Turning tool for thin-wall shell type parts

The utility model relates to the technical field of machining, and discloses a thin-wall shell part turning tool which comprises an expansion tool, the expansion tool comprises a clamping part, the right side of the clamping part is fixedly connected with an inner circle supporting shaft, the middle of the periphery of the inner circle supporting shaft is fixedly connected with an end face supporting table, and the end face supporting table is fixedly connected with an end face. An inner top face supporting table is arranged in the middle of the right side of the inner circle supporting shaft, a step face supporting table is arranged on the edge of the right side of the inner circle supporting shaft, an adjusting gap is formed in the inner circle supporting shaft, an adjusting shrinkage groove is formed in the middle of the periphery of the clamping part, and a part is arranged on the right side of the expansion tool. The bottom of the expansion tool is in threaded connection with a supporting bolt. The whole