Special turning clamp and precision machining method for heterogeneous rotary body thin-wall part

The invention discloses a special turning clamp for a heterogeneous rotary body thin-wall part and a precision machining method, and relates to the technical field of special turning clamps for rotary bodies, the special turning clamp comprises a conical two-stage telescopic servo hydraulic system, an inner supporting module and an outer clamping module, the inner supporting module is connected with a machine tool through a left end pull rod, a first-stage cavity and a second-stage cavity are formed in the inner supporting module, an inner cylinder barrel and a piston rod are installed in the first-stage cavity and the second-stage cavity in the axial direction in a sliding mode, and the inner supporting module comprises an inner wall supporting mechanism and a selectable rib plate supporting mechanism. The special clamp for turning the heterogeneous rotary body thin-wall part is compact in structure, the thin-wall part is positioned and clamped in a multifunctional mode through outer clamping, inner supporti