echnical principle:

this technology belongs to fusion welding and uses laser beam as energy to impact on weld joints. Laser beam can be guided by plane optical element (e.g., mirror), then projected on welding seam by reflecting focus element or lens. Laser welding belongs to non-contact welding, pressurization is not required during operation. However, inert gas has to be used to prevent the melting pool from oxidation. Besides, filler metal is used occasionally. Laser welding and MIG welding can be combined to form laser MIG hybrid welding to realize deep penetration welding. Meanwhile, the heat input is greatly reduced compared with single MIG welding.
Technical characteristics:
Ensure high standard performance and consistency of all welding joints; 
Reasonably set welding strength, thus fully ensure passenger safety.
Application in Chery: