Composite laser welding method

A laser welding and laser technology, applied in the direction of laser welding equipment, welding equipment, metal processing equipment, etc., to achieve high absorption rate, improve weld strength, and improve the effect of laser process defects

Pending Publication Date: 2022-07-22
湖南中南智能激光科技有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

However, these technologies only improved the influence of welding defects in one or two aspects, and failed to solve many welding technical problems as a whole.

Method used

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  • Composite laser welding method

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Embodiment Construction

[0025] The present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not have any limiting effect on the protection scope of the present invention. In addition, according to the description in this document, those skilled in the art can make corresponding combinations of features in the embodiments in this document and in different embodiments.

[0026] Examples of the present invention are as follows, refer to figure 1 , a composite laser welding method, comprising the following steps:

[0027] (1) Place the workpiece 1 to be welded on the welding table;

[0028] (2) Laser preheating: The preheating laser beam 3 (flat-top laser beam) runs to the position of the welding seam 2, and the laser is turned on to start emitting light; the preheating laser beam 3 moves along the welding seam 2 at the welding seam 2 position to preheat workpiece to be welded;

[0029] (...

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Abstract

The invention relates to a composite laser welding method. The composite laser welding method comprises the following steps that (1) a workpiece to be welded is placed on a welding workbench; (2) laser preheating: a laser beam moves along a welding seam at the position of the welding seam to preheat a to-be-welded workpiece; (3) laser cleaning is conducted, specifically, a laser beam moves along a weld joint at the position of the weld joint to conduct laser cleaning, carbon generated in the preheating process is separated out, and an oxide layer and other impurities are cleaned up; and (4) laser welding is conducted, specifically, a laser beam moves in the weld joint and conducts welding along the weld joint. According to the laser preheating method, the local preheating mode of the welding seam position is achieved, the laser preheating is conducted on the welding seam position of the to-be-welded workpiece before welding, so that the laser absorption rate of the to-be-welded material is higher, thicker materials can be welded through lower laser power, the welding penetration depth is increased, and after laser cleaning, air holes are not prone to being generated in the product. By the adoption of the welding process, the welding seam strength can be greatly improved, and all laser process defects are effectively improved.

Description

technical field [0001] The invention belongs to the technical field of laser welding, in particular to a composite laser welding method. Background technique [0002] At present, there are many composite welding technologies in the field of laser welding, such as IPG's AMB technology, which can realize low-spatter welding by adding a ring-shaped spot technology to the main spot; Gaussian beam welding technology with different wavelengths can also realize low-spatter welding, green light , blue laser technology, also improve spatter. In order to reduce the porosity, the pre-welding laser cleaning technology was developed; in order to improve the welding depth, the laser power of the laser was also continuously increased. In order to improve the surface forming of the weld, the laser swing welding technology was used. However, these technologies only improve the influence of welding defects in one or two aspects, and fail to solve many welding technical problems as a whole. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/24B23K26/36B23K26/60B23K26/14
CPCB23K26/24B23K26/60B23K26/36B23K26/14
Inventor 刘雁清凌润峰蒋京刚何培张继伟
Owner 湖南中南智能激光科技有限公司
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