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

A technology for real-time detection and molten pool surface, applied in measuring devices, arc welding equipment, optical devices, etc., can solve the problems of active gas shielded welding spatter, smoke and dust, and no observation method, etc., to reduce arc instability , optimize welding process parameters, improve the effect of weld forming

Inactive Publication Date: 2016-02-03
XIANGTAN UNIV
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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.

Method used

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

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example 1

[0019] Example 1. The present invention discloses a real-time detection method and device for the surface topography of a swing arc MAG welding pool, mainly including a double-gun swing positioner, a laser projection system, an imaging system, a molten pool detection control system, and an image information processor and molten pool control system. Among them, the double-gun swing positioner is used for the synchronous swing control of MAG welding and TIG welding torches, and for positioning the arc swing position, so as to detect and control the molten pool and identify the welding seam deviation information; the laser projection system is used to project geometric laser stripes, and the imaging system is used for The deformed laser stripe image is collected, and the two are installed at a suitable position before and after the welding torch, and can move with the welding trolley to ensure real-time detection; on the one hand, the molten pool detection control system controls ...

example 2

[0021] Example 2. The present invention is applicable to an automatic welding seam tracking system based on oscillating arc sensing. According to the principle of arc tracking, the surface topography of the molten pool has a significant impact on the length of the arc, which in turn affects the welding current or welding voltage signal collected by Hall. Through the detection of the surface morphology of the swing arc welding molten pool, according to the surface height of the molten pool, its influence on the length change of the scanning arc can be analyzed, and the collected welding current or voltage signal can be corrected to obtain a more accurate weld deviation signal. Improved weld seam tracking accuracy with oscillating arc sensors.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/173G01B11/25
CPCB23K9/173G01B11/254
Inventor 洪波彭瑶姚强唐明雷伟成
Owner XIANGTAN UNIV
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