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Development of the Sub Gear for the Scissors Gear System for Automobile Engines
Nakazawa Katsuhito,Nagata Toshihiko,Motooka Naoki 한국분말야금학회 2006 한국분말야금학회 학술대회논문집 Vol.2006 No.1
P/M enables the economical production of components for many kinds of gears. Functionally, the sub gear requires high tooth accuracy and bending fatigue strength. The whole tooth profile was sized after sintering to satisfy the gear tooth accuracy specification. The part was redesigned to reduce machining requirements. The required bending fatigue strength was achieved through appropriate material choice and induction of compressive residual stress by shotpeening after carburizing. The P/M sub gear replaced a forged steel gear, satisfied performance requirements, expanded the use of P/M applications and provided over 30% cost reduction.