Additive for Subtractive: Design Considerations for Making Additive Manufacturing and Machining Work Well Together

Abstract: Many additive parts need machining in order to be functional. It may be that machining is required to meet dimensional tolerances or to meet surface finish requirements for mating or sealing surfaces, for example. It may be that the part contains features that are difficult to print such as threaded holes or holes with high aspect ratios. These parts may be made in hybrid machine tools (additive and subtractive in the same workspace) or they may be made by hybrid processes (separate additive and subtractive machines). In such cases, the total part cost including the additive and subtractive operations can be reduced if the additive preform is designed with the subtractive operations in mind. The additive preform can contain features to help locate the part and features to help fixture the part in the machine tool. Stiffening features can be used so that the part is stiff enough to support the machining forces that will be required. This presentation will show both the general concepts, and specific examples of additive for subtractive.  

The presentation will include high-level overviews of several other machine tool research activities at Oak Ridge National Laboratory's (ORNL) Manufacturing Demonstration Facility. 

Bio: Dr. Scott Smith leads ORNL's advanced machining and machine tool research, focusing on developing new machine tools, and hardware and software to improve machine tool productivity. He leads a national machine tool program, America’s Cutting Edge (ACE) aimed at revitalizing the machine tool industry in the US and improving US manufacturing competitiveness.  
Prior to joining ORNL, Dr. Smith was a professor and chair of Mechanical Engineering at the University of North Carolina at Charlotte. Dr. Smith served as the Assistant Director for Technology at the U.S. Advanced Manufacturing National Program Office in Washington DC. He is the author of 2 textbooks on vibrations and machine dynamics. 
 
He is a Fellow of the American Society of Mechanical Engineers, a Fellow of the Society of Manufacturing Engineers, and one of 17 US Fellows of the International Academy for Production Engineering (CIRP).  
 
Smith received his Ph.D. from the University of Florida in 1987. He has more than 35 years of experience as a machine tool researcher. Among many honors, he is the recipient of the M. Eugene Merchant Manufacturing Medal of ASME and SME for “providing fundamental and translational research contributions that have improved the production of highly engineered components in the automotive and aerospace sectors,” and the William T. Ennor Manufacturing Technology Award from ASME for his “innovations in the field of machining dynamics that have been commercially implemented, leading to significant improvements in machine tool performance and enabling the creation of thin monolithic machined structures in a variety of industries.” He has received two R&D 100 Awards, and he holds 11 patents. 

In-person talk with virtual meeting option.
For those attending, lunch will be served for FREE to attendees.

Location: Callaway/GTMI bldg,
Room 114

Additive for Subtractive: Design Considerations for Making Additive Manufacturing and Machining Work Well Together 
Scott Smith, Ph.D., Group Leader Machine Tools, Oak Ridge National Laboratory

Zoom meeting link:
https://gatech.zoom.us/j/94547654445?pwd=ZW82d1dnOS9lM1dBczZ4QjNKbzVxUT09