Forming device and forming method of annular part

The invention relates to the technical field of manufacturing and forming, and provides a forming device and a forming method for a thin-walled annular part. The forming device structurally comprisesa fixed seat, a driving roller, a forming roller and a driving part, wherein the the driving roller and the forming roller are movably connected with the fixed seat, the forming roller is nested in aninner cavity of the driving roller, and the driving part is in driving connection with the forming roller through the driving roller; and the forming device further comprises a core roller which performs feeding motion in the radial direction of the forming roller. According to the forming device of a revolving body, the problem that a thin-walled revolving body is difficult to form is solved, the production of the thin-walled revolving body is realized, the problem of plastic instability is solved, and the limitation on the wall thickness of a thin-walled part is broken through. 本发明涉及制造成型的技术领域，提供一种用于薄壁的环形件的成型装置及成型方法，