Deflection angle and space point location extraction method for air film cooling hole machining

The invention relates to the technical field of non-traditional machining, in particular to a deflection angle and space point location extraction method for air film cooling hole machining, and the method comprises the steps: creating a special-shaped hole intersecting line of a special-shaped hole and a special-shaped block electrode on a blade profile of a turbine blade design model, and obtaining a straight hole inner surface and the special-shaped hole intersecting line; cylindrical surface axis sections of the inner surfaces of the straight holes are extracted, and fitting curved surfaces of intersecting lines of the special-shaped holes are obtained through profile fitting; and obtaining coordinates of an intersection point of the axis section of the cylindrical surface and the fitting curved surface, determining a space point location of the air film cooling hole of the turbine blade according to the coordinates of the intersection point, calculating a deflection angle of the air film cooling hole acc