A　laser　vision　sensing　based　on　the　adaptive　tungsten　inert　gas　(TIG)　welding　system　for　large-scale　aluminum　alloy　components　was　established　to　fit　various　weld　groove　conditions.　A　new　type　of　laser　vision　sensor　was　used　to　precisely　measure　the　weld　groove.　The　joint　geometry　data,　such　as　the　bevel　angle,　the　gap,　the　area,　and　the　mismatch,　etc.,　aided　in　assembling　large-scale　aerospace　components　before　welding.　They　were　also　applied　for　automatic　seam　tracking,　such　as　automatic　torch　transverse　alignment　and　torch　height　adjustment　in　welding.　An　adaptive　welding　process　was　realized　by　automatically　adjusting　the　wire　feeding　speed　and　the　welding　current　according　to　the　groove　conditions.　The　process　results　in　a　good　weld　formation　and　high　welding　quality,　which　meet　the　requirements　of　related　standards.　©　Higher　Education　Press　2007.