What should I do if there are pits on the surface of laser welding

Improper setting of welding parameters
The parameter settings of laser welding have a significant impact on the welding effect. If the parameter settings are not appropriate, it may cause pits on the surface of the weld seam. Therefore, before performing laser welding, it is necessary to set reasonable parameters such as laser power, focal position, and welding speed. Specifically, the following methods can be used to optimize the welding effect and reduce the occurrence of pits:

1. Adjust laser power: If the laser power is too high, it may cause pits on the surface of the weld seam. Therefore, the laser power can be appropriately reduced to adapt to the thickness and gap of the board.
2. Adjust the focus position: The setting of the focus position can also affect the welding effect. If the focal position is too high or too low, it may cause pits on the surface of the weld seam. Therefore, the welding effect can be optimized by adjusting the focus position.
3. Adjust welding speed: Welding speed that is too fast or too slow may cause dents on the surface of the weld seam. Therefore, the welding effect can be optimized by adjusting the welding speed.

The surface of the welded joint is not clean
Dirt or oxides on the surface of welded joints may lead to a decrease in welding quality, resulting in the formation of pits. Therefore, before laser welding, it is necessary to thoroughly clean the welding joint to ensure its surface is clean. Specifically, solvents or acid-base cleaning agents can be used for cleaning, and then wiped dry with a clean cloth.

Welding material issues
If the welding material used is prone to producing pores or pits, then it is easy to have pits. Therefore, it is possible to try using other welding materials or adding some suitable welding aids to improve the welding quality.

Welding equipment malfunction
Malfunctions of welding equipment may also cause dents on the surface of the weld seam. Therefore, before performing laser welding, it is necessary to check the optical path, cooling system, gas supply, and other parts of the laser welding machine to ensure their normal operation. If a malfunction is found, the equipment should be repaired or replaced in a timely manner.

Optimize welding process
In addition to the above solutions, the occurrence of dents can also be reduced by optimizing the welding process. For example, adjusting the position and size of the welding spot to match the thickness and gap of the plate; Select appropriate welding parameters, such as laser power, focusing position, shielding gas, etc., and optimize them based on the material and characteristics of the sheet metal.

In summary, to solve the problem of surface pits in laser welding, it is necessary to comprehensively consider factors such as welding parameters, welding materials, welding equipment, and welding processes, and take corresponding measures for optimization and improvement. By setting welding parameters reasonably, thoroughly cleaning welding joints, selecting suitable welding materials, checking welding equipment faults, and optimizing welding processes, the occurrence of surface pits in laser welding can be effectively reduced.