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Hybrid welding continuous welding method and device, welding finished product and vehicle body

A welding method and hybrid welding technology, applied in the field of welded products, composite welding continuous welding method and device, and car body, can solve the problems such as welding pores are difficult to escape, reduce power density, reduce hydrogen pores, and improve welding stability and reliability effects

Active Publication Date: 2019-07-12
CRRC QINGDAO SIFANG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The embodiment of the present invention provides a hybrid welding continuous welding method and device, a welded product, and a car body, which are used to solve the problem that welding pores are difficult to escape in the prior art, and effectively improve welding stability and reliability

Method used

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  • Hybrid welding continuous welding method and device, welding finished product and vehicle body
  • Hybrid welding continuous welding method and device, welding finished product and vehicle body
  • Hybrid welding continuous welding method and device, welding finished product and vehicle body

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Embodiment

[0042] Such as figure 1 and figure 2 As shown, the hybrid welding continuous welding method provided in this embodiment includes: performing hybrid welding on the groove of the weldment by coupling laser and polarity-changing arc. Among them, the defocus amount H of the laser is not less than the Rayleigh length Z of the laser R. This method can use laser-polarity variable hybrid welding to realize continuous welding of the weldment to be welded, and use the energy coupling effect of hybrid welding to ensure welding stability, and at the same time expand the defocus of the laser beyond the range of the Rayleigh length of the laser, thereby It solves the problem that the welding pores are difficult to escape in the prior art, and effectively improves the welding stability and reliability.

[0043] In the traditional laser arc hybrid welding, the laser generated by it has no defocus or the defocus amount H is very small, so the laser spot 9 falling on the workpiece surface ...

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Abstract

The invention relates to the technical field of laser electrical arc welding, in particular to a hybrid welding continuous welding method and device, a welding finished product and a vehicle body. Thehybrid welding continuous welding method comprises carrying out hybrid welding on the groove of a weldment through laser and polarity-changing electric arc coupling, wherein the defocusing amount oflaser is less than the rayleigh range of laser. With adoption of the hybrid welding continuous welding method, the laser power density on the surface of the weldment is effectively reduced, the depth-to-width ratio of a welding seam is reduced, the diameter of a welding molten hole is increased, the hole of the welding molten hole caused by the small hole collapse phenomenon is effectively reducedto solve the problem in the prior art that the welding bubble is difficult to escape, generation of a hydrogen hole is reduced, the welding stability and reliability are effectively reduced, and themechanical property of the welding seam is improved.

Description

technical field [0001] The invention relates to the technical field of laser arc welding, in particular to a hybrid welding continuous welding method and device, a welded product, and a vehicle body. Background technique [0002] Aluminum alloy has the advantages of high specific strength, good corrosion resistance, good plasticity, and easy processing and forming. It is widely used in the manufacture of car bodies in the lightweight structure design of high-speed trains. Based on the needs of the overall load-bearing car body structure of high-speed trains, a large number of hollow aluminum alloy profiles are used in the car body manufacturing and formed into one body through tailor welding. Compared with the traditional arc welding method for welding aluminum alloys, the welding of aluminum alloys by laser-arc hybrid welding has strong focusing characteristics, high energy density, fast welding speed, small welding deformation, good joint performance, and increasingly wide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/348B23K26/70
CPCB23K26/348B23K26/702B23K26/048
Inventor 韩晓辉毛镇东高月欣郑凯李刚卿
Owner CRRC QINGDAO SIFANG CO LTD
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