If the welding surface of the laser welding machine is not properly treated, the welding quality will be affected, resulting in uneven welds, insufficient strength, and even cracks. The following are some common reasons and their corresponding solutions:
1. There are impurities such as oil, oxide layer, rust, etc. on the welding surface.
Cause: There are oil, oxide layer, stains or rust on the surface of the metal material, which will interfere with the effective conduction of laser energy. The laser cannot act stably on the metal surface, resulting in poor welding quality and weak welding.
Solution: Clean the welding surface before welding. Special cleaning agents, abrasive sandpaper or laser cleaning can be used to remove impurities and ensure that the solder surface is clean and oil-free.
2. The surface is uneven or bumpy.
Cause: The uneven surface will cause the laser beam to scatter, making it difficult to evenly irradiate the entire welding surface, thus affecting the welding quality.
Solution: Check and repair the uneven surface before welding. They can be made as flat as possible by machining or grinding to ensure that the laser can work evenly.
3. The distance between the welds is too large.
Cause: The gap between the welding materials is too large, and it is difficult for the laser beam to produce a good fusion between the two, resulting in unstable welding.
Solution: Control the processing accuracy of the material, try to keep the distance between the welded parts within a reasonable range, and ensure that the laser can be effectively integrated into the material during welding.
4. Uneven surface material or poor coating treatment
Cause: Uneven materials or poor surface coating treatment will cause different materials or coatings to reflect and absorb the laser differently, resulting in inconsistent welding results.
Solution: Try to use homogeneous materials or remove the coating in the welding area to ensure uniform laser action. The sample material can be tested before full welding.
5. Insufficient cleaning or residual cleaning agent.
Cause: The cleaning agent used is not completely removed, which will cause decomposition at high temperatures during welding, produce pollutants and gases, and affect the welding quality.
Solution: Use an appropriate amount of cleaning agent and clean thoroughly or use a dust-free cloth after cleaning to ensure that there is no residue on the welding surface.
6. Surface treatment is not performed according to the procedure.
Cause: If the standard process is not followed during surface preparation, such as the lack of cleaning, flattening and other steps, it may result in unsatisfactory welding results.
Solution: Develop a standard surface treatment process and strictly implement it, including cleaning, grinding, leveling and other steps. Regularly train operators to ensure that the surface treatment meets welding requirements.
Through these measures, the welding quality of the laser welding machine can be effectively improved, and the negative impact of poor surface treatment on the welding effect can be avoided.
Post time: Nov-09-2024
