Difficulties in the application of laser welding technology in copper welding.
Release time:
2022-05-30
【Summary Description】 Laser welding machine has the advantages of high energy density, small amount of molten metal, narrow heat-affected zone, high welding quality and high production capacity. The use of purple copper welding can effectively increase production capacity, and is gradually being selected by more and more industries. However, due to the low absorption rate of high reverse data on fiber lasers, processing is also more difficult, which also places more demands on laser sources.
Copper ranks second in industrial manufacturing, second only to aluminum. Copper is widely used in construction, electrical, machinery manufacturing and other industries. Copper has excellent electrical and thermal conductivity, has excellent plasticity, and is easy to hot and cold press processing. With the continuous improvement of production demand, the use of copper is gradually expanding.
laser welding machineIt has the advantages of high energy density, small amount of molten metal, narrow heat affected zone, high welding quality and high production capacity. The use of purple copper welding can effectively increase production capacity, and is gradually being selected by more and more industries. However, due to the low absorption rate of high reverse data on fiber lasers, processing is also more difficult, which also places more demands on laser sources.
prone to copper welding problems:
(1) Difficult to mix and variability: Due to the relatively large thermal conductivity of copper, the heat transfer speed during the welding process is very fast, and the heat affected area of all welded parts is also large, so it is difficult to mix the data together; in addition, due to The linear expansion coefficient of copper is large, and improper clamping force during welding will cause data deformation.
(2) Pores are prone to appear: Another important problem of purple copper welding is pores, especially in deep melt welding. The occurrence of stomata is mainly caused by two situations, one is the hydrogen diffusion hole directly dissolved in the copper, and the other is the reaction hole caused by the redox reaction.
Solution:
The absorption rate of red copper to infrared laser at room temperature is about 5%, and it can reach about 20% after heating to the melting point. In order to realize the laser deep penetration welding of red copper, the laser power density must be increased.
The use of high-power laser with swing welding head, with the beam to stir the molten pool, expand the spoon hole, is conducive to gas overflow, so thatWelding processingThe process is more stable, there is less spatter, and there are fewer micropores after welding.
Related News
Telephone:+86-18594983359
E-mail:Firmkim@cn-huaguang.com
Zip Code: 311112
Address: No. 82, Qihang Road, Renhe Street, Yuhang District, Hangzhou City, Zhejiang Province
Douyin QR code
We chat number
WeChat public account