Details
| Original language | English |
|---|---|
| Title of host publication | Laser 3D Manufacturing IX |
| Publisher | SPIE |
| Publication status | Published - 4 Mar 2022 |
| Event | Laser 3D Manufacturing IX 2022 - Virtual, Online Duration: 20 Jan 2022 → 24 Jan 2022 |
Publication series
| Name | Proceedings of SPIE - The International Society for Optical Engineering |
|---|---|
| Publisher | SPIE |
| Volume | 11992 |
| ISSN (Print) | 0277-786X |
Abstract
Current strategies for closed loop control of the temperature sensitive selective laser sintering (SLS) process are often based on slow thermal cameras. Another method is single scanner pyrometry. In that case the pyrometer uses the same scanner as the laser. The pyrometer measuring spot and the laser spot are always in the same position. It is not possible to measure temperature outside of the laser spot. In a novel approach, a highly dynamic double scanner system is used to position the measuring beam of a high speed pyrometer. With this approach it is possible to position the laser and measurement spot independently on the powder bed surface (e.g. leading or trailing measurement relative to the laser spot). A very fast pyrometer which outputs measurement data up to 50 kilohertz and FPGA (Field Programmable Gate Array) technology will be used for real time processing of the measured temperature. With this it is possible to process temperature fluctuations on the surface and respond to them very quickly. This technique should be applied to make the SLS process more stable and to get the best results out of the entire build volume. For this purpose, the measured temperature is used to dynamically control the power of the laser.
Keywords
- additive manufacturing, double scanner, high speed pyrometry, Selective laser sintering, spatially resolved temperature detection
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
- Computer Science(all)
- Computer Science Applications
- Mathematics(all)
- Applied Mathematics
- Engineering(all)
- Electrical and Electronic Engineering
Cite this
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Laser 3D Manufacturing IX. SPIE, 2022. 119920C (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11992).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Spatially resolved temperature detection by double scanner and high speed pyrometry for process stabilization of SLS processes
AU - Zander, Christian
AU - Düsing, Jan F.
AU - Hohenhoff, Gerrit
AU - Jäschke, Peter
AU - Kaierle, Stefan
AU - Overmeyer, Ludger
N1 - Funding Information: This investigation is part of the project Control-LS of the Industrial Collective Research program. The authors would like to thank the German Federal Ministry for Economic Affairs and Energy (BMWI) for funding the project Control-LS (20175 N / 2) based on a decision of the German Bundestag.
PY - 2022/3/4
Y1 - 2022/3/4
N2 - Current strategies for closed loop control of the temperature sensitive selective laser sintering (SLS) process are often based on slow thermal cameras. Another method is single scanner pyrometry. In that case the pyrometer uses the same scanner as the laser. The pyrometer measuring spot and the laser spot are always in the same position. It is not possible to measure temperature outside of the laser spot. In a novel approach, a highly dynamic double scanner system is used to position the measuring beam of a high speed pyrometer. With this approach it is possible to position the laser and measurement spot independently on the powder bed surface (e.g. leading or trailing measurement relative to the laser spot). A very fast pyrometer which outputs measurement data up to 50 kilohertz and FPGA (Field Programmable Gate Array) technology will be used for real time processing of the measured temperature. With this it is possible to process temperature fluctuations on the surface and respond to them very quickly. This technique should be applied to make the SLS process more stable and to get the best results out of the entire build volume. For this purpose, the measured temperature is used to dynamically control the power of the laser.
AB - Current strategies for closed loop control of the temperature sensitive selective laser sintering (SLS) process are often based on slow thermal cameras. Another method is single scanner pyrometry. In that case the pyrometer uses the same scanner as the laser. The pyrometer measuring spot and the laser spot are always in the same position. It is not possible to measure temperature outside of the laser spot. In a novel approach, a highly dynamic double scanner system is used to position the measuring beam of a high speed pyrometer. With this approach it is possible to position the laser and measurement spot independently on the powder bed surface (e.g. leading or trailing measurement relative to the laser spot). A very fast pyrometer which outputs measurement data up to 50 kilohertz and FPGA (Field Programmable Gate Array) technology will be used for real time processing of the measured temperature. With this it is possible to process temperature fluctuations on the surface and respond to them very quickly. This technique should be applied to make the SLS process more stable and to get the best results out of the entire build volume. For this purpose, the measured temperature is used to dynamically control the power of the laser.
KW - additive manufacturing
KW - double scanner
KW - high speed pyrometry
KW - Selective laser sintering
KW - spatially resolved temperature detection
UR - http://www.scopus.com/inward/record.url?scp=85131221018&partnerID=8YFLogxK
U2 - 10.1117/12.2607361
DO - 10.1117/12.2607361
M3 - Conference contribution
AN - SCOPUS:85131221018
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Laser 3D Manufacturing IX
PB - SPIE
T2 - Laser 3D Manufacturing IX 2022
Y2 - 20 January 2022 through 24 January 2022
ER -