Model-based pyrometer alignment method for additive manufacturing by laser metal deposition
Autor: | Johann Stoppok, David Dillkötter, Magnus Thiele, Henrik Dobbelstein, Martin Mönnigmann, Cemal Esen |
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Rok vydání: | 2020 |
Předmět: |
0209 industrial biotechnology
Offset (computer science) Materials science business.industry Process (computing) 02 engineering and technology 010501 environmental sciences 01 natural sciences Temperature measurement law.invention 020901 industrial engineering & automation Optics law Calibration General Earth and Planetary Sciences Laser metal deposition business Focus (optics) Melt pool 0105 earth and related environmental sciences General Environmental Science Pyrometer |
Zdroj: | Procedia CIRP. 94:436-440 |
ISSN: | 2212-8271 |
DOI: | 10.1016/j.procir.2020.09.160 |
Popis: | The melt pool temperature is a key parameter in laser metal deposition (LMD) processes. Reliable temperature measurements are of obvious interest and essential for supervising and controlling the process. However, pyrometers tend to show a non-negligible directional dependency, due to the direction-dependent temperature distribution in the melt pool. We propose a model-based method for determining and physically compensating the misalignment of a pyrometer in an LMD process. The approach is based on a brief calibration run based on which the focus offset can be determined. The resulting offset is used to physically adjust the pyrometer. |
Databáze: | OpenAIRE |
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