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Vibrating welding method of laser scanning-TIG compound molten bath

A technology of laser scanning and welding method, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of restricting the accessibility of welding guns, large gun heads, etc., to improve the solidification and crystallization process, increase the penetration depth, stir Form flexible effects

Inactive Publication Date: 2017-12-22
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the need for additional auxiliary devices, the torch head part is often large, which often limits the accessibility of the welding torch to a certain extent

Method used

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  • Vibrating welding method of laser scanning-TIG compound molten bath
  • Vibrating welding method of laser scanning-TIG compound molten bath
  • Vibrating welding method of laser scanning-TIG compound molten bath

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Embodiment Construction

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments.

[0027] A laser scanning-TIG composite molten pool oscillation welding method, which is realized by combining laser scanning and TIG welding, is characterized in that it includes:

[0028] When welding, choose the laser scanning groove in front, TIG torch welding behind, or TIG welding torch welding in front, laser scanning groove behind two composite welding methods, and the trajectory of the laser scanning molten pool depends on different materials and welding Different methods are required, the range of laser scanning on both sides of the groove i...

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Abstract

The invention discloses a vibrating welding method of a laser scanning-TIG compound molten bath. The method is implemented by compounding laser scanning and TIG welding. According to the method, during welding, two compound welding modes of performing laser scanning of a groove first and performing welding by a TIG weld gun then or performing welding by the TIG weld gun first and performing laser scanning of the groove then are selected; as a result of different materials and welding demands, the track of the laser scanning molten bath has different modes. As the ranges on two sides of the laser scanning groove are same or different or only one side of the groove is scanned by laser, the scanning track can be round, sinusoidal and triangular or special regions are selectively scanned. By means of mutual enhancement and coupling action of laser and arc, the depth of fusion is increased and the efficiency is increased; the molten bath is stirred by scanning the welding molten bath by laser, so that the temperature gradient is reduced, the solidification and crystallization processes are improved, and the welding joint performance is improved.

Description

technical field [0001] The invention relates to the technical field of high-precision laser welding manufacturing, in particular to a laser scanning-TIG composite molten pool oscillation welding method. Background technique [0002] Due to its high energy density, low heat input, small welding deformation, high welding efficiency and good welding quality, laser welding has been widely used and promoted in important fields of the national economy such as automobiles, shipbuilding, aviation and aerospace, and nuclear power. [0003] Laser-TIG hybrid welding can combine the advantages of laser welding and TIG welding to obtain better welding quality, and use the mutual attraction enhancement effect of laser and arc to obtain greater penetration and higher efficiency. However, due to the high energy density of the laser and the fast welding speed, the temperature gradient during the solidification of the weld seam is large, resulting in coarse grains, which affects the mechanica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/348
CPCB23K26/348
Inventor 张轲张裕明
Owner SHANGHAI JIAO TONG UNIV
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