음각 점진성형에서 치수정밀도에 영향을 미치는 형상 파라미터 분석
Analysis of Shaping Parameters Influencing on Dimensional Accuracy in Single Point Incremental Sheet Metal Forming
0
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
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 L8 (27) 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.
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 L8 (27) 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.
참고문헌 (14)
- Ambrogio, G., "Application of Incremental Forming Process for High Customized Medical Product Manufacturing", J. of Material Processing Technology, 162-163, pp.156~162 (2005)
- Ambrogio, G., "On The High-Speed Single Point Incremental Forming of Titanium Alloys", CIRP Annals, 62(1), pp.243~246 (2013)
- Araghi, B. T., "Investigation into A New Hybrid Forming Process :Incremental Sheet Forming Combined with Stretch Forming", CIRP Annals, 58(1), pp.225~228 (2009)
- Cavaler, L. C. C., "Surface Roughness in The Incremental Forming of AISI 304L Stainless Steel Sheets", Far East J. of Mecha-nical Engineering and Physics, 1(2), pp.87~98 (2010)
- 장대흥, "근사직교배열의 직교성을 평가하기 위한 측도로서의 상호정보", 품질경영학회지, 36(3), pp.13~21 (2008), 한국품질경영학회
- Jeswiet, J., "Asymmetric Single Point Incremental Forming of Sheet Metal", CIRP Annals, 54(2), pp.88~114 (2005)
- 강재관, "점진성형에서 형상 정밀도에 영향을 미치는 공정 변수", 산업경영시스템학회지, 38(4), pp.177~183 (2015), 한국산업경영시스템학회
- 이경부, "점진성형에서 형상의 복잡도와 다이의 종류가 성형 정밀도에 미치는 영향", 한국생산제조학회지, 23(5), pp.512~518 (2014), 한국생산제조학회[DOI]
- 이경부, "AL1050 소재의 양·음각 점진성형 공법간 성형 정밀도 비교", 한국생산제조학회지, 22(5), pp.800~805 (2013), 한국생산제조학회[DOI]
- Radu, C., "Effects of Process Parameters on The Quality of Parts Processed by Single Point Incremental Forming", International J. of Modern Manufacturing Technology, 3(2), pp.91~96 (2011)
- Radu, C., "Analysis of The Surface Quality of Parts Processed by Single Point Incremental Forming", J. of Engineering Studies and Research, 19(3), pp.76~79 (2013)
- Wei, H., "Spring-back Investigation on Sheet Metal Incremental Formed Parts", International J. of Mechanical (2011), Industrial, Manufacturing Engineering
- Wen, H., "Research on Influence of Forming Angle on The Single-Point Incremental Forming Accuracy", Forming and Stamping Technology(In Chinese), 40(7), pp.62~67 (2015)
- Wen, H., "Influence of Metal Sheet Incremental Forming Parameters on Spring-back Based on Orthogonal Test", Hot Working Technology(In Chinese), 44(15), pp.109~115 (2015)