期刊
47TH SME NORTH AMERICAN MANUFACTURING RESEARCH CONFERENCE (NAMRC 47)
卷 34, 期 -, 页码 482-488出版社
ELSEVIER
DOI: 10.1016/j.promfg.2019.06.202
关键词
large-scale additive manufacturing; in-situ process monitoring; Big Area Additive Manufacturing; thermal analysis
资金
- U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Office of Advanced Manufacturing [DE-AC05-00OR22725]
Ideally, objects are constructed as quickly as possible; however, short build times for a layer can present an issue. Short layer build times do not provide enough time for the material to cool sufficiently. As a result, an object cannot support its own weight nor deal with overhanging features. Additionally, the generation of support structures may be impractical either due to geometry or, in the case of large-scale polymer additive manufacturing, due to being difficult to remove. To address these issues, researchers at Oak Ridge National Laboratory's Manufacturing Demonstration Facility investigated the use of a thermal camera mounted to a gantry to collect data on an object under construction. This data provided feedback for an in-situ control system to adjust layer build times. Adjustments were made in the form of additional waiting to allow the material to cool to specific thermal thresholds. This additional cooling time allowed the construction of objects with low layer build times or overhanging features that would have otherwise failed. (C) 2019 The Authors. Published by Elsevier B.V.
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