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
Rok vydání: 2020
Předmět:
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