Integration Challenges with Additive/Subtractive In-Envelope Hybrid Manufacturing

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

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University of Texas at Austin


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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