プレス成形の機能性評価

－品質工学による外観品質問題の解決－

抄録

Due to recent escalation of the new-model development race and diversifying customer needs, the automobile industry faces an increasingly severe environment,in which various measures are being taken to achieve goals in relation of quality level, cost, and development time. For stamped parts, appearance is one of the quality issues. The present practice has been a continuing series of stopgap measures to deal with defects as they occur. To change this situation by applying quality engineering, an attempt was made to establish a robust stamping method that could solve appearance quality problems even without advance CAE validation, and could be applied to any type of vehicle(any part shape). A problem of surface distortion that sometimes appears in front fenders was addressed and an optimal die design and stamping method were found which minimized distortion in parts for any type of vehicle from the initial stampillg with a new die.