Airflow-assisted laser filler wire narrow-gap welding device and application method
A technology of laser wire filling and welding method, which is applied in the direction of laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of poor wettability and spreadability, and achieve improved welding stability, improved welding quality, and good side wall wetting performance effect
Inactive Publication Date: 2020-03-31
李军兆
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Problems solved by technology
However, compared with arc welding, laser welding has no additional arc force to act on the molten pool, so its wettability to the side wall is poor, especially the difficulty of molten pool dripping in non-flat welding positions
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[0016] The present invention is described below based on examples, but the present invention is not limited to these examples. In the following detailed description of the present invention, some specific details are described in detail, and in order to avoid obscuring the essence of the present invention, known methods, procedures, procedures, and components are not described in detail. Furthermore, those of ordinary skill in the art will appreciate that the drawings provided herein are for illustrative purposes and are not necessarily drawn to scale.
[0017] The high-speed airflow assisting device provided by the present invention is mainly used to provide additional auxiliary force for the narrow-gap laser wire-filling welding pool, promote the welding pool to wet and spread to the side wall of the groove, and improve the welding shape, especially in non-flat The welding position is used to counteract the sinking phenomenon of the molten pool caused by gravity and improve ...
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The invention relates to the technical field of laser welding and machining, and particularly relates to an airflow-assisted laser filler wire narrow-gap welding device and an application method. Thedevice comprises a laser head, a wire feeding device, a coaxial or bypass shielding gas device, an airflow assistant device and the like. In the laser filler wire welding process, the coaxial or bypass shielding gas device is adopted for protecting a welding molten pool area, and oxidation of the molten pool area is avoided. Meanwhile, a high-speed airflow is adopted for impacting the welding molten pool are, and the protective airflow can be in a continuous or pulse mode and assists the high-speed airflow in generating certain pressure on the molten pool area, so that the molten pool is enabled to spread and wet towards the narrow-gap side wall or avoid a phenomenon that the molten pool collapses at a non-flat welding position, and airflow-assisted laser filler wire narrow-gap welding isrealized. The device is low in cost, can remarkably improve the laser filler wire narrow-gap welding forming and joint structure performance, is suitable for process regulation and control at the non-flat welding position, widens the process window, and improves the welding adaptability.
Description
technical field [0001] The invention relates to the technical field of laser welding processing, in particular to an airflow-assisted laser wire filling narrow gap welding device and a using method. Background technique [0002] In the field of metal material processing, especially in shipbuilding, nuclear power equipment, pressure vessels and other equipment manufacturing industries, the connection production of thick plate materials is inevitable. For the connection of medium and thick plates, the arc welding method is routinely used at present, but due to its defects such as large welding heat input, welding deformation, coarse structure, and weak performance, the performance of the joint is greatly reduced. As a new type of welding heat source, high energy beam laser has been widely researched and applied. However, compared with arc welding, laser welding has no additional arc force to act on the molten pool, so its wettability to the side wall is poor, especially the d...
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IPC IPC(8): B23K26/211B23K26/70
CPCB23K26/211B23K26/702
Inventor 高成玉魏雷
Owner 李军兆