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Hybrid welding continuous welding method and device, welded product, car body

A welding method and hybrid welding technology, applied in welding equipment, laser welding equipment, metal processing equipment, etc., can solve the problem of difficulty in escaping welding pores, and achieve the effects of reducing power density, reducing hydrogen holes, and increasing diameter

Active Publication Date: 2020-09-04
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, welded product, car body
  • Hybrid welding continuous welding method and device, welded product, car body
  • Hybrid welding continuous welding method and device, welded product, car body

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Embodiment

[0042] Such as figure 1 with 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 arc welding, in particular to a hybrid welding continuous welding method and device, a welded product, and a car body. The method of the present invention includes: performing composite welding on the groove of the weldment by coupling laser and polarity-changing arc; wherein, the defocusing amount of the laser is not less than the Rayleigh length of the laser. The method of the present invention effectively reduces the power density of the laser on the surface of the weldment, reduces the depth-to-width ratio of the weld, increases the diameter of the welded hole, effectively reduces the hole caused by the collapse of the welded hole, and further solves the problem of the prior art Welding porosity defects are difficult to escape, reduce the generation of hydrogen pores, effectively improve welding stability and reliability, and improve the mechanical properties of welds.

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 Patents(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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