Ultrasonic diameter-adjustable tumbling device for inner circle of cylindrical workpiece

An ultrasonic diameter-adjustable tumbling device for an inner circle of a cylindrical workpiece comprises a machine tool spindle, an ultrasonic wave generation and transmission part and an ultrasonic vibration part, the machine tool spindle is arranged in the vertical direction, a cutter handle is coaxially arranged at the lower end of the machine tool spindle, and a variable amplitude shaft is coaxially and fixedly connected to the lower end of the cutter handle; the ultrasonic vibration part is arranged in the cutter handle and fixedly connected with the upper end of the variable amplitude shaft, the ultrasonic wave generation and transmission part is connected with the ultrasonic vibration part through a first wire, and the outer diameter adjustable tumbling assembly is arranged on the outer circle of the variable amplitude shaft. The ultrasonic tumbling device has the advantages of being reasonable in structural design, convenient to use and the like, ultrasonic tumbling machining of workpieces with diff