Manhart How to avoid material overheating during handheld laser welding process?

To avoid material overheating during handheld laser welding, the following measures can be taken:
1、 Adjusting laser power
*Reasonable matching of laser power: The magnitude of laser power directly affects the temperature of the welding area. Excessive laser power can cause local overheating of the material, thereby affecting welding quality. Therefore, in the process of laser welding, it is necessary to adjust the laser power reasonably based on the thickness, type, and welding requirements of the material.
** * Reduce laser energy density * *: Excessive laser energy density is one of the main reasons for material overheating. By reducing laser power, increasing spot diameter, or increasing welding distance, the laser energy density can be effectively reduced, thereby avoiding material overheating.
2、 Adjusting welding speed
** * Increase welding speed appropriately * *: During laser welding, a slow welding speed can cause the laser beam to stay on the material for too long, resulting in excess heat generation. Therefore, increasing the welding speed appropriately can shorten the residence time of the laser beam on the material and avoid material overheating.
*Maintaining a stable welding speed is crucial for avoiding material overheating. Too fast welding speed may lead to insufficient welding, while too slow speed may cause overheating. Therefore, it is necessary to ensure the stability and consistency of welding speed.
3、 Optimize heat dissipation conditions
** * Increase the heat dissipation of materials * *: When welding materials, materials with good heat dissipation can be added or heat dissipation protrusions can be made on their surfaces to increase the heat dissipation area and effectively reduce temperature.
** * Keep the device’s heat sink unobstructed * *: Regularly clean the dust on the cooling fan and fins to ensure that the device’s heat sink is unobstructed and improve heat dissipation efficiency.
4、 Reasonably arrange work hours
** * Avoid prolonged continuous work * *: Prolonged continuous work can cause equipment overheating, which in turn affects welding quality and equipment lifespan. Therefore, it is necessary to arrange work and rest time reasonably to avoid equipment working continuously for a long time.
5、 Use appropriate protective gas
** * Choose high-purity shielding gas * *: High purity shielding gas can effectively prevent contamination of the welding area by impurities such as oxygen and water vapor in the air, reduce heat loss, and improve welding quality.
6、 Timely replace aging laser heads or instruments
*Regular inspection and replacement: For frequently used laser heads or instruments, their performance and condition should be checked regularly, and aging components should be replaced in a timely manner to ensure stable output quality and power of the laser, and to avoid welding defects and heating problems caused by aging.
By implementing the above measures, the problem of material overheating during handheld laser welding can be effectively avoided, and the welding quality and efficiency can be improved.