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Optimization of Sheet Metal Forming Process by using Decision-Making Theory  

Kim, Kyung-Mo (금오공과대학교 산업공학부)
Yin, Jeong-Je (인덕대학교 기계설계과)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.11, no.2, 2012 , pp. 125-136 More about this Journal
Abstract
Wrinkle and fracture are two major defects frequently found in the sheet metal forming process. In this process there are more than one design attributes to optimize and several uncontrollable factors which cannot be ignored in determining the optimal values of design variables. Therefore, attempts to reduce defects through a traditional optimization technique are often led to failures. In this research, a new design method for reducing the wrinkle and fracture under uncontrollable factors is presented by using decision-making theory. To avoid the psychological difficulties in determining the scaling constants of the multi-attribute utility function by using the ordinary lottery questions, a pair-wise comparison procedure is adapted to avoid this problem. The effectiveness of the proposed method is illustrated through a robust design of sheet metal forming process of a side member of an automotive body.
Keywords
Decision-Making Theory; Robust Design; Utility; Multiple Attribute Utility Function; Sheet Metal Forming;
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