A laser welding device and its working method

Abstract

The invention relates to a laser welding device and its working method, which belong to the field of laser welding. The laser welding device can convert the laser beam emitted by the laser into a double-striped spot, project it onto the surface of the workpiece, and combine the welding wire swing mechanism to weld together. artifact. The welding device is mainly used to solve laser in tailor welding and fillet welding. Because of the workpiece production error, the laser spot is small and easy to produce welding defects. It is also used in laser wire feeding welding. The welding wire is easy to deviate from the original molten pool and cause Welding defects and other issues. The laser welding device is composed of two parts, the optical path part and the welding wire swing mechanism part. In the optical path, the laser passes through the collimating mirror, projects to the house-shaped mirror, and then is focused by the parabolic focusing mirror to form a double-striped laser spot. In the optical path, the lens is fully water-cooled, which is very suitable for high-power laser output. The welding wire swing mechanism mainly includes a drive motor, an upper swing arm, a lower swing arm and a wire feeding fixed block.

Description

technical field [0001] The invention relates to the field of laser welding, specifically laser tailor welding, fillet welding and laser wire feeding welding. Background technique [0002] With the development of laser, high-power laser welding is widely used in industry, especially laser tailor welding, fillet welding and laser wire feeding welding have been widely used in automobile, shipbuilding, aerospace, mining and other fields. Such as welding of unequal thick plates in automobiles, welding of thick plates in shipbuilding, tailor welding of titanium plates in aerospace, etc. [0003] At present, the welding optical path of the laser is relatively small compared to the splicing seam system. Even if a thicker core diameter optical fiber is used for transmission, it is very easy to produce welding defects in laser tailor welding, fillet welding, and wire-feed welding applications. In laser tailor welding, due to the manufacturing error of the workpiece, gaps are likely t...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a simple, convenient and stable laser welding device, aiming to solve the problem of laser tailor welding, fillet welding and laser wire feeding welding which are easy to be limited or caused by the workpiece workmanship or the relatively small spot in the prior art. Defects and other technical issues

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