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반응표면모델과 공정능력지수를 적용한 로워암의 공차최적화
이광기(Kwang Ki Lee),노윤철(Yun Chul Noh),한승호(Seung Ho Han) (사)한국CDE학회 2013 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2013 No.1
In the lower arm design process, a tolerance optimization of the variance of design variables should be preceded before manufacturing process, since it is very cost-effective rather than a strict management of tolerance of products. In this study, a design of experiments based response surface model was carried out to find optimized design variables which can meet a given requirement of probability constraint for the process capability index of the weight and maximum stress for the lower arm. The design space was explored by using the central composite design method and the 2nd order Taylor expansion to predict a standard deviation of the design variables. The optimal solutions satisfying the probability constraint of the process capability index were founded by considering both of mean value and standard deviation of the design variables.