Integration Challenges with Additive/Subtractive In-Envelope Hybrid Manufacturing

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Date

2019

Authors

Frank, Matthew C.
Croghan, Jakob
Larson, Samantha
Beguhn, Logan

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University of Texas at Austin

Abstract

There are significant practical challenges when combining additive and subtractive manufacturing systems. The integration of AM and machining processes can be done sequentially or in-envelope. A sequential example would be where an AM part is removed from the build plate and then fixtured into a milling machine; essentially post-processing a near-net shape part. Alternately, an AM system can be added to a milling machine or a milling process can be added to an AM system, which we would refer to as in-envelope. This paper presents some of the practical challenges of in-envelope hybrid manufacturing; both metal and plastic AM within a CNC milling machine. In this work, a method to accomplish iterative machining in the presence of extra material allowance and limited cutting tool lengths will be described. In addition, preliminary work on accommodating multi-materials within a hybrid system will be presented.

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