| 摘要 |
A method of manufacturing a gear (20") includes providing a rim gear (14"), a hub (10") and a core (12"), wherein the core (12") is annular and has a core forging temperature below a hot hardness temperature of the rim gear (14") and the hub (10"). The rim gear (14") and the hub (10") are rotated about an axis relative to the core (12"). During the relative rotation, the rim gear (14") and the hub (10") are in contact with the core (12") to generate friction heat to raise an interface temperature of the core (12") to the core forging temperature. The hub (10") is driven into the core (12") to upset a first portion of the core (12") into an outer annular groove defined in a first faying surface of the hub (10"). The rim gear (14") is driven over the core (12") to upset a second portion of the core (12") into an inner annular groove defined in a second faying surface of the rim gear (14"). |
