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.
Reasonably set welding strength, thus fully ensure passenger safety.