As we all know, laser has the characteristics of "good monochromaticity, high directionality, high coherence and high brightness". Laser welding is also a process in which the light emitted by a laser is used. After optical processing, the laser beam is focused to generate a beam of huge energy, which is irradiated to the welding part of the material to be welded and melted to form a permanent connection.
But there are also many people who will encounter various questions during use, the following is our summary of these questions.
1. Hand-held welding machine welding slag splash how to do？
In the process of laser welding, the molten material splashes everywhere and adheres to the surface of the material, causing metal particles to appear on the surface and affecting the appearance of the product.
Cause of the problem: The splash may be caused by too much power leading to too fast melting, or because the surface of the material is not clean, or the gas is too strong.
Liberation method: 1. Adjust the power appropriately;
2. Pay attention to the cleanliness of the material surface;
3. Reduce the gas pressure
2. What to do if the welding seam of the hand-held welding machine is too large？
During welding, it will be found that the weld seam is significantly higher than the conventional level, resulting in the weld seam being enlarged and looking very unsightly.
The cause of the problem: 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.
3. What to do when the offset position of the hand-held welding machine is welded？
When welding, it is not solidified at the structural joint, and the positioning is not accurate, which will lead to complete failure of the welding.
The cause of the problem: the positioning is not accurate during welding; the position of the wire feeding and the laser irradiation is 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.
4. What is the reason why the color of the weld seam is too dark when welding with a hand-held welding machine？
When welding stainless steel, aluminum alloy and other materials, the color of the weld is too dark, which will cause a strong contrast between the weld and the surface of the material, which will greatly affect the appearance.
Cause of the problem: 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
5. What is the reason for the uneven fillet weld formation during welding?
When welding inner and outer corners, the speed or posture is not adjusted at the corners, which will easily lead to uneven welding at the corners, which not only affects the welding strength, but also affects the beauty of the weld.
Cause of the problem: The welding posture is inconvenient.
Solution: Adjust the focus offset in the laser control system, so that the hand-held laser head can carry out welding operations on the side.
6. What to do if the weld seam is sunken during welding？
Depression at the welded joint will result in insufficient welding strength and unqualified products.
Cause of the problem: The laser power is too large, or the laser focus is set incorrectly, which causes the molten pool to be too deep and the material to be melted excessively, which in turn causes the weld to sink.
Solution: 1. Adjust the laser power;
2. Adjust the laser focus
7. What to do if the thickness of the weld seam is uneven during welding？
The weld is sometimes too large, sometimes too small, or sometimes normal.
Cause of the problem: 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, ground wire, etc.
8. What is an undercut?
Undercut refers to the poor combination of the weld and the material, and the occurrence of grooves and other conditions, thus affecting the welding quality.
Cause of the problem: The welding speed is too fast, so that the molten pool is not evenly distributed on both sides of the material, or the material gap is large and the filling material is insufficient.
Solution: 1. Adjust the laser power and speed according to the strength of the material and the size of the weld;
2. Carry out filling or repair work in the later stage.
Post time: Dec-12-2022
