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Publisher DOI: 10.1016/j.promfg.2018.11.012
Title: Helical milling of bore holes in Ti6Al4V parts produced by selective laser melting with simultaneous support structure removal
Language: English
Authors: Hintze, Wolfgang 
Schötz, Robert 
Mehnen, Jan Philipp 
Köttner, Lars 
Möller, Carsten 
Keywords: Force;Helical milling;Modeling;SLM;Support structure removal;Surface roughness;Titanium
Issue Date: 13-Dec-2018
Publisher: Elsevier
Source: Procedia Manufacturing (18): 89-96 (2018)
Journal or Series Name: Procedia manufacturing 
Abstract (english): Selective Laser Melting (SLM) is a powder bed based Additive Manufacturing (AM) process that is currently being established in the series production of Ti6Al4V components in the aviation industry. One advantage is the significantly lower Buy-to-Fly ratio. However, subsequent machining is necessary in order to remove support structures of the SLM process and to fulfill quality requirements. Experimental results on support structure removal and simultaneous finishing of holes by helical milling are presented. Engagement conditions in helical milling are strongly influenced by the support structure. Material removal rates in both peripheral and axial direction are calculated and agree well with the variation of measured forces in these directions. In addition, the surface roughness of the machined holes is affected by the support structure design and may change along the hole perimeter. The findings indicate how support structures should be designed in order to obtain high quality bore holes in one machining step.
Conference: 18th Machining Innovations Conference for Aerospace Industry, MIC 2018 
DOI: 10.15480/882.2633
ISSN: 2351-9789
Institute: Produktionsmanagement und -technik M-18 
Type: (wissenschaftlicher) Artikel
Funded by: The results of this publication have been achieved in the project ALM2AIR funded by the German Federal Ministry for Economic Affairs and Energy under funding code 20W1501M.
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