Novel Processes for Advanced Manufacturing Summary of a Workshop (2013) / Chapter Skim
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2 Additive Manufacturing - Session Summary
2 Additive Manufacturing - Session Summary
Pages 12-24
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From page 12... ...
The seven types of machinery are these: • Binder jetting, in which a binder glues the material together; • Directed energy deposition, in which a laser or electron beam joins mate rial not in a powder bed; 12
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From page 13... ...
Additive manufacturing is an attractive option for low-volume production, but it is not a viable alternative for large-scale production. Additive manufacturing is also able to produce very complicated geometries that standard injection molding may not be capable of.
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From page 14... ...
• Architecture: These include scale models and custom pieces, including those with high levels of geometric detail. • Prototyping: Additive manufacturing could be used in the design process, enabling a more efficient process through rapid prototyping.
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From page 15... ...
Dr. Bourell predicted an increase in the near term in research emphasis on manufacturing in general, and on additive manufacturing specifically, pointing to the National Additive Manufacturing Innovation Institute (NAMII)
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From page 16... ...
There is a need for new metal alloys with characteristics appropriate for additive manufacturing; however, certification considerations are one major concern. The Air Force is likely to reject an altered metal because it would not be able to incorporate parts made from such a metal without a lengthy and tedious recertification process.
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From page 17... ...
At the macroscale, GE has a range of machines that are being commercialized for turbomachinery applications, as well as for direct metal laser melting and elec tron beam processes. Large-scale features are created with existing conventional technologies such as laser and electron beam cladding and spray technologies.
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From page 18... ...
About six companies manufacture the laser machinery, but electron beam processing is 4-5 times faster than laser processing. It was pointed out by a member of the audience that the examples given in the presentation were all mechanical; the person asked whether integrated electronic circuits could be manufactured by additive processing methods.
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From page 19... ...
Dr. Martukanitz described three primary advantages to additive manufacturing: • The ability to reduce costs through decreased material usage and machining; • The ability to create complex designs and features that would be difficult to manufacture with traditional manufacturing methods; and • The ability to use multiple materials or graded materials to locally tailor a component's functionality and performance.
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From page 20... ...
CIMP-3D is divided into two areas: the Advanced Manufacturing Laboratory and the Advanced Design and Prototyping Studio. The Advanced Manufacturing Laboratory contains three primary pieces of equipment: an Optomec LENS MR-7 laser-based powder-fed system for complex geometries, an EOS M280 laser-based powder bed system, and a large Sciaky wire-feed electron beam system.
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From page 21... ...
That information drives the resultant mechanical properties FIGURE 2.2 The five basic modeling tools of the Advanced Design and Prototyping Studio. SOURCE: Richard Martukanitz, Penn State University, presentation to the Standing Committee on Defense Ma terials Manufacturing and Infrastructure on December 5, 2012, slide 15.
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From page 22... ...
He said that a modified electron beam welding system by Sciaky, Inc., has a build envelope of 4 m; this system works by adding material to a plate. This shows that directed energy systems can be quite large in extent.
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From page 23... ...
Multiple participants discussed the need for change in the certification process used by the Federal Aviation Administration, which is currently designed for bulk
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From page 24... ...
Ms. Swink pointed out that the United States lacks an industrial base for ad ditive manufacturing machine systems and for some materials supply to the DOD community and wondered if this posed a problem.
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