About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Special Session
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Presentation Title |
Mechanical Interface for Iterative Hybrid Additive/Subtractive Manufacturing |
Author(s) |
Eric Weflen, Michael Ginther, Mohamed Eldakroury, Matthew C. Frank |
On-Site Speaker (Planned) |
Eric Weflen |
Abstract Scope |
Additive and subtractive manufacturing systems for in-envelope production of large objects face challenges in the areas of tool reach and access. One approach to overcoming this is iteratively alternate between AM and subtractive machining. However, polymer objects require cooling before machining, resulting in poor thermal welding when the subsequent polymer layer is deposited. This paper describes a method for iterative AM and machining for in-envelope hybrid manufacturing that uses a mechanical bond to transition back to AM after machining. This is accomplished using an AMBIT screw-extrusion head to additively manufacture a section of the object in a 5-axis machining center. After the object is machined, a dovetail cutting tool forms undercut geometry in the interface where AM will resume. Upon polymer solidification, a mechanical interlock is formed. This work evaluates several undercut geometries for mechanical performance. This iterative approach to hybrid additive/subtractive manufacturing reduces machining complexity while maintaining structural integrity. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |