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1) The position of the weldment must be accurate and should be controlled in the focus range of the laser beam.
2) When the weldment should be fixed on the fixture, its final position should be accurate at the weld.
4) High reflectivity and high thermal conductivity materials will change laser welding, such as aluminum, copper and their alloys.
5) When laser beam welding of medium and high energy is to be achieved, a plasma controller should be used to eliminate the molten pool around the ionized gas to ensure the reproducibility of qualified welding.
6) The energy conversion efficiency is too low, usually less than 10%.
7) Welding is set by flash, there may be porosity and embrittlement problems.
8) Laser welding machines are relatively expensive.