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IJAT Vol.16 No.5 pp. 642-653
doi: 10.20965/ijat.2022.p0642
(2022)

Paper:

Enhancing the Shape Complexity in Direct Energy Deposition with Phased Deformation

Srinath Gudur, Suryakumar Simhambhatla, and N. Venkata Reddy

Department of Mechanical and Aerospace Engineering, Indian Institute of Technology Hyderabad (IITH)
Kandi, Sangareddy, Telangana 502285, India

Corresponding author

Received:
January 9, 2022
Accepted:
March 9, 2022
Published:
September 5, 2022
Keywords:
metal additive manufacturing, wire-based direct energy deposition (W-DED), hybrid additive manufacturing processes, deformation aided deposition process
Abstract

Wire-based direct energy deposition (W-DED) techniques in metal additive manufacturing allow part-fabrication at higher deposition rates and lower costs. Given the lack of any support mechanism, these processes face challenges in fabricating overhanging features. The inherent overhang capability of weld-beads and higher-order kinematics can help realize certain complex geometries. However, significant challenges like non-uniform slicing, constrained deposition-torch accessibility, etc., limit the efficacy of these approaches. The present work describes a deformation-aided deposition process designed to overcome some of these limitations and to manufacture complex metallic components. It is based on a sequential combination of deposition and bending processes: a shape fabricated through W-DED deposition is bent to form the required shape. The cycle of deposition and bending is repeated until the final desired geometry is realized. The anisotropic and deterministic behaviors of the deposited components are analyzed in terms of springback and the punch force. Finally, the benefit of current hybrid process is demonstrated through a few illustrative geometries.

Cite this article as:
S. Gudur, S. Simhambhatla, and N. Reddy, “Enhancing the Shape Complexity in Direct Energy Deposition with Phased Deformation,” Int. J. Automation Technol., Vol.16, No.5, pp. 642-653, 2022.
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Last updated on Sep. 22, 2022