Details
| Original language | English |
|---|---|
| Title of host publication | IIW 2022 International Conference on Welding and Joining |
| Subtitle of host publication | Innovative Welding and Joining Technologies to achieve Carbon Neutrality and promote Sustainable Development |
| Place of Publication | Tokio |
| Pages | 83-86 |
| Volume | 75 |
| Publication status | Published - 18 Jul 2022 |
| Event | The 75th IIW Annual Assembly and International Conference on Welding and Joining: Innovative Welding and Joining Technologies to achieve Carbon Neutrality and promote Sustainable Development - Tokyo, Japan Duration: 17 Jul 2022 → 22 Jul 2022 |
Abstract
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IIW 2022 International Conference on Welding and Joining: Innovative Welding and Joining Technologies to achieve Carbon Neutrality and promote Sustainable Development. Vol. 75 Tokio, 2022. p. 83-86.
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research
}
TY - GEN
T1 - Process Integrated Closed-loop Control in Wire-Arc-Additive- Manufacturing
AU - Hölscher, Lennart Vincent
AU - Hassel, Thomas
AU - Maier, Hans Jürgen
PY - 2022/7/18
Y1 - 2022/7/18
N2 - One of the biggest obstacles in producing Wire-Arc-Additive-Manufacturing (WAAM) parts is the determination and control of the height step. The torch has to move upwards by the height step after formation of each layer. However, due to natural heat fluxes inside the work piece the necessary height step may vary depending on the layer number and geometry. Other influences on the height step include material, wire feed rate and the actual welding parameters. Currently, before producing WAAM components, the height step needs to be determined for every alloy, wire diameter, wire feed speed, etc. in empirical studies. The use of external sensors could avoid this, but limits the working area. If the height step is determined incorrectly, the contact-tube-working-distance (CTWD) becomes too large and the gas shielding becomes insufficient. If the CTWD becomes too small, the work piece and the torch may collide. Therefore, a new approach that correlates the resistance during short-circuit with the CTWD was developed. With knowledge of the CTWD, the z-axis movements can be adjusted to keep the CTWD constant. This allows the buildup of components without time extensive preliminary experiments. Thereby, WAAM becomes more economical.
AB - One of the biggest obstacles in producing Wire-Arc-Additive-Manufacturing (WAAM) parts is the determination and control of the height step. The torch has to move upwards by the height step after formation of each layer. However, due to natural heat fluxes inside the work piece the necessary height step may vary depending on the layer number and geometry. Other influences on the height step include material, wire feed rate and the actual welding parameters. Currently, before producing WAAM components, the height step needs to be determined for every alloy, wire diameter, wire feed speed, etc. in empirical studies. The use of external sensors could avoid this, but limits the working area. If the height step is determined incorrectly, the contact-tube-working-distance (CTWD) becomes too large and the gas shielding becomes insufficient. If the CTWD becomes too small, the work piece and the torch may collide. Therefore, a new approach that correlates the resistance during short-circuit with the CTWD was developed. With knowledge of the CTWD, the z-axis movements can be adjusted to keep the CTWD constant. This allows the buildup of components without time extensive preliminary experiments. Thereby, WAAM becomes more economical.
M3 - Conference contribution
VL - 75
SP - 83
EP - 86
BT - IIW 2022 International Conference on Welding and Joining
CY - Tokio
T2 - The 75th IIW Annual Assembly and International Conference on Welding and Joining
Y2 - 17 July 2022 through 22 July 2022
ER -