A SPHERICAL TEST ARTIFACT TO EVALUATE THREE-DIMENSIONAL FORM ACCURACY FOR WIRE ARC ADDITIVE MANUFACTURING

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Date

2023

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University of Texas at Austin

Abstract

Additive manufacturing, including the wire arc additive manufacturing (WAAM), is gradually gaining attraction, and providing benefits in the aerospace and construction industries. In both industries, large-scale manufacturing capability and quality consistency of manufactured 3D parts are crucial. As part of quality evaluation, test artifacts for the geometric capability assessment are specified in ISO/ASTM52902-2019(E). On the other hand, the test artifact for curved wall is left undefined. This paper proposes a spherical shell shape as a representative of three-dimensional shapes that are supportless and feature large overhangs, for testing the geometric capability of a WAAM equipment. A mechanical configuration and deposition strategy are considered, which owns the potential to universally applying for depositing large-scale parts. A quality evaluation process for the sphere deposition was also described and experimentally demonstrated.

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