlled by freely selecting current under a wider condition, and the good weld seam formation can be realized on the premise of not obviously increasing the additional heat input.

Description

technical field [0001] The invention relates to the technical field of underwater welding engineering, in particular to a laser-enhanced underwater GMAW droplet transfer control method. Background technique [0002] Offshore oil and gas development and nuclear power construction are the main directions of China's energy development at present. The repair of submarine pipelines and internal facilities of nuclear power plants urgently needs advanced underwater welding technology as support. GMAW (Gas Metal Arc Welding) welding has the advantages of high efficiency and easy automation. It is very beneficial for underwater repairs in emergency situations, complex environments, and expensive operations. However, it is significantly affected by the underwater environment. The process stability is poor, so the current research and application are greatly limited. [0003] Droplet transfer is the basic physical phenomenon of GMAW. Stable droplet transfer is the prerequisite for obt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/122B23K26/348
CPCB23K26/348
Inventor 朱加雷马正住周灿丰焦向东李卫强石庭深王纪兵冯艳鹏贾存锋
Owner 北京三帝科技股份有限公司
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