Accurate control method for interference magnitude in conical face interference assembling process

The invention discloses an accurate control method for the interference magnitude in a conical face interference assembling process, and relates to the technical field of nuclear main pumps. The accurate control method mainly aims at accurately controlling the radial interference magnitude during conical face interference matching of a shaft part and a hole part. According to the main technical scheme, the method comprises the steps that the displacement of the hole part which is moved relative to the shaft part in the axial direction is calculated; the shaft part and the hole part are assembled in the normal temperature state; a displacement control part is installed on the end face of the shaft part, a limiting part is installed in the hole part, and the limiting part abuts against the displacement control part; and the hole part and the displacement control part are removed, the hole part is heated and installed to the shaft part, the end face of the shaft part abuts against the limiting part, and the need