Automatic control device of transverse motion

The invention relates to a transverse swinging automatic control device which is arranged between a pipe fitting welding torch and a mounting plate and consists of a swinging arm, a locating shaft, a screw rod and a drive motor; the locating shaft, the screw rod and the main shaft of the drive motor are arranged on the mounting plate side by side, one end of the swinging arm is fixed with the welding torch, the other end thereof is movably sheathed on the locating shaft by a rotating shaft sleeve in a perforation manner, the main shaft of the drive motor and the screw rod are respectively provided with two gears which can be meshed with each other for transmission, meanwhile, the screw rod is sheathed with a nut by screwing, the nut is provided with a limit lug and can extend into a limit groove on a corresponding part of the external peripheral surface of the rotating shaft sleeve; the transverse swinging automatic control device provided by the invention can automatically control the swinging arm, together