Feature based Weld-Deposition for Additive Manufacturing of Complex Shapes

Panchagnula, Jayaprakash Sharma and Simhambhatla, S (2016) Feature based Weld-Deposition for Additive Manufacturing of Complex Shapes. Journal of The Institution of Engineers (India): Series C. pp. 1-8. ISSN 2250-0545 (In Press)

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Abstract

Fabricating functional metal parts using Additive Manufacturing (AM) is a leading trend. However, realizing overhanging features has been a challenge due to the lack of support mechanism for metals. Powder-bed fusion techniques like, Selective Laser Sintering (SLS) employ easily-breakable-scaffolds made of the same material to realize the overhangs. However, the same approach is not extendible to deposition processes like laser or arc based direct energy deposition processes. Although it is possible to realize small overhangs by exploiting the inherent overhanging capability of the process or by blinding some small features like holes, the same cannot be extended for more complex geometries. The current work presents a novel approach for realizing complex overhanging features without the need of support structures. This is possible by using higher order kinematics and suitably aligning the overhang with the deposition direction. Feature based non-uniform slicing and non-uniform area-filling are some vital concepts required in realizing the same and are briefly discussed here. This method can be used to fabricate and/or repair fully dense and functional components for various engineering applications. Although this approach has been implemented for weld-deposition based system, the same can be extended to any other direct energy deposition processes also.

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IITH Creators:

IITH Creators	ORCiD
Simhambhatla, Suryakumar	http://orcid.org/0000-0001-6015-7593

Item Type:

Article

Additional Information:

This paper is a revised and expanded version of an article entitled, ‘‘Feature based weld-deposition for Additive manufacturing of complex shapes’’ presented in ‘‘Interna- tional Conference on Additive Manufacturing, 3D printing and 3D Scanning’’ held at Chennai, India during February 5–7, 2015.

Subjects:

Physics > Mechanical and aerospace

Divisions:

Department of Mechanical & Aerospace Engineering

Depositing User:

Team Library

Date Deposited:

01 Sep 2016 08:45

Last Modified:

11 Mar 2022 09:26

URI:

http://raiithold.iith.ac.in/id/eprint/2705