On the effect of irradiance on dimensional accuracy in multijet fusion additive manufacturing
| Autor: | Giampaolo Campana, Mattia Mele, Gian Luca Monti |
|---|---|
| Přispěvatelé: | Mele Mattia, Campana Giampaolo, Monti Gian Luca |
| Rok vydání: | 2021 |
| Předmět: |
0209 industrial biotechnology
Fusion Materials science Additive manufacturing Mechanical Engineering Irradiance Dimensional accuracy 02 engineering and technology 021001 nanoscience & nanotechnology Measure (mathematics) Industrial and Manufacturing Engineering Degree (temperature) Polyamide 12 Crystallinity 020901 industrial engineering & automation Transformation (function) Multijet fusion Range (statistics) 0210 nano-technology Biological system Energy (signal processing) |
| Zdroj: | Rapid Prototyping Journal. 27:1138-1147 |
| ISSN: | 1355-2546 |
| DOI: | 10.1108/rpj-07-2020-0180 |
| Popis: | Purpose The amount of radiated energy is known to be a crucial parameter in powder-bed additive manufacturing (AM) processes. The role of irradiance in the multijet fusion (MJF) process has not been addressed by any previous research, despite the key role of this process in the AM industry. The aim of this paper is to explore the relationship between irradiance and dimensional accuracy in MJF. Design/methodology/approach An experimental activity was carried out to map the relationship between irradiance and dimensional accuracy in the MJF transformation of polyamide 12. Two specimens were used to measure the dimensional accuracy on medium and small sizes. The experiment was run using six different levels of irradiance. For each, the crystallinity degree and part density were measured. Findings Irradiance was found to be directly proportional to part density and inversely proportional to crystallinity degree. Higher irradiance leads to an increase in the measured dimensions of parts. This highlights a predominant role of the crystallisation degree and uncontrolled peripherical sintering, in line with the previous literature on other powder-bed AM processes. The results demonstrate that different trends can be observed according to the range of sizes. |
| Databáze: | OpenAIRE |
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