Fully dense components built using selective laser melting exhibit mechanical properties equivalent or even better than those of parts produced by conventional manufacturing [1] [2]. But building components using SLM sometimes requires external support structures. These support structures are necessary for a few reasons: they strengthen and fix the part to the building platform, they conduct excess heat away and they prevent warping or complete build failure. They make non negligible impacts on production yields and costs. These additional structures increase build time, build costs as well as post-processing time and complexity. In order to derive the build optimal orientation susceptible to minimise (eliminate?) the quantity of supports, it is necessary to analyse the component’s geometry and its limitations. Sources of manufacturing defects and build failure [3] |
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References
[1] G. Sun, R. Zhou, J. Lu, and J. Mazumder, “Evaluation of defect density, microstructure, residual stress, elastic modulus, hardness and strength of laser-deposited AISI 4340 steel,” Acta Mater., vol. 84, pp. 172–189, Feb. 2015.
[2] Y. Zhu, D. Liu, X. Tian, H. Tang, and H. Wang, “Characterization of microstructure and mechanical properties of laser melting deposited Ti–6.5Al–3.5Mo–1.5Zr–0.3Si titanium alloy,” Mater. Des., vol. 56, pp. 445–453, Apr. 2014.
[3] F. Calignano, “Design optimization of supports for overhanging structures in aluminum and titanium alloys by selective laser melting,” Mater. Des., vol. 64, pp. 203–213, Dec. 2014.
[4] Wang D, Yang Y, Yi Z, Su X. Research on the fabricating quality optimization of the overhanging surface in SLM process. Int J Adv Manuf Technol 2013;65(9– 12):1471–84.
[5] Frank D, Fadel G. Expert system-based selection of the preferred direction of build for rapid prototyping processes. J Intell Manuf 1995;6(5):339–45.
[6] Allen S, Dutta D. On the computation of part orientation using support structures in layered manufacturing. In: Solid freeform fabrication symposium. Texas, USA: Austin; 1994.
[7] Strano G, Hao L, Everson RM, Evans KE. A new approach to the design and optimisation of support structures in additive manufacturing. Int J Adv Manuf Technol 2013;66(9–12):1247–54
[1] G. Sun, R. Zhou, J. Lu, and J. Mazumder, “Evaluation of defect density, microstructure, residual stress, elastic modulus, hardness and strength of laser-deposited AISI 4340 steel,” Acta Mater., vol. 84, pp. 172–189, Feb. 2015.
[2] Y. Zhu, D. Liu, X. Tian, H. Tang, and H. Wang, “Characterization of microstructure and mechanical properties of laser melting deposited Ti–6.5Al–3.5Mo–1.5Zr–0.3Si titanium alloy,” Mater. Des., vol. 56, pp. 445–453, Apr. 2014.
[3] F. Calignano, “Design optimization of supports for overhanging structures in aluminum and titanium alloys by selective laser melting,” Mater. Des., vol. 64, pp. 203–213, Dec. 2014.
[4] Wang D, Yang Y, Yi Z, Su X. Research on the fabricating quality optimization of the overhanging surface in SLM process. Int J Adv Manuf Technol 2013;65(9– 12):1471–84.
[5] Frank D, Fadel G. Expert system-based selection of the preferred direction of build for rapid prototyping processes. J Intell Manuf 1995;6(5):339–45.
[6] Allen S, Dutta D. On the computation of part orientation using support structures in layered manufacturing. In: Solid freeform fabrication symposium. Texas, USA: Austin; 1994.
[7] Strano G, Hao L, Everson RM, Evans KE. A new approach to the design and optimisation of support structures in additive manufacturing. Int J Adv Manuf Technol 2013;66(9–12):1247–54
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