Abstract: Disclosed therein are an apparatus and method for manufacturing a sprocket segment, which can manufacture the sprocket segment through a simplified process including hot precision forging, through hardening and painting, thereby reducing manufacturing period and cost and securing competitive power. The sprocket segment manufacturing method includes: a primary hot forging process of putting a heated billet in a booster die (10) mounted on a forging press to perform a distribution of volume; a secondary hot forging process of putting the hot forged material (M) in a blocker die (11) to form a rib face (4); a tertiary hot forging process of putting the secondarily hot forged material (M) in a finisher die (12) to keep right angles and planes of a toothed face (6) and the rib face (4); and a process of putting the tertiarily hot forged material (M) in a product guide die (22) of a trimming-piercing-coining die (13) to eliminate a flash and form bolt holes (7) simultaneously.

Abstract: Disclosed therein are an apparatus and method for manufacturing a sprocket segment, which can manufacture the sprocket segment through a simplified process including hot precision forging, through hardening and painting, thereby reducing manufacturing period and cost and securing competitive power. The sprocket segment manufacturing method includes: a primary hot forging process of putting a heated billet in a booster die (10) mounted on a forging press to perform a distribution of volume; a secondary hot forging process of putting the hot forged material (M) in a blocker die (11) to form a rib face (4); a tertiary hot forging process of putting the secondarily hot forged material (M) in a finisher die (12) to keep right angles and planes of a toothed face (6) and the rib face (4); and a process of putting the tertiarily hot forged material (M) in a product guide die (22) of a trimming-piercing-coining die (13) to eliminate a flash and form bolt holes (7) simultaneously.