Advantages of Laser Welding of Aluminium Alloy

Laser welding is a new type of welding. It is mainly used for welding thin-walled materials and precision parts. It can realize spot welding, butt welding, welding, sealing welding, high aspect ratio, small weld width, small heat-affected zone, small deformation, fast welding speed, smooth weld, simple processing after welding, high welding quality, no pore, precise control, small focus and positioning. High precision, easy to automate. High power laser welders have been introduced and various types of laser welders can be repaired for thicker materials.

Nowadays, aluminium alloy products often appear in aluminium alloy doors and windows. Pots and pans are made of aluminium. The common use of aluminium alloy also promotes the development of continuous welding technology of aluminium alloy, which is equivalent to continuous laser welding technology and has entered the aluminium application market. There are many difficulties in the welding process of traditional aluminium alloys. For example, the thermal conductivity of aluminium alloys is very high, about 2-4 times that of steel, and their heat resistance is very poor. Usually, aluminium alloys are not resistant to high temperature and have large expansion coefficient, so they are easy to produce. The tendency of welding deformation and cracking is also obvious. Because of these welding difficulties, it is difficult for processing manufacturers to find better welding methods day and night.

These seemingly insignificant leaks often cause unexpected trouble. Laser welding technology to produce continuous laser welding machine can easily solve these small leaks, thus effectively guaranteeing the integrity of the workpiece and not being damaged. So how can CW surpass traditional welding? Does it have a better advantage? Laser welding of aluminium alloy has three unique advantages: high energy density, high welding speed, no influence or slight influence on non-welded parts, no thermal deformation of fonts; high efficiency, tool wear, saving materials, speed is 8-10 times of traditional welding words, can work for a long time, low heat; small size, easy operation, high efficiency, solder joint is firm and beautiful, is a kind of. Very flexible welding method;

With the explosion of new energy vehicles, as the power source of new energy vehicles, the battery industry has huge market potential and is also an important part of the national strategic development. As the core component of new energy vehicle, the quality of power battery directly determines the performance of the vehicle, so its production process has attracted much attention. Laser processing technology as an alternative to traditional welding technology has been widely used in battery manufacturing.

With the popularity of new energy vehicles, as a battery industry that provides power sources for new energy vehicles, the market potential is huge and an important part of the country's strategic development. As the core component of new energy vehicles, the power battery directly determines the performance of the whole vehicle, so its production process has received much attention. Laser processing technology has been widely used in battery manufacturing as an alternative to traditional soldering technology.

What are the advantages of laser welding compared to traditional welding methods? Large laser spot can be produced by defocusing method for welding; pulse or continuous mode has high welding quality; good power stability during welding; high reflectivity material can be welded; heat generated in pulse mode is extremely low; Defective material; welding speed is extremely fast in continuous mode; automatic control of abnormal conditions; pulse shaping capability.

Laser welding offers an efficient and stable process due to its high precision and rapid productivity, and it has many applications in the electronics and automotive industries.

Traditionally, laser welding has been accomplished by a fixed horn that has a higher power laser with a lower beam quality to provide an acceptable weld width because the single mode beam is too sharp, resulting in a very narrow weld profile. In contrast, wobble welding (or oscillating welding) is where high beam quality lasers and galvanometer scan heads are used to quickly oscillate the focus. This welding method makes it easier to control welding parameters such as weld width and penetration depth, which can lead to a more efficient welding process.

Generally, soldering copper is considered to be challenging due to high optical reflectivity and thermal conductivity. This can result in unstable weld seams and easy formation of splashes. High reflectivity means that the material does not absorb a high proportion of the laser beam, which can result in high levels of back reflection, which can result in damage to the beam delivery system and laser instability. These problems can be reduced by using a wobble welding technique.