A. Slag splashing

During the welding process using laser welding machines, the molten material splashes everywhere and adheres to the surface of the material, causing metal particles to appear on the surface, which directly affects the appearance of the product.

Reason: The splash may be caused by excessive power, which causes too fast melting, or it may be caused by the material surface not being cleaned or the gas pressure being high.

Liberation methods: 1. Adjust the power appropriately; 2. Pay attention to the cleanliness of the material surface; 3. Reduce the gas pressure.

B. The weld seam is too high

When welding with fiber laser welding machine, you will find that the weld seam is significantly higher than the normal level, causing the weld seam to become enlarged and look very unsightly.

Reason: The wire feeding speed is too fast, or the welding speed is too slow.

Solution: 1. Reduce the wire feeding speed in the control system; 2. Increase the welding speed.

C. Welding offset

Misalignment during welding and failure to solidify at the structural joints can lead to complete failure of the weld.

Reason: Inaccurate positioning during welding; wire feeding and laser irradiation positions are inconsistent.

Solution: 1. Adjust the laser offset and swing angle in the board; 2. Check whether there is any deviation in the connection between the wire feeder and the laser head.

D. The color of the weld is too dark

When welding stainless steel, aluminum alloy and other materials, if the color of the weld is too dark, there will be a strong contrast between the weld and the surface of the material, which will extremely affect the appearance.

Reason: The laser power is too small, resulting in insufficient combustion, or the welding speed is too fast.

Solution: 1. Adjust the laser power; 2. Adjust the welding speed.

E. Uneven weld formation during corner welding

When using laser welding equipment for inner and outer corner welding, incorrect welding speed or welding posture at the corner can easily lead to uneven welding at the corner, which not only affects the welding strength but also affects the beauty of the weld.

Reason: Wrong welding posture.

Solution: Adjust the focus offset in the laser control system so that the handheld laser head can perform welding operations sideways.

F. Depression at the weld

Depressions in the welded joints will result in insufficient welding strength and substandard quality of the final product.

Reason: The laser power is too high, or the laser focus is set incorrectly, causing the molten pool to be too deep and the material to be over-melted, which in turn causes the weld to be dented.

Solution: 1. Adjust the laser power; 2. Adjust the laser focus.

G. Uneven thickness of weld seam

The weld is sometimes too large, sometimes too small, or sometimes normal.

Reason: There is no problem with light output or wire feeding.

Solution: Check the stability of the laser and wire feeder, including power supply voltage, cooling system, control system, grounding wire, etc.

H. Undercut

Undercut refers to the poor combination of the weld and the material, resulting in grooves and other conditions, which affects the welding quality.

Reason: The welding speed is too fast, resulting in the molten pool not being evenly distributed on both sides of the material, or the gaps in the material being large and the filling material insufficient.

Solution: 1. Adjust the laser power and speed according to the material strength and weld size; 2. Perform filling or repair work later.