Telescopic welding forming device

The utility model relates to the technical field of welding forming, and discloses a telescopic welding forming device which comprises a base, one side of the upper surface of the base is fixedly connected with a fixing plate, the middle of the fixing plate is rotationally connected with a connecting cylinder, the outer wall of the connecting cylinder is fixedly connected with a driven gear, the driven gear is meshed with a driving gear, and the driving gear is meshed with the fixing plate. And one side of the driving gear is fixedly connected to the output end of a first motor, and one side of the first motor is fixedly connected to the upper surface of the base. According to the steel pipe polishing device, a first motor is started to drive a driving gear to rotate, then a driven gear is driven to rotate, a connecting cylinder is driven to rotate, the connecting cylinder drives a polishing cylinder to rotate, so that a steel pipe can be polished, and when the polishing effect of the polishing cylinder is re