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Common faults and treatment methods of laser welding machine

Time:2020-11-19 Views:183

The laser welding machine will have some failures more or less during the use process. Of course, any machine has the possibility of failure. In order to make the laser welding machine work better, reduce the number of failures and increase work efficiency, We must understand the working principle of laser welding machine. Below, the technicians of Minglei Laser Equipment will explain the common faults and treatment methods of laser welding machine:

  Fault 1. The welding seam is very dark when the laser welding machine is welding

   1. If the nitrogen is not turned on, it can be solved by turning on the nitrogen. 

  2. The airflow direction of the shielding gas is wrong, so the airflow direction of the shielding gas should be opposite to the movement direction of the workpiece. 

  Fault two, the laser welding machine cracks during welding 

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

  2. If the fit clearance between the workpieces is too large or there are burrs, the machining accuracy of the workpieces should be improved. 

  3. The workpiece is not cleaned. In this case, the workpiece needs to be cleaned again. 

  4. If the flow of protective gas is too large, it can be solved by reducing the flow of protective gas. 

  Fault 3. The penetration depth of the laser welding machine is not enough.

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

  2. The focus lens defocus amount is wrong, adjust the defocus amount to close to the focus position. 

  Fault 4, the flame weakens when the laser welding machine is welding  

   1. The shutter is not fully opened. Check and add lubricating oil on the shutter connector to make the connector mechanically smooth.

  2. The main optical path laser offset, adjust the main optical path total and semi-reflective diaphragms, use photo paper to check and adjust the round 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 and cleaning the UV glass tube and xenon lamp. 

  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. 

   5. If the focusing lens or laser resonator diaphragm is damaged or contaminated, it should be replaced or cleaned in time.

   When the laser welding machine fails, we can refer to the above content for operational inspection. If there is a problem that cannot be solved, please consult Minglei laser technicians online


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