MANUFACTURING METHOD FOR OUTER RING OF BALL BEARING AND OUTER RING OF BALL BEARING USING THE SAME

摘要

According to an embodiment of the present invention, a ball bearing manufacturing method comprises: a first step of manufacturing a primary preformed outer ring by forming a body with a penetrated center, a flange radially extended from the body through a hot forging process of heating a material at a predetermined temperature to form a hot forging die, and an outer ring track surface formed on a radial inner surface of the body; a second step of manufacturing a secondary preformed outer ring by thermally treating the entire primary preformed outer ring; a third step of manufacturing a tertiary preformed outer ring by turning an outer circumference of the body and the flange of the secondary preformed outer ring; a fourth step of manufacturing a quaternary preformed outer ring by thermally treating the outer track surface of the tertiary performed outer ring at high frequencies; a fifth step of manufacturing a quinary preformed outer ring by turning the outer circumference of the body and the flange of the quaternary preformed outer ring, and then drilling assembly holes penetrating the flange; and a sixth step of manufacturing an outer ring by super-precisely polishing and smoothing the outer ring track surface of the senary preformed outer ring.