Universal device for friction stir welding of battery tray

The utility model relates to the technical field of friction stir welding, in particular to a universal device for friction stir welding of a battery tray. The device comprises a bottom plate, a mounting plate arranged on the bottom plate, a plurality of mounting holes formed in the mounting plate, and a plurality of limiting assemblies matched with the mounting holes to be mounted on the mounting plate, the limiting assembly comprises a plurality of point position supporting modules arranged on the mounting plate, supporting modules arranged on the peripheries of the point position supporting modules, point pressing modules, surface pressing modules and positioning modules arranged on the peripheries of the supporting modules, wherein the point pressing modules and the surface pressing modules are arranged on the peripheries of the supporting modules. The friction stir welding device has the advantages that according to the technical scheme, rapid positioning is carried out by arranging the modularized limit