Welding device for front cone assemblies of stirring tanks

The invention discloses a welding device for front cone assemblies of stirring tanks, and relates to the technical field of manufacturing of special automobiles. The welding device comprises an outerpositioning ring fixed to a platform, a movable positioning ring is mounted on the outer side of the outer positioning ring in a matched mode, and a plurality of guiding blocks are distributed along the circumference of the movable positioning ring; a central shaft is mounted on the platform, and the axis lead of the central shaft coincides with the central line of the outer positioning ring and is perpendicular to the upper end face of the platform, and a fixing plate is arranged on the upper part of the central shaft; a centering shaft is slidably mounted at the upper end of the central shaft in an inserted mode, a positioning plate is arranged on the upper part of the centering shaft, a positioning sleeve movably sleeving the centering shaft is arranged between the positioning plate andthe fixing plate, the pos