MANUFACTURING METHOD OF HOLLOW INGOT AND FORGING METHOD OF RING IN USING THE HOLLOW INGOT

摘要

PURPOSE: A manufacturing method of a hollow ingot and a ring forging method of a hollow ingot using the same are provided to improve the productivity by reducing the manufacturing time and the process loss of raw material. CONSTITUTION: A manufacturing method of a hollow ingot and a ring forging method of a hollow ingot using the same comprise the following steps. A table is installed in the floor side(S110). The core of a cylindrical shape is installed on the table(S120). The molten metal is provided the mold inside by injecting the molten metal to the table(S160). The heating material is supplied to the upper part of mold and the molten metal is heated(S170). After cooling the molten metal by injecting the air into a core, an ingot main body is formed(S180). The mold installed at the outer circumference of the ingot main body and the core installed at the inner circumference are eliminated and a hollow ingot is formed(S190).