Automatic-tracking auxiliary welding device for fillet welds

The invention discloses an automatic-tracking auxiliary welding device for fillet welds. The automatic-tracking auxiliary welding device comprises a main guide beam. An installation plate frame is arranged on the main guide beam. Longitudinal guide rails are symmetrically arranged on the lower portion of the installation plate frame. Longitudinal slide plates are symmetrically installed through the longitudinal guide rails. Lifting cylinders are symmetrically installed on the installation plate frame. The lower ends of cylinder rods of the lifting cylinders are elastically connected with the corresponding longitudinal slide plates. Each longitudinal slide plate is provided with a horizontal cylinder and a horizontal slide block. Transverse slide plates are installed through the horizontal slide blocks. One end of a cylinder rod of each horizontal cylinder is elastically connected with the transverse slide plate on the same side. A welding gun installation sleeve is arranged in front of each transverse slide p