Evaluation of Parts Produced by a Novel Additive Manufacturing Process

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Rapid prototyping refers to building three dimensional parts in a tool-less, layer by layer manner using the CAD geometry of the part. Additive Manufacturing (AM) is the name given to the application of rapid prototyping technologies to produce functional, end use items. Since AM is relatively new area of manufacturing processes, various processes are being developed and analyzed for their performance (mainly speed and accuracy). This paper deals with the design of a new benchmark part to analyze the flatness of parts produced on High Speed Sintering (HSS) which is a novel Additive Manufacturing process and is currently being developed at Loughborough University. The designed benchmark part comprised of various features such as cubes, holes, cylinders, spheres and cones on a flat base and the build material used for these parts was nylon 12 powder. Flatness and curvature of the base of these parts were measured using a coordinate measuring machine (CMM) and the results are discussed in relation to the operating parameters of the process.The result show changes in the flatness of part with the depth of part in the bed which is attributed to the thermal gradient within the build envelope during build.

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April 2013

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[1] Steve Upcraft and Richard Fletcher, Rapid prototyping technologies, Assembly Automation, Volume 23, Number 4(2003), p.318–330.

DOI: 10.1108/01445150310698634

Google Scholar

[2] Neil Hopkinson and Phill Dickens, Rapid prototyping for direct manufacture, Rapid Prototyping Journal, Volume 7, Number 4(2001), pp.197-202.

DOI: 10.1108/eum0000000005753

Google Scholar

[3] Neil Hopkinson and Phill Dickens, Analysis of rapid manufacturing-using layer manufacturing processes for production, Proceedings of Institute of Mechanical Engineers, Volume 217, Part C, pp.31-39.

Google Scholar

[4] Neil Hopkinson & Poonjolai Erasenthiran, High Speed Sintering – Early research into a new rapid manufacturing process, Solid Freeform Fabrications Proceedings, The University of Texas at Austin, 2004, pp.312-320.

Google Scholar

[5] N. Hopkinson, R.J.M. Hague and P.M. Dickens, Rapid manufacturing: an industrial revolution for the digital age, Wiley, (2005).

DOI: 10.1002/0470033991

Google Scholar

[6] J. P. Kruth, Material incress manufacturing by rapid prototyping techniques, CIRP Annals, Vol. 40, Number 2, 1991, p.1603 – 1615.

DOI: 10.1016/s0007-8506(07)61136-6

Google Scholar

[7] G. Lart, Comparison of rapid prototyping systems, Proceedings of First European Conference on Rapid Prototyping, University of Nottingham, July 1992, p.243 – 254.

Google Scholar

[8] Gargiulo, E.P., Stereolithography process accuracy: user experience, Proceedings of the 1st European Conference on Rapid Prototyping, 6-7 July (1992), University of Nottingham, UK, pp.187-207.

Google Scholar

[9] N. P. Juster, T. H. C. Childs, Linear and geometric accuracies from layer manufacturing, CIRP annals, Vol. 43, Number 1, 1994, p.163 – 166.

DOI: 10.1016/s0007-8506(07)62187-8

Google Scholar

[10] N. P. Juster, T. H. C. Childs, A comparison of rapid prototyping processes, Proceedings of Third European Conference on Rapid Prototyping and Manufacturing, University of Nottingham, July 1994, p.35 – 52.

Google Scholar

[11] NR. Ippolito, L. Iuliano, A. de Filippi, A new user part for performance evaluation of rapid prototyping systems, Proceedings of Third European Conference on Rapid Prototyping and Manufacturing, University of Nottingham, July 1994, p.327 – 339.

Google Scholar

[12] Ippolito, R., Iuliano, L. and Gatto, A., A benchmarking of rapid prototyping techniques in terms of dimensional accuracy and surface finish, CIRP Annals, Vol. 44 No. 1 (1995), pp.157-160.

DOI: 10.1016/s0007-8506(07)62296-3

Google Scholar

[13] M. Shellabear, Benchmarking study of accuracy and surface quality in RP models, RAPTEC, Task 4. 2, Report 2, (1999).

Google Scholar

[14] M. Mahesh, Y. S. Wong, Y. H. Fuh, H. T. Loh' Benchmarking for comparative evaluation of RP systems and processes, Rapid Prototyping Journal, Vol. 10, Number 2, 2004, p.123 – 135.

DOI: 10.1108/13552540410526999

Google Scholar

[15] Y. S. Wong, Y. H. Fuh, H. T. Loh, M. Mahesh, Rapid prototyping and manufacturing benchmarking, in Sofwtare Solutions for RP, 1st Edition, Editor: I. Gibson, 2002, 57 – 94.

Google Scholar

[16] Dimitrov, D., van Wijck, W., Schreve, K. and de bear, N., Investigating the achievable accuracy of three dimensional printing, Rapid Prototyping Journal, Volume 12, Number 1(2006), p.42–52.

DOI: 10.1108/13552540610637264

Google Scholar

[17] Dimitrov, D., Schreve, K. and de bear, N., Advances in three dimensional printing – state of the art and future perspectives, Rapid Prototyping Journal, Volume 12, Number 3(2006), p.136–147.

DOI: 10.1108/13552540610670717

Google Scholar

[18] T. B. Sercombe and N. Hopkinson, Process shrinkage and accuracy during indirect laser sintering of Aluminum, Advanced Engineering Materials, Vol. 8, Number 4, 2006, p.260 – 264.

DOI: 10.1002/adem.200500265

Google Scholar