Multifunctional welding tool for engine exhaust pipe machining

The utility model discloses a multifunctional welding tool for machining an engine exhaust pipe. The multifunctional welding tool comprises a welding tool body. A moving seat; the first electric push rods are oppositely arranged in the moving seat in the width direction; the side, close to the movable base, of the fixed clamping plate is fixedly connected with one end, in the extending direction, of the first electric push rod, and the first electric push rod can drive the fixed clamping plate to horizontally move in the opposite direction. According to the scheme, the first electric push rods oppositely arranged on the side face of the movable base synchronously contract, the first electric push rods drive the fixed clamping plates to be away from the surface of the exhaust pipe, and at the moment, a motor drives a driving gear to rotate, so that a driven gear can synchronously rotate, and an overturning column installed in a connecting base is driven to rotate; and therefore, the effect of automatic overtur