@article{22426, abstract = {{Der Serieneinsatz der additiven Fertigung ist maßgeblich durch die hohen Kosten und der geringen Produktivität der Verfahren limitiert. Der hier vorgestellte Ansatz zeigt, wie die Wirtschaftlichkeit des Laser-Strahlschmelzens (LBM) durch die Kombination mit etablierten Fertigungsverfahren erhöht werden kann. Ziel ist es, nur solche Funktionsträger additiv zu fertigen, die einen höheren Kundennutzen bringen. Dazu werden Konstruktionsrichtlinien definiert, Prozessketten erarbeitet und eine Qualitätssicherung mittels Ultraschallüberwachung realisiert.}}, author = {{Eschner, Niclas and Kopf, Robin and Lieneke, Tobias and Künneke, Thomas and Berger, Dietrich and Häfner, Benjamin and Lanza, Gisela and Zimmer, Detmar}}, isbn = {{2511-0896}}, journal = {{ZWF Zeitschrift für wirtschaftlichen Fabrikbetrieb}}, number = {{7-8}}, pages = {{469--472}}, publisher = {{De Gruyter}}, title = {{{Kombination etablierter und additiver Fertigung: Wirtschaftlicher Einsatz des Laser-Strahlschmelzens (LBM) durch die Kombination mit etablierten Fertigungsverfahren in einer Prozesskette}}}, doi = {{10.3139/104.111751}}, volume = {{112}}, year = {{2017}}, } @inproceedings{22040, abstract = {{Fused Deposition Modeling (FDM) is used for prototypes, single-partproduction and small batch productions of thermoplastic components. This manufacturing technique has the huge benefit that no forming tool is needed. The knowledge about dimensional deviations which occur in the FDM process is necessary for calculating fits and for determining tolerances. A major challenge is the reproducibility of the dimensional accuracy of FDM parts and the reproducibility between different FDM machines. There are many influential factors on the dimensional accuracy in the FDM process for example geometric, material-specific or process-specific factors, which are considered in this paper. The influence of the part position on the build platform of a Stratasys Fortus 400mc is analyzed in terms of the achievable dimensional accuracy. For this purpose, the temperature distribution in the actively heated build chamber is investigated and possible correlations to the dimensional accuracy are identified. The reproducibility of one machine is examined by a multiple production of the test specimens. In addition, a comparison with three other FDM machines from Stratasys is made. Afterwards, the long-term reproducibility of the dimensional accuracy is verified to consider how environmental influences such as maintenance or modification of machine components affect the dimensional accuracy of the FDM process.}}, author = {{Knoop, F. and Lieneke, Tobias and Schöppner, Volker}}, booktitle = {{Rapid Tech - International Trade Show & Conference for Additive Manufacturing}}, pages = {{52--66}}, title = {{{Reproduzierbarkeit der Maßhaltigkeit im Fused Deposition Modeling}}}, doi = {{10.3139/9783446454606.004}}, year = {{2017}}, } @inproceedings{22200, abstract = {{In the polymer laser sinter process, part quality depends on many influencing factors along the process chain. For application of the technology in series production and an integration of laser sintered parts into a technical environment, the dimensional accuracy of parts has to be taken into account. Therefore, occuring deviatons and their scattering have to be reduced and homogenized based on process parameters and build job layout. In this work, the dimensional accuracy of laser sintered parts is analyzed for varied parameter values. Influences of different process and geometrical build job parameters on dimensional deviatons are figured out. The experimental results allow an evaluation of more and less important influences. Finally, measures are deduced to reduce and homogenize dimensional deviations.}}, author = {{Josupeit, Stefan and Delfs, Patrick and Lieneke, Tobias and Adam, Guido and Gessler, Monika and Pfisterer, H. and Schmid, Hans-Joachim}}, booktitle = {{Rapid Tech - International Trade Show & Conference for Additive Manufacturing }}, isbn = {{978-3-446-45060-8}}, pages = {{107--120}}, title = {{{Dimensional accuracy of polymer laser sintered parts: Influences and measures}}}, doi = {{10.3139/9783446450608.009}}, year = {{2016}}, } @inproceedings{22408, author = {{Josupeit, Stefan and Delfs, Patrick and Lieneke, Tobias and Schmid, Hans-Joachim}}, booktitle = {{27th Annual International Solid Freeform Fabrication Symposium }}, title = {{{Influences on the dimensional Accuracy of Laser Sintered Parts along the Process Chain}}}, year = {{2016}}, } @inproceedings{22409, author = {{Lieneke, Tobias and de Groot, Stefan and Adam, Guido and Zimmer, Detmar}}, booktitle = {{ASPE 2016 Summer Topical Meeting}}, pages = {{S.9--15}}, title = {{{Dimensional tolerances for additive manufacturing: Experimental investigation of manufacturing accuracy for selective laser melting}}}, year = {{2016}}, } @inproceedings{22410, author = {{Knoop, Frederick and Lieneke, Tobias and Schoeppner, Volker}}, booktitle = {{ASPE Spring Topical Meeting}}, pages = {{S.3--8}}, title = {{{Reproducibility of the Dimensional Accuracy - Investigations for FDM}}}, doi = {{10.3139/9783446454606.004}}, year = {{2016}}, } @inproceedings{22411, author = {{Knoop, Frederick and Lieneke, Tobias and Schoeppner, Volker}}, booktitle = {{Summer Topical