| Title |
A Study on Minimizing Heat Accumulation by Supports of Non-uniform Cross Sections Using Macro Heat Transfer Analysis in PBF Additive Manufacturing |
| Authors |
윤석철(Seok-Chul Yun) ; 신재호(Jaeho Shin) ; 김재웅(Jae-Woong Kim) ; 최균석(Kyunsuk Choi) |
| DOI |
https://doi.org/10.5370/KIEE.2024.73.2.412 |
| Keywords |
Additive manufacturing; Powder bed fusion; Heat transfer analysis; Macro-scale analysis |
| Abstract |
In this study, a numerical analysis model was developed for temperature distribution history analysis. To verify the numerical model, the temperature accumulation results analyzed through simulation were compared with the temperature accumulation results for each layer measured with an IR camera. Through temperature distribution history analysis using the commercial program vAMfire/Macro ⓡ, the maximum height at which the maximum temperature is reached in each process according to the change in cross-sectional area was predicted. In addition, the temperature distribution history for each support was analyzed considering general support, wall support, and modified wall support to minimize heat dissipation and heat accumulation. The difference in heat dissipation effect depending on the type of support was quantitatively analyzed. By applying optimal support, we were able to solve the stacking problem caused by heat accumulation. Through heat transfer analysis, it was confirmed that quantitative analysis was possible to solve problems such as lamination failure and thermal deformation. |