Welding device for automobile post-treatment spraying base and clamshell assembly

The utility model discloses a welding device for an automobile aftertreatment spraying base and a clamshell assembly, and belongs to the technical field of automobile parts. The spraying device comprises a bottom plate, a spraying base mounting piece and a clamshell assembly large-end mounting piece. The injection base mounting part is connected with the bottom plate in a sliding manner, and the injection base mounting part can be connected with the injection base in a matched manner to mount the injection base; the clamshell assembly large-end mounting piece is connected with the bottom plate in a sliding manner, and the clamshell assembly large-end mounting piece can be connected with the clamshell assembly large end in a matched manner to mount the clamshell assembly large end; the bottom plate is provided with a clamshell assembly small end positioning mechanism, the clamshell assembly small end positioning mechanism is arranged between the spraying base installation part and the clamshell assembly large