Rotary welding tool for plunger pump cylinder body

The utility model discloses a rotary welding tool for a plunger pump cylinder body. The tool comprises the cylinder body (4). The upper end face of the cylinder body (4) is provided with a circle of circular holes needing to be welded. The cylinder body (4) is coaxially installed on a cylinder body fixed disc (2) which is installed on a rotary bottom disc (1). The distance between the axis of the cylinder body fixed disc (2) and the axis of the rotary bottom disc (1) is equal to the distance between the axis of the cylinder body (4) and the circle center of the circular holes. Due to the fact that the cylinder body fixed disc and the rotary bottom disc are eccentrically installed, the axis of the cylinder body circular holes and the axis of the rotary bottom disc coincide, in this way, a welding gun can be fixed, and one-circle welding is achieved on the circle through rotation of the bottom disc.