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Large-thickness titanium alloy narrow-gap laser welding device and method based on automatic powder laying

A laser welding and titanium alloy technology, which is applied in laser welding equipment, welding equipment, welding/welding/cutting items, etc., can solve the problems of metal powder waste and unsatisfactory weld formation, so as to improve utilization rate and save space , the effect of reducing the volume of the box

Pending Publication Date: 2021-03-09
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

On the one hand, due to the small groove of the narrow-gap welding, it is difficult to feed the powder, which easily causes waste of metal powder; on the other hand, the effective protection of the high-temperature weld zone during the welding process has become an urgent problem to be solved. Weld formation after welding is not ideal

Method used

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  • Large-thickness titanium alloy narrow-gap laser welding device and method based on automatic powder laying
  • Large-thickness titanium alloy narrow-gap laser welding device and method based on automatic powder laying
  • Large-thickness titanium alloy narrow-gap laser welding device and method based on automatic powder laying

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Embodiment Construction

[0024] The following is a specific description of a large-thickness titanium alloy narrow-gap laser welding device and method based on automatic powder spreading in the present invention.

[0025] Carry out laser welding experiments based on automatic powder feeding and powder spreading for large-thickness TC4 titanium alloy plates. The size of the titanium alloy plate is 100×50×20mm, and the plate is processed with a U-shaped groove. The groove gap is 5mm and 2mm is reserved. blunt edge. Fix two titanium alloy plates on the lifting and clamping platform without gap. Open the valve of the argon gas cylinder, and increase the gas flow to 25L / min. After the argon gas fills the entire box, reduce the gas flow to 5L / min, and keep the gas flow constant throughout the welding process. The experimental equipment used includes YLS10000 continuous fiber laser and KUKA60 robot, and the maximum average power output by the laser can reach 10000W.

[0026] Import the CAD model of the spl...

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Abstract

The invention relates to a large-thickness TC4 titanium alloy narrow-gap laser welding device and method based on automatic powder laying. The device mainly comprises a guide rail movement system, a powder distribution device, a closed argon box, a control system and laser welding equipment, wherein the guide rail movement system comprises an X-direction guide rail, a Y-direction guide rail, a driving mechanism and a sliding table. The powder distribution device is fixedly connected with the sliding table, movement in the horizontal plane is achieved through the guide rail system, and therefore the purposes of powder feeding and powder laying are achieved. Besides, the top of an argon box body is provided with low-reflection glass, a closed argon environment can be provided for the titanium alloy welding process, and laser welding in the protective gas environment is achieved. According to the device and method, the problem of a large-thickness titanium alloy narrow-gap laser powder filling welding process method is solved, a complete process solution is provided, a defect-free welding joint can be obtained after welding, and the application of a large-thickness titanium alloy narrow-gap laser welding technology to the aviation field is further improved.

Description

technical field [0001] The invention relates to the field of laser welding, in particular to a large-thickness titanium alloy narrow-gap laser welding technology, in particular to a titanium alloy narrow-gap laser welding device and method based on automatic powder feeding and powder spreading. Background technique [0002] With the rapid development of the aviation industry, the application of thick plate titanium alloy is increasing day by day. The narrow gap laser welding process combines the advantages of narrow gap welding and laser welding, and is considered to be the most suitable connection method for large and medium thickness titanium alloy plates. The process has low requirements on production conditions, strong adaptability, high degree of automation, and can obtain well-formed welds. Narrow gap laser welding generally uses powder filling or wire filling to fill the groove. The filling of powder and welding wire can make up for the evaporation and burning loss o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/26B23K26/12B23K26/70B23K103/14
CPCB23K26/26B23K26/123B23K26/702B23K2103/14
Inventor 占小红刘金钊颜廷艳王飞云
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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