Welding equipment for middle trough of coal mine machine

The invention provides welding equipment for a middle trough of a coal mine machine. The welding equipment comprises a travelling track, a clamping and positioning mechanism, a driving mechanism, a vertical plate feeding mechanism, a rail chair feeding mechanism, a rail chair feeding robot, a vertical plate feeding robot, point welding manipulators, a bearing mechanism and full-welding manipulators, wherein the rail chair feeding robot, the vertical plate feeding robot and the point welding manipulators are all arranged at a spot welding station, the point welding manipulators are arranged onthe two sides of the travelling track in an opposite staggered manner, the vertical plate feeding mechanism is located on one side of the vertical plate feeding robot, the rail chair feeding mechanismis located on one side of the rail chair feeding robot, the driving mechanism is connected with the clamping and positioning mechanism and is movably connected with the travelling track, the two full-welding manipulators are