Meeting 2016}}, title = {{{Reproducibility of the Dimensional Accuracy - Investigations for FDM}}}, year = {{2016}}, } @inproceedings{22412, abstract = {{Additive manufacturing creates parts in layers without using formative tools. Compared to established manufacturing processes, additive manufacturing offers many advantages. However, only a few research institutions and technology-leading companies use additive manufacturing for end-use part production because relevant challenges have not been sufficiently researched yet. Missing restrictions become apparent in the available geometrical accuracy. The objective of this investigation was the experimental determination of dimensional tolerances using standard parameters. To this end, a methodical procedure was set up. Based on experimentally determined deviations, dimensional tolerances were derived.}}, author = {{Lieneke, Tobias and Denzer, Vera and Adam, Guido and Zimmer, Detmar}}, booktitle = {{CAT 2016}}, pages = {{286--291}}, title = {{{Dimensional tolerances for additive manufacturing: Experimental investigation for Fused Deposition Modeling}}}, doi = {{10.1016/j.procir.2016.02.361}}, volume = {{43}}, year = {{2016}}, } @book{26113, abstract = {{In the polymer laser sinter process, part quality depends on many influencing factors along the process chain. For application of the technology in series production and an integration of laser sintered parts into a technical environment, the dimensional accuracy of parts has to be taken into account. Therefore, occurring deviations of the process have to be known to define tolerances for part design. Dimensional deviations and their scattering have to be reduced and homogenized based on process parameters and build job layout. In this work, the dimensional accuracy of laser sintered parts is analyzed for varied parameter values. Influences of different process and geometrical build job parameters on dimensional deviations are figured out. The experimental results allow an evaluation of more and less important influences. Finally, measures are deduced to reduce and homogenize dimensional deviations.}}, editor = {{Kniffka, Wieland and Eichmann, Michael and Witt, Gerd and Josupeit, S. and Delfs, P. and Lieneke, Tobias and Adam, G. and Schmid, Hans-Joachim}}, isbn = {{978-3-446-45017-2}}, title = {{{Geometrische Genauigkeit von Lasersinter-Bauteilen: Einflüsse und Maßnahmen / Dimensional accuracy of polymer laser sintered parts: Influences and measures}}}, doi = {{10.3139/9783446450608.009}}, year = {{2016}}, } @inproceedings{22396, abstract = {{Additive manufacturing offers many technical and economical benefits. In order to profit from these benefits, it is necessary to consider the manufacturing limits and restrictions. This applies in particular to the geometrical accuracy. Therefore, the achievable geometrical accuracy needs to be investigated, which enables the determination of realistic tolerances. Thus, two different aims are considered. The first aim is the determination of dimensional tolerances that can be stated if additive manufacturing is used under normal workshop conditions. Within the second aim, relevant process parameters and manufacturing influences will be optimized in order to reduce dimensional deviations. To achieve both aims a method was developed first. This method identifies relevant influential factors on the geometrical accuracy for the processes Fused Deposition Modeling (FDM), Laser Sintering (LS) and Laser Melting (LM). Factors were selected that are expected to affect the geometrical accuracy mainly. The first investigations deal with measuring linear dimensions on a designed test specimen and the derivation of achievable dimensional tolerances. This paper will present both, the developed method and the first results of the experimental investigations.}}, author = {{Lieneke, Tobias and Adam, Guido and Leuders, Stefan and Knoop, Frederick and Josupeit, Stefan and Delfs, Patrick and Funke, Nils and Zimmer, Detmar}}, booktitle = {{26th Annual International Solid Freeform Fabrication Symposium}}, pages = {{371--384}}, title = {{{Systematical determination of tolerances for additive manufacturing by measuring linear dimensions}}}, doi = {{https://www.researchgate.net/publication/316827402_Systematical_Determination_of_Tolerances_for_Additive_Manufacturing_by_Measuring_Linear_Dimensions}}, volume = {{26}}, year = {{2015}}, } @inproceedings{22399, author = {{Lieneke, Tobias}}, booktitle = {{Rapid Tech 2015}}, title = {{{Entwicklung einer Methode zur systematischen Erarbeitung von Maßtoleranzen für additive Fertigungsverfahren}}}, year = {{2015}}, } @inproceedings{22400, author = {{Lieneke, Tobias}}, booktitle = {{26th Annual International Solid Freeform Fabrication Symposium}}, title = {{{Systematical determination of dimensional tolerances for additive manufacturing }}}, volume = {{26}}, year = {{2015}}, } @article{15965, abstract = {{Abstract}}, author = {{Leuders, Stefan and Lieneke, Tobias and Lammers, Stefan and Tröster, Thomas and Niendorf, Thomas}}, issn = {{0884-2914}}, journal = {{Journal of Materials Research}}, pages = {{1911--1919}}, title = {{{On the fatigue properties of metals manufactured by selective laser melting – The role of ductility}}}, doi = {{10.1557/jmr.2014.157}}, year = {{2014}}, }