Dual laser beam dual side simultaneous welding wire filling droplet transfer monitoring system and method based on high-speed photography

A high-speed camera and droplet transfer technology, applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve problems such as periodic instability, unfavorable laser energy transition, etc., to improve memory usage efficiency and speed up processing speed , Reduce the effect of welding porosity

Active Publication Date: 2020-05-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

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

Method used

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  • Dual laser beam dual side simultaneous welding wire filling droplet transfer monitoring system and method based on high-speed photography
  • Dual laser beam dual side simultaneous welding wire filling droplet transfer monitoring system and method based on high-speed photography
  • Dual laser beam dual side simultaneous welding wire filling droplet transfer monitoring system and method based on high-speed photography

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Embodiment Construction

[0035] In order to further illustrate the monitoring of droplet transition of 2060 / 2099 aluminum alloy droplet transition based on high-speed imaging based on high-speed camera bilateral synchronous wire filling welding 2060 / 2099 aluminum alloy in the following with reference to the accompanying drawings and examples.

[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 stringers is 2mm, the joint type is T-joint, and the relevant parameters of the laser beam are: laser power 2-10kW, welding speed 4-7m / min, wire feeding angle 20 °~55°. The droplet transfer forms of laser wire filling welding mainly include liquid bridge transition and large droplet transition. Among them, the liquid bridge transition droplet transfer is stable, and the welding speed and wire filling speed have good adaptability...

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Abstract

The invention discloses a dual laser beam dual side simultaneous welding wire filling droplet transfer monitoring system and method based on high-speed photography. In the process of dual laser beam dual side simultaneous welding wire filling, a droplet transfer mode and frequency are monitored in real-time by a high-speed camera system, so that the purpose of monitoring dual laser beam dual sidesynchronous welding wire filling droplet transfer at different wire feeding speeds in the whole process is achieved. The dual laser beam dual side simultaneous welding wire filling droplet transfer monitoring system mainly includes four parts of a duel laser beam duel side simultaneous welding wire filling system, a high-speed video acquisition and processing system, a full digital wire feeding control system and an image processing system, and is characterized in that the droplet transfer on both sides of a stringer is monitored simultaneously by two high-speed cameras, and the acquired images are processed quickly by the digital image processing software, so that the droplet transfer frequency is calculated quantitatively. According to the dual laser beam dual side simultaneous welding wire filling droplet transfer monitoring system and method, the droplet transfer mode and frequency can be monitored in real time, and thus the weld quality of laser welding is improved.

Description

technical field [0001] The invention relates to a monitoring system and method for monitoring the droplet transition of filler wire in dual-laser beam bilateral synchronous welding based on high-speed camera, and belongs to the technical field of laser welding quality monitoring. Background technique [0002] In the fields of aerospace and machinery manufacturing, laser welding of aluminum alloys has been more and more widely used due to its advantages of high energy density, small welding deformation, and small processing flexibility. Especially in the field of aerospace, for the most common skin-stringer structure in the aircraft fuselage section, the double-laser beam bilateral simultaneous welding technology can not only realize the efficient connection of T-shaped structural welded joints, but also greatly improve the welding performance compared with riveting. The weight of the fuselage is reduced. At present, a variety of aircraft such as A318 and A380 have successfu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/26B23K26/03
CPCB23K26/26B23K26/032
Inventor 占小红陈丹王磊磊
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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