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Laser welding device with cooling system and welding method thereof

A laser welding and cooling system technology, applied in laser welding equipment, welding equipment, welding/welding/cutting items, etc., can solve the problems of welding residual stress and large deformation, improve welding quality, reduce softening phenomenon, reduce The effect of residual stress

Active Publication Date: 2020-02-25
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

Due to the advantages of concentrated welding heat, small heat-affected area, and high welding efficiency, it has unique advantages in welding new materials such as aluminum alloys and high-strength steels, but there are still problems mentioned above, such as softening of the welding zone or heat-affected zone. , Welding residual stress and deformation are relatively large

Method used

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  • Laser welding device with cooling system and welding method thereof
  • Laser welding device with cooling system and welding method thereof
  • Laser welding device with cooling system and welding method thereof

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Embodiment

[0034] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 Shown is a schematic diagram of this embodiment.

[0035] The workpieces 1 and 2 to be welded are aluminum alloy workpieces that are prone to softening during welding. The welding point 3 is a butt linear weld formed after the workpieces 1 and 2 are welded in the form of butt joints. The welding method used is laser welding, and 5 is liquid spray cooling. System, 6 is the laser head protection nozzle, 7 is the reflective lens inside the laser head, 8 is the focusing lens, 9 is the laser head, 10 is the laser beam, 11 is the water spray, 12 is the spray system located in the laser head protection nozzle Pipeline, 13 is the place where the laser beam exits. The liquid spray cooling system 5 used is distributed inside the protective nozzle 6 of the laser head. The spray is water, the temperature is 20°C, and the flow rate is 20L / min. . Similarly, when ordinary laser welding wel...

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Abstract

The invention relates to a laser welding device with a cooling system and a welding method thereof. The laser welding device with the cooling system comprises a laser welding system, wherein the laserwelding system welds a workpiece so as to form a welding joint or a welding point. The laser welding device with the cooling system further comprises a liquid spray mist cooling system, wherein the liquid spray mist cooling system is provided with one or multiple nozzles, the nozzles are arranged on the periphery of the welding system, the nozzles face the weld joint or the weld point, and the liquid spray mist cooling system generates liquid spray mist through high pressure and sprays the liquid spray mist out through the nozzles so as to cool the weld joint or the weld point before weldingor in the welding process. By adding the liquid spray mist cooling system and using the liquid spray mist to precool or rapidly cool the weld joint, the laser welding device with the cooling system can improve cooling speed of the weld joint, then reduces softening of the weld joint, improves strength of the weld joint, reduces residual stress and residual deformation of the weld joint, and improves weld quality.

Description

technical field [0001] The invention provides a laser welding device and method with a cooling system, and relates to the technical field of welding equipment, in particular to a welding device and a welding method with a cooling system for materials that are prone to softening during welding. Background technique [0002] With the continuous development of science and technology, more and more new materials are designed and applied in welded structures. Materials such as aluminum alloys, magnesium alloys, and high-strength steels are widely designed and used in automobile manufacturing processes. However, when these materials are welded, the common problem is that they will soften in the fusion zone or heat-affected zone, resulting in lower strength and hardness than the base metal itself, which will seriously weaken the load-bearing capacity and service performance of the welded joint. Applications in welded structures. The reason for softening is mainly due to the tempe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/21B23K26/70B23K26/064B23K103/08
CPCB23K26/21B23K26/703B23K26/064
Inventor 杨上陆王艳俊
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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