自動車排気系部品のスピニング加工での不具合発生要因のCAE成形解析

摘要

フェライト系ステンレス鋼を用いて，ワーク固定•工具回転式スピニング加工の実験およびシミュレーション計算によりスピニング加工に伴う種々の不具合事象について以下の知見を得た.%The experiments were conducted on pipe diameter reduction by spinning forming process with ferritic stainless steels. The target shapes of this study are the automotive exhaust parts, such as catalytic converters or sub-mufflers. Effects of the several forming condition factors on the geometrical property or defects of the parts are clarified. Computer aided engineering (CAE) simulation model was also developed for spinning forming. The calculated results were in good agreement with actual specimens not only in thickness distribution but also in shape of buckling defect. The results suggest that CAE simulation could be a helpful tool to obtain optimum forming conditions.