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Title: Effect of additive and subtractive sequence on the distortion of cone-shaped part during hybrid direct energy deposition

Journal Article · · Journal of Manufacturing Processes

Hybrid manufacturing combines additive manufacturing (AM) and subtractive manufacturing processes to achieve simultaneous benefits. Unlike traditional AM, it allows for interleaved subtractive steps, enhancing machining tool access for parts with high aspect ratios. However, optimizing the printing sequence remains as an area of exploration. In this study with two conical shapes, one exhibited a geometrical mismatch at the interface between two printing sections, while the other did not. 3D laser scanning, finite element simulation, and methodical analysis were used to understand this issue. Printing support structure before machining improved dimensional accuracy, with 0.5 mm reduction in distortion achieved, corresponding to 50 % of the final wall thickness. However, the absence of a feedback mechanism to track wall distortion after the additive process resulted in non-uniform wall thickness with a constant depth of cut during the machining operation. This research highlights the importance of process sequencing in hybrid manufacturing for achieving desired geometry.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Advanced Materials & Manufacturing Technologies Office (AMMTO); USDOE
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
2331509
Alternate ID(s):
OSTI ID: 2333857
Journal Information:
Journal of Manufacturing Processes, Vol. 119, Issue 1; ISSN 1526-6125
Publisher:
Society of Manufacturing Engineers; ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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