Rotatable positioning device for welding shaft parts

The utility model relates to the technical field of shaft parts, and discloses a rotatable positioning device for welding shaft parts, which comprises a mounting box, a two-way screw rod is rotatably connected between the inner side walls of the mounting box through a bearing, and the outer surface of the two-way screw rod is in threaded connection with a screw rod sleeve. And clamping plates are fixedly mounted on the upper surfaces of the two lead screw sleeves, cross rods are arranged on the outer surfaces of the two clamping plates in a penetrating and inserting mode, and the cross rods are rotationally connected with the clamping plates through bearings. According to the rotatable positioning device for welding the shaft parts, the threaded rod is arranged, the threaded rod is rotated, so that the threaded sleeve moves in the direction of the threaded rod, the threaded sleeve drives the clamping plates movably connected with the connecting rod to move in the direction of the telescopic rod in an opposite