Reaming device for numerical control machining

The invention discloses a broaching device for numerical control machining, and relates to the technical field of broaching devices, the broaching device comprises a supporting table, a pair of supporting frames used for supporting a short pipe are fixedly mounted on the supporting table, a limiting sleeve is fixed on a circular truncated cone body, and a lifting cylinder is rotatably mounted on the limiting sleeve; a plurality of radial sliding columns are slidably mounted on the circular truncated cone in the radial direction, polishing blocks facing the inner wall of the short pipe are fixed to the radial sliding columns, an adjusting assembly used for driving the radial sliding columns to slide relative to the circular truncated cone is mounted in the lifting cylinder, and a rotating assembly used for driving the circular truncated cone to rotate is mounted in the lifting cylinder. The two sliding frames can be driven to axially slide and adjust relative to the short pipe through the arranged threaded rod