Common faults and maintenance methods of aluminum laser welding machines

High reflectivity and thermal conductivity pose certain challenges to laser welding, including issues such as weld oxidation, thermal cracking, and insufficient penetration depth. Therefore, understanding and timely troubleshooting common faults in aluminum laser welding machines is crucial for ensuring welding quality and production efficiency.

1、 Common faults and maintenance methods
Fault 1: Surface oxidation of the weld seam
Cause analysis: Aluminum materials are prone to react with oxygen in the air during welding, forming an oxide film that affects welding quality.
Solution: Use protective gas (such as argon) to cover the welding area and reduce oxidation; Adjust welding parameters, such as increasing power density and reducing welding time.

Fault 2: Weld crack
Cause analysis: Stress concentration caused by welding thermal cycle, or brittleness of the workpiece material itself.
Solution: Optimize the welding sequence and use preheating or post heat treatment; Adjust welding speed and power to reduce heat input; Ensure that the workpiece is clean and free of grease or impurities.

Fault 3: Insufficient melting depth
Cause analysis: Insufficient laser energy density or improper focusing position.
Solution: Increase laser power, adjust pulse width and frequency; Accurately adjust the focus position to ensure optimal energy absorption.

Fault 4: Equipment startup failure
Manifestation: The device cannot start properly.
Solution: Check the status of the power cord, fuse, and switch; Confirm that the control system software is correct.

Fault 5: Laser output unstable
Cause analysis: contamination or aging of optical components, cooling system failure.
Solution: Regularly clean the laser head and optical lenses; Check if the cooling system circulation is smooth and ensure that the water temperature is appropriate.

2、 Preventive maintenance and daily inspections

Regularly replace protective gas to ensure gas purity.
Check and clean the laser and optical components to avoid the accumulation of dust and stains.
Monitor the cooling system, maintain appropriate operating temperature, and prevent overheating.
Regularly calibrate the equipment to ensure the accuracy of various parameters.
Record welding process data, analyze trends, and prevent potential problems.

Source: Haiwei Laser