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A laser welding method with focus rotation and vertical vibration

A vertical vibration and laser welding technology, applied in laser welding equipment, welding equipment, manufacturing tools, etc., can solve the problem of weld penetration reduction and other problems, to improve surface forming, reduce spatter and porosity, and adverse effects of penetration small effect

Active Publication Date: 2017-05-03
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, similar to dual-beam laser welding, the weld penetration obtained by beam rotation or oscillating laser welding methods is also significantly reduced

Method used

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  • A laser welding method with focus rotation and vertical vibration
  • A laser welding method with focus rotation and vertical vibration
  • A laser welding method with focus rotation and vertical vibration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1 welding process parameter is as shown in the table below:

[0019]

[0020] Among them, P is the laser power, v is the welding speed, r xy is the focus horizontal rotation radius, F xy is the focus horizontal rotation frequency, A z is the focus vertical vibration amplitude, F z is the vertical vibration frequency of the focus, d f When the focus has no vertical vibration, it indicates the amount of defocus, and when there is vertical vibration, it is the center position of the focus vibration range.

[0021] The material used in embodiment 1 is 1060 pure aluminum. Before welding, remove the oil stain on the surface of the workpiece to be welded with acetone, remove the surface oxide film with NaOH solution, and use 30% HNO 3 Solution neutralizes residual lye.

[0022] It can be seen from the weld surface and cross-sectional view ( figure 2 ), for example 1, when only rotating and rotating vibration, the surface shape of the weld seam of laser wel...

Embodiment 2

[0024] Embodiment 2 Welding process parameters are as shown in the table below:

[0025]

[0026] Among them, P is the laser power, v is the welding speed, r xy is the focus horizontal rotation radius, F xy is the focus horizontal rotation frequency, A z is the focus vertical vibration amplitude, F z is the vertical vibration frequency of the focus, d f When the focus has no vertical vibration, it indicates the amount of defocus, and when there is vertical vibration, it is the center position of the focus vibration range.

[0027] The materials used in Example 2 and the way of pre-welding treatment are the same as those in Example 1.

[0028] It can be seen from the weld surface and cross-sectional view ( figure 2 ), for Example 2, only under the condition of rotation and rotation vibration, the weld surface shape of laser welding is significantly better than that of non-vibration welding, the welding process is more stable, and the weld porosity and weld penetration ...

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Abstract

The invention discloses a laser welding method with a focus capable of rotating and vertically vibrating. The laser welding method is suitable for laser welding of metal materials. The laser welding method is characterized in that during welding, the laser focus is in uniform circular motion in the direction parallel to a workpiece surface according to a certain radius and frequency and reciprocates in the direction perpendicular to the workpiece surface according to a certain amplitude and frequency. According to horizontal rotation, the radius is 0.1-0.5 mm, and the frequency is 50-400 Hz. The vertical amplitude is 1-3 mm, and the vertical frequency is 50-400 Hz. During vertical vibration, the focus is below the workpiece surface all the time. The laser welding method has the beneficial effects that during welding with optimized technological parameters, through rotation and vertical vibration of the focus, the laser welding process can be effectively stabilized, forming of a weld joint surface is improved, and splashing and air holes during laser welding are reduced. Compared with a laser rotation welding method or a laser swing welding method, the adverse impact of the laser welding method on fusion depth is smaller.

Description

technical field [0001] The invention relates to a laser welding method with focus rotation and vertical vibration, belonging to the technical field of laser welding. Background technique [0002] Laser welding has outstanding advantages such as high energy density, fast welding speed, large weld depth-to-width ratio, good joint performance, and small deformation of the welded structure. With the development of industrial lasers, especially the application of high-power fiber lasers, laser welding technology has also been more and more widely used. [0003] For laser deep penetration welding, especially aluminum alloy materials, there are often problems of poor welding stability and many welding pores. During laser welding, due to the low viscosity and low surface tension of the aluminum alloy, the deep melting holes formed under the action of the laser are unstable, easily shrink and collapse, resulting in unstable welding process, and the liquid metal is also easy to fly u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/24B23K26/046B23K103/10
CPCB23K26/046B23K26/24B23K2103/10
Inventor 肖荣诗官祥威武强邹江林
Owner BEIJING UNIV OF TECH
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