Clamping device for welding gas inlet cavity and DOC assembly for automobile exhaust treatment

The utility model belongs to the field of automobile component welding and clamping application equipment, and particularly relates to a clamping device for welding a gas inlet cavity and a DOC component for automobile exhaust treatment, which comprises a supporting table, a supporting frame is arranged at the upper end of the supporting table, and a positioning disc is arranged at the upper end of the supporting frame. A positioning disc is arranged on one side of the upper end of the supporting frame, a positioning adaptive block is arranged at the corner of the upper end of the positioning disc, an edge pressing clamping device is arranged on the periphery of the positioning disc, an end clamping device is further arranged on one side of the upper end of the supporting frame, and a pneumatic control handle is arranged at the corner of the rear end of the supporting table. The clamping device is reasonable in design, simple in structure, convenient to machine and capable of effectively replacing manual work