Inspection and Commissioning of Fiber Laser Welding Machines

To ensure the fiber laser welder maintains normal operating conditions, after continuous operation for two weeks or following extended periods of inactivity, inspect optical path components such as the YAG rod, dielectric film, and lens protective glass before startup. Verify that all optical components show no signs of dust contamination, mold growth, or other abnormalities. Address any such issues promptly to prevent damage to optical components under intense laser exposure. (If the equipment operates in a relatively clean environment, the inspection interval may be extended to one month or longer.)

Cooling water purity is critical for maintaining laser output efficiency and prolonging the lifespan of the laser focusing cavity components. Conduct weekly checks of the internal circulation water's conductivity, ensuring it remains below 30.5 mS/cm. Replace the internal circulation deionized water monthly, with newly added pure water exhibiting conductivity below 32 mS/cm. Regularly monitor the color change of the ion exchange column in the cooling system. If the resin inside the column turns dark brown or black, replace it immediately.

Operators should frequently inspect the laser output spot using black photographic paper. If uneven spots or reduced energy are detected, promptly adjust the laser resonator cavity to maintain beam quality. Exemplary spot patterns: Adjusted spot Unadjusted spot Laser resonator adjustment Warning: This product is a Class 4 laser device. Direct exposure to intense laser radiation can cause severe injury to human skin, particularly causing permanent eye damage. Operators must possess laser safety knowledge and wear specialized laser safety goggles rated for 1.064 μm wavelength during operation.

Caution: Direct intense laser exposure to combustible materials like wood may ignite flames. During setup, place a high-absorptivity black metal material as a beam terminator in the laser output path to prevent fire hazards. Caution: Laser adjustment must be performed by specially trained personnel. Improper adjustment may cause laser imbalance or misalignment, potentially damaging other optical components. Laser resonator adjustment steps: Verify the reference light source: The red semiconductor laser serves as the baseline for the entire optical path and must be confirmed first. Use a simple height gauge to check if the red light is parallel to the top surface of the optical mount rail and centered between the two rails. Adjust using the six mounting screws if misalignment occurs. After adjustment, recheck that all screws are fully tightened.

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