Novel special machine for molding circular shell pipe orifice

The utility model provides a novel circular shell pipe orifice forming special machine, and belongs to the technical field of circular pipe machining. The novel special machine for forming the circular shell pipe orifice comprises a shaping assembly and a rotating assembly. The shaping assembly comprises a frame, a limiting piece, a scaling piece, outer mold petals and inner mold petals, the limiting piece and the scaling piece are fixedly connected with the frame, the outer mold petals and the inner mold petals are distributed in a circular array mode with the scaling piece as the circle center, all the outer mold petals are movably connected with the scaling piece and the limiting piece, and all the inner mold petals are movably connected with the scaling piece and the limiting piece. The rotating assembly comprises a driving piece and a clamping ring, and the driving piece is fixedly connected with the frame. In the device, the shaping assembly can be used for expanding and compressing the inner wall and t