Guide vane ceramic core based on core print prefabricated taper hole, positioning method and application

The invention discloses a guide blade ceramic core based on a core print prefabricated taper hole, a positioning method and application, and belongs to the technical field of precision casting of hollow turbine blades of aero-engines. The guide vane ceramic core comprises a guide vane ceramic core body and core heads located at the two ends of the guide vane ceramic core body, and prefabricated taper holes used for positioning the guide vane ceramic core body in a mold are formed in the end faces of the core heads. The positioning method comprises the following steps: designing a geometric structure of a guide vane ceramic core head prefabricated taper hole; preparing a guide vane ceramic core with a core head prefabricated taper hole; the core head prefabricated taper hole is polished and shaped; designing and processing the structure of a core head loose piece of the guide vane wax pattern mold; and carrying out profiling matching positioning on the guide vane ceramic core with the core head prefabricated t