Infrared lasers have always been difficult to handle the welding of high-reflection materials such as copper, and have disadvantages such as high spatter and pore defects. For high-end manufacturing, Raycus takes the lead and breaks through the difficulty of high-reflection material welding. It launches a blue fiber output semiconductor laser to perform high-quality spatter-free and pore-free welding, achieving a welding effect that cannot be achieved by infrared light or is low-efficiency.
In the absorptivity curve of the material for laser light, the absorptivity of blue light by copper is more than 10 times that of infrared.
There are currently three models of blue lasers launched by Raycus, namely 500W, 1000W and 1500W.
Take 500W blue optical fiber output semiconductor laser as an example. Its characteristic is that the absorptivity of non-ferrous metals is very high, so the 500W blue light can be equivalent to the welding effect of several kilowatts of infrared laser.
The 500W blue laser can be used for welding thin copper plates below 0.3mm, with higher welding efficiency and more precision.
In order to achieve a deeper welding depth, we have done a test of blue and optical fiber composite welding. The blue and infrared light are output at the same time. The advantages of composite welding:
● The molten pool is more stable, and there is no splash during welding
● Small heat affected zone of weld
● The front and back are beautifully formed
The welding effect of 500W blue light and 2000W optical fiber composite welding copper was compared with that of 4800W single optical fiber welding. At the same speed of 80mm/s, the penetration depth of hybrid welding is deeper. When the welding speed drops to 65mm/s, the penetration depth is about 3 times that of a single fiber, and there is no air hole.
Under the high-speed camera, a comparison of the welding process, the left side is hybrid welding, and the right side is single fiber welding. Obviously, the molten pool of composite welding is more stable, and there is almost no spatter.
Based on the growing demand for high-reflection materials such as copper, aluminum and its alloys in the market, the application industries include new energy batteries, consumer electronics, motors, motors, transformers, etc. Facing market demand, blue optical fiber output semiconductor lasers can be widely used for welding metals such as copper to improve welding efficiency and quality, and truly achieve double the efficiency and half the work.