1. Excessive laser power: When the laser power of the laser welding machine is set too high, the local temperature of the welding area will be too high, leading to gasification and fire. At this time, it is necessary to reduce the laser power or increase the focusing diameter of the beam.
2. There is pollution or coating on the surface of welding object: If there is pollution, oxide layer or coating on the surface of welding object, it will affect the absorption of laser energy, resulting in insufficient heat generated during welding, resulting in poor quality of solder joints and fire. At this time, the welding surface should be cleaned and kept clean and pollution-free to ensure the full absorption and conversion of laser energy.
3. Equipment failure: The damage or failure of some parts in the laser welding machine, such as lens pollution and optical fiber damage, may lead to fire during welding. At this time, check whether the key components in the equipment are damaged or faulty, and repair or replace the relevant components in time.
Solution: When operating the laser welding machine, attention should be paid to the operation details, such as adjusting the laser power to a suitable range according to the welding materials and requirements to avoid excessive laser energy from damaging the lens; Clean the welding surface and keep it clean and pollution-free to ensure the full absorption and conversion of laser energy; Check whether the key components in the equipment are damaged or faulty, and repair or replace the relevant components in time; Pay attention to the maintenance of the laser welding machine, regularly clean the optical components and adjust the optical path.