기능창을 이용한 박판성형의 공정 최적화Application of Operating Window to Robust Process Optimization of Sheet Metal Forming
- Other Titles
- Application of Operating Window to Robust Process Optimization of Sheet Metal Forming
- Authors
- 김경모; Yong S. Suh; 인정제
- Issue Date
- 2009
- Publisher
- 한국기계가공학회
- Keywords
- Sheet metal forming; Operating window; Conflicting defects; Robust design; Process optimization
- Citation
- 한국기계가공학회지, v.8, no.4, pp.110 - 121
- Journal Title
- 한국기계가공학회지
- Volume
- 8
- Number
- 4
- Start Page
- 110
- End Page
- 121
- URI
- https://scholarworks.bwise.kr/kumoh/handle/2020.sw.kumoh/2852
- ISSN
- 1598-6721
- Abstract
- It is essential to embed product quality in the design process to win the global competition. Many components found in many products including automobiles and electronic devices are fabricated using sheet metal forming processes. Wrinkle and fracture are two types of defects frequently found in the sheet metal forming process. Reducing such defects is a hard problem as they are affected by many uncontrollable factors. Attempts to solve the problem based on traditional deterministic optimization theories are often led to failures. Furthermore, the wrinkle and fracture are conflicting defects in such a way that reducing one defect leads to increasing the other. Hence, it is a difficult task to reduce both of them at the same time. In this research, a new design method for reducing the rates of conflicting defects under uncontrollable factors is presented by using operating window and a sequential search procedure. A new SN ratio is proposed to overcome the problems of a traditional SN ratio used in the operating window technique. The method is applied to optimizing the robust design of a sheet metal forming process. To show the effectiveness of the proposed method, a comparison is made between the traditional and the proposed methods using simulation software, applied to a design of particular sheet metal forming process problem. The results show that the proposed method always gives a more robust design that is less sensitive to noises than the traditional method.
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