With the development and application of laser technology, laser welding machines are widely used in various equipment in life. Such as stainless steel kitchen cabinets, stair guardrails, shelves, stainless steel windows, etc. need to be combined with laser welding technology. However, any machine may fail during use, and laser welding machines are no exception.

 

In order to make the laser welding machine work better, reduce the number of machine failures and increase work efficiency, we must understand the working principle of the laser welding machine. This post introduces the common faults of laser welding machines and their solutions.

 

Black seam when laser welding machine welds metal:

One reason is that the nitrogen is not turned on, and it can be solved by turning on the nitrogen. Another reason is that the gas flow direction of the shielding gas is wrong. At this time, the gas flow direction of the shielding gas should be opposite to the movement direction of the workpiece.

 

Cracks appear when laser welding machine welds metal:

1. If the cooling speed of the workpiece is too fast, the temperature of the cooling water on the fixture should be adjusted to increase the water temperature.

2. There are contaminants on the surface of the workpiece. In this case, the workpiece needs to be cleaned again.

3. If the flow rate of the shielding gas is too large, the flow rate of the shielding gas can be reduced to solve the problem.​​

 

Laser welding machine welding penetration is not enough

1. If the laser energy is not enough, it can be solved by increasing the pulse width and increasing the current.

2. The defocus amount of the focusing lens is incorrect, and the defocus amount should be adjusted to a position close to the focus.

 

The flame is weakened when the laser welding machine welds

1. If the focusing lens or the resonator diaphragm of the laser is damaged or polluted, it should be replaced or cleaned in time.

2. The main optical path laser shifts, adjusts the main optical path total reflection and semi-reflection film, uses image paper to check and adjusts the light spot.

3. If the cooling water is polluted or the cooling water has not been replaced for a long time, it can be solved by replacing the cooling water.​​

4. The laser is not output from the center of the copper gas nozzle under the focusing head. Adjust the 45-degree reflective diaphragm to make the laser output from the center of the gas nozzle.​​

 

When the laser welding machine fails, you can refer to the above contents for operation inspection.