Real-time detecting method and device for surface topography of swing arc MAG welding molten pool

Abstract

The invention discloses a real-time detecting method and a device for a surface topography of a swing arc MAG welding molten pool. The device mainly comprises a double-gun swing positioner, a laser projecting system, an imaging system, a molten pool detecting control system, an image information processor and a molten pool control system. The double-gun swing positioner is used for controlling synchronous swing of a MAG welding gun and a TIG welding gun and positioning an arc position. The method is characterized in that the TIG welding gun is placed beside the MAG welding gun, and a stable coupling arc is formed by the TIG welding gun and the MAG welding gun to provide excellent arc light environment for the detection of the molten pool. In the welding process, when the TIG welding gun and the MAG welding gun swing to the most left side or the most right side of a welding lane (the interference of the arc on the molten pool is the lowest), an arc positioning device in the double-gun swing positioner emits the pulse to the molten pool detecting control system to control the imaging system to acquire images so as to obtain the topography of the swing molten pool. On the aspect of signal source, the device and the method effectively reduce such interference factors as splashing and smoke in the MAG welding, optimize the molten pool detecting method, and promote the molten pool control technology.

Description

technical field [0001] The invention belongs to the technical field of welding automatic detection, and in particular relates to a real-time detection method and device for the surface topography of a swing arc MAG welding molten pool. Background technique [0002] Welding sensing technology is an important part and key link of welding process control, and molten pool information is an important part of welding sensing process. The observation of the welding pool is of great significance to the grasp of the information of the welding process. At present, the research on the morphology of welding pool at home and abroad is mostly focused on TIG welding with relatively stable arc, while the research progress of active gas shielded welding (MAG welding) is slow due to more spatter and smoke. As for the observation method of the swing MAG welding pool, there is almost no ideal observation method due to the interference of many factors such as arc swing. But the swing arc MAG w...

AI Technical Summary

Problems solved by technology

At present, the research on the morphology of welding pool at home and abroad is mostly focused on TIG welding with relatively stable arc, while the research progress of active gas shielded welding (MAG welding) is slow due to more spatter and smoke.

However, for the observation method of swing MAG welding pool, there is almost no ideal observation method due to the interference of many factors such as arc swing.

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