Journal of Korean Society of Industrial and Systems Engineering (산업경영시스템학회지)

Society of Korea Industrial and System Engineering (한국산업경영시스템학회)
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Analysis of Shaping Parameters Influencing on Dimensional Accuracy in Single Point Incremental Sheet Metal Forming

음각 점진성형에서 치수정밀도에 영향을 미치는 형상 파라미터 분석

  • Kang, Jae Gwan (School of Mechanical Engineering, Kyungnam University) ;
  • Kang, Han Soo (Department of Advanced Engineering, Kyungnam University) ;
  • Jung, Jong-Yun (School of Industrial Engineering and Naval Architecture, Changwon National University)
  • 강재관 (경남대학교 기계공학부) ;
  • 강한수 (경남대학교 첨단공학과) ;
  • 정종윤 (창원대학교 산업조선해양공학부)
  • Received : 2016.10.31
  • Accepted : 2016.12.15
  • Published : 2016.12.31
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Abstract

Incremental sheet forming (ISF) is a highly versatile and flexible process for rapid manufacturing of complex sheet metal parts. Compared to conventional sheet forming processes, ISF is of a clear advantage in manufacturing small batch or customized parts. ISF needs die-less machine alone, while conventional sheet forming requires highly expensive facilities like dies, molds, and presses. This equipment takes long time to get preparation for manufacturing. However, ISF does not need the full facilities nor much cost and time. Because of the facts, ISF is continuously being used for small batch or prototyping manufacturing in current industries. However, spring-back induced in the process of incremental forming becomes a critical drawback on precision manufacturing. Since sheet metal, being a raw material for ISF, has property to resilience, spring-back would come in the case. It is the research objective to investigate how geometrical shaping parameters make effect on shape dimensional errors. In order to analyze the spring-back occurred in the process, this study experimented on Al 1015 material in the ISF. The statistical tool employed experimental design with factors. The table of orthogonal arrays of $L_8(2^7)$ are used to design the experiments and ANOVA method are employed to statistically analyze the collected data. The results of the analysis from this study shows that the type of shape and the slope of bottom are the significant, whereas the shape size, the shape height, and the side angle are not significant factors on dimensional errors. More error incurred on the pyramid than on the circular type in the experiments. The sloped bottom showed higher errors than the flat one.

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References

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