Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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A Study on Dimension Optimization of Injection-molded Automotive Bumper by Six Sigma

6시그마를 이용한 자동차 범퍼의 치수 최적화에 대한 연구

  • Kim, Joo-Kwon (Department of Mechanical Engineering, Pukyong National Univ.) ;
  • Kim, Jong-Sun (Molds and Dies Technology Group, Korea Institute of Industrial Technology) ;
  • Lee, Jun-Han (Molds and Dies Technology Group, Korea Institute of Industrial Technology) ;
  • Kwak, Jae-Seob (Department of Mechanical Engineering, Pukyong National Univ.)
  • 김주권 (부경대학교 기계공학과) ;
  • 김종선 (한국생산기술연구원 금형기술그룹) ;
  • 이준한 (한국생산기술연구원 금형기술그룹) ;
  • 곽재섭 (부경대학교 기계공학과)
  • Received : 2017.09.26
  • Accepted : 2017.11.22
  • Published : 2017.12.31
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Abstract

In this study, the optimization of the overall dimensions of an automobile bumper was investigated through CAE and experiment using the Six Sigma method and design of experiment (DOE) method, respectively. Injection pressure, injection speed, injection time, cooling time, holding time, injection temperature, and holding pressure were selected as the vital parameters affecting the overall width of product through analysis of trivial many using CAE. The optimal values were determined using the DOE method, and we analyzed the improvement by applying the optimal conditions to the production process. As a result, the mean value of the overall width was close to the target value, with a deviation of 0.05mm, and the processability and I-MR control were remarkably improved. Finally, the dimension pass rate of the product improved by 20%.

Keywords

References

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