An integrated laser cleaning and laser welding equipment and method for curved thin-walled structures

Abstract

The invention discloses a laser cleaning and laser welding integrated equipment and method for curved thin-walled structures. The welding system includes a first laser generator, a second laser generator, a distance measuring system, a time delay system, and an automatic focusing system And the slag cleaning device, wherein the ranging system includes a spectroscopic system and an optical signal sensor. The second laser generator produces a cleaning laser beam, and generates a distance-measuring beam parallel to the cleaning beam through a spectroscopic system. The first laser generator produces a welding laser beam. The delay system adjusts the real-time distance signal according to the actual welding speed. The automatic focusing system performs automatic focusing processing on the transmitted laser beam, so that the laser can focus and work on the surface of the sample to be welded as required. A slag removal nozzle is installed on the rear side of the second laser generator to remove the residue generated by laser cleaning by jetting high-speed and high-pressure airflow. The invention avoids the disadvantage of poor welding effect caused by difficulty in controlling the focus position of the laser beam due to uneven surface, and effectively ensures the uniformity and good quality of the weld seam on the curved surface.

Description

technical field [0001] The invention relates to a laser welding system, in particular to a laser cleaning and laser welding integrated welding system for curved surface connection, which belongs to the technical field of laser welding. Background technique [0002] Laser cleaning is a new type of surface pretreatment method, which has a series of advantages such as high cleaning efficiency, good cleaning quality, wide application range, small substrate damage, low labor intensity, no pollution to the environment, and easy automation. Laser cleaning before welding can effectively remove the original oxide film on the surface of the sample, which can greatly reduce the tendency of process pores and hydrogen pores in the weld after welding, increase the absorption rate of the surface to the laser, and improve the droplet on the surface. Spread wettability, thereby improving the form quality of the weld. Laser welding is an efficient and precise welding method that uses a high-...

AI Technical Summary

Problems solved by technology

At present, different lasers are used for laser cleaning and laser welding. The cost is high, the equipment is complex and bulky, and most of them can only be used for plane connection. Therefore, there is an urgent need for a set of integrated laser cleaning and laser welding equipment for curved surface connection.

Images