The utility model discloses a special automatic
welding machine for large elbows, which belongs to the technical field of special
welding machines and comprises a base and a sliding groove, the sliding groove is embedded in the surface of the base, a sliding block is arranged in the sliding groove and slidably connected with the sliding groove, a fixing plate is arranged at the top of the sliding block, a mounting plate is arranged on one side of the fixing plate, and an adjusting groove is embedded in the surface of the mounting plate. Clamping plates are arranged in the adjusting groove, the clamping plates are in sliding connection with the adjusting groove, a first two-way
threaded rod is arranged in the adjusting groove, the first two-way
threaded rod is in threaded connection with the clamping plates, and an adjusting rod is arranged at one end of the first two-way
threaded rod; by means of the sliding groove, the sliding block, the fixing plate, the mounting plate, the adjusting groove, the first two-way threaded rod, the adjusting rod and the clamping plate, an
elbow is fixed, automatic adjustment is achieved according to the type of the
elbow, use is more convenient, the clamping plate can be driven to push the
elbow tightly only by rotating the adjusting rod, time and labor are saved, and the working efficiency is effectively improved.