How to solve the problem of black smoke during laser welding with a laser welding machine

Analysis of black smoke

1. Laser welding produces absolutely no black smoke, which is currently unachievable in the entire industry. Both laser welding and laser cutting are the same in that they generate black smoke, which is why laser cutting machines are equipped with smoke extraction devices.

2. Compared to traditional shielded metal arc welding and argon arc welding, laser welding has its unique advantages. From the perspective of black smoke, shielded metal arc welding produces significantly more black smoke than laser welding. This is because argon arc welding is slower and produces black smoke, but it is not very noticeable visually. Moreover, because laser welding produces less arc light, the black smoke is more visible to everyone. Since laser welding machines are new technological products that have only emerged in the past two years, it is normal for people to have higher expectations for lasers.

3.Currently, there are two types of black smoke from laser welding. One type forms black deposits on the workpiece, while the other type exists in the air. We can currently prevent the accumulation of more obvious black smoke deposits, but it still exists in the air.

4. How to reduce black smoke in the air? We have conducted several tests, and based on our test results, we have also communicated with some peers

The factor of black smoke

a.The amount of black smoke during welding is closely related to the welding material. Different welding materials produce varying amounts of black smoke. We have previously conducted welding on aluminum alloys, and the amount of black smoke differs significantly depending on the type of aluminum alloy used,

b. If there is an oil film protective layer/oxidation layer on the surface of the workpiece, the welding fume will be heavier,

c. Black smoke is related to welding wire, as the current welding wire is all for traditional welding and there is no welding wire specifically for the laser industry. Therefore, it is difficult to control in the laser industry. It is recommended to use the existing smoke-free welding wire.

d.The amount of welding fume is related to the welding process, such as welding speed and technique. For example, welding aluminum at low power may produce less fume compared to welding at high power

e: The damage of the lens is generally due to poor welding effect