A system and method for monitoring the droplet transition of filler wire in double-laser beam simultaneous welding on both sides under high-speed camera
A high-speed camera and droplet transfer technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve the problems of periodic instability, unfavorable laser energy transition, etc., to speed up image data processing speed, improve memory Use efficiency, reduce the effect of welding porosity
Active Publication Date: 2022-06-21
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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However, the transition behavior of the droplet in the laser welding process is periodic and unstable, which is not conducive to the transition of laser energy into the weld pool
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[0035] In order to further describe the droplet transfer monitoring of 2060 / 2099 aluminum alloys based on high-speed camera based on high-speed camera and double-side synchronous wire-filling welding of 2060 / 2099 aluminum alloys.
[0036] The filler material used in welding is 4047 aluminum alloy welding wire with a diameter of 1.2mm, the stringer is 2099 aluminum alloy, and the skin is 2060 aluminum alloy. During the welding process, the thickness of the skin and the stringer is 2mm, the joint type is T-joint, and the relevant parameters of the laser beam are: the laser power is 2~10kW, the welding speed is 4~7m / min, and the wire feeding angle is 20 °~55°. The droplet transfer forms of laser wire-filling welding mainly include liquid bridge transfer and large droplet transfer. Among them, the liquid bridge transfer has stable droplet transfer and good adaptability to welding speed and wire filling speed, while the large droplet transfer form of droplet transfer shows Periodi...
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Abstract
A high-speed camera-based monitoring system and method for droplet transition monitoring of double-sided simultaneous welding of double-laser beams for wire filling, through which the high-speed camera system monitors the transition mode and frequency of droplet in the process of double-sided simultaneous welding of double-laser beams and wire-filling in real time , in order to achieve the purpose of monitoring the droplet transition of the double laser beam bilateral synchronous welding filler wire under different wire feeding speeds. The present invention mainly includes four parts: dual laser beam bilateral synchronous welding wire filling system, high-speed camera collection and processing system, fully digital wire feeding control system and image processing system. The droplet transfer is monitored at the same time, and the digital image processing software is used to quickly process the collected images to achieve quantitative calculation of the droplet transfer frequency. The invention can realize the real-time monitoring of the droplet transfer mode and transfer frequency, thereby improving the weld seam quality of laser welding.
Description
technical field [0001] The invention relates to a system and method for monitoring the transition of double-laser beam double-side synchronous welding wire-filling droplet transition based on high-speed camera, and belongs to the technical field of laser welding quality monitoring. Background technique [0002] In aerospace, machinery manufacturing and other fields, laser welding of aluminum alloys has been more and more widely used due to its high energy density, small welding deformation, and small processing flexibility. Especially in the aerospace field, for the most common skin-stringer structure in the barrel section of the aircraft fuselage, the use of dual laser beam bilateral synchronous welding technology can not only realize the efficient connection of T-shaped structural welded joints, but also greatly compared with riveting. Reduced the weight of the fuselage. At present, a variety of aircraft models such as A318 and A380 have successfully applied aluminum allo...
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IPC IPC(8): B23K26/26B23K26/03
CPCB23K26/26B23K26/032
Inventor 占小红陈丹王磊磊
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS