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An Investigation on Process Capability Analysis for Fused Filament Fabrication
Elif Elçin Günay,Anusha Velineni,Kijung Park,Gül E. Okudan Kremer 한국정밀공학회 2020 International Journal of Precision Engineering and Vol.21 No.4
Additive manufacturing (AM) has become a popular manufacturing technology today. Many companies have been investingin AM technologies and skill development to carefully integrate them into their capabilities. Despite its benefi ts, AM hasseveral disadvantages that require in-depth analysis and process engineering. This research focuses on the reproducibilityissue of fused fi lament fabrication (FFF) for polylactic acid printing to reveal whether the AM technology can produce partscomparable to those by traditional or subtractive manufacturing. For this purpose, identifi cation of optimal process parametersand process capability analysis are integrated to achieve repeatable minimum deviation from target dimensions. First,a design of experiments is planned and performed to determine the optimal combination of signifi cant factors to ensuredimensional accuracy. Then, process capability analysis under optimal factor settings is performed to examine whether theprinted part dimensions satisfy the target performance levels. Findings from this study show the FFF process can match thereproducibility of manufacturing parts produced by traditional manufacturing technologies.