Abstract
The arc-based additive manufacturing process offers high deposition rates with a drawback of creating irregular surfaces necessitating post-machining efforts. These post-processing activities use up vital raw materials and considerable energy resources. Developing predictive capabilities for surface topography becomes essential to counter these challenges. Such predictions rely on key process parameters, including wire feed and travel speeds. In this study, we develop a surface topography model that reconstructs surfaces using wire feed speed, travel speed, and interpass temperature as input parameters. The initial phase is to identify the relevant surface features that together describe the surface. From the several features scrutinized, eight representative attributes have been discerned and used in developing the surface reconstruction model, including spatial average roughness, spatial peak height, spatial maximum valley depth, spatial skewness, spatial kurtosis, maximum flatness, and waviness. The surface reconstruction model leverages the discrete cosine transform (DCT) and requires at least 30 DCT parameters for accurate surface reconstruction. Moreover, an ANN model is introduced to predict the DCT parameters based on the wire feed speed, travel speed, and interpass temperature inputs. Validation with the 309L stainless steel test material highlights the model’s commendable accuracy in predicting the DCT parameters, paving the way for precise projections of overall surface topography and machining allowances. This model sets the stage for simulation-based additive-subtractive process design, pinpointing optimal deposition conditions and matching machining parameters. Additionally, it facilitates the seamless integration of realistic surfaces into computational models for additive process simulations, holding immense potential to refine additive manufacturing processes.
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Data availability
The data that support the findings of this study are available from the corresponding author, AS, upon reasonable request.
Abbreviations
- AM:
-
Additive manufacturing
- ANN:
-
Artificial neural network
- ANOVA:
-
Analysis of variance
- CTWD:
-
Contact tip to work distance
- DCT:
-
Direct cosine transform
- GMAW:
-
Gas metal arc welding
- IDCT:
-
Inverse discrete cosine transform
- IT:
-
Interpass temperature
- LMD:
-
Laser metal deposition
- MSE:
-
Mean square error
- TS:
-
Travel speed
- WAAM:
-
Wire and arc additive manufacturing
- WFS:
-
Wire feed speed
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Acknowledgements
The authors acknowledge the help of the research group member, Ozan Can Ozaner, in conducting some experiments.
Funding
Support for this work comes from the project “Advanced Processing of Additively Manufactured Parts II (Ad-Proc-Add II)” (HBC.2021.0278) funded by Agentschap Innoveren en Ondernemen.
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SAB: writing—original draft, software, investigation, formal analysis, visualization. AS: Conceptualization, funding acquisition, supervision, writing—review and editing.
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Banaee, S.A., Sharma, A. Artificial neural network-based surface reconstruction model of wire-arc additively manufactured surfaces using discrete cosine transform. Weld World 68, 731–741 (2024). https://doi.org/10.1007/s40194-023-01625-0
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DOI: https://doi.org/10.1007/s40194-023-01625-0