Browsing by Subject "3D CAD"

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    Metal Processing Using Selective Laser Sintering and Hot Isostatic Pressing (SLSIHIP)
    (1996) Knight, Ronald; Wright, Joseph; Beaman, Joseph; Freitag, Douglas
    In July of 1995 the Office of Naval Research (ONR) awarded a contract to Loral Vought Systems entitled Low Cost Metal Processing Using SLSIHIP. The two-phase, four-year program is co-sponsored by ONR and the Defense Advanced Research Projects Agency, DARPA. The program addresses the DoD and Navy need to improve the reprocurement, remanufacture and repair methodology for high value metal parts. The specific program objective is to develop and demonstrate Selec~:ve Laser Sintering (SLS) as a lower cost, flexible and faster method of fabricating spare and replacement, small/medium sized powder metal parts for DoD weapon systems. Current activity is f~cused on development of a high temperature SLS workstation and on selective laser sintering trials on candidate metal powders including Inconel, molybdenum and titanium.
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    Rapid Prototyping of Functional Metal and Ceramic Components By The Multiphase Jet Solidification (MJS) Process
    (1997) Kupp, Donald; Eifert, Harald; Greul, Matthias; Kunstner, Matthias
    The need to generate high-quality conceptual models ofmanufacturing components and limited application functional components has driven the development ofRapid Prototyping (RP) in the last fifteen years. Recently, however, it has become increasingly obvious that an RP system that can produce fully functional components in materials other than polymers would be beneficial. In order to fulfill the requirements for the direct production ofmetallic and ceramic components for functional testing and application, the development ofnew processes and materials are key development areas at the Fraunhofer Institute for Applied Materials Research (IFAM) and the Fraunhofer Resource Center-Delaware (FRC-DE). For the free-form fabrication of ceramic and metal parts, the Multiphase Jet Solidification (MJS) process has been developed for producing metal and ceramic components. The MJS process extrudes metal and ceramic based binder systems (such as A120 3, SiC, stainless steel, and Ti), forming the desired component layer by layer. As in powder injection molding, after a part is formed by MJS, the binder phase is removed chemically or thermally and the remaining powder compact is sintered to final density. This paper presents the MJS technique and outlines a variety ofpotential applications.