What are the common faults and solutions of Manhart (Guangdong) CNC Machine Tool Co., Ltd.’s laser welding machine?

Common faults and solutions of laser welding machines
1、 Welding cracks
Fault phenomenon: After welding is completed, cracks appear at the weld seam.
Solution:
1. Check if the welding material meets the requirements, ensuring that the material is free of impurities and oil stains.
2. Check if the welding parameters are set appropriately, such as welding speed, laser power, etc.
3. Check if preheating and post weld treatment are carried out properly to improve the quality of the weld.
2、 Insufficient welding penetration
Fault phenomenon: The metal at the weld seam is not fully melted, resulting in unstable welding.
Solution:
1. Increase laser power or decrease welding speed to increase welding energy.
2. Check if the welding joint design is reasonable, such as joint clearance, groove angle, etc.
3、 Flame weakening
Fault phenomenon: During the welding process, the brightness of the laser beam decreases or becomes unstable.
Solution:
1. Check if the laser generator is operating properly, such as xenon lamps, resonant cavities, etc.
2. Check if the laser transmission system, such as optical fibers and reflectors, is clean and undamaged.
4、 Laser output offset
Fault phenomenon: The laser beam deviates from the predetermined track, resulting in inaccurate welding position.
Solution:
1. Check if the positioning device at the laser output end is loose or damaged.
2. Check if the laser transmission system, such as optical fibers and reflectors, is installed correctly.
5、 The resonant cavity diaphragm is damaged
Fault phenomenon: Laser output power decreases or becomes unstable.
Solution:
1. Replace the damaged resonant cavity diaphragm.
2. Check the cleanliness of the resonant cavity to ensure that there are no impurities or oil stains.
6、 The shutter has not been opened
Fault phenomenon: The laser cannot output.
Solution:
1. Check if the shutter system is working properly, such as the shutter motor, sensor, etc.
2. Check if the position of the shutter is correct, and remove any foreign objects that may obstruct it.
7、 Xenon lamp lifespan to
Fault phenomenon: The laser output power has decreased.
Solution:
1. Replace the xenon lamp.
2. When replacing xenon lamps, make sure to follow the operating procedures to avoid damaging other components.
8、 Cooling water pollution
Fault phenomenon: The temperature of the laser generator is too high, resulting in a decrease in output power or equipment failure.
Solution:
1. Check if the cooling water is clean and free of pollution.
2. Regularly replace the cooling water to ensure the cooling effect.
3. Check if the cooling system is functioning properly, such as water pumps, water pipes, etc.
9、 Focusing mirror defocus
Fault phenomenon: Insufficient penetration or excessive fusion width at the weld seam.
Solution:
1. Check if the focusing mirror is installed correctly, and adjust if there is any deviation.
2. Check if the focusing mirror is clean and undamaged. If there is contamination, clean or replace it.
10、 Main optical path offset
Fault phenomenon: The laser beam cannot accurately illuminate the welding area.
Solution:
1. Check if the laser transmission system, such as optical fibers and reflectors, is installed correctly.
2. Check if the connection between the laser generator and the welding head is tight, and adjust if there is any looseness.
Summary: The common faults of laser welding machines mainly include welding cracks, insufficient welding penetration, weakened flame, and laser output deviation. Solving these faults requires comprehensive consideration of multiple aspects such as equipment, process, and operation, and ensuring the normal operation and welding quality of the laser welding machine through reasonable debugging and maintenance.